BinaryWriter.Write Metod

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

public:
 virtual void Write(cli::array <char> ^ chars, int index, int count);

public virtual void Write(char[] chars, int index, int count);

abstract member Write : char[] * int * int -> unit
override this.Write : char[] * int * int -> unit

Public Overridable Sub Write (chars As Char(), index As Integer, count As Integer)

Parametrar

Undantag

Exempel

Följande kodexempel visar hur du läser och skriver data med hjälp av minne som ett lagringsplats för säkerhetskopiering.

using System;
using System.IO;

class BinaryRW
{
    static void Main()
    {
        char[] invalidPathChars = Path.InvalidPathChars;
        MemoryStream memStream = new MemoryStream();
        BinaryWriter binWriter = new BinaryWriter(memStream);

        // Write to memory.
        binWriter.Write("Invalid file path characters are: ");
        binWriter.Write(
            Path.InvalidPathChars, 0, Path.InvalidPathChars.Length);

        // Create the reader using the same MemoryStream
        // as used with the writer.
        BinaryReader binReader = new BinaryReader(memStream);

        // Set Position to the beginning of the stream.
        memStream.Position = 0;

        // Read the data from memory and write it to the console.
        Console.Write(binReader.ReadString());
        int arraySize = (int)(memStream.Length - memStream.Position);
        char[] memoryData = new char[arraySize];
        binReader.Read(memoryData, 0, arraySize);
        Console.WriteLine(memoryData);
    }
}

open System.IO

let invalidPathChars = Path.GetInvalidPathChars()
let memStream = new MemoryStream()
let binWriter = new BinaryWriter(memStream)

// Write to memory.
binWriter.Write "Invalid file path characters are: "
binWriter.Write(invalidPathChars, 0, invalidPathChars.Length)

// Create the reader using the same MemoryStream
// as used with the writer.
let binReader = new BinaryReader(memStream)

// Set Position to the beginning of the stream.
memStream.Position <- 0

// Read the data from memory and write it to the console.
printf $"{binReader.ReadString()}"
let arraySize = memStream.Length - memStream.Position |> int
let memoryData = Array.zeroCreate<char> arraySize
binReader.Read(memoryData, 0, arraySize) |> ignore
printfn $"{memoryData}"

Imports System.IO

Public Class BinaryRW

    Shared Sub Main()
    
        Dim invalidPathChars() As Char = Path.InvalidPathChars
        Dim memStream As new MemoryStream()
        Dim binWriter As New BinaryWriter(memStream)

        ' Write to memory.
        binWriter.Write("Invalid file path characters are: ")
        binWriter.Write(Path.InvalidPathChars, 0, _
            Path.InvalidPathChars.Length)

        ' Create the reader using the same MemoryStream 
        ' as used with the writer.
        Dim binReader As New BinaryReader(memStream)

        ' Set Position to the beginning of the stream.
        memStream.Position = 0

        ' Read the data from memory and write it to the console.
        Console.Write(binReader.ReadString())
        Dim upperBound As Integer = _
            CInt(memStream.Length - memStream.Position) - 1
        Dim memoryData(upperBound) As Char
        binReader.Read(memoryData, 0, upperBound)
        Console.WriteLine(memoryData)
    
    End Sub
End Class

Kommentarer

En lista över vanliga I/O-uppgifter finns i Vanliga I/O-uppgifter.

Se även

• Encoding
• Fil- och ström-I/O
• Anvisningar: Läsa text från en fil
• Anvisningar: Skriva text till en fil

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

public:
 virtual void Write(cli::array <System::Byte> ^ buffer, int index, int count);

public virtual void Write(byte[] buffer, int index, int count);

abstract member Write : byte[] * int * int -> unit
override this.Write : byte[] * int * int -> unit

Public Overridable Sub Write (buffer As Byte(), index As Integer, count As Integer)

Parametrar

Undantag

Exempel

I följande kodexempel visas hur du skriver binära data med hjälp av minne som ett lagringslager och sedan kontrollerar att data har skrivits korrekt.

using System;
using System.IO;

namespace BinaryRW
{
    class Program
    {
        static void Main(string[] args)
        {
            const int arrayLength = 1000;
            byte[] dataArray = new byte[arrayLength];
            byte[] verifyArray = new byte[arrayLength];

            new Random().NextBytes(dataArray);

            using (BinaryWriter binWriter = new BinaryWriter(new MemoryStream()))
            {
                Console.WriteLine("Writing the data.");
                binWriter.Write(dataArray, 0, arrayLength);

                using (BinaryReader binReader = new BinaryReader(binWriter.BaseStream))
                {
                    binReader.BaseStream.Position = 0;

                    if (binReader.Read(verifyArray, 0, arrayLength) != arrayLength)
                    {
                        Console.WriteLine("Error writing the data.");
                        return;
                    }
                }
            }

            for (int i = 0; i < arrayLength; i++)
            {
                if (verifyArray[i] != dataArray[i])
                {
                    Console.WriteLine("Error writing the data.");
                    return;
                }
            }

            Console.WriteLine("The data was written and verified.");
        }
    }
}

open System
open System.IO

let arrayLength = 1000
let dataArray = Array.zeroCreate<byte> arrayLength
let verifyArray = Array.zeroCreate<byte> arrayLength

Random().NextBytes dataArray

do
    use binWriter = new BinaryWriter(new MemoryStream())
    printfn "Writing the data."
    binWriter.Write(dataArray, 0, arrayLength)

    use binReader = new BinaryReader(binWriter.BaseStream)
    binReader.BaseStream.Position <- 0

    if binReader.Read(verifyArray, 0, arrayLength) <> arrayLength then
        printfn "Error writing the data."
    else
        for i = 0 to arrayLength - 1 do
            if verifyArray[i] <> dataArray[i] then
                printfn "Error writing the data."
            else
                printfn "The data was written and verified."

Imports System.IO

Module Module1

    Sub Main()
        Const upperBound As Integer = 1000
        Dim dataArray(upperBound) As Byte
        Dim verifyArray(upperBound) As Byte

        Dim randomGenerator As New Random
        randomGenerator.NextBytes(dataArray)

        Using binWriter As New BinaryWriter(New MemoryStream())
            Console.WriteLine("Writing the data.")
            binWriter.Write(dataArray, 0, dataArray.Length)

            Using binReader As New BinaryReader(binWriter.BaseStream)
                binReader.BaseStream.Position = 0

                If binReader.Read(verifyArray, 0, dataArray.Length) <> dataArray.Length Then
                    Console.WriteLine("Error writing the data.")
                    Return
                End If
            End Using
        End Using

        For i As Integer = 0 To upperBound
            If verifyArray(i) <> dataArray(i) Then
                Console.WriteLine("Error writing the data.")
                Return
            End If
        Next i

        Console.WriteLine("The data was written and verified.")
    End Sub

End Module

Kommentarer

En lista över vanliga I/O-uppgifter finns i Vanliga I/O-uppgifter.

