asp using master page variable in content page
Question
I've read every post I can find on how to do this and tried them all. I have a Master page called DNAStaff (at root) containing:-
<%@ Master Language="C#" AutoEventWireup="true" CodeFile="DNAStaff.master.cs" Inherits="DNAStaff" %>
<!DOCTYPE html>
<html>
<head runat="server">
<title></title>
<link href="~/Styles/DNA.css" rel="stylesheet" type="text/css" />
<asp:ContentPlaceHolder id="head" runat="server">
</asp:ContentPlaceHolder>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ContentPlaceHolder id="ContentPlaceHolder1" runat="server">
</asp:ContentPlaceHolder>
...............
</div>
</form>
</body>
</html>
The Masterpage code behind includes:-
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.IO;
using System.Data;
public partial class DNAStaff : System.Web.UI.MasterPage
{
public string MyAccessLevel
{
get; set;
}
protected void Page_Load(object sender, EventArgs e)
{
string ConnectionString = "Data Source=NZ1;Initial Catalog=Intranet;Integrated Security=false;UID=IntranetAccess;PWD=*****";
string sqlstring = @"select [MenuID], [Item], Target, SecLevel from [MENUS] ";
SqlConnection conn = new SqlConnection(ConnectionString);
SqlDataReader rdr = null;
int MainGroup;
try
{
if (Request.Cookies["userinfo"] != null)
{
MyAccessLevel = Server.HtmlEncode(Request.Cookies["userinfo"]["accessLevel"]);
}
else
{
MyAccessLevel = "1";
}
.........
The content page includes:
<%@ Page Title="" Language="C#" MasterPageFile="~/DNAStaff.master" AutoEventWireup="true" CodeFile="main.aspx.cs" Inherits="main" %>
<%@ MasterType virtualpath="~/DNAStaff.master" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
Set Primary Project
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</asp:Content>
enter code here
and the content page code behind contains:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class main : System.Web.UI.Page
{
string AccessLevel = "";
protected void Page_Load(object sender, EventArgs e)
{
AccessLevel = Master.MyAccessLevel;
TextBox1.Text = AccessLevel;
}
}
The line "AccessLevel = Master.MyAccessLevel" gives an error:-
Error CS1061 'MasterPage' does not contain a definition for 'MyAccessLevel' and no extension method 'MyAccessLevel' accepting a first argument of type 'MasterPage' could be found (are you missing a using directive or an assembly reference?) 8_Live_main.aspx D:\\Development\\dnanew.steelpencil.com\\Live\\main.aspx.cs 13 Active
I want to set the variable MyAccessLevel in the MasterPage at load and read it in any content page. I'm obviously missing something, can someone please help?
3 answers
solution1
1 2017-07-10 09:45:38
You can access the Master Page like this.
Site1 master = ((Site1)(Page.Master));
TextBox1.Text = master.AccessLevel;
Where Site1 is the class name of the Master Page ( public partial class Site1 : System.Web.UI.MasterPage )
However you should know that the Master Page_Load is initialized at a later stage in the Page Life Cycle than the Page. So when you access the value of AccessLevel , it will always be empty.
solution2
1 2017-07-10 10:09:22
As in the content page already you have assigned the MasterType like below.
<%@ MasterType virtualpath="~/DNAStaff.master" %>
So now your child/content page can able to use/access the master layout including the public variable/properties defined in the master page.
So now, as per your requirement, to access the public property( AccessLevel ) defined in your master page and assign to the child/content page textbox , you need to write the below code
Site myMaster = ((Site)(Page.Master));
TextBox1.Text = myMaster .AccessLevel;
Hope it solves your problem.
Here are the more references about Master page and accessing the contents of master page
solution3
0 2017-07-10 09:56:12
This post should answer your question.
You must add
<%@ MasterType VirtualPath="~/your page path" %>
directive to your page
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