Anilkumar Mantena

Jul 24th, 2006

AutoEventWireUP is the attribute which indicates that Visual Studio .NET will connect all event handlers explicitly using delegate code. Microsoft Documentation says that it is "true" by default, because when you want to write an event for a particular controls, one should double click on it. Then the delegate declaration is automatically added to the Page Initialization code and also an event to fire. But in reality it is set of "false" when u see the page directive (in html view). Because if you add any control in HTML view and wants to fire an event -
For example, You have created on Command Button ("CmdSubmit") with the help of <asp:Button id="CmdSubmit" Text="Submit" runat="Server">. When you want to write code when the button is clicked, you have to add another attribute OnClick="CmdSubmit_Click()" to the above html code. And in code behind you need to declare and define the method with the name "CmdSubmit_Click(object Sender, System.EventArgs e)" but it won't add any delegate declaration in Page_Initialization method.
For that you need to explicitly add that delegate declaration like
this.CmdSubmit.Click+=new System.EventHandler(this.CmdSubmit_Click);
This is all about AutoEventWireUp