非顺序集合绑定 [英] Non-sequential collection binding

问题描述

将 MVC 视图中动态创建的元素集合绑定到 MVC 4 中的集合的最佳方法是什么.我知道以前的版本要求元素如下所示:

What is the best way to bind a dynamically created collection of elements in an MVC view to a collection in MVC 4. I know previous versions have required that the elements look like this:

<input name="Categories[0].CategoryID" type="hidden" value="123" />
<input name="Categories[0].CategoryName" type="hidden" value="Music" />
<input name="Categories[1].CategoryID" type="hidden" value="456" />
<input name="Categories[1].CategoryName" type="hidden" value="Movies" />

但是当您动态添加新元素并删除它们时，事情很快就会变得混乱.

But when you are dynamically adding new elements and removing them, things get out of sequence pretty quickly.

MVC 4 是否添加了一种绑定到非顺序集合的方法?

Does MVC 4 add a way to bind to a non-sequential collection?

推荐答案

从 MVC2 开始支持非顺序集合索引，您只需要一个单独的隐藏字段，它将保存具有 name 架构的索引:CollectionName.Index:

Non sequential collection indices supported since MVC2 you just need to have a separate hidden field which will hold the index with the name schema: CollectionName.Index:

例如:

<input type="hidden" name="Categories.Index" value="3" />
<input name="Categories[3].CategoryID" type="hidden" value="123" />
<input name="Categories[3].CategoryName" type="hidden" value="Music" />

<input type="hidden" name="Categories.Index" value="1" />
<input name="Categories[1].CategoryID" type="hidden" value="456" />
<input name="Categories[1].CategoryName" type="hidden" value="Movies" />

您可以在此处找到有关该主题的更多信息:模型绑定到列表

You can find more info about the topic here: Model Binding To A List

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