Question

我在VS 2008中创建了一个简单的Web应用程序项目。我添加了一个母版页面。然后我添加了两个面板。在每个面板中，我添加了一个ContentPlaceHolder。我为每个ContentPlaceHolder添加了一个ContentPage。

当我使用Vs 2008内部Web服务器运行它时，不会显示任何内容持有者页面。有帮助吗？我怀疑我做的事情从根本上是错误的。

感谢。

以下是代码：

<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Site1.master.cs" Inherits="WebApplication5.Site1" %>

<!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">
    <asp:Panel ID="Panel1" runat="server" Height="300px" Width="200px" Style="z-index: auto;
        left: 0px; top: 0px; position: absolute">
        <asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
        </asp:ContentPlaceHolder>
    </asp:Panel>
    <asp:Panel ID="Panel2" runat="server" Height="300px" Width="200px" Style="z-index: auto;
        left: 205px; top: 0px; position: absolute">
        <asp:ContentPlaceHolder ID="ContentPlaceHolder2" runat="server">
        </asp:ContentPlaceHolder>
    </asp:Panel>
    </form>
</body>
</html>




<%@ Page Title="" Language="C#" MasterPageFile="~/Site1.Master" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication5.WebForm1" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
Content Page 1
</asp:Content>
<asp:Content ID="Content3" ContentPlaceHolderID="ContentPlaceHolder2" runat="server">
</asp:Content>





<%@ Page Title="" Language="C#" MasterPageFile="~/Site1.Master" AutoEventWireup="true" CodeBehind="WebForm2.aspx.cs" Inherits="WebApplication5.WebForm2" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
</asp:Content>
<asp:Content ID="Content3" ContentPlaceHolderID="ContentPlaceHolder2" runat="server">
Content Page 2
</asp:Content>

Answer 1

愚蠢的问题：你有这个设置吗？

，您应该有两个<asp:ContentPlaceHolder>具有单独的ID，例如

<asp:ContentPlaceHolder id="placeHolder1" runat="server" />

和

<asp:ContentPlaceHolder id="placeHolder2" runat="server" />

（基于该母版页），您应该<asp:Content>引用母版页中定义的适当占位符：

<asp:Content id="content1" ContentPlaceholderID="placeHolder1" runat="server">
   ....
</asp:Content>

和

<asp:Content id="content2" ContentPlaceholderID="placeHolder2" runat="server">
   ....
</asp:Content>

你有这个吗？这应该是真的。因此，当您在浏览器中显示实际数据页面时，您肯定会看到一些内容....

Answer 2

确保您的ContentPlaceHolder和内容代码都有runat="server"。

Answer 3

以下是代码：

<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Site1.master.cs" Inherits="WebApplication5.Site1" %>

<!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">
    <asp:Panel ID="Panel1" runat="server" Height="300px" Width="200px" Style="z-index: auto;
        left: 0px; top: 0px; position: absolute">
        <asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
        </asp:ContentPlaceHolder>
    </asp:Panel>
    <asp:Panel ID="Panel2" runat="server" Height="300px" Width="200px" Style="z-index: auto;
        left: 205px; top: 0px; position: absolute">
        <asp:ContentPlaceHolder ID="ContentPlaceHolder2" runat="server">
        </asp:ContentPlaceHolder>
    </asp:Panel>
    </form>
</body>
</html>




<%@ Page Title="" Language="C#" MasterPageFile="~/Site1.Master" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication5.WebForm1" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
Content Page 1
</asp:Content>
<asp:Content ID="Content3" ContentPlaceHolderID="ContentPlaceHolder2" runat="server">
</asp:Content>





<%@ Page Title="" Language="C#" MasterPageFile="~/Site1.Master" AutoEventWireup="true" CodeBehind="WebForm2.aspx.cs" Inherits="WebApplication5.WebForm2" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
</asp:Content>
<asp:Content ID="Content3" ContentPlaceHolderID="ContentPlaceHolder2" runat="server">
Content Page 2
</asp:Content>

母版页中的多个内容持有者

3 个答案: