网页中包含一个或多个与母板页中的<asp:ContentPlaceHolder>空间不对应的<asp:content>这是为什么
母板页为:<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Site1.master.cs" Inherits="bb.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">
<meta http-equiv="Content-Type" content="text/html"/>
<title></title>
<asp:Content ID="Content" ContentPlaceHolderID="ContentPlaceHolder" runat="server">
</asp:ContentPlaceHolder>
</head>
<body>
<form runat="server">
<div>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
</asp:ContentPlaceHolder>
</div>
</form>
</body>
</html>
内容页:
<%@ Page Language="C#" MasterPageFile="~/Site1.Master" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="bb.WebForm1" Title="无标题页" %>
<asp:Content ID="HeaderContent" ContentPlaceHolderID="HeaderContent" runat="server">
</asp:Content>
<asp:Content ID="BodyContent" ContentPlaceHolderID="MainContent" runat="server">
<asp:Button ID="Button1" runat="server" Text="递增显示数字" CommandName="Show Number_Asc" CommandArgument="Asc" OnCommand="Button_Command"></asp:Button>
<asp:Button ID="Button2" runat="server" Text="递减显示数字" CommandName="Show Number_Desc" CommandArgument="Desc" OnCommand="Button_Command"></asp:Button>
</asp:Content>