EventLog コンストラクター

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

public:
 EventLog();

public EventLog();

Public Sub New ()

例

次の例では、ソース MySource がまだ存在しない場合は作成し、イベント ログ MyNewLogにエントリを書き込みます。

using System;
using System.Diagnostics;
using System.Threading;

class MySample{

    public static void Main(){

        // Create the source, if it does not already exist.
        if(!EventLog.SourceExists("MySource"))
        {
             //An event log source should not be created and immediately used.
             //There is a latency time to enable the source, it should be created
             //prior to executing the application that uses the source.
             //Execute this sample a second time to use the new source.
            EventLog.CreateEventSource("MySource", "MyNewLog");
            Console.WriteLine("CreatedEventSource");
            Console.WriteLine("Exiting, execute the application a second time to use the source.");
            // The source is created.  Exit the application to allow it to be registered.
            return;
        }

        // Create an EventLog instance and assign its source.
        EventLog myLog = new EventLog();
        myLog.Source = "MySource";

        // Write an informational entry to the event log.
        myLog.WriteEntry("Writing to event log.");
    }
}

Option Explicit
Option Strict

Imports System.Diagnostics
Imports System.Threading

Class MySample
    Public Shared Sub Main()
        
        If Not EventLog.SourceExists("MySource") Then
            ' Create the source, if it does not already exist.
            ' An event log source should not be created and immediately used.
            ' There is a latency time to enable the source, it should be created
            ' prior to executing the application that uses the source.
            ' Execute this sample a second time to use the new source.
            EventLog.CreateEventSource("MySource", "MyNewLog")
            Console.WriteLine("CreatingEventSource")
            'The source is created.  Exit the application to allow it to be registered.
            Return
        End If
        
        ' Create an EventLog instance and assign its source.
        Dim myLog As New EventLog()
        myLog.Source = "MySource"
        
        ' Write an informational entry to the event log.    
        myLog.WriteEntry("Writing to event log.")
    End Sub
End Class

注釈

WriteEntryを呼び出す前に、EventLog インスタンスのSource プロパティを指定します。 ログから Entries のみを読み取る場合は、 Log と MachineName のプロパティのみを指定することもできます。

次の表に、 EventLogのインスタンスの初期プロパティ値を示します。

こちらもご覧ください

• Source
• Log
• MachineName
• Entries
• WriteEntry
• WriteEvent
• EventLogEntry

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

public:
 EventLog(System::String ^ logName);

public EventLog(string logName);

new System.Diagnostics.EventLog : string -> System.Diagnostics.EventLog

Public Sub New (logName As String)

パラメーター

例外

例

次の例では、ローカル コンピューター上のイベント ログ "myNewLog" のエントリを読み取ります。

using System;
using System.Diagnostics;
using System.Threading;

class MySample
{
    public static void Main()
    {
        // Create the source, if it does not already exist.
        if (!EventLog.SourceExists("MySource"))
        {
            //An event log source should not be created and immediately used.
            //There is a latency time to enable the source, it should be created
            //prior to executing the application that uses the source.
            //Execute this sample a second time to use the new source.
            EventLog.CreateEventSource("MySource", "MyNewLog");
            Console.WriteLine("CreatedEventSource");
            Console.WriteLine("Exiting, execute the application a second time to use the source.");
            // The source is created.  Exit the application to allow it to be registered.
            return;
        }

        // Create an EventLog instance and assign its log name.
        EventLog myLog = new EventLog("myNewLog");

        // Read the event log entries.
        foreach (EventLogEntry entry in myLog.Entries)
        {
            Console.WriteLine("\tEntry: " + entry.Message);
        }
    }
}

Option Explicit
Option Strict

Imports System.Diagnostics
Imports System.Threading

Class MySample
    Public Shared Sub Main()
        
        If Not EventLog.SourceExists("MySource") Then
            ' Create the source, if it does not already exist.
            ' An event log source should not be created and immediately used.
            ' There is a latency time to enable the source, it should be created
            ' prior to executing the application that uses the source.
            ' Execute this sample a second time to use the new source.
            EventLog.CreateEventSource("MySource", "MyNewLog")
            Console.WriteLine("CreatingEventSource")
            'The source is created.  Exit the application to allow it to be registered.
            Return
        End If

        Dim myLog As New EventLog("myNewLog")
        
        ' Read the event log entries.
        Dim entry As EventLogEntry
        For Each entry In  myLog.Entries
            Console.WriteLine((ControlChars.Tab & "Entry: " & entry.Message))
        Next entry
    End Sub
End Class

注釈

このオーバーロードは、 Log プロパティを logName パラメーターに設定します。 WriteEntryを呼び出す前に、EventLog インスタンスのSource プロパティを指定します。 ログから Entries のみを読み取る場合は、 Log と MachineName のプロパティのみを指定することもできます。

Source プロパティで指定したソースがコンピューター上の他のソースから一意である場合、WriteEntryを呼び出すと、指定した名前のログがまだ存在しない場合に作成されます。

次の表に、 EventLogのインスタンスの初期プロパティ値を示します。

こちらもご覧ください

• Source
• Log
• MachineName
• Entries
• WriteEntry
• WriteEvent
• EventLogEntry

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

public:
 EventLog(System::String ^ logName, System::String ^ machineName);

public EventLog(string logName, string machineName);

new System.Diagnostics.EventLog : string * string -> System.Diagnostics.EventLog

Public Sub New (logName As String, machineName As String)

