在ASP.NET代码里访问跟踪信息

     ASP.NET 2.0允许通过代码在TraceFinished事件里来访问每个请求的跟踪信息。TraceFinished事件是由TraceContext对象引发，用于在收集完所有请求信息后公开跟踪消息。可以利用此事件对跟踪信息进行不同的输出。以下代码就是用程序输出跟踪信息。
  　　C#:
  
  ＜%@ Page Language="C#" %＞
  ＜SCRIPT runat="server"＞
  protected void Page_Load(object sender, System.EventArgs e)
  {
  　Trace.TraceFinished += new TraceContextEventHandler(OnTraceFinished);
  　Trace.Write("自定义类别", "自定义跟踪消息");
  }
  private void OnTraceFinished(object sender, TraceContextEventArgs e)
  {
  　foreach (TraceContextRecord tcr in e.TraceRecords)
  　{
  　　Response.Write(string.Format(" ＜li＞跟踪类别:{0} 跟踪消息:{1}", tcr.Category, tcr.Message));
  　}
  }
  ＜/SCRIPT＞
  
  　　VB.NET:
  
  ＜%@ Page Language="VB"%＞
  ＜SCRIPT runat="server"＞
  Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
  　AddHandler Trace.TraceFinished, AddressOf OnTraceFinished
  　　Trace.Write("自定义类别", "自定义跟踪消息")
  End Sub
  Private Sub OnTraceFinished(ByVal sender As Object, ByVal e As TraceContextEventArgs)
  　Dim tcr As TraceContextRecord
  　For Each tcr In e.TraceRecords
  　　Response.Write(String.Format(" ＜li＞跟踪类别:{0} 跟踪消息:{1}", tcr.Category, tcr.Message))
  　Next
  End Sub
  
  ＜/SCRIPT＞