Se även

• Fil- och ström-I/O
• Anvisningar: Läsa text från en fil
• Anvisningar: Skriva text till en fil

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

public:
 virtual void Write(System::UInt64 value);

[System.CLSCompliant(false)]
public virtual void Write(ulong value);

[<System.CLSCompliant(false)>]
abstract member Write : uint64 -> unit
override this.Write : uint64 -> unit

Public Overridable Sub Write (value As ULong)

Parametrar

Attribut

CLSCompliantAttribute

Undantag

Kommentarer

BinaryWriter lagrar den här datatypen i lite endianskt format.

En lista över vanliga I/O-uppgifter finns i Vanliga I/O-uppgifter.

Se även

• Fil- och ström-I/O
• Anvisningar: Läsa text från en fil
• Anvisningar: Skriva text till en fil

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

public:
 virtual void Write(System::UInt32 value);

[System.CLSCompliant(false)]
public virtual void Write(uint value);

[<System.CLSCompliant(false)>]
abstract member Write : uint32 -> unit
override this.Write : uint32 -> unit

Public Overridable Sub Write (value As UInteger)

Parametrar

Attribut

CLSCompliantAttribute

Undantag

Kommentarer

BinaryWriter lagrar den här datatypen i lite endianskt format.

En lista över vanliga I/O-uppgifter finns i Vanliga I/O-uppgifter.

Se även

• Fil- och ström-I/O
• Anvisningar: Läsa text från en fil
• Anvisningar: Skriva text till en fil

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

public:
 virtual void Write(System::UInt16 value);

[System.CLSCompliant(false)]
public virtual void Write(ushort value);

[<System.CLSCompliant(false)>]
abstract member Write : uint16 -> unit
override this.Write : uint16 -> unit

Public Overridable Sub Write (value As UShort)

Parametrar

Attribut

CLSCompliantAttribute

Undantag

Kommentarer

BinaryWriter lagrar den här datatypen i lite endianskt format.

En lista över vanliga I/O-uppgifter finns i Vanliga I/O-uppgifter.

Se även

• Fil- och ström-I/O
• Anvisningar: Läsa text från en fil
• Anvisningar: Skriva text till en fil

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

public:
 virtual void Write(System::String ^ value);

public virtual void Write(string value);

abstract member Write : string -> unit
override this.Write : string -> unit

Public Overridable Sub Write (value As String)

Parametrar

Undantag

Exempel

Följande kodexempel visar hur du lagrar och hämtar programinställningar i en fil.

using System;
using System.IO;
using System.Text;

class ConsoleApplication
{
    const string fileName = "AppSettings.dat";

    static void Main()
    {
        WriteDefaultValues();
        DisplayValues();
    }

    public static void WriteDefaultValues()
    {
        using (var stream = File.Open(fileName, FileMode.Create))
        {
            using (var writer = new BinaryWriter(stream, Encoding.UTF8, false))
            {
                writer.Write(1.250F);
                writer.Write(@"c:\Temp");
                writer.Write(10);
                writer.Write(true);
            }
        }
    }

    public static void DisplayValues()
    {
        float aspectRatio;
        string tempDirectory;
        int autoSaveTime;
        bool showStatusBar;

        if (File.Exists(fileName))
        {
            using (var stream = File.Open(fileName, FileMode.Open))
            {
                using (var reader = new BinaryReader(stream, Encoding.UTF8, false))
                {
                    aspectRatio = reader.ReadSingle();
                    tempDirectory = reader.ReadString();
                    autoSaveTime = reader.ReadInt32();
                    showStatusBar = reader.ReadBoolean();
                }
            }

            Console.WriteLine("Aspect ratio set to: " + aspectRatio);
            Console.WriteLine("Temp directory is: " + tempDirectory);
            Console.WriteLine("Auto save time set to: " + autoSaveTime);
            Console.WriteLine("Show status bar: " + showStatusBar);
        }
    }
}

open System.IO
open System.Text

let fileName = "AppSettings.dat"

let writeDefaultValues () =
    use stream = File.Open(fileName, FileMode.Create)
    use writer = new BinaryWriter(stream, Encoding.UTF8, false)
    writer.Write 1.250F
    writer.Write @"c:\Temp"
    writer.Write 10
    writer.Write true

let displayValues () =
    if File.Exists fileName then
        use stream = File.Open(fileName, FileMode.Open)
        use reader = new BinaryReader(stream, Encoding.UTF8, false)
        let aspectRatio = reader.ReadSingle()
        let tempDirectory = reader.ReadString()
        let autoSaveTime = reader.ReadInt32()
        let showStatusBar = reader.ReadBoolean()

        printfn $"Aspect ratio set to: {aspectRatio}"
        printfn $"Temp directory is: {tempDirectory}"
        printfn $"Auto save time set to: {autoSaveTime}"
        printfn $"Show status bar: {showStatusBar}"

writeDefaultValues ()
displayValues ()

Imports System.IO

Module Module1
    Const fileName As String = "AppSettings.dat"

    Sub Main()
        WriteDefaultValues()
        DisplayValues()
    End Sub

    Sub WriteDefaultValues()
        Using writer As BinaryWriter = New BinaryWriter(File.Open(fileName, FileMode.Create))
            writer.Write(1.25F)
            writer.Write("c:\Temp")
            writer.Write(10)
            writer.Write(True)
        End Using
    End Sub

    Sub DisplayValues()
        Dim aspectRatio As Single
        Dim tempDirectory As String
        Dim autoSaveTime As Integer
        Dim showStatusBar As Boolean

        If (File.Exists(fileName)) Then

            Using reader As BinaryReader = New BinaryReader(File.Open(fileName, FileMode.Open))
                aspectRatio = reader.ReadSingle()
                tempDirectory = reader.ReadString()
                autoSaveTime = reader.ReadInt32()
                showStatusBar = reader.ReadBoolean()
            End Using

            Console.WriteLine("Aspect ratio set to: " & aspectRatio)
            Console.WriteLine("Temp directory is: " & tempDirectory)
            Console.WriteLine("Auto save time set to: " & autoSaveTime)
            Console.WriteLine("Show status bar: " & showStatusBar)
        End If
    End Sub

End Module

Kommentarer

Längdprefix innebär att den här metoden först skriver längden på strängen, i byte, när den kodas med instansens BinaryWriter aktuella kodning till strömmen. Det här värdet skrivs som ett osignerat heltal. Den här metoden skriver sedan så många byte till strömmen.

