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File: Default.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="TraceExample" Trace="true" %>



    Untitled Page


    
    

        
                    Text="Write Category" />
        
    
    

    


File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class TraceExample : System.Web.UI.Page
{
    protected void cmdError_Click(object sender, EventArgs e)
    {
        try
        {
            DivideNumbers(5, 0);
        }
        catch (Exception err)
        {
            Trace.Warn("cmdError_Click", "Caught Error", err);
        }
    }
    protected void cmdWrite_Click(object sender, EventArgs e)
    {
        Trace.Write("About to place an item in session state.");
        Session["Test"] = "Contents";
        Trace.Write("Placed item in session state.");
    }
    protected void cmdWriteCategory_Click(object sender, EventArgs e)
    {
        Trace.Write("Page_Load", "About to place an item in session state.");
        Session["Test"] = "Contents";
        Trace.Write("Page_Load", "Placed item in session state.");
    }
    private decimal DivideNumbers(decimal number, decimal divisor)
    {
        return number / divisor;
    }
}