パラメーター

例外

例

次の例では、コンピューター "myServer" のイベント ログ "myNewLog" のエントリを読み取ります。

using System;
using System.Diagnostics;
using System.Threading;

class MySample1
{
    public static void Main()
    {
        // Create the source, if it does not already exist.
        if (!EventLog.SourceExists("MySource"))
        {
            //An event log source should not be created and immediately used.
            //There is a latency time to enable the source, it should be created
            //prior to executing the application that uses the source.
            //Execute this sample a second time to use the new source.
            EventLog.CreateEventSource("MySource", "MyNewLog", "myServer");
            Console.WriteLine("CreatedEventSource");
            Console.WriteLine("Exiting, execute the application a second time to use the source.");
            // The source is created.  Exit the application to allow it to be registered.
            return;
        }
        // Create an EventLog instance and assign its log name.
        EventLog myLog = new EventLog("myNewLog", "myServer");

        // Read the event log entries.
        foreach (EventLogEntry entry in myLog.Entries)
        {
            Console.WriteLine("\tEntry: " + entry.Message);
        }
    }
}

Option Explicit
Option Strict

Imports System.Diagnostics
Imports System.Threading

Class MySample
    Public Shared Sub Main()
        If Not EventLog.SourceExists("MySource") Then
            ' Create the source, if it does not already exist.
            ' An event log source should not be created and immediately used.
            ' There is a latency time to enable the source, it should be created
            ' prior to executing the application that uses the source.
            ' Execute this sample a second time to use the new source.
            EventLog.CreateEventSource("MySource", "MyNewLog", "myServer")
            Console.WriteLine("CreatingEventSource")
            'The source is created.  Exit the application to allow it to be registered.
            Return
        End If

        ' Create an EventLog instance and assign its log name.
        Dim myLog As New EventLog("myNewLog", "myServer")
        
        ' Read the event log entries.
        Dim entry As EventLogEntry
        For Each entry In  myLog.Entries
            Console.WriteLine((ControlChars.Tab & "Entry: " & entry.Message))
        Next entry
    End Sub
End Class

注釈

このオーバーロードでは、 Log プロパティを logName パラメーターに、 MachineName プロパティを machineName パラメーターに設定します。 WriteEntryを呼び出す前に、EventLogのSource プロパティを指定します。 ログから Entries のみを読み取る場合は、 Log と MachineName のプロパティのみを指定することもできます。

次の表に、 EventLogのインスタンスの初期プロパティ値を示します。

こちらもご覧ください

• Source
• Log
• MachineName
• Entries
• WriteEntry
• WriteEvent
• EventLogEntry

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

ソース:

EventLog.cs

public:
 EventLog(System::String ^ logName, System::String ^ machineName, System::String ^ source);

public EventLog(string logName, string machineName, string source);

new System.Diagnostics.EventLog : string * string * string -> System.Diagnostics.EventLog

Public Sub New (logName As String, machineName As String, source As String)

パラメーター

例外

例

次の例では、ソース "MySource" を使用して、ローカル コンピューター上のイベント ログ "MyNewLog" にエントリを書き込みます。

using System;
using System.Diagnostics;
using System.Threading;

class MySample2
{
    public static void Main()
    {
        // Create the source, if it does not already exist.
        if (!EventLog.SourceExists("MySource"))
        {
            //An event log source should not be created and immediately used.
            //There is a latency time to enable the source, it should be created
            //prior to executing the application that uses the source.
            //Execute this sample a second time to use the new source.
            EventLog.CreateEventSource("MySource", "MyNewLog");
            Console.WriteLine("CreatedEventSource");
            Console.WriteLine("Exiting, execute the application a second time to use the source.");
            // The source is created.  Exit the application to allow it to be registered.
            return;
        }
        // Create an EventLog instance and assign its source.
        EventLog myLog = new EventLog("myNewLog", ".", "MySource");

        // Write an entry to the log.
        myLog.WriteEntry("Writing to event log on " + myLog.MachineName);
    }
}

Option Strict
Option Explicit

Imports System.Diagnostics
Imports System.Threading

Class MySample
    Public Shared Sub Main()
        If Not EventLog.SourceExists("MySource") Then
            ' Create the source, if it does not already exist.
            ' An event log source should not be created and immediately used.
            ' There is a latency time to enable the source, it should be created
            ' prior to executing the application that uses the source.
            ' Execute this sample a second time to use the new source.
            EventLog.CreateEventSource("MySource", "MyNewLog")
            Console.WriteLine("CreatingEventSource")
            'The source is created.  Exit the application to allow it to be registered.
            Return
        End If
        ' Create an EventLog instance and assign its source.
        Dim myLog As New EventLog("myNewLog", ".", "MySource")
        
        ' Write an entry to the log.        
        myLog.WriteEntry(("Writing to event log on " & myLog.MachineName))
    End Sub
End Class

注釈

このコンストラクターは、 Log プロパティを logName パラメーターに設定し、 MachineName プロパティを machineName パラメーターに設定し、 Source プロパティを source パラメーターに設定します。 イベント ログに書き込む場合は、 Source プロパティが必要です。 ただし、イベント ログからのみ読み取る場合は、 Log プロパティと MachineName プロパティのみが必要です (サーバー上のイベント ログに既にソースが関連付けられている場合)。 イベント ログからのみ読み取る場合は、コンストラクターの別のオーバーロードで十分な場合があります。

次の表に、 EventLogのインスタンスの初期プロパティ値を示します。

こちらもご覧ください

• Source
• Log
• MachineName
• Entries
• WriteEntry
• WriteEvent
• EventLogEntry