handling events of controls added during runtime

Question

I am adding controls dynamically during runtime using a conrolplace holder. i want to add buttons and handle their event. they will do the same thing but with different parameter. here is a sample of the code:

while (dataReader.Read())
{
      Button edit = new Button();

      PlaceHolderQuestions.Controls.Add(edit);
}

i need to handle the event of the buttons. Thanks

Answer 1

You can just create a method, then add:

edit.Click += YourMethodName;

As long as the same button is created on postback before the eventhandler is raised, the event will fire.

Answer 2

A couple of things:

Firstly you need to make sure the new Controls are added in the Page.OnInit event, so that they are added before the raised events are processed.

They also need to be added again on a postback!

They also need to have a unique ID set.

Finally you can handle the event just like you would in any C# app:

edit.Click += new EventHander(EditButton_Click);

and later in the code:

protected void EditButton_Click(object sender, EventArgs e)
{
  // Do Something
}