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

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What is range attribute?

The range attribute allows a numeric range to be specified for a slot when a numeric value is used in that slot. If a numeric value is not used in that slot, then no checking is performed.

What is System ComponentModel DataAnnotations?

Data annotations (available as part of the System. ComponentModel. DataAnnotations namespace) are attributes that can be applied to classes or class members to specify the relationship between classes, describe how the data is to be displayed in the UI, and specify validation rules.

What is data annotation validator attributes in MVC?

Data annotation attributes are attached to the properties of the model class and enforce some validation criteria. They are capable of performing validation on the server side as well as on the client side. This article discusses the basics of using these attributes in an ASP.NET MVC application.


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.


If you are concerned about the string looking nice you could do this:

    [Range(0, Double.PositiveInfinity)]

This will have a default error message of:

The field SuchAndSuch must be between 0 and Infinity.


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; }

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.


If you're working with prices, I'm sure you can safely assume nothing will cost more than 1 trillion dollars.

I'd use:

[Range(0.0, 1000000000000)]

Or if you really need it, just paste in the value of Decimal.MaxValue (without the commas): 79,228,162,514,264,337,593,543,950,335

Either one of these will work well if you're not from Zimbabwe.


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 });
        }
    }
}