编译器错误消息：CS0103：当前上下文中不存在名称“Test1”

Question

I am completely new to programming in ASP.NET and do not understand why the error "Compiler Error Message: CS0103: The name 'Test1' does not exist in the current context" occurs on this basic piece of code. 我对ASP.NET中的编程完全不熟悉，并且不理解为什么错误“编译器错误消息：CS0103：名称'Test1'在当前上下文中不存在”出现在这个基本代码段上。

Below is the code that I am trying to compile - 下面是我要编译的代码 -

<%@ Page Language="C#" AutoEventWireup="true" %>

<!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>Untitled Page</title>

</head>

<body>
<form id="form1" runat="server">
<div>

<asp:Label ID="Test1"/></asp>

<script runat="server">
 protected void Page_Load(object sender, EventArgs e)
{
Test1.Text = "Hello World; the time is now" + DateTime.Now.ToString();
}
</script>

</div>
</form>

</body>
</html>

Any assistance on why I'm receiving this error message would be greatly appreciated. 有关我收到此错误消息的原因的任何帮助将不胜感激。

Answer 1

You need to include the runat="server" attribute on your asp control, otherwise your code-behind does not recognize it. 您需要在asp控件上包含runat="server"属性，否则您的代码隐藏无法识别它。

Note, you can add this attribute to plain html elements as well. 注意，您也可以将此属性添加到纯HTML元素中。

<label id="myLabel" runat="server">text</label>

myLabel.InnerText = "stuff";

Answer 2

In addition to including the runat tag, you didn't close the tag correctly 除了包含runat标记之外，您没有正确关闭标记

<asp:Label runat="server" ID="Test1"></asp:Label>

or 要么

<asp:Label runat="server" ID="Test1"/>

编译器错误消息：CS0103：当前上下文中不存在名称“Test1”

问题描述

2 个解决方案

解决方案1
2 已采纳 2013-03-25 22:05:20

解决方案2
2 2013-03-25 22:07:55

编译器错误消息：CS0103：当前上下文中不存在名称“Test1”

问题描述

2 个解决方案

解决方案1 2 已采纳 2013-03-25 22:05:20

解决方案2 2 2013-03-25 22:07:55

解决方案1
2 已采纳 2013-03-25 22:05:20

解决方案2
2 2013-03-25 22:07:55