WebUserControl inside a ContentPlaceHolder of a MasterPage

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WebUserControl inside a ContentPlaceHolder of a MasterPage

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Last post 07-05-2009 2:42 PM by hasm. 7 replies.

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WebUserControl inside a ContentPlaceHolder of a MasterPage

07-04-2009, 7:25 AM

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point Member
hasm
Member since 07-23-2008, 9:46 AM
Posts 5

Hi,

I'm having some difficulty adding a WebUserControl inside a ContentPlaceHolder of a MasterPage, the return error displayed in the object is error creating control - regions1 unknown server tag 'uc1:regions'.

Master page code:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<title>Untitled Page</title>

<asp:ContentPlaceHolder id="head" runat="server">

</asp:ContentPlaceHolder>

.style1

{

width: 100%;

height: 100%;

}

.style2

{

width: 20%;

}

.style3

{

width: 516px;

}

</style>

</head>

<body>

<div>

<asp:ContentPlaceHolder id="ContentPlaceHolder1" runat="server">

<tr>

<asp:Image ID="imgHeader" runat="server" ImageUrl="~/images/Header_7.jpg" />

</td>

</tr>

<tr>

<asp:Image ID="imgMenu00" runat="server" ImageUrl="~/images/menu.gif" />

<br />

</td>

<asp:ScriptManager ID="ScriptManager1" runat="server">

</asp:ScriptManager>

<asp:UpdatePanel ID="UpdatePanel1" runat="server">

<asp:ContentPlaceHolder ID="ContentPlaceHolder2"

runat="server">

</asp:ContentPlaceHolder>

</ContentTemplate>

</asp:UpdatePanel>

<br />

</td>

<asp:Image ID="imgLeft" runat="server" ImageUrl="~/images/pub.gif"

style="margin-left: 0px" />

</td>

</tr>

<tr>

 </td>

</tr>

</table>

</asp:ContentPlaceHolder>

</div>

</form>

</body>

</html>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<title>Untitled Page</title>

<asp:ContentPlaceHolder id="head" runat="server">

</asp:ContentPlaceHolder>

.style1

{

width: 100%;

height: 100%;

}

.style2

{

width: 20%;

}

.style3

{

width: 516px;

}

</style>

</head>

<body>

<div>

<asp:ContentPlaceHolder id="ContentPlaceHolder1" runat="server">

<tr>

<asp:Image ID="imgHeader" runat="server" ImageUrl="~/images/Header_7.jpg" />

</td>

</tr>

<tr>

<asp:Image ID="imgMenu00" runat="server" ImageUrl="~/images/menu.gif" />

<br />

</td>

<asp:ScriptManager ID="ScriptManager1" runat="server">

</asp:ScriptManager>

<asp:UpdatePanel ID="UpdatePanel1" runat="server">

<asp:ContentPlaceHolder ID="ContentPlaceHolder2"

runat="server">

</asp:ContentPlaceHolder>

</ContentTemplate>

</asp:UpdatePanel>

<br />

</td>

<asp:Image ID="imgLeft" runat="server" ImageUrl="~/images/pub.gif"

style="margin-left: 0px" />

</td>

</tr>

<tr>

 </td>

</tr>

</table>

</asp:ContentPlaceHolder>

</div>

</form>

</body>

</html>

Default.aspx Code

<%@ Page Language="C#" MasterPageFile="~/masterPage/mp00.master" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" Title="Untitled Page" %>

<%@ Register src="regions.ascx" tagname="regions" tagprefix="uc1" %>

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

</asp:Content>

tanks in advanced for all your help.

Best reguards, hasm.

Filed under: "Asp.net 2.0 user control"

Re: WebUserControl inside a ContentPlaceHolder of a MasterPage

07-04-2009, 8:23 AM

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549 point Member
adeelehsan
Member since 07-18-2005, 10:56 AM
UAE
Posts 94

Hello

It is always recommended to keep the content place holders in the master page empty, which you want to use in the content pages. If you want to put something in the master page, put it either before the content place holder or after it.

Because when you use the content place holder in the content page, you are actually overwriting it. So the contents specified in the content page will be displayed on the page.

Please Mark AS Answer if it helped.
Regards
ADEEL EHSAN

Filed under: Asp.net2.0

Re: WebUserControl inside a ContentPlaceHolder of a MasterPage

07-04-2009, 8:39 AM

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26 point Member
Bruno Podetti
Member since 07-02-2009, 7:32 AM
Posts 3

You need to register your WebUserControl in the master page with placing the following at the beginning of the file.

<%@ Register src="regions.ascx" tagname="regions" tagprefix="uc1" %>

Then you could use it in the master. But normally you leave the contentplaceholder empty, only when you like having default content for some content pages.

Re: WebUserControl inside a ContentPlaceHolder of a MasterPage

07-04-2009, 9:21 AM

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point Member
hasm
Member since 07-23-2008, 9:46 AM
Posts 5

Hi,

Tanks, for the reply.

I think i didn't explain my self correctly, what i'm, trying to do is, insert a webusercontrol that i have made, into a aspx page that has a master page, so i drag the webusercontrol into the contentplaceholder that my aspx page has, that comes from the master page, and then it displays the error :error creating control -regions1 unknown server tag 'uc1:regions'.

Re: WebUserControl inside a ContentPlaceHolder of a MasterPage

07-04-2009, 9:37 AM

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point Member
hasm
Member since 07-23-2008, 9:46 AM
Posts 5

Hi,

The problem is when i try to drag the webusercontrol into the my aspx page that has a master page with a contentplaceholder.

thanks in advanced.

Re: WebUserControl inside a ContentPlaceHolder of a MasterPage

07-05-2009, 1:35 PM

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point Member
hasm
Member since 07-23-2008, 9:46 AM
Posts 5

Hi,

Can anybody help me?

Tanks i advanced.

Hasm

Re: WebUserControl inside a ContentPlaceHolder of a MasterPage

07-05-2009, 2:31 PM

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9,211 point Star
srinivaskotra
Member since 05-28-2009, 10:11 AM
Hyderabad
Posts 1,470

Hi,

it is better leave contentplace holder for empty for child page. this is a sample code of master page. you try like this

<body>
    <form id="form1" runat="server">
        <div>
            <table border="1" cellpadding="0" cellspacing="0" width="100%" style="table-layout: fixed"
                rules="all">
                <tr>
                    <td colspan="2" align="center"><!-header->
                        here you can place your control</td>
                </tr>

                <tr><asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
                        </asp:ContentPlaceHolder>
     <td></td></tr>

                <tr>
                    <td colspan="2">
                        Footer</td>
                </tr>
            </table>
        </div>
    </form>
</body>