Range validation - make exceptions to the rule

Question

I have a class with a property which has a range attribution on it.

        [Required]
        [Range(5, 9999)]
        public double Price { get; set; }

Which is respected at all times and on any user input.

But on one specific code path, where i am automating some entries, i want to be able to set the Price to 0. So i want to programmatically tell this model class to ignore this requirement.

Is it possible? If so how?

Are you supposed to be using double for what appears to be a monetary value? — Lloyd, Jan 02 '12 at 05:49
Good question ... what do you usually use? in sql server and .net? — MoXplod, Jan 03 '12 at 08:25
Decimal http://msdn.microsoft.com/en-us/library/ms187746.aspx — Lloyd, Jan 03 '12 at 08:30

score 0 · Accepted Answer · edited May 23 '17 at 12:27

0

This seems like a duplicate of this question, but maybe I'm not completely understanding your requirements.

For your scenario I might try implementing the IValidatableObject interface so that way you can control the validation logic rather than using a declarative validation pattern.

edited May 23 '17 at 12:27

Community

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answered Jan 02 '12 at 05:40

Sneal

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i am not using views in many cases. Some times these models are called using API's or windows services etc. – MoXplod Jan 02 '12 at 05:50

score 0 · Answer 2 · answered Jan 02 '12 at 05:48

I would suggest you to create a derived type of System.ComponentModel.DataAnnotations.ValidationAttribute. The implementation can be similar to RangeAttribute class with additional parameter of exceptional values.

Have a look at this MSDN article for details on how to do this.

Range validation - make exceptions to the rule

2 Answers2