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Asked: 2026-05-26T03:14:17+00:00

I have a jqueryscript that works with asp.net pages without masterpages. When the page

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I have a jqueryscript that works with asp.net pages without masterpages. When the page gets an reference to a masterpage the script stop working.

The masterpage:
Within the header:

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js" type="text/javascript"></script>

At codebehind:

protected void Page_Load(object sender, EventArgs e)
    {
        string script = "$(document).ready(function () { $(\"img[src*='help']\").click(function () { var id = $(this).attr(\"id\"); $(\"#helpviewer\").toggle(400); $(\"#helpviewer\").load(\"" + Page.ResolveUrl("~/help/help.aspx") + " \" + \"#\" + id); return false; }); });";
        ScriptManager.RegisterStartupScript(Page, Page.GetType(), Guid.NewGuid().ToString(), script, true);
    }

Here is the helppage that jquery loads:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="help.aspx.cs" Inherits="help_help" meta:resourcekey="PageResource1" %>

<!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>Untitled Page</title>
    </head>

    <body>
        <form id="form1" runat="server">
            <div id="helpUploadFile">
                <asp:literal id="Literal1" runat="server" meta:resourcekey="Literal1Resource1"></asp:literal>
            </div>
            <div id="helpPictureArchive">
                <asp:literal id="Literal2" runat="server" meta:resourcekey="Literal2Resource1"></asp:literal>
            </div>
            <div id="image1">
                <asp:literal id="Literal3" runat="server" meta:resourcekey="Literal3Resource1"></asp:literal>
            </div>
        </form>
    </body>
</html>

I belive my problem lies in the .load. The script is working, the helpviewer is shown up but the text is not loading.

Here is a working testpage without masterpage. and here is a testpage with the masterpage. Just click at the image to se the jquery.

Any idea whats wrong?

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1 Answer

  1. Editorial Team

    IDs in master pages (or any other container) get mangled due to the way naming containers work, so I like to reference my server controls using jQuery’s ends with selector:

    $("[id$='MyControlName']");

    Since the mangled IDs always have the control name on the right, this just works. The mangled ID would look something like this: MasterPage1_ctl02_MyControlName

    I’ve seen some people criticize this approach as relatively slow compared to concatenating in Control.ClientID, which is how I used to do it. But avoiding Control.ClientID means you can store your JavaScript in a seperate file, which is a best practice. Sometimes, if you’re getting extremely dynamic, doing JS on the server is unavoidable. But in a seperate file you’ve got better seperation of concerns, and Visual Studio gives you some intellisense, and so on.

    Here’s a related question: jQuery Selector: Id Ends With?

    More about naming containers: MSDN Article

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