Dynamically added ASP.NET button click handler being ignored

Question

I am adding event handlers to a button like this:

btn.Click += new EventHandler(btn_Click);

However the btn_Click function is not being called (never hits the breakpoint in it) and the button just reloads the page. In my past experience, asp buttons usually perform the click code before reloading the page, so how do I get that to happen when the event is dynamically added?

I also set CausesValidation = false, although there's no validation on the page so I don't think that would have influence anyway.

You have to add this code in in Page.Load and not in page.IsPostback? Is this the mistake you are making ? — Anand
– Anand, Commented Jun 28, 2012 at 13:38
OK I think I get it. I was adding it during another button click, but I need to add it during page load instead for it to work...am I understanding correctly? — user1442605
– user1442605, Commented Jun 28, 2012 at 13:43

amartin65 · Accepted Answer · 2012-06-28 14:20:55Z

2

The event handler needs to be bound for every request regardless of whether or not the page is being posted back. The binding of the event handler is lost at the start of each page request. Event handlers for buttons are typically bound in Page_Load.

answered Jun 28, 2012 at 14:20

amartin65

724 silver badges9 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

user1442605 Over a year ago

Both of these answers help me to understand, although I can only accept one. Either way, thanks!

Claudio Redi · Accepted Answer · 2012-06-28 14:21:42Z

1

You have to set event handlers on Load event (or before). If you do it after Load, it won't be executed since by the time the handler for the event is evaluated it won't be there.

Check this msdn article in relation to page life cycle. I think it will help you to understand. See that event handling occurs inmediatly after Load

answered Jun 28, 2012 at 14:21

Claudio Redi

68.6k15 gold badges138 silver badges161 bronze badges

Collectives™ on Stack Overflow

Dynamically added ASP.NET button click handler being ignored

2 Answers 2

1 Comment

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related