I'm trying to implement localization in a custom validation attribute in asp.net core 1.0. This is my simplified viewmodel:
public class EditPasswordViewModel
{
[Required(ErrorMessage = "OldPasswordRequired")]
[DataType(DataType.Password)]
[CheckOldPassword(ErrorMessage = "OldPasswordWrong")]
public string OldPassword { get; set; }
}
The localization of "OldPasswordRequired" is working fine. However the localization of my custom attribute is not working and returns always "OldPasswordWrong" message. This is the code:
public class CheckOldPasswordAttribute : ValidationAttribute
{
protected override ValidationResult IsValid(object classInstance, ValidationContext validationContext)
{
if (oldPasswordSaved == oldPasswordTyped) //simplified
{
return ValidationResult.Success;
}
else
{
string errorMessage = FormatErrorMessage(ErrorMessageString);
return new ValidationResult(errorMessage);
}
}
}
ErrorMessageString is always "OldPasswordWrong" and FormatErrorMessage returns always "OldPasswordWrong". What am I doing wrong?
I'm using the new asp.net core data annotations localizations, so I'm not using ErrorMessageResourceName and ErrorMessageResourceType attributes (I don't have any ViewModel.Designer.cs).
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