如何：记录多线程组件的事件

项目
06/09/2015

当记录多线程组件中的事件时，就应该考虑特殊注意事项了。您必须提供一种方法来标识作为事件来源的线程。还必须确保当记录事件时，线程不会互相干扰。有关详细信息，请参见事件日志和多线程组件。

在多线程应用程序中使用事件日志

声明并创建事件日志。有关详细信息，请参见 How to: Create and Remove Custom Event Logs。

将每个线程的 Name 属性设置为唯一的标识符。

Dim X as Integer
X = 0
Dim MyThread as New Threading.Thread(AddressOf MyMethod)
MyThread.Name = "Thread number " & X.ToString
' Increments X so no other threads will share the same name.
X += 1

int X;
X = 0;
Thread MyThread = new Thread(new 
   ThreadStart(MyMethod));
MyThread.Name = "Thread Number " + X.ToString();
// Increments X so no other threads will share the same name.
X += 1;

为事件日志创建新的 Source，并将 Name 设置为与该线程对应的唯一字符串值。有关如何创建 Source 的详细信息，请参见 How to: Add Your Application as a Source of Event Log Entries。

Imports System.Threading
' Checks to see if there already is a source with the name of the 
' thread.
If Not EventLog.SourceExists(Thread.CurrentThread.Name.ToString, _
   "myApplication") Then
   ' Creates a source with the name of the thread
   EventLog.CreateEventSource(Thread.CurrentThread.Name.ToString, _
      "MyApplication")
End If

// These lines go at the top of the code
using System.Threading;
using System.Diagnostics;
// Checks to see if there already is a source with the name of the 
// thread.
if (!EventLog.SourceExists(CurrentThread.Name.ToString()))
   // Creates a source with the name of the thread.
   EventLog.CreateEventSource(CurrentThread.Name.ToString(), 
      "MyApplication");

将事件日志的 Source 属性设置为该线程的名称，然后调用 WriteEntry 方法。

备注

确保在进行这些操作之前获得事件日志上的专用锁。

' Use the SyncLock keyword to obtain an exclusive lock on an object.
SyncLock MyEventLog
  MyEventLog.Source = Thread.CurrentThread.Name.ToString
  EventLog.WriteEntry(Thread.CurrentThread.Name.ToString, _
     "Error in Widget 42")
End SyncLock

// Use the lock keyword to obtain an exclusive lock on an object
lock(MyEventLog)
{
  MyEventLog.Source = Thread.CurrentThread.Name.ToString();
  EventLog.WriteEntry(Thread.CurrentThread.Name.ToString(),
     "Error in Widget 42");
}

请参见

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如何：记录多线程组件的事件

在多线程应用程序中使用事件日志

请参见

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参考

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