CustomValidation string length either 6 or 13

Question

User-1952516322 posted

Hello,

I want to know how to build a class example (CustomStringLength) to validate a string if the length is 6 or 13.

Note: I don't want a value between or not range validation ,, just the correct value if the length is 6 or 13.

Answer 1

User-474980206 posted

simple regex validator:  

   ^.{6}$|.{13}$

Answer 2

User1520731567 posted

Hi Khalid Salameh,

As @bruce said,you could use regex to achieve your need simply.

Khalid Salameh

I want to know how to build a class example (CustomStringLength) to validate a string if the length is 6 or 13.

And you could also use custom validate,for example:

Model:

    [CustomStringLength(ErrorMessage = "The field length only should be 6 or 13")]
    public string Name { get; set; }

CustomStringLength class:

 public class CustomStringLengthAttribute : ValidationAttribute
    {
        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
        {
            if (value.ToString().Length!=6 && value.ToString().Length!=13)
            {
                return new ValidationResult(this.FormatErrorMessage(validationContext.DisplayName));
            }
            return null;
        }
    }

Best Regards.

Yuki Tao

Answer 3

User-1952516322 posted

Hello Yuki, bruce

Thanks for your reply, but I want to know if there is a class like an example >> public class CustomLength: StringLengthAttribute,IClientValidatable

I want to do like this

[CustomLength(6,13)]
public string Name

Is there a class I can build constructor got two value,     the (StringLengthAttribute) take just minimum value, but I don't want minimum or max because it's not range, I want like the code above, please if someone know help me.