VS 2010 produces Validation error
Question
I Just crate a new WebApplication project, and from site.master is the code
<%@ Master Language="VB" AutoEventWireup="false" CodeBehind="Site.master.vb" Inherits="WebTestApp.Site" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head runat="server">
<title></title>
<link href="~/Styles/Site.css" rel="stylesheet" type="text/css" />
<asp:ContentPlaceHolder ID="HeadContent" runat="server">
</asp:ContentPlaceHolder>
</head>
<body>
<form runat="server">
<div class="page">
<div class="header">
<div class="title">
<h1>
My ASP.NET Application
</h1>
</div>
<div class="loginDisplay">
<asp:LoginView ID="HeadLoginView" runat="server" EnableViewState="false">
<AnonymousTemplate>
[ <a href="~/Account/Login.aspx" ID="HeadLoginStatus" runat="server">Log In</a> ]
</AnonymousTemplate>
<LoggedInTemplate>
Welcome <span class="bold"><asp:LoginName ID="HeadLoginName" runat="server" /></span>!
[ <asp:LoginStatus ID="HeadLoginStatus" runat="server" LogoutAction="Redirect" LogoutText="Log Out" LogoutPageUrl="~/"/> ]
</LoggedInTemplate>
</asp:LoginView>
</div>
<div class="clear hideSkiplink">
<asp:Menu ID="NavigationMenu" runat="server" CssClass="menu" EnableViewState="false" IncludeStyleBlock="false" Orientation="Horizontal">
<Items>
<asp:MenuItem NavigateUrl="~/Default.aspx" Text="Home"/>
<asp:MenuItem NavigateUrl="~/About.aspx" Text="About"/>
</Items>
</asp:Menu>
</div>
</div>
<div class="main">
<asp:ContentPlaceHolder ID="MainContent" runat="server"/>
</div>
<div class="clear">
</div>
</div>
<div class="footer">
</div>
</form>
</body>
</html>
The asp:Content which is inside the head works fine (without Validation Error)
All the other asp: controls gives me the error
Warning 13 Validation (): Element 'contentplaceholder' is not supported.
And that hppen in all controls (not only in the ContentPlaceHolder).
Of course the same issue I'm face in the Default.aspx file.
2 answers
solution1
1 ACCPTED 2013-08-14 17:00:24
Resolving "Validation (): Element 'xxxx' is not supported" warning in Visual Studio 2005/2008
Delete the files from “C:\\Documents and Settings[Username]\\Application Data\\Microsoft\\VisualStudio\\9.0\\ReflectedSchemas” folder (or “…\\VisualStudio\\8.0\\…” if running Visual Studio 2005) in Windows XP. In Windows 7 it is under "C:\\Users{User Profile}\\AppData\\Roaming\\Microsoft...etc". Remember also the "VisualStudio" part of the path will be different depending on the version installed.
solution2
0 2013-08-14 02:12:32
please post your code including the default page. Check also your default.aspx if the content place holder matched with the place holders on the master page.
hope it helps.
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