How to figure out which key of ModelState has error

by

You can check the ViewData.ModelState.Values collection and see what are the Errors. 

[Httpost]
public ActionResult Create(User model)
{
   if(ModelState.IsValid)
   {
     //Save and redirect
   }
   else
   {
     foreach (var modelStateVal in ViewData.ModelState.Values)
     {
       foreach (var error in modelStateVal.Errors)
       {               
          var errorMessage = error.ErrorMessage;
          var exception = error.Exception;
          // You may log the errors if you want
       }
     }
   }         
   return View(model);
 }
}

If you really want the Keys(the property name), You can iterate through the ModelState.Keys 

foreach (var modelStateKey in ViewData.ModelState.Keys)
{
    var modelStateVal = ViewData.ModelState[modelStateKey];
    foreach (var error in modelStateVal.Errors)
    {
        var key = modelStateKey; 
        var errorMessage = error.ErrorMessage;
        var exception = error.Exception;
        // You may log the errors if you want
    }
}

More Related Contents:

  1. ModelState.IsValid == false, why?
  2. What does ModelState.IsValid do?
  3. The model item passed into the dictionary is of type .. but this dictionary requires a model item of type
  4. Prevent Caching in ASP.NET MVC for specific actions using an attribute
  5. ASP.NET MVC: No parameterless constructor defined for this object
  6. How can I get this ASP.NET MVC SelectList to work?
  7. How to get current user, and how to use User class in MVC5?
  8. Custom validation attribute that compares the value of my property with another property’s value in my model class
  9. asp.net MVC 4 multiple post via different forms
  10. Razor: Declarative HTML helpers
  11. MVC web api: No ‘Access-Control-Allow-Origin’ header is present on the requested resource
  12. Visual Studio 2015 Broken Razor Intellisense
  13. When should I create a new DbContext()
  14. JsonValueProviderFactory throws “request too large”
  15. Determine Client’s Computer Name
  16. C# Entity-Framework: How can I combine a .Find and .Include on a Model Object?
  17. Put content in HttpResponseMessage object?
  18. how to add querystring values with RedirectToAction method?
  19. MEF with MVC 4 or 5 – Pluggable Architecture (2014)
  20. Need an ASP.NET MVC long running process with user feedback
  21. Redirect to another page when user is not authorized in asp.net mvc3
  22. FileResult with MemoryStream gives empty result .. what’s the problem?
  23. How do you post a JSON file to an ASP.NET MVC Action?
  24. log4net with DI Simple Injector
  25. Where can I find the System.Linq.Dynamic dll?
  26. How to create Select List for Country and States/province in MVC
  27. Repository Pattern, POCO, and Business Entities
  28. .NET Managing Layers Relationships
  29. How to know if an HTTP request header value exists
  30. There is no ViewData item of type ‘IEnumerable’ that has the key country

Leave a Comment