Model string property null on submit in MVC 3

Question

My model looks like:

public class MyViewModel
    {
        public MyViewModel()
        {
            MyClasses = new List<MyClass>();
        }

        public List<MyClass> MyClasses{ get; set; }

        [Required(ErrorMessage = "is required.")]
        public string Prop1{ get; set; }

        [Required(ErrorMessage = "is required.")]
        public int Prop2{ get; set; }
    }

My controller on post:

[HttpPost]
public ActionResult MyActionOnPost(MyViewModel model)
{
//save to DB
//Prop2 is not null but Prop1 is nulll. why??
}

View code:

@Html.TextBoxFor(m => m.Prop2) @Html.ValidationMessageFor(m => m.Prop2)

@Html.TextBoxFor(m => m.Prop1) @Html.ValidationMessageFor(m => m.Prop1)

I can see Prop2 value on submit but Prop1 is null. Any idea?

I could see both the values on submit. I've tried with your viewmodel and textboxes as well — Karthik Chintala
– Karthik Chintala, Commented Feb 22, 2013 at 8:53
It is simple though don't see value. ModelState.IsValid is false. It says Prop1 is empty. — user1480864
– user1480864, Commented Feb 25, 2013 at 8:38

Lakshay Dulani · Accepted Answer · 2013-02-22 06:40:40Z

1

[DisplayFormat(ConvertEmptyStringToNull = false)]

This is your answer. Add this to every string in your code, and it will work perfectly!

answered Feb 22, 2013 at 6:40

Lakshay Dulani

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3 Comments

Lakshay Dulani Over a year ago

Add this just like you have added the Required tag. After adding it, you will get an empty string instead of null.

user1480864 Over a year ago

Sorry, why should I see empty or null when am typing in something?

Lakshay Dulani Over a year ago

Dear I guess you must have got null only when you posted empty Prop1 textbox. If you fill the textbox with some value and then post it, I am sure you will get it on the server-side. I am not sure about your problem, are you getting null even if you fill some value in textbox?

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