如何创建/使用的一种形式和模型粘合剂从View =＆GT通过收藏;调节器 [英] How do I create/use a form and model-binder to pass collections from View => Controller

问题描述

我有一个MVC 4剃刀查看我通过视图模型与用户的集合和实体的集合。

I have an MVC 4 Razor view that I passed a view model with a collection of User and a collection of Entities.

有关这个问题的目的，让我们说我想要一个新的用户添加到每个实体。所以，我有，你输入用户名，然后该用户名和实体被发送到一个控制器方法的文本域 ADDUSER（用户用户的IEnumerable＆LT;实体＆GT;经济需求测试）
这种方法可以替代地 ADDUSER（长用户ID，IEnumerable的＆LT; TPkey＆GT;键）。 ADDUSER 得到用户和实体和需要照顾添加用户到每个实体取值

For the purposes of this question, let's say I'm trying to add a new User to each of the Entities. So I have a text form field where you enter a username and then the that username and the entities is sent to a controller method AddUser(User user, IEnumerable<Entity> ents) this method could alternatively be AddUser(long UserId, IEnumerable<TPkey> keys). AddUser gets the User and Entitys and takes care of adding the User to each of the Entitys

所以，我应该如何去传递的的IEnumerable＆LT; TPkey＆GT; 到控制器的方法

So, how should I go about passing the the IEnumerable<TPkey> to the controller method?

这是也有些由该控制器需要处理不同类型的主键的事实复杂化了。

This is also somewhat complicated by the fact that the the controller needs to handle different types of primary keys.

现在我这样做：

    @using (Html.BeginForm("AddUser", ViewContext.RouteData.Values["Controller"].ToString()))
    {

        <label for="user"> Username (or Email) to grant access:</label>
        <input type="text" name="user" />
        <input type="submit" value="Grant Access" />

        foreach (var item in Model.Entities)
        {
            <input type="hidden" name="keys" value="@item.PKey" />
        }
    }

这是否有意义？我想preFER使用过的钥匙控制器的更强类型的方法是，因为现在我在做钥匙串的一些粗略的分析，我会preFER要能森过强/通用类型的对象。

Does that make sense? I would prefer to be using a more strongly typed method of passing the keys to the controller, because right now I'm having to do some sketchy parsing of the string of keys, and I would prefer to be able to sen over a strongly/generic typed object.

推荐答案

要列出是另一个类的对象集合的模型属性，试试这个：

To list a model property that is a collection of objects of another class, try this:

Class Person {
   public int id {get; set;}
   public string name {get; set;}
   public List<Car> Cars {get; set;}
}

Class Car {
   public int id {get; set; }
   public string name {get; set;}
}

在视图中，必须列出从person对象车上对象与属性名和索引中指定的输入

in view, you must list the car objects from person object as inputs named with the property name and a index

 @using (Html.BeginForm("AddUser", ViewContext.RouteData.Values["Controller"].ToString()))
    {

        <label for="name"> </label>
        <input type="text" name="name" />



int counter = 0;

foreach (var item in Model.Entities)
    {
        <input type="hidden" name="Cars[@counter.ToString()].id" value="@item.PKey" />
        <input type="hidden" name="Cars[@counter.ToString()].name" value="@item.name" />

        counter++;
    }

        <input type="submit" value="Grant Access" />
    }

使用这个工具，你的模型从形式

Using this, your model automatically populate the property Cars with the inputs sent from the form

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