//引入命名空间
using System;
using System.Text;
using System.Web;
using System.Web.Management;

namespace SamplesAspNet
{
    // Implements a custom WebErrorstEvent that uses the 
    // WebThreadInformation. 
    public class SampleWebThreadInformation :
        WebErrorEvent
    {
        private StringBuilder eventInfo;

        // Instantiate events identified 
        // only by their event code.
        public SampleWebThreadInformation(
            string msg, object eventSource,
            int eventCode, Exception e)
            :
            base(msg, eventSource, eventCode, e)
        {
            // Perform custom initialization.
            eventInfo = new StringBuilder();
            eventInfo.Append(string.Format(
            "Event created at: {0}",
            EventTime.ToString()));
        }

        // Raises the event.
        public override void Raise()
        {
            // Perform custom processing. 
            eventInfo.Append(string.Format(
                "Event raised at: {0}",
               EventTime.ToString()));
            // Raise the event.
            base.Raise();
        }

        // Get the impersonation mode.
        public string GetThreadImpersonation()
        {
            return (string.Format(
                "Is impersonating: {0}",
                ThreadInformation.IsImpersonating.ToString()));
        }

        // Get the stack trace.
        public string GetThreadStackTrace()
        {
            return (string.Format(
                "Stack trace: {0}",
                ThreadInformation.StackTrace));
        }

        // Get the account name.
        public string GetThreadAccountName()
        {
            return (string.Format(
                "Request user host address: {0}",
                ThreadInformation.ThreadAccountName));
        }

        // Get the task Id.
        public string GetThreadId()
        {
            // Get the request principal.
            return (string.Format(
                "Thread Id: {0}",
                ThreadInformation.ThreadID.ToString()));
        }


        // Formats Web request event information.
        public override void FormatCustomEventDetails(
         WebEventFormatter formatter)
        {

            // Add custom data.

            formatter.AppendLine("");
            formatter.AppendLine(
                "Custom Thread Information:");

            formatter.IndentationLevel += 1;

            // Display the thread information obtained 
            formatter.AppendLine(GetThreadImpersonation());
            formatter.AppendLine(GetThreadStackTrace());
            formatter.AppendLine(GetThreadAccountName());
            formatter.AppendLine(GetThreadId());
            formatter.IndentationLevel -= 1;

            formatter.AppendLine(eventInfo.ToString());
        }

    }
}