RegistryKey.GetValue Methode

Quelle:

RegistryKey.cs

public:
 System::Object ^ GetValue(System::String ^ name, System::Object ^ defaultValue, Microsoft::Win32::RegistryValueOptions options);

public object? GetValue(string? name, object? defaultValue, Microsoft.Win32.RegistryValueOptions options);

public object GetValue(string name, object defaultValue, Microsoft.Win32.RegistryValueOptions options);

[System.Runtime.InteropServices.ComVisible(false)]
public object GetValue(string name, object defaultValue, Microsoft.Win32.RegistryValueOptions options);

member this.GetValue : string * obj * Microsoft.Win32.RegistryValueOptions -> obj

[<System.Runtime.InteropServices.ComVisible(false)>]
member this.GetValue : string * obj * Microsoft.Win32.RegistryValueOptions -> obj

Public Function GetValue (name As String, defaultValue As Object, options As RegistryValueOptions) As Object

Parameter

Gibt zurück

Der wert name, der gemäß der angegebenen optionsverarbeitet wird oder defaultValue nicht name gefunden wird.

Attribute

ComVisibleAttribute

Ausnahmen

Beispiele

Im folgenden Codebeispiel wird ein Testschlüssel erstellt, ein Wert mit einer eingebetteten Umgebungsvariable hinzugefügt und der Wert in erweiterten und nicht erweiterten Formularen abgerufen.

#using <Microsoft.VisualBasic.dll>

using namespace System;
using namespace Microsoft::Win32;
using namespace Microsoft::VisualBasic;

int main()
{
    // Delete and recreate the test key.
    Registry::CurrentUser->DeleteSubKey( L"RegistryValueOptionsExample", false );
    RegistryKey ^ rk = 
        Registry::CurrentUser->CreateSubKey( L"RegistryValueOptionsExample" );
   
    // Add a value that contains an environment variable.
    rk->SetValue( L"ExpandValue", L"The path is %PATH%", 
        RegistryValueKind::ExpandString );
   
    // Retrieve the value, first without expanding the environment
    // variable and then expanding it.
    Console::WriteLine( L"Unexpanded: \"{0}\"", 
                        rk->GetValue( L"ExpandValue", 
                        L"No Value", 
                        RegistryValueOptions::DoNotExpandEnvironmentNames ) );
    Console::WriteLine( L"Expanded: \"{0}\"", rk->GetValue( L"ExpandValue" ) );
 
    return 0;
} //Main

using System;
using Microsoft.Win32;
using Microsoft.VisualBasic;

public class Example
{
    public static void Main()
    {
        // Delete and recreate the test key.
        Registry.CurrentUser.DeleteSubKey("RegistryValueOptionsExample", false);
        RegistryKey rk =
            Registry.CurrentUser.CreateSubKey("RegistryValueOptionsExample");

        // Add a value that contains an environment variable.
        rk.SetValue("ExpandValue", "The path is %PATH%", RegistryValueKind.ExpandString);

        // Retrieve the value, first without expanding the environment
        // variable and then expanding it.
        Console.WriteLine("Unexpanded: \"{0}\"",
            rk.GetValue("ExpandValue", "No Value",
            RegistryValueOptions.DoNotExpandEnvironmentNames));
        Console.WriteLine("Expanded: \"{0}\"", rk.GetValue("ExpandValue"));
    } //Main
} //Example

Imports Microsoft.Win32

Public Class Example
    Public Shared Sub Main()
        ' Delete and recreate the test key.
        Registry.CurrentUser.DeleteSubKey("RegistryValueOptionsExample", False)
        Dim rk As RegistryKey = _
            Registry.CurrentUser.CreateSubKey("RegistryValueOptionsExample")

        ' Add a value that contains an environment variable.
        rk.SetValue("ExpandValue", "The path is %PATH%", _
            RegistryValueKind.ExpandString)

