How to specify a min but no max decimal using the range data annotation attribute?

Question

I would like to specify that a decimal field for a price must be >= 0 but I don\'t really want to impose a max value.

Here\'s what I have so far...I\'m not sure what the

Answer 1

You can use:

[Min(0)]

This will impose a required minimum value of 0 (zero), and no maximum value.

You need DataAnnotationsExtensions to use this.

Answer 2

I would put decimal.MaxValue.ToString() since this is the effective ceiling for the decmial type it is equivalent to not having an upper bound.

Answer 3

It seems there's no choice but to put in the max value manually. I was hoping there was some type of overload where you didn't need to specify one.

[Range(typeof(decimal), "0", "79228162514264337593543950335")]
public decimal Price { get; set; }

Answer 4

How about something like this:

[Range(0.0, Double.MaxValue, ErrorMessage = "The field {0} must be greater than {1}.")]

That should do what you are looking for and you can avoid using strings.

Answer 5

[Range(0.01,100000000,ErrorMessage = "Price must be greter than zero !")]

Answer 6

You can use custom validation:

    [CustomValidation(typeof(ValidationMethods), "ValidateGreaterOrEqualToZero")]
    public int IntValue { get; set; }

    [CustomValidation(typeof(ValidationMethods), "ValidateGreaterOrEqualToZero")]
    public decimal DecValue { get; set; }

Validation methods type:

public class ValidationMethods
{
    public static ValidationResult ValidateGreaterOrEqualToZero(decimal value, ValidationContext context)
    {
        bool isValid = true;

        if (value < decimal.Zero)
        {
            isValid = false;
        }

        if (isValid)
        {
            return ValidationResult.Success;
        }
        else
        {
            return new ValidationResult(
                string.Format("The field {0} must be greater than or equal to 0.", context.MemberName),
                new List<string>() { context.MemberName });
        }
    }
}