在ASP.NET代码里访问跟踪信息-.NET教程,Asp.Net开发

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＞