我怎样才能绑定嵌套从View的ViewModels到控制器在MVC3? [英] How can I bind nested ViewModels from View to Controller in MVC3?
问题描述
我开发在C#中的ASP.NET MVC 3应用程序,我用剃刀。我现在处理涉及的对象穿过的ViewModels的绑定问题/收到/从视图的控制器。
让我们说清楚。我有以下的ViewModels:
I am developing an ASP.NET MVC 3 application in C# and I use Razor. I am now dealing with a problem concerning the binding of objects through ViewModels passed/received to/from the View by the Controller. Let's make it clear. I have the following ViewModels:
public class ContainerViewModel
{
public int ContainerId {get; set;}
public string ContainerName {get; set;}
public List<ItemPostModel> ItemData {get; set;}
}
public class ItemPostModel
{
public int ItemId {get; set;}
public string ItemName {get; set;}
public int ItemValue {get; set;}
}
在 ContainerViewModel 用于将数据传递给视图。其性能 ContainerId 和容器名称使用只是为了显示目的。在 列表&LT; ItemPostModel&GT;
酒店有权使用的表格来填补。视图看起来是这样的(这是一个简化版本):
The ContainerViewModel is used to pass the data to the View. Its properties ContainerId and ContainerName are used just for display purposes. The List<ItemPostModel>
property has to be filled using a Form. The View looks something like this (it is a simplified version):
<strong>@Model.ContainerName</strong>
@using (Html.BeginForm())
{
<fieldset>
@foreach(var item in Model.ItemData)
{
@Html.TextBox(item.ItemId);
@Html.TextBox(item.ItemName);
@Html.TextBox(item.ItemValue);
<p>
<input type="submit" value="Save" />
</p>
}
</fieldset>
}
在控制器相应的操作方法如下:
public ActionResult UpdateItems()
{
//fill in the ContainerViewModel lcontainer
return View("UpdateItems", lcontainer);
}
[HttpPost]
public ActionResult UpdateItems(int containerId, ItemPostModel itemData)
{
//store itemData into repository
}
问题是,这个code在 ItemPostModel的ItemData STRONG>传递给发表ActionMethod UpdateItems 总是空空的。在 containerId 正确传递。同样的结果,如果我用下面的code。在控制器(显然不是DRY);
The problem is that with this code the ItemPostModel itemData passed to the Post ActionMethod UpdateItems is always empty. The containerId is correctly passed. Same result if I use the following code in the Controller (obviously not DRY);
[HttpPost]
public ActionResult UpdateItems(ContainerViewModel container)
{
//extract itemData from ContainerViewModel container
//store itemData into repository
}
我怎么能教的,我想存储在 列表&LT表单元素的应用; ItemPostModel&GT;
?我将修改 ModelBinder的或有一个更简单执行此任务的方法吗?谢谢大家对你的答案。
How can I "teach" the application that I want the form elements stored in the List<ItemPostModel>
? Shall I modify the ModelBinder or there is a simpler way to perform this task? Thanks everybody for your answers.
推荐答案
不要写在视图中循环。使用的编辑器模板:
Don't write loops in a view. Use editor templates:
<strong>@Model.ContainerName</strong>
@using (Html.BeginForm())
{
<fieldset>
@Html.EditorFor(x => x.ItemData)
<input type="submit" value="Save" />
</fieldset>
}
和相应的编辑模板内(〜/查看/共享/ EditorTemplates / ItemPostModel.cshtml
)
and inside the corresponding editor template (~/Views/Shared/EditorTemplates/ItemPostModel.cshtml
):
@model ItemPostModel
@Html.TextBox(x => x.ItemId)
@Html.TextBox(x => x.ItemName)
@Html.TextBox(x => x.ItemValue)
和控制器中的动作则可能需要指定preFIX:
And in the controller action you might need to specify the prefix:
[HttpPost]
public ActionResult UpdateItems(
int containerId,
[Bind(Prefix = "ItemData")]ItemPostModel itemData
)
{
//store itemData into repository
}
这应该是pretty所有得多。编辑模板将产生正确的输入字段名的绑定工作照顾。
and that should be pretty much all. The editor template will take care of generating the proper input field names for the binding to work.
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