Strängen "A" har till exempel en längd på 1, men när den kodas med UTF-16; längden är 2 byte, så värdet som skrivs i prefixet är 2 och 3 byte skrivs till strömmen, inklusive prefixet.

En lista över vanliga I/O-uppgifter finns i Vanliga I/O-uppgifter.

Se även

• Encoding
• Fil- och ström-I/O
• Anvisningar: Läsa text från en fil
• Anvisningar: Skriva text till en fil

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

public:
 virtual void Write(float value);

public virtual void Write(float value);

abstract member Write : single -> unit
override this.Write : single -> unit

Public Overridable Sub Write (value As Single)

Parametrar

Undantag

Exempel

Följande kodexempel visar hur du lagrar och hämtar programinställningar i en fil.

using System;
using System.IO;
using System.Text;

class ConsoleApplication
{
    const string fileName = "AppSettings.dat";

    static void Main()
    {
        WriteDefaultValues();
        DisplayValues();
    }

    public static void WriteDefaultValues()
    {
        using (var stream = File.Open(fileName, FileMode.Create))
        {
            using (var writer = new BinaryWriter(stream, Encoding.UTF8, false))
            {
                writer.Write(1.250F);
                writer.Write(@"c:\Temp");
                writer.Write(10);
                writer.Write(true);
            }
        }
    }

    public static void DisplayValues()
    {
        float aspectRatio;
        string tempDirectory;
        int autoSaveTime;
        bool showStatusBar;

        if (File.Exists(fileName))
        {
            using (var stream = File.Open(fileName, FileMode.Open))
            {
                using (var reader = new BinaryReader(stream, Encoding.UTF8, false))
                {
                    aspectRatio = reader.ReadSingle();
                    tempDirectory = reader.ReadString();
                    autoSaveTime = reader.ReadInt32();
                    showStatusBar = reader.ReadBoolean();
                }
            }

            Console.WriteLine("Aspect ratio set to: " + aspectRatio);
            Console.WriteLine("Temp directory is: " + tempDirectory);
            Console.WriteLine("Auto save time set to: " + autoSaveTime);
            Console.WriteLine("Show status bar: " + showStatusBar);
        }
    }
}

open System.IO
open System.Text

let fileName = "AppSettings.dat"

let writeDefaultValues () =
    use stream = File.Open(fileName, FileMode.Create)
    use writer = new BinaryWriter(stream, Encoding.UTF8, false)
    writer.Write 1.250F
    writer.Write @"c:\Temp"
    writer.Write 10
    writer.Write true

let displayValues () =
    if File.Exists fileName then
        use stream = File.Open(fileName, FileMode.Open)
        use reader = new BinaryReader(stream, Encoding.UTF8, false)
        let aspectRatio = reader.ReadSingle()
        let tempDirectory = reader.ReadString()
        let autoSaveTime = reader.ReadInt32()
        let showStatusBar = reader.ReadBoolean()

        printfn $"Aspect ratio set to: {aspectRatio}"
        printfn $"Temp directory is: {tempDirectory}"
        printfn $"Auto save time set to: {autoSaveTime}"
        printfn $"Show status bar: {showStatusBar}"

writeDefaultValues ()
displayValues ()

Imports System.IO

Module Module1
    Const fileName As String = "AppSettings.dat"

    Sub Main()
        WriteDefaultValues()
        DisplayValues()
    End Sub

    Sub WriteDefaultValues()
        Using writer As BinaryWriter = New BinaryWriter(File.Open(fileName, FileMode.Create))
            writer.Write(1.25F)
            writer.Write("c:\Temp")
            writer.Write(10)
            writer.Write(True)
        End Using
    End Sub

    Sub DisplayValues()
        Dim aspectRatio As Single
        Dim tempDirectory As String
        Dim autoSaveTime As Integer
        Dim showStatusBar As Boolean

        If (File.Exists(fileName)) Then

            Using reader As BinaryReader = New BinaryReader(File.Open(fileName, FileMode.Open))
                aspectRatio = reader.ReadSingle()
                tempDirectory = reader.ReadString()
                autoSaveTime = reader.ReadInt32()
                showStatusBar = reader.ReadBoolean()
            End Using

            Console.WriteLine("Aspect ratio set to: " & aspectRatio)
            Console.WriteLine("Temp directory is: " & tempDirectory)
            Console.WriteLine("Auto save time set to: " & autoSaveTime)
            Console.WriteLine("Show status bar: " & showStatusBar)
        End If
    End Sub

End Module

Kommentarer

BinaryWriter lagrar den här datatypen i lite endianskt format.

En lista över vanliga I/O-uppgifter finns i Vanliga I/O-uppgifter.

Se även

• Fil- och ström-I/O
• Anvisningar: Läsa text från en fil
• Anvisningar: Skriva text till en fil

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

public:
 virtual void Write(System::SByte value);

[System.CLSCompliant(false)]
public virtual void Write(sbyte value);

[<System.CLSCompliant(false)>]
abstract member Write : sbyte -> unit
override this.Write : sbyte -> unit

Public Overridable Sub Write (value As SByte)

Parametrar

Attribut

CLSCompliantAttribute

Undantag

Kommentarer

En lista över vanliga I/O-uppgifter finns i Vanliga I/O-uppgifter.

Se även

• Fil- och ström-I/O
• Anvisningar: Läsa text från en fil
• Anvisningar: Skriva text till en fil

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

public:
 virtual void Write(ReadOnlySpan<char> chars);

public virtual void Write(ReadOnlySpan<char> chars);

abstract member Write : ReadOnlySpan<char> -> unit
override this.Write : ReadOnlySpan<char> -> unit

Public Overridable Sub Write (chars As ReadOnlySpan(Of Char))

Parametrar

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

public:
 virtual void Write(ReadOnlySpan<System::Byte> buffer);

public virtual void Write(ReadOnlySpan<byte> buffer);

abstract member Write : ReadOnlySpan<byte> -> unit
override this.Write : ReadOnlySpan<byte> -> unit

Public Overridable Sub Write (buffer As ReadOnlySpan(Of Byte))

Parametrar

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

public:
 virtual void Write(long value);

public virtual void Write(long value);

abstract member Write : int64 -> unit
override this.Write : int64 -> unit

Public Overridable Sub Write (value As Long)

Parametrar

Undantag

Kommentarer

BinaryWriter lagrar den här datatypen i lite endianskt format.

En lista över vanliga I/O-uppgifter finns i Vanliga I/O-uppgifter.