        ' Retrieve the value, first without expanding the environment 
        ' variable and then expanding it.
        Console.WriteLine("Unexpanded: ""{0}""", _
            rk.GetValue("ExpandValue", "No Value", _
            RegistryValueOptions.DoNotExpandEnvironmentNames))
        Console.WriteLine("Expanded: ""{0}""", rk.GetValue("ExpandValue"))
    End Sub
End Class

Hinweise

Verwenden Sie diese Überladung, um eine spezielle Verarbeitung des abgerufenen Werts anzugeben. Sie können beispielsweise angeben RegistryValueOptions.DoNotExpandEnvironmentNames , wenn Sie einen Registrierungswert vom Typ RegistryValueKind.ExpandString abrufen, um die Zeichenfolge abzurufen, ohne eingebettete Umgebungsvariablen zu erweitern.

Verwenden Sie den defaultValue Parameter, um den wert anzugeben, der zurückgegeben werden soll, wenn name er nicht vorhanden ist.

Weitere Informationen

• RegistryValueOptions
• GetValueNames()
• SetValue
• DeleteValue(String)
• ValueCount
• GetSubKeyNames()

Quelle:

RegistryKey.cs

public:
 System::Object ^ GetValue(System::String ^ name);

public object? GetValue(string? name);

public object GetValue(string name);

member this.GetValue : string -> obj

Public Function GetValue (name As String) As Object

Parameter

Gibt zurück

Der wert, nameder bzw null . dem name nicht gefunden wird.

Ausnahmen

Beispiele

Im folgenden Codebeispiel wird ein Testschlüssel erstellt und dem Schlüssel Werte verschiedener Datentypen hinzugefügt. Anschließend liest das Beispiel die Namen-Wert-Paare und zeigt sie in der Konsole an, wobei die GetValueKind Methode zum Abrufen der entsprechenden Registrierungsdatentypen verwendet wird.

using namespace System;
using namespace Microsoft::Win32;
int main()
{
   
   // Delete and recreate the test key.
   Registry::CurrentUser->DeleteSubKey( "RegistryValueKindExample", false );
   RegistryKey ^ rk = Registry::CurrentUser->CreateSubKey( "RegistryValueKindExample" );
   
   // Create name/value pairs.
   // This overload supports QWord (long) values. 
   rk->SetValue( "QuadWordValue", 42, RegistryValueKind::QWord );
   
   // The following SetValue calls have the same effect as using the
   // SetValue overload that does not specify RegistryValueKind.
   //
   rk->SetValue( "DWordValue", 42, RegistryValueKind::DWord );
   rk->SetValue( "MultipleStringValue", gcnew array<String^>{
      "One","Two","Three"
   }, RegistryValueKind::MultiString );
   rk->SetValue( "BinaryValue", gcnew array<Byte>{
      10,43,44,45,14,255
   }, RegistryValueKind::Binary );
   rk->SetValue( "StringValue", "The path is %PATH%", RegistryValueKind::String );
   
   // This overload supports setting expandable string values. Compare
   // the output from this value with the previous string value.
   rk->SetValue( "ExpandedStringValue", "The path is %PATH%", RegistryValueKind::ExpandString );
   
   // Display all the name/value pairs stored in the test key, with the
   // registry data type in parentheses.
   //
   array<String^>^valueNames = rk->GetValueNames();
   System::Collections::IEnumerator^ myEnum = valueNames->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      String^ s = safe_cast<String^>(myEnum->Current);
      RegistryValueKind rvk = rk->GetValueKind( s );
      switch ( rvk )
      {
         case RegistryValueKind::MultiString:
         {
            array<String^>^values = (array<String^>^)rk->GetValue( s );
            Console::Write( "\r\n {0} ({1}) =", s, rvk );
            for ( int i = 0; i < values->Length; i++ )
            {
               if (i != 0) Console::Write(",");
               Console::Write( " \"{0}\"", values[ i ] );

