You can't pass variable values (values that are not evaluated at compile-time) into attributes. They have to be literal values or constant values.
What you can pass into attributes, though, are the names of the properties of your model that you want to evaluate at run-time, and then have your IsValid
method evaluate these values at run-time by accessing the ValidationContext
in the override that returns a ValidationResult
of ValidationAttribute
.
Or, if you are always evaluating these same properties, then you can just grab the reference to your model, and use that directly:
protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
LoginModel loginModel = (LoginModel)validationContext.ObjectInstance;
string strValue = value.ToString();
if (strValue.Contains(loginModel.Voornaam.ToLower()) ||
strValue.Contains(loginModel.Achternaam.ToLower()) ||
strValue.Contains(loginModel.Gebruikersnaam.ToLower()))
{
ErrorMessage = "Uw wachtwoord mag niet uw voornaam, achternaam of gebruikersnaam bevatten.";
return false;
}
else
{
return true;
}
}