AutoPostBack Not Working For Custom Control?

Jan 12, 2011

I have created a custom control in ASP.net which includes a DropDownList with AutoPostBack set to true. I have also attached an event SelectedIndexChanged for the control.But I find that the event is not fired. Where as normal asp.net DropDownList with AutoPostBack set to true will fire the event. I am using .net 3.5 version in VS2010.

Here is my code:

ServerControl1.cs
[ToolboxData("<{0}:ServerControl2 runat=server></{0}:ServerControl2>")]
public class ServerControl1 : WebControl
{
protected DropDownList drplist;
protected TextBox tb;
protected override void RenderContents(HtmlTextWriter output)
{

[Code]....

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