            }
            Console::WriteLine();
            break;
         }
         case RegistryValueKind::Binary:
         {
            array<Byte>^bytes = (array<Byte>^)rk->GetValue( s );
            Console::Write( "\r\n {0} ({1}) =", s, rvk );
            for ( int i = 0; i < bytes->Length; i++ )
            {
               
               // Display each byte as two hexadecimal digits.
               Console::Write( " {0:X2}", bytes[ i ] );

            }
            Console::WriteLine();
            break;
         }
         default:
            Console::WriteLine( "\r\n {0} ({1}) = {2}", s, rvk, rk->GetValue( s ) );
            break;
      }
   }
}
/*

This code example produces the following output:
 QuadWordValue (QWord) = 42

 DWordValue (DWord) = 42

 MultipleStringValue (MultiString) =, "One", "Two", "Three"

 BinaryValue (Binary) = 0A 2B 2C 2D 0E FF

 StringValue (String) = The path is %PATH%

 ExpandedStringValue (ExpandString) = The path is C:\Program Files\Microsoft.NET\SDK\v2.0\Bin;
 [***The remainder of this output is omitted.***]

*/

using System;
using Microsoft.Win32;

public class Example
{
    public static void Main()
    {
        // Delete and recreate the test key.
        Registry.CurrentUser.DeleteSubKey("RegistryValueKindExample", false);
        RegistryKey rk = Registry.CurrentUser.CreateSubKey("RegistryValueKindExample");

        // Create name/value pairs.

        // This overload supports QWord (long) values.
        rk.SetValue("QuadWordValue", 42, RegistryValueKind.QWord);

        // The following SetValue calls have the same effect as using the
        // SetValue overload that does not specify RegistryValueKind.
        //
        rk.SetValue("DWordValue", 42, RegistryValueKind.DWord);
        rk.SetValue("MultipleStringValue", new string[] {"One", "Two", "Three"}, RegistryValueKind.MultiString);
        rk.SetValue("BinaryValue", new byte[] {10, 43, 44, 45, 14, 255}, RegistryValueKind.Binary);
        rk.SetValue("StringValue", "The path is %PATH%", RegistryValueKind.String);

        // This overload supports setting expandable string values. Compare
        // the output from this value with the previous string value.
        rk.SetValue("ExpandedStringValue", "The path is %PATH%", RegistryValueKind.ExpandString);

        // Display all name/value pairs stored in the test key, with each
        // registry data type in parentheses.
        //
        string[] valueNames = rk.GetValueNames();
        foreach (string s in valueNames)
        {
            RegistryValueKind rvk = rk.GetValueKind(s);
            switch (rvk)
            {
                case RegistryValueKind.MultiString :
                    string[] values = (string[]) rk.GetValue(s);
                    Console.Write("\r\n {0} ({1}) =", s, rvk);
                    for (int i = 0; i < values.Length; i++)
                    {
                        if (i != 0) Console.Write(",");
                        Console.Write(" \"{0}\"", values[i]);
                    }
                    Console.WriteLine();
                    break;

                case RegistryValueKind.Binary :
                    byte[] bytes = (byte[]) rk.GetValue(s);
                    Console.Write("\r\n {0} ({1}) =", s, rvk);
                    for (int i = 0; i < bytes.Length; i++)
                    {
                        // Display each byte as two hexadecimal digits.
                        Console.Write(" {0:X2}", bytes[i]);
                    }
                    Console.WriteLine();
                    break;

                default :
                    Console.WriteLine("\r\n {0} ({1}) = {2}", s, rvk, rk.GetValue(s));
                    break;
            }
        }
    }
}
/*

This code example produces the following output:
 QuadWordValue (QWord) = 42

 DWordValue (DWord) = 42

 MultipleStringValue (MultiString) =, "One", "Two", "Three"

