ASP.net 内联表达式问题 [英] ASP.net Inline Expression Issue

问题描述

我似乎无法弄清楚为什么这在下面不起作用.我需要将文本框绑定到内联表达式中的值.看起来是件很简单的事情吧?但这些都不起作用.有任何想法吗?提前致谢.

I can't seem to figure out why this does not work below. I need to bind the text box to a value from an inline expression. Seems like a simple thing right? But neither of these work. Any ideas? Thanks in advance.

<asp:textbox id="tbName" runat="server" Text='<%# Eval("test") %>' />
<asp:textbox id="tbName" runat="server" Text='<%= "test" %>' />

我应该提到，这个页面没有背后的代码，只有顶部的以下指令.

I should mention that this page has no code behind and only the following directives at the top.

<%@ Import Namespace="System" %>
<%@ Import Namespace="System.Web" %>
<%@ Page Language="C#" %>

我能想到的唯一可行的解​​决方案是添加一个内联服务器脚本，就像这个一样.我希望我知道为什么除非您处于数据绑定上下文中，否则内联表达式将不起作用.

The only workable solution that I could come up with short of adding a code behind is adding an inline server script, like this one. I wish I knew why the inline expressions won't work unless you're in a data binding context.

<script language="C#" runat="server"> 
   private void Page_Load(object sender, System.EventArgs e)
    {
      tbName.Text = "test";
    }
</script>

推荐答案

在 Page_Load 中你将不得不为

In the Page_Load of you will have to make a call to Page.DataBind() for

<asp:textbox id="tbName" runat="server" Text='<%# Eval("test") %>' />

上班.

<%= %> 是缩短的 response.Write() 并且对于任何服务器标记永远不会作为属性有效.

<%= %> is a shortened response.Write() and is never valid as an attribute, for any server tag.

<%# %> 可以使用，仅当容器是数据绑定的(在您的情况下为页面).

<%# %> can be used, only if the conatainer is databound (the page in your case).

<%$ %> 可用于访问资源文件中的数据.

<%$ %> can be used to access data in resources files.

您还可以查看 如何在标记中绑定"标签的文本属性 这是一个类似的问题.

You can also take a look at How to 'bind' Text property of a label in markup which is a smimilar question.

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