How to prevent a page Post Back on Button_Click event occurs

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.NET3.5

Hi,

I need to get a solution for how to prevent a page post back on a button click event occurs. But I need to still continue with the Button_Click event and only need to prevent the post back.

I already tried with OnClientClick="return false;" this completely preventing to call the Button_Click event.

Your help will he highly appreciated.

Posted 30-Oct-14 3:22am

Dhanesh P M

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ZurdoDev · Answer 1 · 2014-10-30T03:24:00

Solution 1

You can't. And you need to understand how the web works to understand why you can't. C# runs on the server and for it to run the client has to postback.

Now, what you can do is change the button click to call JavaScript that then calls your code as a webservice. Look at jQuery's $.ajax() method.

Posted 30-Oct-14 3:24am

ZurdoDev

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[no name] 30-Oct-14 9:36am

Thank you Ryan for your quick reply

By the way, Can u explain "change the button click to call JavaScript that then calls your code as a webservice" what you realy ment?

Thanks7872 30-Oct-14 9:40am

Atleast try something your self. He meant this:

http://www.aspsnippets.com/Articles/Calling-ASPNet-WebMethod-using-jQuery-AJAX.aspx

ZurdoDev 30-Oct-14 9:42am

That looks like a good link. Thanks for contributing.

ZurdoDev 30-Oct-14 9:41am

OnClientClick="callWebService(); return false;"

and then create a JS file that has a function named callWebService() which is where you'll call your webservice. Just google for examples of how to use .ajax() if you haven't used it before. There are tons of examples online.

Kan07 · Answer 2 · 2014-10-30T22:01:00

Solution 3

Use Update panel for avoiding full page loading...

Posted 30-Oct-14 22:01pm

Kan07