使用 Razor MVC3 的条件 HTML 属性 [英] Conditional HTML Attributes using Razor MVC3
问题描述
变量 strCSSClass 通常有一个值,但有时为空.
The variable strCSSClass often has a value but sometimes is empty.
我不想在这个输入元素的 HTML 中包含一个空的 class="",这意味着如果 strCSSClass 是空的,我根本不需要 class= 属性.
I do not want to include an empty class="" in this input element's HTML, which means if strCSSClass is empty, I don't want the class= attribute at all.
以下是执行条件 HTML 属性的一种方法:
The following is one way to do a conditional HTML attribute:
<input type="text" id="@strElementID" @(CSSClass.IsEmpty() ? "" : "class=" + strCSSClass) />
有没有更优雅的方法来做到这一点?具体来说,我可以遵循与元素其他部分相同的语法: class="@strCSSClass" ?
Is there a more elegant way of doing this? Specifically one where I could follow the same syntax as is used in the other parts of the element: class="@strCSSClass" ?
推荐答案
你不是从我这里听到的,我是 Razor 的 PM,但在 Razor 2(网页 2 和 MVC 4)中,我们将构建条件属性进入 Razor(截至 MVC 4 RC 测试成功),所以你可以这样说......
You didn't hear it from me, the PM for Razor, but in Razor 2 (Web Pages 2 and MVC 4) we'll have conditional attributes built into Razor(as of MVC 4 RC tested successfully), so you can just say things like this...
<input type="text" id="@strElementID" class="@strCSSClass" />
如果 strCSSClass 为 null,则 class 属性根本不会呈现.
If strCSSClass is null then the class attribute won't render at all.
SSHHH...别说.:)
SSSHHH...don't tell. :)
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