c# - Entity Framework 4.1 : Override IEnumerable Validate

Question

    public abstract class Animal , IValidatableObject
    {
        public string Id {get;set;}
        public string Name {get;set;}
        public virtual IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
        {
            if (this.Name == "animal")
            {
                yield return new ValidationResult("Invalid Name From base", new[] { "Name" });
            }
        }
    }




    public class Dog: Animal, IValidatableObject
    {
        public string Owner {get;set;}

  public override IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
    {
        /*
          Here call base validate
         */

        if (this.Name == "dog")
        {
            yield return new ValidationResult("Invalid Name From dog", new[] { "Name" });
        }
    }     

    }

我有一个基类 Animal 实现了 IValidatableObject，现在来自 Dog 子类的 Validate 方法，它还实现了IValidatableObject，我想调用基类的Validate方法。

我试过了(它不调用基类的验证)

base.Validate(validationContext);

Answer 1

在您的代码示例中，您没有从 Animal 派生狗类。只有在迭代时才会调用动物的验证方法通过结果集:

public class Dog : Animal
{
  public override IEnumerable<ValidationResult> Validate(ValidationContext      validationContext)
  {
     foreach(var result in base.Validate(validationContext))
     {
     }

     //dog specific validation follows here...
  }
}

只调用 base.Validate() 而不遍历返回的集合不调用基地的验证方法。希望，这会有所帮助。