Se även

• Fil- och ström-I/O
• Anvisningar: Läsa text från en fil
• Anvisningar: Skriva text till en fil

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

public:
 virtual void Write(cli::array <char> ^ chars);

public virtual void Write(char[] chars);

abstract member Write : char[] -> unit
override this.Write : char[] -> unit

Public Overridable Sub Write (chars As Char())

Parametrar

Undantag

Exempel

Följande kodexempel visar hur du läser och skriver data med hjälp av minne som ett lagringsplats för säkerhetskopiering.

using System;
using System.IO;

class BinaryRW
{
    static void Main()
    {
        char[] invalidPathChars = Path.InvalidPathChars;
        MemoryStream memStream = new MemoryStream();
        BinaryWriter binWriter = new BinaryWriter(memStream);

        // Write to memory.
        binWriter.Write("Invalid file path characters are: ");
        binWriter.Write(Path.InvalidPathChars);

        // Create the reader using the same MemoryStream
        // as used with the writer.
        BinaryReader binReader = new BinaryReader(memStream);

        // Set Position to the beginning of the stream.
        memStream.Position = 0;

        // Read the data from memory and write it to the console.
        Console.Write(binReader.ReadString());
        Console.WriteLine(binReader.ReadChars(
            (int)(memStream.Length - memStream.Position)));
    }
}

open System.IO

let invalidPathChars = Path.GetInvalidPathChars()
let memStream = new MemoryStream()
let binWriter = new BinaryWriter(memStream)

// Write to memory.
binWriter.Write "Invalid file path characters are: "
binWriter.Write invalidPathChars

// Create the reader using the same MemoryStream
// as used with the writer.
let binReader = new BinaryReader(memStream)

// Set Position to the beginning of the stream.
memStream.Position <- 0

// Read the data from memory and write it to the console.
printf $"{binReader.ReadString()}"
printfn $"{binReader.ReadChars(int (memStream.Length - memStream.Position))}"

Imports System.IO

Public Class BinaryRW

    Shared Sub Main()
    
        Dim invalidPathChars() As Char = Path.InvalidPathChars
        Dim memStream As new MemoryStream()
        Dim binWriter As New BinaryWriter(memStream)

        ' Write to memory.
        binWriter.Write("Invalid file path characters are: ")
        binWriter.Write(Path.InvalidPathChars)

        ' Create the reader using the same MemoryStream 
        ' as used with the writer.
        Dim binReader As New BinaryReader(memStream)

        ' Set Position to the beginning of the stream.
        memStream.Position = 0

        ' Read the data from memory and write it to the console.
        Console.Write(binReader.ReadString())
        Console.WriteLine(binReader.ReadChars( _
            CInt(memStream.Length - memStream.Position)))
    
    End Sub
End Class

Kommentarer

I följande tabell visas exempel på andra typiska eller relaterade I/O-uppgifter.

Se även

• Encoding
• Fil- och ström-I/O
• Anvisningar: Läsa text från en fil
• Anvisningar: Skriva text till en fil

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

public:
 virtual void Write(short value);

public virtual void Write(short value);

abstract member Write : int16 -> unit
override this.Write : int16 -> unit

Public Overridable Sub Write (value As Short)

Parametrar

Undantag

Kommentarer

BinaryWriter lagrar den här datatypen i lite endianskt format.

I följande tabell visas exempel på andra typiska eller relaterade I/O-uppgifter.

Se även

• Fil- och ström-I/O
• Anvisningar: Läsa text från en fil
• Anvisningar: Skriva text till en fil

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

public:
 virtual void Write(Half value);

public virtual void Write(Half value);

abstract member Write : Half -> unit
override this.Write : Half -> unit

Public Overridable Sub Write (value As Half)

Parametrar

Undantag

Exempel

I följande kodexempel visas hur du läser och skriver Double data till minnet med hjälp BinaryReader av klasserna och BinaryWriter ovanpå MemoryStream klassen. MemoryStream läser och skriver Byte endast data.

using System;
using System.IO;

class BinaryRW
{
    static void Main()
    {
        int i;
        const int arrayLength = 1000;

        // Create random data to write to the stream.
        Random randomGenerator = new Random();
        double[] dataArray = new double[arrayLength];
        for(i = 0; i < arrayLength; i++)
        {
            dataArray[i] = 100.1 * randomGenerator.NextDouble();
        }

        using(BinaryWriter binWriter =
            new BinaryWriter(new MemoryStream()))
        {
            // Write the data to the stream.
            Console.WriteLine("Writing data to the stream.");
            for(i = 0; i < arrayLength; i++)
            {
                binWriter.Write(dataArray[i]);
            }

            // Create a reader using the stream from the writer.
            using(BinaryReader binReader =
                new BinaryReader(binWriter.BaseStream))
            {
                try
                {
                    // Return to the beginning of the stream.
                    binReader.BaseStream.Position = 0;

                    // Read and verify the data.
                    Console.WriteLine("Verifying the written data.");
                    for(i = 0; i < arrayLength; i++)
                    {
                        if(binReader.ReadDouble() != dataArray[i])
                        {
                            Console.WriteLine("Error writing data.");
                            break;
                        }
                    }
                    Console.WriteLine("The data was written " +
                        "and verified.");
                }
                catch(EndOfStreamException e)
                {
                    Console.WriteLine("Error writing data: {0}.",
                        e.GetType().Name);
                }
            }
        }
    }
}

open System
open System.IO

let arrayLength = 1000

// Create random data to write to the stream.
let randomGenerator = Random()
let dataArray = 
    Array.init arrayLength (fun _ -> 100.1 * randomGenerator.NextDouble())
do
    use binWriter = new BinaryWriter(new MemoryStream())
    // Write the data to the stream.
    printfn $"Writing data to the stream."
    for num in dataArray do
        binWriter.Write num

    // Create a reader using the stream from the writer.
    use binReader = new BinaryReader(binWriter.BaseStream)
    try
        // Return to the beginning of the stream.
        binReader.BaseStream.Position <- 0

        // Read and verify the data.
        printfn "Verifying the written data."
        for num in dataArray do
            if binReader.ReadDouble() <> num then
                printfn "Error writing data."
        printfn "The data was written and verified."
    with :? EndOfStreamException as e ->
        printfn $"Error writing data: {e.GetType().Name}."

Imports System.IO

Public Class BinaryRW

    Shared Sub Main()
    
        Dim i As Integer
        Const upperBound As Integer = 1000

        ' Create random data to write to the stream.
        Dim dataArray(upperBound) As Double
        Dim randomGenerator As New Random()
        For i = 0 To upperBound
            dataArray(i) = 100.1 * randomGenerator.NextDouble()
        Next i

        Dim binWriter As New BinaryWriter(New MemoryStream())
        Try

            ' Write data to the stream.
            Console.WriteLine("Writing data to the stream.")
            