 BinaryValue (Binary) = 0A 2B 2C 2D 0E FF

 StringValue (String) = The path is %PATH%

 ExpandedStringValue (ExpandString) = The path is C:\Program Files\Microsoft.NET\SDK\v2.0\Bin;
 [***The remainder of this output is omitted.***]

*/

Imports Microsoft.Win32

Public Class Example
    Public Shared Sub Main()
        ' Delete and recreate the test key.
        Registry.CurrentUser.DeleteSubKey("RegistryValueKindExample", False)
        Dim rk As RegistryKey = Registry.CurrentUser.CreateSubKey("RegistryValueKindExample")

        ' Create name/value pairs.
        ' This overload supports QWord (long) values.
        rk.SetValue("QuadWordValue", 42, RegistryValueKind.QWord)

        ' The following SetValue calls have the same effect as using the
        ' SetValue overload that does not specify RegistryValueKind.
        '
        rk.SetValue("DWordValue", 42, RegistryValueKind.DWord)
        rk.SetValue("MultipleStringValue", New String() {"One", "Two", "Three"}, RegistryValueKind.MultiString)
        rk.SetValue("BinaryValue", New Byte() {10, 43, 44, 45, 14, 255}, RegistryValueKind.Binary)
        rk.SetValue("StringValue", "The path is %PATH%", RegistryValueKind.String)

        ' This overload supports setting expandable string values. Compare
        ' the output from this value with the previous string value.
        rk.SetValue("ExpandedStringValue", "The path is %PATH%", RegistryValueKind.ExpandString)


        ' Display all name/value pairs stored in the test key, with each
        ' registry data type in parentheses.
        '
        Dim valueNames As String() = rk.GetValueNames()
        Dim s As String
        For Each s In  valueNames
            Dim rvk As RegistryValueKind = rk.GetValueKind(s)
            Select Case rvk
                Case RegistryValueKind.MultiString
                    Dim values As String() = CType(rk.GetValue(s), String())
                    Console.Write(vbCrLf & " {0} ({1}) =", s, rvk)
                    For i As Integer = 0 To values.Length - 1
                        If i <> 0 Then Console.Write(",")
                        Console.Write(" ""{0}""", values(i))
                    Next i
                    Console.WriteLine()

                Case RegistryValueKind.Binary
                    Dim bytes As Byte() = CType(rk.GetValue(s), Byte())
                    Console.Write(vbCrLf & " {0} ({1}) =", s, rvk)
                    For i As Integer = 0 To bytes.Length - 1
                        ' Display each byte as two hexadecimal digits.
                        Console.Write(" {0:X2}", bytes(i))
                    Next i
                    Console.WriteLine()

                Case Else
                    Console.WriteLine(vbCrLf & " {0} ({1}) = {2}", s, rvk, rk.GetValue(s))
            End Select
        Next s
    End Sub
End Class

'
'This code example produces the following output (some output is omitted):
'
' QuadWordValue (QWord) = 42
'
' DWordValue (DWord) = 42
'
' MultipleStringValue (MultiString) = "One", "Two", "Three"
'
' BinaryValue (Binary) = 0A 2B 2C 2D 0E FF
'
' StringValue (String) = The path is %PATH%
'
' ExpandedStringValue (ExpandString) = The path is C:\Program Files\Microsoft.NET\SDK\v2.0\Bin;
' [***The remainder of this output is omitted.***]

Hinweise

Wenn die GetValue Methode erweiterbare Zeichenfolgenwerte abruft (RegistryValueKind.ExpandString), erweitert sie Umgebungszeichenfolgen mithilfe von Daten aus der lokalen Umgebung. Um erweiterbare Zeichenfolgenwerte aus der Registrierung auf einem Remotecomputer abzurufen, verwenden Sie die GetValue(String, Object, RegistryValueOptions) Methodenüberladung, um anzugeben, dass Umgebungszeichenfolgen nicht erweitert werden sollen.

