ASP.NET MVC Model State

Question

ModelState.IsValid is returning false for me in my controller. I know that means one or more model errors were found when model binding. My question is how do I see the errors?

I noticed that my particular ModelState has 6 items in it. If I try to do any of these...

ModelState[0].Errors[0].ToString()
ModelState[0].Errors[0].ErrorMessage
ModelState[0].Value.AttemptedValue

I get this error:

The best overloaded method match for 'System.Web.Mvc.ModelStateDictionary.this[string]' has some invalid arguments

Have you debugged your controller action and actually seen what's inside ModelState? — Robert Koritnik
– Robert Koritnik, Commented Oct 15, 2009 at 13:15

Kieron · Accepted Answer · 2009-10-15 13:16:48Z

3

The indexor into the ModelState is a string (usually the property name of the offending model or name of the html element).

If you check the MSDN docs for the ModelState class, you'll see that it has an Errors collection that will allow you to iterate over the error items (which are ModelError instances) to see what caused them.

answered Oct 15, 2009 at 13:16

Kieron

27.2k16 gold badges81 silver badges124 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Tony Borf · Accepted Answer · 2009-10-15 13:31:37Z

2

in controller;

ModelState.AddModelError("username", "Bad username");

in view;

 <%= Html.ValidationMessage("username") %>

also

<%= Html.ValidationSummary() %>

Html.ValidationSummary() might be what you are looking for.

edited Oct 15, 2009 at 13:31

answered Oct 15, 2009 at 13:21

Tony Borf

4,6709 gold badges46 silver badges52 bronze badges

Collectives™ on Stack Overflow

ASP.NET MVC Model State

2 Answers 2

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related