how to call server side function from javascript

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I am developing an online app in which i need to call vb.net(asp.net) functions form javascript that are fired on drag and drop events. so how can i call server side functions and pass parameters to the function using javascript....

Posted 14-Feb-14 0:37am

Soumya Kanti Sar

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karthik Udhayakumar · Answer 1 · 2014-02-14T01:09:00

Solution 2

Refer this
http://www.c-sharpcorner.com/UploadFile/rohatash/calling-server-side-function-from-javascript-in-Asp-Net/[^]

Posted 14-Feb-14 1:09am

karthik Udhayakumar

Member 10476757 · Answer 2 · 2014-02-14T01:06:00

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You can use the PageMethods to call server side function (C#) from ClientSide(Javascript)



1) Add a script Manager to your page and set the 'EnablePageMethods' property of script manager to True.

<asp:ScriptManager ID="ScriptManager2" runat="server" EnablePageMethods="true"/>
2) Add Javascript function to the body section of page

<body>
    <form id="form1" runat="server">
    <script type="text/javascript">
        function CallingServerSideFunction() {
            PageMethods.GetData();
        }
    </script>
    </form>
</body>
3) Add the method you want to call in c#

    //Please note that the method should be a Static and WebMethod.
    [System.Web.Services.WebMethod]
    public static void GetData()
    {
        MessageBox.Show("Calling From Client Side");
        //Your Logic comes here
    }
4) Calling the Javascript function

<input id="Button2" type="button" value="FunctionCall" onclick="CallingServerSideFunction()" />