用剃刀MVC3条件HTML属性 [英] Conditional HTML Attributes using Razor MVC3

问题描述

变量strCSSClass往往有一个值，但有时是空的。

The variable strCSSClass often has a value but sometimes is empty.

我不希望包括空类=在此输入元素的HTML，这意味着如果strCSSClass是空的，我不希望类=属性都没有。

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.

下面是做一个有条件的HTML属性的一种方式：

The following is one way to do a conditional HTML attribute:

<input type="text" id="@strElementID" @(CSSClass.IsEmpty() ? "" : "class=" + strCSSClass) />

是否有这样做的更优雅的方式？具体来说之一，我可以按照相同的语法元素中的其他部分使用：类=@ 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

您没听到我的心声，为剃刀的PM，但在剃刀2（网页2和MVC 4）我们必须条件属性建到剃须刀（如MVC 4 RC的测试成功），所以你只能说这样的事情...

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，则类属性将不会呈现在所有。

If strCSSClass is null then the class attribute won't render at all.

SSSHHH ......不要告诉。 ：）

SSSHHH...don't tell. :)

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