CODEWITHSUNDEEP
c#asp.net-mvc-3validation
Diver Dan
Diver Dan

Reputation: 9963

Validating a MVC3 viewmodel object based on a selected condition

I want to do some conditional validation for a view model I have created.

public class MyViewModel
{
    public int SelectedItem { get; set; }

    public Item Item1 { get; set; }
    public DetailedItem Item2 { get; set; }

}

public class Item
{
    [Required]
    public int Id { get; set; }

    [Required]
    public string Name { get; set; }
}

public class DetailedItem
{
    [Required]
    public int Id { get; set; }

    [Required]
    public string Name { get; set; }

    [Required]
    public string Description { get; set; }
}

I have a radiobutton bound to SelectedItem that via clientside shows or hides a partial view bound to Item & DetailedItem.

On form post I want to validate the selected model but how. If I were to use the above code and do a 

ModelState.IsValid

With only one of the partial views fully completed I would get a IsValid=false due to the other modal not containing the required fields.

Is there a way to only validate only the selected model?

Any help would be awesome!

Upvotes: 1

Views: 150

Answers (1)

Dan Teesdale
Dan Teesdale

Reputation: 1863

Yes, the ModelState is a Dictionary class and you can remove an item from it using a Key.

For example,

ModelState.Remove("Item1");

Then a call to

ModelState.IsValid

will ignore requirements of that entry.

Here is a link to the documentation, and there is also some discussion about whether this should ever occur in your ViewModels or not.

Upvotes: 2

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