Calling a code behind function using Jquery

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Dear All,

I want to populate a dropdownlist on the selected index changed of the other dropdownlist without postback.

Could you please tell me how to do that using jquery as if i use traditional Ajax to call the code behind of same page,i will have to go through page_load event also which i want to avoid.

i mean --

XMLHTTP.open("POST", "Inbox_Grid.aspx", True);

This will call the code behind of "Inbox_Grid.aspx" starting from page load.But i dont want to execute that,
Please suggest!!

Posted 30-Jan-13 1:09am

gouravkaila

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Ankur^\m/ · Answer 1 · 2013-01-30T01:22:00

Solution 1

Check out this article - Using jQuery to directly call ASP.NET AJAX page methods[^].
I remember reading this while first implementing the scenario you mentioned. It's neat and simple.

There are many other on the web - calling asp.net server side code using jquery[^]

Hope this helps!

Posted 30-Jan-13 1:22am

Ankur^\m/

gouravkaila · Answer 2 · 2013-01-30T02:28:00

Ankur,

Thanks alot for the help.Seems it will solve the issue.I am trying but i have no experience of Jquery.

I am using the below code in JS

PHP

$ddlFrom = $('#DrpSearch');

$ddlFrom.change(
    function () {
        $.ajax({
            type: "GET",
            url: "NGTPInbox_Grid.aspx/fPopulateSearch",
            data: { ddlFrom: $ddlFrom.attr("selectedIndex") },
            success: function (data) {
                $("#DrpFromList").html(data)
            }
        });
    }
);

and my list is like--

XML

<select id="DrpSearch" class="MedBodyTextBlack" style="width: 120">
    <option value="ALL"  selected="selected">ALL</option>
    <option value="From" selected="selected">From</option>
    <option value="DATEANDTIME" selected="selected">DATEANDTIME</option>
    <option value="Form Name" selected="selected">Form Name</option>
    <option value="Form No" selected="selected">Form No</option>
    <option value="DECISION" selected="selected">DECISION</option>
    <option value="VALUE" selected="selected">VALUE</option>
</select>

I am not able to call the function "fPopulateSearch"

which is defined in code behind of the same page.

Suggest me where i am wrong?

thanks.