@ Html.DropDownList宽度 [英] @Html.DropDownList width

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本文介绍了@ Html.DropDownList宽度的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

问:如何为@ Html.DropDownList宽度(而不是CSS)?

  @ Html.DropDownList(ListId的String.Empty,新{风格=宽度:250像素;})!@ *没有去* @


解决方案

DropDownList的助手必须是的IEnumerable< SelectListItem> 。您传递一个字符串(空单更precise)。因此,为了使用这个帮助你必须尊重其签名:

  @ Html.DropDownList(
    ListId
    Enumerable.Empty< SelectListItem>()
    新{风格=宽度:250像素; }

显然产生一个空的下拉列表中很少使用。你可能有一个视图模型(你应该的方式)要使用绑定到:

  @ Html.DropDownList(
    ListId
    Model.MyList,
    新{风格=宽度:250像素; }

当然,因为你有一个视图模型,你应该preFER使用 DropDownListFor 助手:

  @ Html.DropDownListFor(
    X => x.ListId,
    Model.MyList,
    新{风格=宽度:250像素; }

最后,以避免与风格弄乱你的HTML,你应该使用一个外部CSS:

  @ Html.DropDownListFor(
    X => x.ListId,
    Model.MyList,
    新{@class =mycombo}

其中外部CSS,你会定义 .mycombo 规则:

  .mycombo {
    宽度:250像素;
}

现在你有什么,我认为正确的code。

Q: How to set width for @Html.DropDownList (and not in css)?

@Html.DropDownList("ListId", String.Empty, new {style="width: 250px;"})  @* no go!*@

解决方案

The second argument of the DropDownList helper must be an IEnumerable<SelectListItem>. You are passing a string (an empty one to be more precise). So in order to use this helper you will have to respect its signature:

@Html.DropDownList(
    "ListId", 
    Enumerable.Empty<SelectListItem>(), 
    new { style = "width: 250px;" }
)

Obviously generating an empty dropdown list is of little use. You probably have a view model (you should by the way) that you want to use to bind to:

@Html.DropDownList(
    "ListId", 
    Model.MyList, 
    new { style = "width: 250px;" }
)

and of course because you have a view model you should prefer to use the DropDownListFor helper:

@Html.DropDownListFor(
    x => x.ListId, 
    Model.MyList, 
    new { style = "width: 250px;" }
)

and finally to avoid cluttering your HTML with styles you should use an external CSS:

@Html.DropDownListFor(
    x => x.ListId, 
    Model.MyList, 
    new { @class = "mycombo" }
)

where in your external CSS you would define the .mycombo rule:

.mycombo {
    width: 250px;
}

Now you have what I consider a proper code.

这篇关于@ Html.DropDownList宽度的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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