lblmessage在当前上下文中不存在

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请帮帮我.. 标签在UI中有id ..但在代码后面如果我使用标签的id ...它是显示错误说lblmessage在当前上下文中不存在..

please help me out.. The label has id in the UI.. but in code behind if i use the id of label...it is showing error saying lblmessage doesn''t exist in the current context..

<asp:Label runat="server" ID="lblMessage" Text="" class="multi">

如果我在后面的代码中使用上面的id我得到错误

if i use the above id in code behind am getting error

lblMessage.Text += fileName + "Uploaded";

推荐答案

您可能缺少结束标记：你有没有删除结尾的斜杠？ Probably, you are missing the closing tag: Have you deleted the slash from the end? <asp:Label runat="server" ID="lblMessage" Text="" class="multi">

成为

Becomes

<asp:Label runat="server" ID="lblMessage" Text="" class="multi"/>

如果您没有错过结束标签检查是否啦bel具有与您尝试在.cs文件中使用的相同ID。 否则删除此添加新标签给它一个不同的名称'''并构建解决方案，之后使用它。 cs文件 if you are not missing the closing tag check if label has same id as you are trying to use in .cs file. otherwise delete this add a new label give it a different name '''' and build the solution and after that use it in .cs file

构建您的网站，然后在代码后面使用标签。有时它可以工作。 build your website once then use label in code behind. sometimes it works.