Custom Validation in mvc3

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Hello,
I am not using AccountController or membership for creating users and role in my MVC Application.
I have my database that maintains all this.
I want to apply data validation for one of the field "EmpNo"- to check already exists.
my question is, can I use remote validator provided by MVC under class System.Web.Mvc if not how can I apply Custom validation to achieve this.

Thanks

Posted 5-Sep-13 21:19pm

saurabh kumar mahto

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Jameel VM 6-Sep-13 4:51am

can u post the code what you have tried?

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saurabh kumar mahto · Answer 1 · 2013-09-06T03:04:00

My purpose is solved
I did as below,
Validation is working fine with the create view but its also working for the same field in Edit view,where I dont want this validation to apply.
How to solve this ?

C#

public class EmployeeViewModel
{

    [CustomValidation(typeof(EmployeeViewModel), "ValidateDuplicate")]
    [Required]
    [DisplayName("Employee Number")]
    public string EmpNo{ get; set; }

    public static ValidationResult ValidateDuplicate(string empno)
    {
      bool isValid;

      using(var db = new YourContextName) {
        if(db.EmployeeViewModel.Where(e => e.Username.Equals(empno)).Count() > 0)
       {
          isValid = false;
       } else {
          isValid = true;
       }
      }

      if (isValid)
      {
        return ValidationResult.Success;
      }
      else
      {
        return new ValidationResult("empno already exists");
      }

    }
}