Weitere Informationen

• GetValueNames()
• SetValue
• DeleteValue(String)
• ValueCount
• GetSubKeyNames()

Quelle:

RegistryKey.cs

public:
 System::Object ^ GetValue(System::String ^ name, System::Object ^ defaultValue);

public object? GetValue(string? name, object? defaultValue);

public object GetValue(string name, object defaultValue);

member this.GetValue : string * obj -> obj

Public Function GetValue (name As String, defaultValue As Object) As Object

Parameter

Gibt zurück

Der Wert, der allen eingebetteten Umgebungsvariablen zugeordnet nameist, die nicht erweitert wurden oder defaultValue nicht name gefunden wurden.

Ausnahmen

Beispiele

Im folgenden Codebeispiel wird ein Testschlüssel mit einem Wert erstellt und dieser Wert abgerufen. Anschließend wird versucht, einen nicht vorhandenen Wert aus dem Schlüssel abzurufen. in diesem Fall gibt die GetValue Methode den angegebenen Standardwert zurück.

using namespace System;
using namespace Microsoft::Win32;

public ref class RegGetDef
{
public:
    static void Main()
    {
        // Create a reference to a valid key.  In order for this code to
        // work, the indicated key must have been created previously.
        // The key name is not case-sensitive.
        RegistryKey^ rk = Registry::LocalMachine->OpenSubKey("Software\\myTestKey", false);
        // Get the value from the specified name/value pair in the key.
        String^ valueName = "myTestValue";

        Console::WriteLine("Retrieving registry value ...");
        Console::WriteLine();
        Object^ o = rk->GetValue(valueName);
        Console::WriteLine("Object Type = " + o->GetType()->FullName);
        Console::WriteLine();
        switch (rk->GetValueKind(valueName))
        {
            case RegistryValueKind::String:
            case RegistryValueKind::ExpandString:
                Console::WriteLine("Value = " + o);
                break;
            case RegistryValueKind::Binary:
                for each (Byte^ b in (array<Byte^>^)o)
                {
                    Console::Write("{0:x2} ", b);
                }
                Console::WriteLine();
                break;
            case RegistryValueKind::DWord:
                Console::WriteLine("Value = " + Convert::ToString((Int32^)o));
                break;
            case RegistryValueKind::QWord:
                Console::WriteLine("Value = " + Convert::ToString((Int64^)o));
                break;
            case RegistryValueKind::MultiString:
                for each (String^ s in (array<String^>^)o)
                {
                    Console::Write("[{0:s}], ", s);
                }
                Console::WriteLine();
                break;
            default:
                Console::WriteLine("Value = (Unknown)");
                break;
        }

        // Attempt to retrieve a value that does not exist; the specified
        // default value is returned.
        String^ def = (String^)rk->GetValue("notavalue", "The default to return");
        Console::WriteLine();
        Console::WriteLine(def);
        
        rk->Close();
    }
};

int main()
{
    RegGetDef::Main();
}
/*
Output:
Retrieving registry value ...

Object Type = System.String

Value = testData

The default to return
*/

using System;
using Microsoft.Win32;

class RegGetDef
{
    public static void Main()
    {
        // Create a reference to a valid key.  In order for this code to
        // work, the indicated key must have been created previously.
        // The key name is not case-sensitive.
        RegistryKey rk = Registry.LocalMachine.OpenSubKey("Software\\myTestKey", false);
        // Get the value from the specified name/value pair in the key.

        string valueName = "myTestValue";

