[jbeckton]

I am trying to create some custom model validation by using Data Annotations in an MVC application.

The problem is I have instances where one property is required but only based on the value of another property. I figured that I would need to write a custom attribute class for this but I cannot find any examples other the most basic that do not address my situation.


for example...

[Required]
public bool FeeAgree
		{
		get
		{
			return _feeAgree;
		}
		set
		{
			_feeAgree = value;
		}
		}

public decimal Fee
		{
		get
		{
			return _fee;
		}
		set
		{
			_fee = value;
		}
	}

in the above snippet, the FeeAgree property is only required if the Fee property value is > 0

[Curtis Rutland]

Moved to the ASP.NET MVC forum.

[Wimpy]

You can always inherit the ValidationAttribute and override the IsValid-method.

Example:

public class MyIsNotNullValidationAttribute : ValidationAttribute
{
    public override bool IsValid(object value)
    {
        return value != null;
    }
}

Hope it helps!