在Repeater控件三元内嵌ASP.NET

问题描述

想象一下，我在的ItemTemplate 中继的名为readMore链接按钮，我想设置显示：无; 它，当每个岗位的含量小于说，2000个字符。

Imagine that I have a link button called "readMore" in the ItemTemplate of a repeater, and I want to set display: none; for it, when the content of each post is less than say, 2000 characters.

<asp:repeater id="postsRepeater" runat="server"
  onitemdatabound="postsRepeater_ItemDataBound">
    <ItemTemplate>
            <a class="button" href="#" runat='server' id='more'>Read More</a>
    </ItemTemplate>
</asp:repeater>

在PHP中，你可以简单地写类似：

In PHP, you can simply write something like:

<?php echo (contentLength < 2000 ? 'display: none;' : ''); ?>

不过，我测试code和它trowed和错误：

However, I tested this code and it trowed and error:

<%= Eval("Content").Length < 2000 ? "display: none;" : string.Empty %>

是否有可能写的三元内嵌在ASP.NET Repeater控件？怎么样？

Is it possible to write ternary inline ASP.NET in a Repeater control? How?

推荐答案

这不是三元运算符的问题;这是数据绑定的问题控件，因为你必须使用＃而不是 = 。

It is not an issue of ternary operator; it is an issue of Databound controls because you have to use # instead of =.

使用此

<%# Eval("Content").ToString().Length < 2000 ? "display: none;" : string.Empty %>

而不是

<%= Eval("Content").ToString().Length < 2000 ? "display: none;" : string.Empty %>

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