        Console.WriteLine("Retrieving registry value ...");
        Console.WriteLine();
        object o = rk.GetValue(valueName);
        Console.WriteLine("Object Type = " + o.GetType().FullName);
        Console.WriteLine();
        switch (rk.GetValueKind(valueName))
        {
            case RegistryValueKind.String:
            case RegistryValueKind.ExpandString:
                Console.WriteLine("Value = " + o);
                break;
            case RegistryValueKind.Binary:
                foreach (byte b in (byte[])o)
                {
                    Console.Write("{0:x2} ", b);
                }
                Console.WriteLine();
                break;
            case RegistryValueKind.DWord:
                Console.WriteLine("Value = " + Convert.ToString((int)o));
                break;
            case RegistryValueKind.QWord:
                Console.WriteLine("Value = " + Convert.ToString((Int64)o));
                break;
            case RegistryValueKind.MultiString:
                foreach (string s in (string[])o)
                {
                    Console.Write("[{0:s}], ", s);
                }
                Console.WriteLine();
                break;
            default:
                Console.WriteLine("Value = (Unknown)");
                break;
        }

        // Attempt to retrieve a value that does not exist; the specified
        // default value is returned.
        string def = (string)rk.GetValue("notavalue", "The default to return");
        Console.WriteLine();
        Console.WriteLine(def);

        rk.Close();
    }
}
/*
Output:
Retrieving registry value ...

Object Type = System.String

Value = testData

The default to return
*/

Imports Microsoft.Win32

Public Class RegGetDef
    Public Shared Sub Main()
        ' Create a reference to a valid key.  In order for this code to
        ' work, the indicated key must have been created previously.
        ' The key name is not case-sensitive.
        Dim rk As RegistryKey = Registry.LocalMachine.OpenSubKey("Software\myTestKey", false)

        ' Get the value from the specified name/value pair in the key.
        Dim valueName As String = "myTestValue"

        Console.WriteLine("Retrieving registry value ...")
        Console.WriteLine()
        Dim o As Object = rk.GetValue(valueName)
        Console.WriteLine("Object Type = " + o.GetType().FullName)
        Console.WriteLine()
        Select Case rk.GetValueKind(valueName)
            Case RegistryValueKind.String
            Case RegistryValueKind.ExpandString
                Console.WriteLine("Value = " + o)
            Case RegistryValueKind.Binary
                For Each b As Byte In CType(o,Byte())
                    Console.Write("{0:x2} ", b)
                Next b
                Console.WriteLine()
            Case RegistryValueKind.DWord
                Console.WriteLine("Value = " + Convert.ToString(CType(o,Int32)))
            Case RegistryValueKind.QWord
                Console.WriteLine("Value = " + Convert.ToString(CType(o,Int64)))
            Case RegistryValueKind.MultiString
                For Each s As String In CType(o,String())
                    Console.Write("[{0:s}], ", s)
                Next s
                Console.WriteLine()
            Case Else
                Console.WriteLine("Value = (Unknown)")
        End Select

        ' Attempt to retrieve a value that does not exist; the specified
        ' default value is returned.
        Dim Def As String = rk.GetValue("notavalue", "The default to return")
        Console.WriteLine()
        Console.WriteLine(def)

        rk.Close()
    End Sub
End Class
'
' Output:
' Retrieving registry value ...
'
' Object Type = System.String
'
' Value = testData
'
'The default to return

Hinweise

Verwenden Sie diese Überladung GetValue , um den Fall zu behandeln, in dem noch kein Name vorhanden ist , z. B. das erste Mal, wenn die Anwendung ausgeführt wird. Wenn Sie diese Überladung aufrufen, verwenden Sie den defaultValue Parameter, um den wert anzugeben, der zurückgegeben werden soll, falls name nicht vorhanden.

Wenn die GetValue Methode erweiterbare Zeichenfolgenwerte abruft (RegistryValueKind.ExpandString), erweitert sie Umgebungszeichenfolgen mithilfe von Daten aus der lokalen Umgebung. Um erweiterbare Zeichenfolgenwerte aus der Registrierung auf einem Remotecomputer abzurufen, verwenden Sie die GetValue Überladung, um anzugeben, dass Umgebungszeichenfolgen nicht erweitert werden sollen.

Weitere Informationen

• GetValueNames()
• SetValue
• DeleteValue(String)
• ValueCount
• GetSubKeyNames()