C# custom validation ValidationAttribute

Using the ValidationAttribute we can handle custom validation. It is available in namespace: System.ComponentModel.DataAnnotations Below is snippet for the same here age is being evaluated.

public class AgeValidator : ValidationAttribute
  public int Age { get; set; }

  public override bool IsValid(object value)
    DateTime dob;
    if (value != null
       && DateTime.TryParse(value.ToString(), out dob))
      if (dob.AddYears(Age) <= DateTime.Now)
        return true;
    return false;

12 thoughts on “C# custom validation ValidationAttribute”

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