如何：記錄多執行緒元件的事件

發行項
06/09/2015

當記錄多執行緒元件的事件時，有些特殊事項是必須列入考量的。您必須提供方法來辨識事件來源的執行緒。當記錄事件時，您也必須確保執行緒不會互相干擾。如需詳細資訊，請參閱事件記錄檔和多執行緒元件。

若要在多執行緒應用程式中使用事件記錄檔

宣告並建立事件記錄檔。如需詳細資訊，請參閱How to: Create and Remove Custom Event Logs。

將每個執行緒的 Name 屬性設定為唯一識別項。

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;

為事件記錄檔建立新 Source，接著將 Name 設定為與執行緒對應的唯一字串值。如需建立 Source 的詳細資訊，請參閱 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");

將事件記錄檔的 Source 屬性設定為執行緒的名稱，接著呼叫 WriteEntry 方法。

注意事項
請務必在繼續這些作業之前，先取得事件記錄檔的獨佔鎖定。

' 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");
}

請參閱

共用方式為

如何：記錄多執行緒元件的事件

若要在多執行緒應用程式中使用事件記錄檔

請參閱

工作

參考

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其他資源