Multiple content placeholders in masterpage : The Official Microsoft ASP.NET Forums

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Multiple content placeholders in masterpage

Aug 16, 2012 06:40 PM|LINK

Hello

I am trying to learn the concept of masterpages, i have the following code:

Masterpage.master

<%@ Master Language="VB" AutoEventWireup="true" CodeBehind="Masterpage.master.vb" Inherits="VUC_test.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></title>
    <asp:ContentPlaceHolder ID="head" runat="server">
    </asp:ContentPlaceHolder>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <div style="float: left; width: 220px; background: #ECECEC;">
            <asp:ContentPlaceHolder ID="Menu" runat="server"></asp:ContentPlaceHolder>
        </div>
        <div style="float: left;">
            <asp:ContentPlaceHolder ID="Content" runat="server"></asp:ContentPlaceHolder>
        </div>
    </div>
    </form>
</body>
</html>

Default.aspx

<%@ Page Title="" Language="vb" AutoEventWireup="true" MasterPageFile="~/Masterpage.Master" CodeBehind="Default.aspx.vb" Inherits="VUC_test._Default" %>
<asp:Content ID="Content3" ContentPlaceHolderID="Content" runat="server">
content
</asp:Content>

menu.aspx

<%@ Page Title="" Language="vb" AutoEventWireup="true" MasterPageFile="~/Masterpage.Master" CodeBehind="menu.aspx.vb" Inherits="VUC_test.menu" %>
<asp:Content ID="Content2" ContentPlaceHolderID="Menu" runat="server">
menu
</asp:Content>

Howerver, only the content from Default.aspx is being displayed, i can't understand why.

Kind regards

Edited by madsovenielsen on Aug 16, 2012 06:41 PM

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Re: Multiple content placeholders in masterpage

Aug 16, 2012 10:52 PM|LINK

Try to use empty <asp:Content>.
For example for Default.aspx

<%@ Page Title="" Language="vb" AutoEventWireup="true" MasterPageFile="~/Masterpage.Master" CodeBehind="Default.aspx.vb" Inherits="VUC_test._Default" %>
<asp:Content ID="Content3" ContentPlaceHolderID="Content" runat="server">
content
</asp:Content>
<asp:Content ID="ID" ContentPlaceHolderID="Menu" runat="server">
content Menu
</asp:Content>

and for menu

<%@ Page Title="" Language="vb" AutoEventWireup="true" MasterPageFile="~/Masterpage.Master" CodeBehind="menu.aspx.vb" Inherits="VUC_test.menu" %> 
<asp:Content ID="id" ContentPlaceHolderID="Content" runat="server"> 

</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="Menu" runat="server"> 
menu 
</asp:Content>

I think the problem, that you are leaving one of two content place holder not set although in master page you specified two placeholders.

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Re: Multiple content placeholders in masterpage

Aug 17, 2012 08:50 AM|LINK

Hello

Yes, it works if i have all the content in one file, but that is not what i want.

Masterpage.master

<%@ Master Language="VB" AutoEventWireup="true" CodeBehind="Masterpage.master.vb" Inherits="VUC_test.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></title>
    <asp:ContentPlaceHolder ID="head" runat="server">
    </asp:ContentPlaceHolder>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <div style="float: left; width: 220px; background: #ECECEC;">
            <asp:ContentPlaceHolder ID="Menu" runat="server"></asp:ContentPlaceHolder>
        </div>
        <div style="float: left;">
            <asp:ContentPlaceHolder ID="Content" runat="server"></asp:ContentPlaceHolder>
        </div>
    </div>
    </form>
</body>
</html>

Default.aspx

<%@ Page Title="" Language="vb" AutoEventWireup="true" MasterPageFile="~/Masterpage.Master" CodeBehind="Default.aspx.vb" Inherits="VUC_test._Default" %>
<asp:Content ID="Content3" ContentPlaceHolderID="Content" runat="server">
content
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="Menu" runat="server">
menu
</asp:Content>

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Re: Multiple content placeholders in masterpage

Aug 18, 2012 03:50 PM|LINK

Could you explain what you want?

Perhaps i misunderstood you.

My thoughts:

You don`t need to create contentplace holder for evert page. In you case you can use one placeholder.

Edited by Daniil T. on Aug 18, 2012 03:52 PM

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Re: Multiple content placeholders in masterpage

Aug 18, 2012 04:35 PM|LINK

Yes, no problem. :)

I would like to have a .aspx file for each content placeholder.

