我只有一个“Default.aspx”页面和一个 ListView 控件。为什么我会收到此错误。以前从未发生过
“必须在 ListView 'ListView1' 上指定项目占位符。通过将控件的 ID 属性设置为“itemPlaceholder”来指定项目占位符。项目占位符控件还必须指定 runat="server"。"
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="TesterConcepts._Default"%>
<!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>
</head>
<body>
<form id="form1" runat="server">
<div>
</div>
<asp:ObjectDataSource ID="ObjectDataSource1" runat="server"
onselecting="ObjectDataSource1_Selecting" SelectMethod="GetItemsCollection"
TypeName="TesterConcepts.CutomDataSource">
<SelectParameters>
<asp:Parameter Name="items" Type="Object" />
</SelectParameters>
</asp:ObjectDataSource>
<asp:ListView ID="ListView1" runat="server" DataSourceID="ObjectDataSource1"
onselectedindexchanged="ListView1_SelectedIndexChanged">
</asp:ListView>
</body>
</html>
这样做甚至没有帮助
<asp:ListView ID="ListView1" runat="server" DataSourceID="ObjectDataSource1"
OnSelectedIndexChanged="ListView1_SelectedIndexChanged"
ItemPlaceholderID="PlaceHolder1">
</asp:ListView>
<asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder>
现在它抛出这个异常
“必须在 ListView 'ListView1' 上指定项目占位符。通过将控件的 ID 属性设置为“PlaceHolder1”来指定项目占位符。项目占位符控件还必须指定 runat="server""