Use Trace.Write to write message (C#) : Trace « Development « ASP.NET Tutorial

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ASP.NET Tutorial » Development » Trace 
9.44.6.Use Trace.Write to write message (C#)
File: Default.aspx

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

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Button ID="cmdWrite" runat="server" OnClick="cmdWrite_Click" Text="Write" />
        <asp:Button ID="cmdWriteCategory" runat="server" OnClick="cmdWriteCategory_Click"
            Text="Write Category" />
        <asp:Button ID="cmdError" runat="server" OnClick="cmdError_Click" Text="Write Error" />
    
    </div>
    </form>
</body>
</html>


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(50);
        }
        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;
    }
}
9.44.Trace
9.44.1.Trace.IsEnabled
9.44.2.Enable trace in Web.config
9.44.3.Enabling Page Level Tracing
9.44.4.Set Page.Trace.IsEnabled to true (C#)
9.44.5.Write warning message with Trace.Warn
9.44.6.Use Trace.Write to write message (C#)
9.44.7.Trace to a file
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