            For i = 0 To upperBound
                binWriter.Write(dataArray(i))
            Next i

            ' Create a reader using the stream from the writer.
            Dim binReader As New BinaryReader(binWriter.BaseStream)

            ' Return to the beginning of the stream.
            binReader.BaseStream.Position = 0

            ' Read and verify the data.
            Try
                Console.WriteLine("Verifying the written data.")
                For i = 0 To upperBound
                    If binReader.ReadDouble() <> dataArray(i) Then
                        Console.WriteLine("Error writing data.")
                        Exit For
                    End If
                Next i
                Console.WriteLine("The data was written and verified.")
            Catch ex As EndOfStreamException
                Console.WriteLine("Error writing data: {0}.", _
                    ex.GetType().Name)
            End Try
        Finally
            binWriter.Close()
        End Try

    End Sub
End Class

Kommentarer

En lista över vanliga I/O-uppgifter finns i Vanliga I/O-uppgifter.

Se även

• Fil- och ström-I/O
• Anvisningar: Läsa text från en fil
• Anvisningar: Skriva text till en fil

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

public:
 virtual void Write(double value);

public virtual void Write(double value);

abstract member Write : double -> unit
override this.Write : double -> unit

Public Overridable Sub Write (value As Double)

Parametrar

Undantag

Exempel

I följande kodexempel visas hur du läser och skriver Double data till minnet med hjälp BinaryReader av klasserna och BinaryWriter ovanpå MemoryStream klassen. MemoryStream läser och skriver Byte endast data.

using System;
using System.IO;

class BinaryRW
{
    static void Main()
    {
        int i;
        const int arrayLength = 1000;

        // Create random data to write to the stream.
        Random randomGenerator = new Random();
        double[] dataArray = new double[arrayLength];
        for(i = 0; i < arrayLength; i++)
        {
            dataArray[i] = 100.1 * randomGenerator.NextDouble();
        }

        using(BinaryWriter binWriter =
            new BinaryWriter(new MemoryStream()))
        {
            // Write the data to the stream.
            Console.WriteLine("Writing data to the stream.");
            for(i = 0; i < arrayLength; i++)
            {
                binWriter.Write(dataArray[i]);
            }

            // Create a reader using the stream from the writer.
            using(BinaryReader binReader =
                new BinaryReader(binWriter.BaseStream))
            {
                try
                {
                    // Return to the beginning of the stream.
                    binReader.BaseStream.Position = 0;

                    // Read and verify the data.
                    Console.WriteLine("Verifying the written data.");
                    for(i = 0; i < arrayLength; i++)
                    {
                        if(binReader.ReadDouble() != dataArray[i])
                        {
                            Console.WriteLine("Error writing data.");
                            break;
                        }
                    }
                    Console.WriteLine("The data was written " +
                        "and verified.");
                }
                catch(EndOfStreamException e)
                {
                    Console.WriteLine("Error writing data: {0}.",
                        e.GetType().Name);
                }
            }
        }
    }
}

open System
open System.IO

let arrayLength = 1000

// Create random data to write to the stream.
let randomGenerator = Random()
let dataArray = 
    Array.init arrayLength (fun _ -> 100.1 * randomGenerator.NextDouble())
do
    use binWriter = new BinaryWriter(new MemoryStream())
    // Write the data to the stream.
    printfn $"Writing data to the stream."
    for num in dataArray do
        binWriter.Write num

    // Create a reader using the stream from the writer.
    use binReader = new BinaryReader(binWriter.BaseStream)
    try
        // Return to the beginning of the stream.
        binReader.BaseStream.Position <- 0

        // Read and verify the data.
        printfn "Verifying the written data."
        for num in dataArray do
            if binReader.ReadDouble() <> num then
                printfn "Error writing data."
        printfn "The data was written and verified."
    with :? EndOfStreamException as e ->
        printfn $"Error writing data: {e.GetType().Name}."

Imports System.IO

Public Class BinaryRW

    Shared Sub Main()
    
        Dim i As Integer
        Const upperBound As Integer = 1000

        ' Create random data to write to the stream.
        Dim dataArray(upperBound) As Double
        Dim randomGenerator As New Random()
        For i = 0 To upperBound
            dataArray(i) = 100.1 * randomGenerator.NextDouble()
        Next i

        Dim binWriter As New BinaryWriter(New MemoryStream())
        Try

            ' Write data to the stream.
            Console.WriteLine("Writing data to the stream.")
            
            For i = 0 To upperBound
                binWriter.Write(dataArray(i))
            Next i

            ' Create a reader using the stream from the writer.
            Dim binReader As New BinaryReader(binWriter.BaseStream)

            ' Return to the beginning of the stream.
            binReader.BaseStream.Position = 0

            ' Read and verify the data.
            Try
                Console.WriteLine("Verifying the written data.")
                For i = 0 To upperBound
                    If binReader.ReadDouble() <> dataArray(i) Then
                        Console.WriteLine("Error writing data.")
                        Exit For
                    End If
                Next i
                Console.WriteLine("The data was written and verified.")
            Catch ex As EndOfStreamException
                Console.WriteLine("Error writing data: {0}.", _
                    ex.GetType().Name)
            End Try
        Finally
            binWriter.Close()
        End Try

    End Sub
End Class

Kommentarer

En lista över vanliga I/O-uppgifter finns i Vanliga I/O-uppgifter.

Se även

• Fil- och ström-I/O
• Anvisningar: Läsa text från en fil
• Anvisningar: Skriva text till en fil

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

public:
 virtual void Write(System::Decimal value);

public virtual void Write(decimal value);

abstract member Write : decimal -> unit
override this.Write : decimal -> unit

Public Overridable Sub Write (value As Decimal)

Parametrar

Undantag

Kommentarer

I följande tabell visas exempel på andra typiska eller relaterade I/O-uppgifter.

