Selected state not maintained on postback

[Santel]

Hi,

I tried to create a custom server control that displays some radio
buttons and it should postback the page on selecting the items. I
tried like below code, but on postback, the selected radio button
state is not maintained. Anyone could tell me what is missing?

public class WebCustomControl1 : RadioButtonList
{
protected override void Render(HtmlTextWriter output)
{
this.Items.Add(new ListItem("aaa"));
this.Items.Add(new ListItem("bbb"));
this.AutoPostBack = true;

base.Render(output);
}
}

 

[Steve C. Orr [MCSD, MVP, CSM, ASP Insider]]

Try moving those lines from the Render event to the Init event.

 

[Santel]

Hi Steve,

Thanks for the reply. As it is custom control class, I couldn't see
any Init event there. Could you tell me which one you are telling?

 

[Teemu Keiski]

You'd need to wire an event hander for it. Same can be achieved by
overriding OnInit method in your control.

protected override void OnInit(EventArgs e)
{
base.OnInit(e);
//...
this.Items.Add(new ListItem("aaa"));
this.Items.Add(new ListItem("bbb"));
this.AutoPostBack = true;

}