ASP.NET MVC 5.0 Complex Model binding

Question

I have a view with the name "Create". This view gets the "SchoolViewModel" which contains two classes:

public class SchoolViewModel
{
    public List<Teacher> ListTeacher { get; set; }
    public List<SchoolClass> ListSchoolClass { get; set; }
    public ClassComplete ClassComplete { get; set; }
}

Each list in "SchoolViewModel" provides data from a database.

At the "Create" page you should be able now to select a teacher and class (DropDownList). The "ClassComplete" object contains the two classes (Teacher and SchoolClass) and the roomname

public class ClassComplete
{
    public string RoomName { get; set; }
    public SchoolClass SchoolClass { get; set; }
    public Teacher Teacher { get; set; }
}

I want only to post the "ClassComplete" object.

My ActionResult

[HttpPost]
public ActionResult Create(ClassComplete cp)
{
        // Do something
        return View();
}

Edit: Razor View

 @using (Html.BeginForm())
    {
        @Html.EditorFor(m => m.ListTeacher[0].TeacherName)
        @Html.EditorFor(m => m.ListSchoolClass[0].ClassName)

        @Html.TextBoxFor(m => m.cl.RoomName)<br />

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

Is this the right way ?

best regards

Can you show me what your @model directive looks like? I don't see cl anywhere — beautifulcoder
– beautifulcoder, Commented Jan 25, 2015 at 14:14

Darin Dimitrov · Accepted Answer · 2015-01-26 07:27:23Z

If you want to POST only ClassComplete model you will need to indicate the binding prefix:

[HttpPost]
public ActionResult Create([Bind(Prefix="ClassComplete")] ClassComplete cp)
{
    // Do something
    return View();
}

and in your view:

@using (Html.BeginForm())
{
    @Html.TextBoxFor(m => m.ClassComplete.RoomName)
    <br />
    <input type="submit" value="Click" />
}

The TextBoxFor will generate the following input field in the resulting markup:

<input type="text" name="ClassComplete.RoomName" />

Notice the name of the input field. That's the reason why you need to indicate this prefix in your controller action.

This will also work for the other properties if you want to send them you just need to include the corresponding input fields:

@Html.TextBoxFor(m => m.ClassComplete.SchoolClass.SomeProperty)
@Html.TextBoxFor(m => m.ClassComplete.Teacher.SomeOtherProperty)
...

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