Auto Event WireUp

The AutoEventWireUp value may have the value of true or false

We can specify the default value of the AutoEventWireup in the following locations

=>machine.config
=>web.config
=>Individual webforms
=>WebUser Controls

Web.config

<Configuration>
<system.web>
<pages autoEventWireUp=true/>
</system.web>
</configuration>

If you make this changes in web.config file ,it will effect to all ASP.NET webforms.But this we can ovverride in each ASP.NET page.

EX:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string msg = "Auto Event Wire Up Executed";
        lblAutoEventWireUp.Text = msg;
    }
    protected override void OnInit(EventArgs e)
    {
        this.Load += new System.EventHandler(this.Page_Load);
    }
}

If autoEventWireUp event false then it will not execute page load, we need to explicitly call the page_load in OnInit Event like above.