public void ValidateEmptyOptional()
{
var validationAttr = new InnerAttribute(typeof(RegularExpressionAttribute), @"^\d{11}$");
var optional = new Maybe <string>();
Assert.IsTrue(validationAttr.IsValid(optional));
}
public void ValidateNonEmptyOptional()
{
var validationAttr = new InnerAttribute(typeof(RegularExpressionAttribute), @"\d{11}$");
var optionalOk = new Maybe <string>("13901234567");
var optionalBad = new Maybe <string>("12345");
Assert.IsTrue(validationAttr.IsValid(optionalOk));
Assert.IsFalse(validationAttr.IsValid(optionalBad));
}
protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
// get a reference to the property this validation depends upon
var containerType = validationContext.ObjectInstance.GetType();
var field = containerType.GetProperty(this.DependentProperty);
if (field != null)
{
// get the value of the dependent property
var dependentvalue = field.GetValue(validationContext.ObjectInstance, null);
// compare the value against the target value
if ((dependentvalue == null && this.TargetValue == null) || (dependentvalue != null && dependentvalue.Equals(this.TargetValue)))
{
// match => means we should try validating this field
if (!InnerAttribute.IsValid(value))
{
// validation failed - return an error
return(new ValidationResult(this.ErrorMessage, new[] { validationContext.MemberName }));
}
}
}
return(ValidationResult.Success);
}
