CODEWITHSUNDEEP
c#asp.net
Realto619
Realto619

Reputation: 301

Having some trouble referencing a Literal in a user control that is included in a Master Page

Having some trouble referencing a Literal in a user control that is included in a Master Page. I'm testing using the following pages (paths probably included unnecessarily...):

~/_inc/header.ascx
~/master_pages/partner_header_footer.master
~/credit_check/test_page.aspx

header.ascx (relevant content)

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="header.ascx.cs" Inherits="_inc_header" %>
<link type="text/css" rel="stylesheet" href="/css/header.css" />
    <div id="header" class="content-header cf">
    <div id="logo"></div><asp:Literal id="contentTitle" runat="server" Text="Customer Service" /> 
</div>

partner_header_footer.master (relevant content)

<%@ Master Language="C#" AutoEventWireup="true" CodeFile="partner_header_footer.master.cs" Inherits="master_pages_partner" %>
<%@ Register Src="~/_inc/header.ascx" TagPrefix="uc1" TagName="header" %>
<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8" />
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />

    <title>Wireless</title>
</head>
<body>
    <form id="form1" runat="server">
        <uc1:header runat="server" ID="header" />
        <asp:ContentPlaceHolder id="Wireless" runat="server">
        </asp:ContentPlaceHolder>
    </form>
</body></html>

test_page.cs (relevant content)

protected void Page_Load(object sender, EventArgs e)
{
         Literal mpLiteral = (Literal)Master.FindControl("contentTitle");
        if (mpLiteral != null)
        {
            mpLiteral.Text = "Customer Service Home";
        }

  }

Not sure what I'm doing wrong, so hopefully someone can point out the error(s) of my ways...

Upvotes: 1

Views: 1083

Answers (1)

Garrison Neely
Garrison Neely

Reputation: 3289

Since the Literal is in a UserControl that is inside the Master Page, Master's FindControl won't be able to find it.

If you want to make the UC's Literal available to the Master, create a Property in the UC's code-behind:

public string MyLiteral { get{ return contentTitle.Text; } set{ contentTitle.Text = value; } }

Then, in your Master Page, you can access header.MyLiteral to set/get the value.

Now, if you want to make it accessible to Child Pages, you'd then expose it again as a Property, but this time in the Master's code-behind:

public string HeaderLiteral { get{ return header.MyLiteral; } set{ header.MyLiteral = value; } }

Finally, in the Child Page, you'll need to cast this.Master to the type of your Master Page (I think it's master_pages_partner based on your MP markup):

var castedMaster = (master_pages_partner)this.Master;
if(null != castedMaster)
{
    castedMaster.HeaderLiteral = "Customer Service Home";
}

Upvotes: 1

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