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Re: Multiple content placeholders in masterpage

Aug 18, 2012 10:29 PM|LINK

Why you need that ?

You need to load content in one contentplaceholder.
for example:
in your master page place one ContentPlaceHolder and in each .aspx place <content> and put you content there.
If you want to put some other content in master without contentplaceholder you can use placeholder and put content there programatically.

Example from my project.
Maste:

<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Main.Master.cs" Inherits="WEB_GUI_Simple.WebGUI" %>

<!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>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" />
    <title>M2DT</title>
    <link href="css/normalize.css" rel="stylesheet" type="text/css" />
    <link href="css/style.css" rel="stylesheet" type="text/css" />
</head>
<body>
    
       
        

    
    <form id="mainForm" runat="server">
    <div class="clouds"></div>
    <div class="top-line"></div>
    <div class="paper-bird"></div>
    <div runat="server" id="topMenu" class="top-menu">
        <asp:PlaceHolder ID="menuPlaceHolder" runat="server"></asp:PlaceHolder>
    </div>
    <div class="logout">
        <asp:Button ID="LogOut" CssClass="logOutButton" runat="server" OnClick="LogOut_Click" />
    </div>
        
    <asp:ContentPlaceHolder  ID="ContentPlaceHolder" runat="server">
    </asp:ContentPlaceHolder>
        
    <div runat="server" id="sideToolBox" class="side-toolbox">
        <ul class="navigation">
            <li>
                <asp:HyperLink ID="docLink" runat="server" NavigateUrl="#">
                    <img src="images/tool_icon_01.png" alt="Dokumentai" />
                </asp:HyperLink>
            </li>
            <li>
                <asp:HyperLink ID="formLink" runat="server" NavigateUrl="#">
                    <img src="images/tool_icon_02.png" alt="Formos" />
                </asp:HyperLink>
            </li>
            <li>
                <asp:HyperLink ID="settingLink" runat="server" NavigateUrl="~/settings.aspx">
                    <img src="images/tool_icon_03.png" alt="Nustatymai" />
                </asp:HyperLink>
            </li>
            <li>
                <asp:HyperLink ID="faqLink" runat="server" NavigateUrl="~/faq.aspx">
                    <img src="images/tool_icon_04.png" alt="D.U.K." />
                </asp:HyperLink>
            </li>
        </ul>
    </div>
    </form>
</body>
</html>

I place content which needs to be loaded only in few pages and only with exact permissions in <asp:PlaceHolder ID="menuPlaceHolder" runat="server"></asp:PlaceHolder>

Placeholder can be empty, and i can load content programatically there from any .aspx page in my project.

Continue example from my project:
I use setting.aspx.cs to load content to asp:PlaceHolder

Page.Master.FindControl("MenuPlaceHolder").Controls.Add(llinkHelper.GetLinkGroup("&(i+1).ToString&"));

llinkHelper.GetLinkGroup("&(i+1).ToString&") - is my function that i wrote.

In your case you`ll need to create new object for example div ant put your desirable content in innerHtml atributte.
Finally it would look like this

Page.Master.FindControl("asp:PlaceHolderID").Controls.Add(YourNewCreatedObjectName);

Hope it will help you. If not, write it down - you problem - we`ll try to help you. :)

Edited by Daniil T. on Aug 18, 2012 10:29 PM
Edited by Daniil T. on Aug 18, 2012 10:29 PM
Edited by Daniil T. on Aug 18, 2012 10:29 PM
Marked as answer by Catherine Shan - MSFT on Aug 23, 2012 07:22 AM

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Ruchira

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Re: Multiple content placeholders in masterpage

Aug 20, 2012 12:12 PM|LINK

Hello,

In simple terms, you cannot have more than one page for a masterpage. You can only have a one child page for a master page at a time. That's how it works. If you need to replace contentplaceholders like this, you have to use nested master page. But again, you can use only one child page.

Please 'Mark as Answer' if this post helps you.

My Tech blog | My YouTube Channel

Marked as answer by Catherine Shan - MSFT on Aug 23, 2012 07:22 AM

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madsoveniels...

Multiple content placeholders in masterpage

Daniil T.

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madsoveniels...

Re: Multiple content placeholders in masterpage

Daniil T.

Re: Multiple content placeholders in masterpage

madsoveniels...

Re: Multiple content placeholders in masterpage

Daniil T.

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Ruchira

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