This article will show you how to combine type based validation rules with other validations, how to compose them and apply them in different scenarios, adding/removing validations when applied on concrete instances, combining objects of different types and implementing one validation strategy on all.
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel.DataAnnotations;
namespace ComposableServices.ConcreteServices
{
public class InstructionService: ServiceSimple
{
public InstructionService() { }
[Required(AllowEmptyStrings=false,ErrorMessage="Instruction text is mandatory")]
public string Instruction { get; set; }
public bool ManualHandedOut { get; set; }
public new static Func<ServiceBase, bool> checkType()
{
return (x =>
{
if (x is InstructionService) return true;
return false;
});
}
}
}
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