Problem with Button that always causes validation in ASP.NET

[naju]

Ok, for any button I add to the aspx page directly, if I juste set their CausesValidation property to false and it doesn't cause validation.

For a button or imagebutton added programatically in C#, I'd go:

ImageButton im = new ImageButton();
im.ImageUrl = "~/images/"+p_row.ItemArray[2].ToString();
im.CausesValidation = false;
im.Click += new ImageClickEventHandler(im_Click);
tc.Controls.Add(im);

The requiredfieldvalidator doesn't seem to acknowledge this at all and still pops up every time I click on my imageButton/Button. Is there anything else I need to do to stop a button added in C# from causing validation ?

Note: The validator is on the masterpage and the button in a ContentPlaceHolder; I don't think it matters at all but just in case.

[naju]

Found the problem. The image button was not instanciated on postback, only on first view. However, it's still weird that the validator is triggered in such a case, when the button doesn't even exist anymore after being clicked (how could it cause validation?). Oh well.