Se även

• Fil- och ström-I/O
• Anvisningar: Läsa text från en fil
• Anvisningar: Skriva text till en fil

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

public:
 virtual void Write(char ch);

public virtual void Write(char ch);

abstract member Write : char -> unit
override this.Write : char -> unit

Public Overridable Sub Write (ch As Char)

Parametrar

Undantag

Exempel

Följande kodexempel visar hur du läser och skriver data med hjälp av minne som ett lagringsplats för säkerhetskopiering.

using System;
using System.IO;

class BinaryRW
{
    static void Main()
    {
        int i = 0;
        char[] invalidPathChars = Path.InvalidPathChars;
        MemoryStream memStream = new MemoryStream();
        BinaryWriter binWriter = new BinaryWriter(memStream);

        // Write to memory.
        binWriter.Write("Invalid file path characters are: ");
        for(i = 0; i < invalidPathChars.Length; i++)
        {
            binWriter.Write(invalidPathChars[i]);
        }

        // Create the reader using the same MemoryStream
        // as used with the writer.
        BinaryReader binReader = new BinaryReader(memStream);

        // Set Position to the beginning of the stream.
        memStream.Position = 0;

        // Read the data from memory and write it to the console.
        Console.Write(binReader.ReadString());
        char[] memoryData =
            new char[memStream.Length - memStream.Position];
        for(i = 0; i < memoryData.Length; i++)
        {
            memoryData[i] = binReader.ReadChar();
        }
        Console.WriteLine(memoryData);
    }
}

open System.IO

let invalidPathChars = Path.GetInvalidPathChars()
let memStream = new MemoryStream()
let binWriter = new BinaryWriter(memStream)

// Write to memory.
binWriter.Write "Invalid file path characters are: "
for i = 0 to invalidPathChars.Length - 1 do
    binWriter.Write invalidPathChars[i]

// Create the reader using the same MemoryStream
// as used with the writer.
let binReader = new BinaryReader(memStream)

// Set Position to the beginning of the stream.
memStream.Position <- 0

// Read the data from memory and write it to the console.
printf $"{binReader.ReadString()}"
let memoryData = Array.zeroCreate<char> (int (memStream.Length - memStream.Position))
for i = 0 to memoryData.Length - 1 do
    memoryData[i] <- binReader.ReadChar()
printfn $"{memoryData}"

Imports System.IO

Public Class BinaryRW

    Shared Sub Main()
    
        Dim i As Integer = 0
        Dim invalidPathChars() As Char = Path.InvalidPathChars
        Dim memStream As new MemoryStream()
        Dim binWriter As New BinaryWriter(memStream)

        ' Write to memory.
        binWriter.Write("Invalid file path characters are: ")
        For i = 0 To invalidPathChars.Length - 1
            binWriter.Write(invalidPathChars(i))
        Next i

        ' Create the reader using the same MemoryStream 
        ' as used with the writer.
        Dim binReader As New BinaryReader(memStream)

        ' Set Position to the beginning of the stream.
        memStream.Position = 0

        ' Read the data from memory and write it to the console.
        Console.Write(binReader.ReadString())
        Dim memoryData( _
            CInt(memStream.Length - memStream.Position) - 1) As Char
        For i = 0 To memoryData.Length - 1
            memoryData(i) = binReader.ReadChar()
        Next i
        Console.WriteLine(memoryData)
    
    End Sub
End Class

Kommentarer

På grund av dataformateringskonflikter rekommenderas inte användning av den här metoden med följande kodningar:

• UTF-7

• ISO-2022-JP

• ISCII

En lista över vanliga I/O-uppgifter finns i Vanliga I/O-uppgifter.

Unicode-surrogattecken måste skrivas ut som par tillsammans i samma anrop, inte individuellt. Om du behöver stöd för surrogatpar i ditt program kan du överväga att använda en teckenmatris och Write metodens överlagring.

Se även

• Encoding
• Fil- och ström-I/O
• Anvisningar: Läsa text från en fil
• Anvisningar: Skriva text till en fil

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

public:
 virtual void Write(cli::array <System::Byte> ^ buffer);

public virtual void Write(byte[] buffer);

abstract member Write : byte[] -> unit
override this.Write : byte[] -> unit

Public Overridable Sub Write (buffer As Byte())

Parametrar

Undantag

Exempel

I följande kodexempel visas hur du skriver binära data med hjälp av minne som ett lagringslager och sedan kontrollerar att data har skrivits korrekt.

using System;
using System.IO;

class BinaryRW
{
    static void Main()
    {
        const int arrayLength = 1000;

        // Create random data to write to the stream.
        byte[] dataArray = new byte[arrayLength];
        new Random().NextBytes(dataArray);

        BinaryWriter binWriter = new BinaryWriter(new MemoryStream());

        // Write the data to the stream.
        Console.WriteLine("Writing the data.");
        binWriter.Write(dataArray);

        // Create the reader using the stream from the writer.
        BinaryReader binReader =
            new BinaryReader(binWriter.BaseStream);

        // Set Position to the beginning of the stream.
        binReader.BaseStream.Position = 0;

        // Read and verify the data.
        byte[] verifyArray = binReader.ReadBytes(arrayLength);
        if(verifyArray.Length != arrayLength)
        {
            Console.WriteLine("Error writing the data.");
            return;
        }
        for(int i = 0; i < arrayLength; i++)
        {
            if(verifyArray[i] != dataArray[i])
            {
                Console.WriteLine("Error writing the data.");
                return;
            }
        }
        Console.WriteLine("The data was written and verified.");
    }
}

open System
open System.IO

let arrayLength = 1000

// Create random data to write to the stream.
let dataArray = Array.zeroCreate<byte> arrayLength
Random().NextBytes dataArray

let binWriter = new BinaryWriter(new MemoryStream())

// Write the data to the stream.ch
printfn "Writing the data."
binWriter.Write dataArray

// Create the reader using the stream from the writer.
let binReader = new BinaryReader(binWriter.BaseStream)

// Set Position to the beginning of the stream.
binReader.BaseStream.Position <- 0

// Read and verify the data.
let verifyArray = binReader.ReadBytes arrayLength
if verifyArray.Length <> arrayLength then
    printfn "Error writing the data."
else
    let mutable failed = false
    for i = 0 to arrayLength - 1 do
        if verifyArray[i] <> dataArray[i] then
            printfn "Error writing the data."
            failed <- true
    if not failed then
        printfn "The data was written and verified."

Imports System.IO

Public Class BinaryRW

    Shared Sub Main()
    
        Const upperBound As Integer = 1000

        ' Create random data to write to the stream.
        Dim dataArray(upperBound) As Byte
        Dim randomGenerator As New Random
        randomGenerator.NextBytes(dataArray)

        Dim binWriter As New BinaryWriter(New MemoryStream())

        ' Write the data to the stream.
        Console.WriteLine("Writing the data.")
        binWriter.Write(dataArray)

        ' Create the reader using the stream from the writer.
        Dim binReader As New BinaryReader(binWriter.BaseStream)

        ' Set the stream position to the beginning of the stream.
        binReader.BaseStream.Position = 0

        ' Read and verify the data.
        Dim verifyArray() As Byte = _
            binReader.ReadBytes(dataArray.Length)
        If verifyArray.Length <> dataArray.Length Then
            Console.WriteLine("Error writing the data.")
            Return
        End If
        For i As Integer = 0 To upperBound
            If verifyArray(i) <> dataArray(i) Then
                Console.WriteLine("Error writing the data.")
                Return
            End If
        Next i
        Console.WriteLine("The data was written and verified.")
    
