Question

I have an object which has properties decorated with Validation attributes. My validation is working correctly, however I need an additional method which performs string manipulation based on those attributes.

Consider the following object:

public class Pupil
{
    /// <summary>
    /// 
    /// </summary>
    public Pupil()
    {

    }

    [NotNullValidator]
    [StringLengthValidator(0, 54, MessageTemplate = "Invalid value '{0}' for {1}, Max length: {5}")]
    public string Name{ get; set; }

    [NotNullValidator]
    [StringLengthValidator(0, 2, MessageTemplate = "Invalid value '{0}' for {1}, Max length: {5}")]
    public string Gender{ get; set; }
}

I want to be able to manipulate the “Name” based on the StringLengthValidator attribute and its arguments. For example:

///Takes a Pupil object in
public static void DoManipulation(object value)
    {
        foreach(var property in value.GetType().GetProperties())
        {
            if(property.Name == "Name")
            {
                var att = property.GetCustomAttributes(typeof(StringLengthValidator), false);
                var length = ((StringLengthValidator)att[0]).UpperBound;

            }               
        }
    }

The value of “length” is coming up as null, rather than 54. How do I get the value out?
Hopefully this makes sense, thanks.

A

Answer 1

This works for me, are you getting the same StringLengthValidator attribute that you think you are? (is this your custom class or the one from Enterprise Lib?

In my case, I created a custom class StringLengthValidator