Calling ASP.NET event handler from Javascript

Does anyone know how to call an event handler from Javascript? What I am trying to do is a user clicks a button, I check to see that all the tasks are complete (from the database), if they aren't I display a confirm box saying "Should we mark all the tasks as complete?" If they select yes, I want to call a function in the ASP.NET code.

Any suggestions would be much appreciated!

Thanks,
Matt

In asp.net 1.0 and 1.1 it was

__doPostBack('myButtonID', '');

You may have to a validator on the page so that asp.net renders the javascript to handle this. You can easily put a linkbutton on with the url set to empty (or something like this).

EDIT : It gets complicated if you need the button to also do some validation. Let me know and I can try to help here.

There is a better method in asp.net 2.0 - something on a button called onBeforePostBack(). Not sure as I do not use it.

I have determined a solution to this problem. I create the "confirm" message on the server side:

string scriptCode ="if(confirm('Not all work order items have been marked as done. Would you like to mark all items as done and close the work order anyway?') == true) confirmComplete();";

as you can see, I place the confirm in an if statement that calls a javascript function on the page. The javascript function just calls the "click" event on a button I have place on the page and hidden using CSS. The action that the button takes on the server side is the action want it to take.

This brings an interesting problem. When I use the javascript function to click the button, it posts back but does not update the screen. Any suggestions now?

-Matt

Check this link

http://dotnetslackers.com/articles/aspnet/JavaScript_with_ASP_NET_2_0_Pages_Part1.aspx

CAllback Http handler http module

Hi all,

Can anybody tell me how to generate callback.This call back should NOT be in on aspx page .

I this its solution is Http module or Http handler but i dont have idea to implement .Give me some reference and sample code or examples for implementing call back using http handlers or httpmodule

thanks

Could you please describe in more detail what you want? A callback (as in ICallbackEventHandler) that is not on a page does not make sense.

I HAVE A WEB CONTROL CLASS LIBRARY IN WHICH I HAVE A .js FILE ADDED AS RESOURCE FILE . FROM THIS FILE I WANT TO SEND A CALL BACK AS I WANT TO USE "AJAX". BUT AS FAR I KNOW I REQUIRES A .aspx.cs PAGE WHICH I CAN'T ADD IN THE CLASS LIBRARY. HOW WILL I DO THIS TASK.

ANY KIND OF HELP IS APPRECIATED

ICallbackEventtHandler can be implmented in a Controt, it not true that it can be only implmented in a page. For more details of creating controls with ICallbackeventHandler checkout this articlehttp://msdn.microsoft.com/msdnmag/issues/05/01/CuttingEdge/default.aspx