    End Sub
End Class

Kommentarer

En lista över vanliga I/O-uppgifter finns i Vanliga I/O-uppgifter.

Se även

• Fil- och ström-I/O
• Anvisningar: Läsa text från en fil
• Anvisningar: Skriva text till en fil

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

public:
 virtual void Write(System::Byte value);

public virtual void Write(byte value);

abstract member Write : byte -> unit
override this.Write : byte -> unit

Public Overridable Sub Write (value As Byte)

Parametrar

Undantag

Exempel

I följande kodexempel visas hur du skriver binära data med hjälp av minne som ett lagringslager och sedan kontrollerar att data har skrivits korrekt.

using System;
using System.IO;

class BinaryRW
{
    static void Main()
    {
        int i = 0;

        // Create random data to write to the stream.
        byte[] writeArray = new byte[1000];
        new Random().NextBytes(writeArray);

        BinaryWriter binWriter = new BinaryWriter(new MemoryStream());
        BinaryReader binReader =
            new BinaryReader(binWriter.BaseStream);

        try
        {
            // Write the data to the stream.
            Console.WriteLine("Writing the data.");
            for(i = 0; i < writeArray.Length; i++)
            {
                binWriter.Write(writeArray[i]);
            }

            // Set the stream position to the beginning of the stream.
            binReader.BaseStream.Position = 0;

            // Read and verify the data from the stream.
            for(i = 0; i < writeArray.Length; i++)
            {
                if(binReader.ReadByte() != writeArray[i])
                {
                    Console.WriteLine("Error writing the data.");
                    return;
                }
            }
            Console.WriteLine("The data was written and verified.");
        }

        // Catch the EndOfStreamException and write an error message.
        catch(EndOfStreamException e)
        {
            Console.WriteLine("Error writing the data.\n{0}",
                e.GetType().Name);
        }
    }
}

open System
open System.IO

// Create random data to write to the stream.
let writeArray = Array.zeroCreate<byte> 1000
Random().NextBytes writeArray

let binWriter = new BinaryWriter(new MemoryStream())
let binReader = new BinaryReader(binWriter.BaseStream)

try
    // Write the data to the stream.
    printfn "Writing the data."
    for i = 0 to writeArray.Length - 1 do
        binWriter.Write writeArray[i]

    // Set the stream position to the beginning of the stream.
    binReader.BaseStream.Position <- 0

    let mutable failed = false
    // Read and verify the data from the stream.
    for i = 0 to writeArray.Length - 1 do
        if binReader.ReadByte() <> writeArray[i] then
            printfn "Error writing the data."
            failed <- true
    if not failed then
        printfn "The data was written and verified."

// Catch the EndOfStreamException and write an error message.
with :? EndOfStreamException as e ->
    printfn $"Error writing the data.\n{e.GetType().Name}"

Imports System.IO

Public Class BinaryRW

    Shared Sub Main()
    
        Dim i As Integer = 0

        ' Create random data to write to the stream.
        Dim writeArray(1000) As Byte
        Dim randomGenerator As New Random()
        randomGenerator.NextBytes(writeArray)

        Dim binWriter As New BinaryWriter(New MemoryStream())
        Dim binReader As New BinaryReader(binWriter.BaseStream)

        Try
        
            ' Write the data to the stream.
            Console.WriteLine("Writing the data.")
            For i = 0 To writeArray.Length - 1
                binWriter.Write(writeArray(i))
            Next i

            ' Set the stream position to the beginning of the stream.
            binReader.BaseStream.Position = 0

            ' Read and verify the data from the stream.
            For i = 0 To writeArray.Length - 1
                If binReader.ReadByte() <> writeArray(i) Then
                    Console.WriteLine("Error writing the data.")
                    Return
                End If
            Next i
            Console.WriteLine("The data was written and verified.")

        ' Catch the EndOfStreamException and write an error message.
        Catch ex As EndOfStreamException
            Console.WriteLine("Error writing the data: {0}", _
                ex.GetType().Name)
        End Try
    
    End Sub
End Class

Kommentarer

På grund av dataformateringskonflikter rekommenderas inte användning av den här metoden med följande kodningar:

• UTF-7

• ISO-2022-JP

• ISCII

En lista över vanliga I/O-uppgifter finns i Vanliga I/O-uppgifter.

Se även

• Fil- och ström-I/O
• Anvisningar: Läsa text från en fil
• Anvisningar: Skriva text till en fil

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

public:
 virtual void Write(bool value);

public virtual void Write(bool value);

abstract member Write : bool -> unit
override this.Write : bool -> unit

Public Overridable Sub Write (value As Boolean)

Parametrar

Undantag

Exempel

Följande kodexempel visar hur du lagrar och hämtar programinställningar i en fil.

using System;
using System.IO;
using System.Text;

class ConsoleApplication
{
    const string fileName = "AppSettings.dat";

    static void Main()
    {
        WriteDefaultValues();
        DisplayValues();
    }

    public static void WriteDefaultValues()
    {
        using (var stream = File.Open(fileName, FileMode.Create))
        {
            using (var writer = new BinaryWriter(stream, Encoding.UTF8, false))
            {
                writer.Write(1.250F);
                writer.Write(@"c:\Temp");
                writer.Write(10);
                writer.Write(true);
            }
        }
    }

    public static void DisplayValues()
    {
        float aspectRatio;
        string tempDirectory;
        int autoSaveTime;
        bool showStatusBar;

        if (File.Exists(fileName))
        {
            using (var stream = File.Open(fileName, FileMode.Open))
            {
                using (var reader = new BinaryReader(stream, Encoding.UTF8, false))
                {
                    aspectRatio = reader.ReadSingle();
                    tempDirectory = reader.ReadString();
                    autoSaveTime = reader.ReadInt32();
                    showStatusBar = reader.ReadBoolean();
                }
            }

