| public GetValue ( ModelInstance root ) : object | ||
| root | ModelInstance | |
| Результат | object | |
protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
ModelInstance instance = ModelInstance.GetModelInstance(validationContext.ObjectInstance);
// Get the member name by looking up using the display name, since the member name is mysteriously null for MVC3 projects
var propertyName = validationContext.MemberName ?? validationContext.ObjectType.GetProperties()
.Where(p => p.GetCustomAttributes(false).OfType<DisplayAttribute>()
.Any(a => a.Name == validationContext.DisplayName)).Select(p => p.Name).FirstOrDefault();
ModelProperty sourceProperty = instance.Type.Properties[propertyName];
if (ComparisonPropertyName == null)
return null;
ModelSource comparePropPath = new ModelSource(instance.Type, ComparisonPropertyName);
object compareValue = comparePropPath.GetValue(instance);
int comparison = ((IComparable)compareValue).CompareTo(value);
switch (Operator)
{
case CompareOperator.Equal: return comparison == 0 ? null : new ValidationResult("Invalid value", new string[] { propertyName });
case CompareOperator.NotEqual: return comparison != 0 ? null : new ValidationResult("Invalid value", new string[] { propertyName });
case CompareOperator.GreaterThan: return comparison < 0 ? null : new ValidationResult("Invalid value", new string[] { propertyName });
case CompareOperator.GreaterThanEqual: return comparison <= 0 ? null : new ValidationResult("Invalid value", new string[] { propertyName });
case CompareOperator.LessThan: return comparison > 0 ? null : new ValidationResult("Invalid value", new string[] { propertyName });
case CompareOperator.LessThanEqual: return comparison >= 0 ? null : new ValidationResult("Invalid value", new string[] { propertyName });
}
return null;
}