Using jQuery to Prevent ASP.NET Server Side Events from Occuring

I recently was wiring up the ASP.NET Button control with jQuery and checking out the different events related to the same. I also wanted to see if it was possible to stop a server side event from occuring using jQuery.

For example: I have an ASP.NET button control which causes a postback when it is clicked. However what if you want to check a condition at ClientSide and then allow the postback to occur. Here's how to prevent a postback from occuring using jQuery.


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">


 


<html xmlns="http://www.w3.org/1999/xhtml">


<head runat="server">


    <title></title>


    <script src="Scripts/jquery-1.3.2.js" type="text/javascript"></script>


    <script type="text/javascript">


        $(document).ready(function() {


            $("#<%=Button1.ClientID %>").click(function() {


                // check a condition


                if ("a" == "b")


                    return true;


                else


                    return false;


            });


        });


    </script>


</head>


<body>


    <form id="form1" runat="server">


    <div>


        <asp:Button ID="Button1" runat="server" Text="Click Me"


            onclick="Button1_Click" />


    </div>


    </form>


</body>


</html>




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About The Author

Suprotim Agarwal
Suprotim Agarwal, ASP.NET Architecture MVP (Microsoft Most Valuable Professional) works as an Architect Consultant and provides consultancy on how to design and develop Web applications.

Suprotim is also the founder and primary contributor to DevCurry, DotNetCurry and SQLServerCurry. He is the Editor of a Developer Magazine called DNC Magazine. He has also written two EBooks 51 Recipes using jQuery with ASP.NET Controls. and The Absolutely Awesome jQuery CookBook

Follow him on twitter @suprotimagarwal

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