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Introduction

In this article I will explain how to access or get content or child page controls from master page in asp.net.

Description:

In previous post I explained how to access content page controls from master page in asp.net. Now I will explain how to access content page controls from master page in asp.net.

To get child or content page control values in master page first write the following code in master page like this

MasterPage.Master


<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Master Page with Controls</title>
<asp:ContentPlaceHolder id="head" runat="server">
</asp:ContentPlaceHolder>
</head>
<body>
<form id="form1" runat="server">
MasterPage Label:
<asp:Label ID="lblMaster" runat="server" />
MasterPage Textbox:
<asp:textbox ID="txtMaster" runat="server" />
<asp:ContentPlaceHolder id="ContentPlaceHolder1" runat="server">
</asp:ContentPlaceHolder>
</form>
</body>
</html>

After that write the code in Content Page Default.aspx will be like this


<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" MasterPageFile="~/MasterPage.master" %>

<asp:Content ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
<fieldset id="fld">
<legend><b>Content Page</b></legend>
Content Page Label Value:
<asp:Label ID="lblContent" Text="Sample Content Page label Control" runat="server"/>
<br />
Content Page Textbox Value:
<asp:Textbox ID="txtContent" Text="Sample Content Page Textbox Control" runat="server"/>
</fieldset>
</asp:Content>
After that add following namespaces in MasterPage.master.cs page in codebehind

C# Code (MasterPage)


using System;
using System.Web.UI.WebControls;
Now add following code in code behind


protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Label cotentlbl = (Label)ContentPlaceHolder1.FindControl("lblContent");
TextBox contenttxt = (TextBox)ContentPlaceHolder1.FindControl("txtContent");
lblMaster.Text = cotentlbl.Text;
txtMaster.Text = contenttxt.Text;
}
}
VB.NET Code (MasterPage)


Imports System.Web.UI.WebControls
Partial Public Class MasterPage
Inherits System.Web.UI.MasterPage
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
If Not IsPostBack Then
Dim cotentlbl As Label = DirectCast(ContentPlaceHolder1.FindControl("lblContent"), Label)
Dim contenttxt As TextBox = DirectCast(ContentPlaceHolder1.FindControl("txtContent"), TextBox)
lblMaster.Text = cotentlbl.Text
txtMaster.Text = contenttxt.Text
End If
End Sub
End Class
Demo


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5 comments :

Hafeez said...

This article (how to access child page controls from master page in asp.net.) helps for my project. Thanks

varun D said...

how to access the child page grid view values from master page.......

Iti Tyagi said...

Will it be working when there are multiple content pages.

Hemant Saini said...

how get controls from content page in master page , if we don't know the id of controls

Akshay Pardeshi said...

how to access controls from one content page to another content page?

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