如何从Asp.Net MVC中的复杂视图中最佳地检索数据

Question

我有一个复杂的模型

public class Person
{
    public int Id{get;set;}
    public string Name{get; set;}
     public virtual Address Address { get; set; }
}

public class Address
{
    public int Id{get; set;}
    public string State{get; set;}
}

在我的编辑视图中，我显示了Address.State

@Html.EditorFor(model => model.Address.State)

我的帖子操作方法看起来像

public ActionResult Edit(Person person)
{
    var state = person.Address.State;
    return view();
}

但地址是null。

使用像这样的复杂模型的正确方法是什么？

Answer 1

这是解决方案 -

我使用了你的模型 -

public class Person
{
    public int Id { get; set; }
    public string Name { get; set; }
    public virtual Address Address { get; set; }
}

public class Address
{
    public int Id { get; set; }
    public string State { get; set; }
}

然后呈现Edit视图的Controller动作如下 -

    public ActionResult Index()
    {
        Person p = new Person();
        p.Name = "Rami";
        p.Address = new Address();
        p.Address.State = "California";
        return View(p);
    }

编辑视图如下 -

@model MVC.Controllers.Person

@{
    ViewBag.Title = "Index";
}

<h2>Index</h2>

@using (Html.BeginForm("Submit","Person",FormMethod.Post))
{
    @Html.AntiForgeryToken()

    @Html.ValidationSummary(true)
    @Html.HiddenFor(model => model.Id)

    @Html.LabelFor(model => model.Name, new { @class = "control-label col-md-2" })
    @Html.EditorFor(model => model.Name)
    @Html.ValidationMessageFor(model => model.Name)

    @Html.LabelFor(model => model.Address.State, new { @class = "control-label col-md-2" })
    @Html.EditorFor(model => model.Address.State)
    @Html.ValidationMessageFor(model => model.Address.State)

    <input type="submit" value="Save" />
}

最后，当您单击“提交”按钮时，它将点击以下控制器操作 -

    public ActionResult Submit(Person p)
    {
        // Do something with Person p
        return null;
    }

当您设置断点时，您将获得新值，如下所示 -