ASP.NET MVC 3:具体实现输出特定视图 [英] ASP.NET MVC 3: Output specific view for concrete implementation
问题描述
我有一个IEnumerable基本类型,因为我的模型。
I have an IEnumerable of a base type as my model.
我需要根据具体类型是什么在一个列表中显示的HTML不同的位
I need to display a different bit of HTML in a list depending on what the concrete type is.
所以,最终名单可能类似于此HTML中:
So the resulting list might look similar to this in HTML:
<ul>
<li class="points">Points - Item 1 - 10 points <a href="#">Remove</a></li>
<li class="media">Media - Item 2 - your_uploaded_image.jpg <a href="#">Remove</a></li>
<li class="content">Content - Item 3 <a href="#">Remove</a></li>
</ul>
这是可能我会另一种类型添加到这个后来让解决方案,如下面的是不是真的我后。
It's likely I will add another type to this later so solutions like the following aren't really what I'm after.
@foreach(var item in Model)
{
if(item is PointImpl)
{
var pointItem = item as PointImpl;
<li class="points">Points - @pointItem.Name - @pointItem.Points points <a href="#">Remove</a></li>
}
else if(item is MediaImpl)
{
var mediaItem = item as MediaImpl;
<li class="media">Media - @mediaItem.Name - @mediaItem.FileName <a href="#">Remove</a></li>
}
/*
More implementations
*/
}
我看了一下模型元数据模板提示但这并不能真正帮助,因为我的模型是一个IEnumerable ..
I've had a look at model metadata template hint but that doesn't really help because my model is an IEnumerable..
我在想一个自定义的HTML帮助寻找的具体类型的属性,但认为有可能是一个建在这样的方式?
I was thinking about a custom Html Helper looking at an attribute on the concrete type but think there might be a built in way of doing this?
推荐答案
而不是丑陋的的foreach
只需使用显示模板:
Instead of the ugly foreach
simply use display templates:
@model IEnumerable<SomeBaseViewModel>
<ul>
@Html.DisplayForModel()
</ul>
,然后定义显示模板所有子类型。例如:
and then define display templates for all child types. For example:
〜/查看/共享/ DisplayTemplates / PointImpl.cshtml
:
@model PointImpl
<li class="points">
Points - @Model.Name - @Model.Points points
<a href="#">Remove</a>
</li>
和〜/查看/共享/ DisplayTemplates / MediaImpl.cshtml
:
@model MediaImpl
<li class="media">
Media - @Model.Name - @Model.FileName
<a href="#">Remove</a>
</li>
请参阅,没有更多的如果,没有更多的循环,没有更多的增值经销商。一切工作按照惯例(模板必须位于〜/查看/共享/ DisplayTemplates
或〜/查看/ SomeController / DisplayTemplates
文件夹,并应命名为具体类型的名称 - PointImpl.cshtml
, MediaImpl.cshtml
。 ..)。根据具体类型相应显示模板将被渲染,这会自动为主要模型集合的每个元素
See, no more ifs, no more loops, no more vars. Everything works by convention (templates must be situated in the ~/Views/Shared/DisplayTemplates
or ~/Views/SomeController/DisplayTemplates
folder and should be named as the name of the concrete type - PointImpl.cshtml
, MediaImpl.cshtml
, ...). Based on the concrete type the corresponding display template will be rendered and this automatically for each element of the main model collection.
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