validation

Question

This is my code in mvc

public class UserViewModel

{

[Key]

public int UserId { get; set; }

[Display(Name="Family Name")]

[Required]

public string FamilyName { get; set; }

[Required]

[Display(Name="Father Name")]

public string FatherName { get; set; }

[Required]

public string Name { get; set; }

[Display(Name="Family Unit Name")]

[Required]

public int FamilyUnitId { get; set; }

public virtual FamilyUnit FamilyUnit { get; set; }

[Required]

public string Username { get; set; }

[DataType(DataType.Password)]

[Required]

public string Password { get; set; }

[DataType(DataType.Password)]

[Display(Name="Confirm Password")]

[System.ComponentModel.DataAnnotations.Compare("Password", ErrorMessage = "Password doesnot match.")]

[Required]

public string ConfirmPassword { get; set; }

}

}

 

 

I have applied all the code of confirm password validation and when username exits it will show error

 

How to fix this error?Can anyone help me please