            Console.WriteLine("Aspect ratio set to: " + aspectRatio);
            Console.WriteLine("Temp directory is: " + tempDirectory);
            Console.WriteLine("Auto save time set to: " + autoSaveTime);
            Console.WriteLine("Show status bar: " + showStatusBar);
        }
    }
}

open System.IO
open System.Text

let fileName = "AppSettings.dat"

let writeDefaultValues () =
    use stream = File.Open(fileName, FileMode.Create)
    use writer = new BinaryWriter(stream, Encoding.UTF8, false)
    writer.Write 1.250F
    writer.Write @"c:\Temp"
    writer.Write 10
    writer.Write true

let displayValues () =
    if File.Exists fileName then
        use stream = File.Open(fileName, FileMode.Open)
        use reader = new BinaryReader(stream, Encoding.UTF8, false)
        let aspectRatio = reader.ReadSingle()
        let tempDirectory = reader.ReadString()
        let autoSaveTime = reader.ReadInt32()
        let showStatusBar = reader.ReadBoolean()

        printfn $"Aspect ratio set to: {aspectRatio}"
        printfn $"Temp directory is: {tempDirectory}"
        printfn $"Auto save time set to: {autoSaveTime}"
        printfn $"Show status bar: {showStatusBar}"

writeDefaultValues ()
displayValues ()

Imports System.IO

Module Module1
    Const fileName As String = "AppSettings.dat"

    Sub Main()
        WriteDefaultValues()
        DisplayValues()
    End Sub

    Sub WriteDefaultValues()
        Using writer As BinaryWriter = New BinaryWriter(File.Open(fileName, FileMode.Create))
            writer.Write(1.25F)
            writer.Write("c:\Temp")
            writer.Write(10)
            writer.Write(True)
        End Using
    End Sub

    Sub DisplayValues()
        Dim aspectRatio As Single
        Dim tempDirectory As String
        Dim autoSaveTime As Integer
        Dim showStatusBar As Boolean

        If (File.Exists(fileName)) Then

            Using reader As BinaryReader = New BinaryReader(File.Open(fileName, FileMode.Open))
                aspectRatio = reader.ReadSingle()
                tempDirectory = reader.ReadString()
                autoSaveTime = reader.ReadInt32()
                showStatusBar = reader.ReadBoolean()
            End Using

            Console.WriteLine("Aspect ratio set to: " & aspectRatio)
            Console.WriteLine("Temp directory is: " & tempDirectory)
            Console.WriteLine("Auto save time set to: " & autoSaveTime)
            Console.WriteLine("Show status bar: " & showStatusBar)
        End If
    End Sub

End Module

Kommentarer

En lista över vanliga I/O-uppgifter finns i Vanliga I/O-uppgifter.

Se även

• Fil- och ström-I/O
• Anvisningar: Läsa text från en fil
• Anvisningar: Skriva text till en fil

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

Källa:

BinaryWriter.cs

public:
 virtual void Write(int value);

public virtual void Write(int value);

abstract member Write : int -> unit
override this.Write : int -> unit

Public Overridable Sub Write (value As Integer)

Parametrar

Undantag

Exempel

Följande kodexempel visar hur du lagrar och hämtar programinställningar i en fil.

using System;
using System.IO;
using System.Text;

class ConsoleApplication
{
    const string fileName = "AppSettings.dat";

    static void Main()
    {
        WriteDefaultValues();
        DisplayValues();
    }

    public static void WriteDefaultValues()
    {
        using (var stream = File.Open(fileName, FileMode.Create))
        {
            using (var writer = new BinaryWriter(stream, Encoding.UTF8, false))
            {
                writer.Write(1.250F);
                writer.Write(@"c:\Temp");
                writer.Write(10);
                writer.Write(true);
            }
        }
    }

    public static void DisplayValues()
    {
        float aspectRatio;
        string tempDirectory;
        int autoSaveTime;
        bool showStatusBar;

        if (File.Exists(fileName))
        {
            using (var stream = File.Open(fileName, FileMode.Open))
            {
                using (var reader = new BinaryReader(stream, Encoding.UTF8, false))
                {
                    aspectRatio = reader.ReadSingle();
                    tempDirectory = reader.ReadString();
                    autoSaveTime = reader.ReadInt32();
                    showStatusBar = reader.ReadBoolean();
                }
            }

            Console.WriteLine("Aspect ratio set to: " + aspectRatio);
            Console.WriteLine("Temp directory is: " + tempDirectory);
            Console.WriteLine("Auto save time set to: " + autoSaveTime);
            Console.WriteLine("Show status bar: " + showStatusBar);
        }
    }
}

open System.IO
open System.Text

let fileName = "AppSettings.dat"

let writeDefaultValues () =
    use stream = File.Open(fileName, FileMode.Create)
    use writer = new BinaryWriter(stream, Encoding.UTF8, false)
    writer.Write 1.250F
    writer.Write @"c:\Temp"
    writer.Write 10
    writer.Write true

let displayValues () =
    if File.Exists fileName then
        use stream = File.Open(fileName, FileMode.Open)
        use reader = new BinaryReader(stream, Encoding.UTF8, false)
        let aspectRatio = reader.ReadSingle()
        let tempDirectory = reader.ReadString()
        let autoSaveTime = reader.ReadInt32()
        let showStatusBar = reader.ReadBoolean()

        printfn $"Aspect ratio set to: {aspectRatio}"
        printfn $"Temp directory is: {tempDirectory}"
        printfn $"Auto save time set to: {autoSaveTime}"
        printfn $"Show status bar: {showStatusBar}"

writeDefaultValues ()
displayValues ()

Imports System.IO

Module Module1
    Const fileName As String = "AppSettings.dat"

    Sub Main()
        WriteDefaultValues()
        DisplayValues()
    End Sub

    Sub WriteDefaultValues()
        Using writer As BinaryWriter = New BinaryWriter(File.Open(fileName, FileMode.Create))
            writer.Write(1.25F)
            writer.Write("c:\Temp")
            writer.Write(10)
            writer.Write(True)
        End Using
    End Sub

    Sub DisplayValues()
        Dim aspectRatio As Single
        Dim tempDirectory As String
        Dim autoSaveTime As Integer
        Dim showStatusBar As Boolean

        If (File.Exists(fileName)) Then

            Using reader As BinaryReader = New BinaryReader(File.Open(fileName, FileMode.Open))
                aspectRatio = reader.ReadSingle()
                tempDirectory = reader.ReadString()
                autoSaveTime = reader.ReadInt32()
                showStatusBar = reader.ReadBoolean()
            End Using

            Console.WriteLine("Aspect ratio set to: " & aspectRatio)
            Console.WriteLine("Temp directory is: " & tempDirectory)
            Console.WriteLine("Auto save time set to: " & autoSaveTime)
            Console.WriteLine("Show status bar: " & showStatusBar)
        End If
    End Sub

End Module

Kommentarer

BinaryWriter lagrar den här datatypen i lite endianskt format.

En lista över vanliga I/O-uppgifter finns i Vanliga I/O-uppgifter.

Se även

• Fil- och ström-I/O
• Anvisningar: Läsa text från en fil
• Anvisningar: Skriva text till en fil