ASP MVC 3：我怎样才能做一个选择列表客户端验证？ [英] ASP MVC 3: How can I do Client side Validation on a Select List?

问题描述

在这里读了几个问题/答案后，我设法解决如何选择列表添加到表单并用数据填充它，像这样：

After reading a few question/answers here I have managed to work out how to add a Select list to a form and fill it with data, like so:

@Html.DropDownList("S", new SelectList(ViewBag.S, "Id", "Nme"), "-- Sel a S --")

和它完美的作品。不过，我想补充一些的客户端验证的验证用户是否选择一个选项，而不是在默认离开它。

And it works perfectly. However I would like to add some client-side Validation To validate whether the user has selected an option and not left it at the Default.

我用自带的MVC 3，所以presumably我必须做​​一些与HTML.ValidationMessage，但什么标准的jQuery的东西吗？

I'm using the standard jquery stuff that comes with mvc 3, so presumably I have to do something with HTML.ValidationMessage, but what?

和不能为我的生活工作方式。

And Can't for the life of me work out how.

TIA。

好吧，我不得不通过其在JQuery的土地如何做到一看，通过添加htmlattribute像这样刚刚找到：

Ok I had a look through how its done in JQuery land and found just by adding an htmlattribute like so:

new {@class='required'}

我Html.DropDownList声明，并添加validationMessage，解决了这个问题对我来说。

to my Html.DropDownList statement, and adding validationMessage, fixes the problem for me.

推荐答案

如果您正在使用jQuery验证，那么你可以简单地添加发票一式的CSS类和有DropDownList中所要求的验证，所提供的默认值是空的。

If you are using the jquery validation then you may simply add the css class reuired and have the required validation for the dropdownlist, provided the default value is empty.

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