Access an ASP.NET control on a MasterPage using jQuery

I must have been asked this question numerous times -- How do I access an asp.net control kept in the master page using jQuery? Here’s one of the ways of how to populate the value of an ASP.NET TextBox kept in a MasterPage using jQuery

MasterPage

<%@ Master Language="C#" AutoEventWireup="true"
CodeFile="MasterPage.master.cs" Inherits="MasterPage" %>

<!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>Access Control using jQuery</title>
    <asp:ContentPlaceHolder id="head" runat="server">
    </asp:ContentPlaceHolder>
   
    <script src="Scripts/jquery-1.3.2.js"
    type="text/javascript"></script>
    <script type="text/javascript">
        $(document).ready(function() {
            $("input[id$='txtName']").val("Text Added using jQuery");
        });
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <asp:ContentPlaceHolder id="ContentPlaceHolder1" runat="server">
   
    </asp:ContentPlaceHolder>
    </div>
    </form>
</body>
</html>

ContentPage

<%@ Page Language="C#" MasterPageFile="~/MasterPage.master"

AutoEventWireup="true" CodeFile="MasterPage.aspx.cs" Inherits="MasterPage"%>

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">

</asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1"

Runat="Server">

<asp:TextBox ID="txtName" runat="server"></asp:TextBox>

</asp:Content>

Note how we selected the MasterPage using the $("input[id$='txtName']") . This is because the TextBox in the MasterPage gets renamed as shown below:

On running the page, the textbox gets populated using jQuery

Check out my other ASP.NET jQuery articles.

About The Author

Suprotim Agarwal, Developer Technologies MVP (Microsoft Most Valuable Professional) is the founder and contributor for DevCurry, DotNetCurry and SQLServerCurry. He is the Chief Editor of a Developer Magazine called DNC Magazine. He has also authored two Books - 51 Recipes using jQuery with ASP.NET Controls. and The Absolutely Awesome jQuery CookBook.

Follow him on twitter @suprotimagarwal.

Access an ASP.NET control on a MasterPage using jQuery

About The Author

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