I have an MVC4 web app.
My model contains a Dictionary whose values are an array of one of my own classes.
Given the view below, I'm expecting the default model binder to be able to reconstruct the model/dictionary when I submit to the Post action, however this is not the case.
I do get a MyModel instance and ModelState.IsValid == true, however the dictionary has no key/value pairs in it.
Am I missing something (not adhering to the prescribed convention?) or is this a scenario that requires a custom model binder/digging into the Request.Form collection?
Sample code to reproduce this behaviour:
Model:
public class MyClass
{
public int MyInt { get; set; }
public string MyString { get; set; }
}
public class MyModel
{
public Dictionary<int, MyClass[]> MyDictionary { get; set; }
}
View:
@using (Html.BeginForm("MyAction", "Home", FormMethod.Post))
{
foreach (var key in Model.MyDictionary.Keys)
{
<hr />@key<br />
for (int i = 0; i < Model.MyDictionary[key].Length; i++)
{
@Html.HiddenFor(m => m.MyDictionary[key][i].MyInt);
@Model.MyDictionary[key][i].MyInt
@Html.TextBoxFor(m => m.MyDictionary[key][i].MyString);<br/>
}
}
<hr />
<button type="submit">Post</button>
}
Controller:
[HttpGet]
public ActionResult MyAction()
{
var model = new MyModel()
{
MyDictionary = new Dictionary<int, MyClass[]> {
{10, new MyClass[] { new MyClass { MyInt = 1, MyString = "Foo" }, new MyClass { MyInt = 2, MyString = "Bar"}}},
{20, new MyClass[] { new MyClass { MyInt = 3, MyString = "Fubar" }}}
}
};
return View(model);
}
[HttpPost]
public ActionResult MyAction(MyModel model)
{
return View(model);
}
