Event of dynamically added control is not fired

Question

Event of dynamically added control is not fired. This happens in a function called in the create child controls event of the page.

Button bb = new Button();
bb.Click += new EventHandler(bb_Click);
PlaceHolderQuestions.Controls.Add(bb);

Answer 1

You need to put it in an earlier event. Try putting the code in the init event handler.

Answer 2

Asp.net pages have a lifecyle. Event dispatching is done based on control tree. Your dynamic control should be in in the control tree. Add the control to the placeholder in OnInit or Onload of you page or containing control and the event will be dispatched.

Answer 3

Ensure that this button is also dynamically created on each Page_Load. I often make the mistake of putting similar code inside of:

If Not Page.IsPostback()
  ...
End if

However since Page_Load fires before the handler for the button click, if you fail to create the button during a postback then the button does not 'exist' by the the time its event fires.