实体框架4.1：覆盖IEnumerable< ValidationResult>验证 [英] Entity Framework 4.1: Override IEnumerable<ValidationResult> Validate

问题描述

公共抽象类Animal，IValidatableObject
{
public string Id {get; set;}
public string Name {get; set;}
public virtual IEnumerable< ValidationResult>验证（ValidationContext validationContext）
{
if（this.Name ==animal）
{
yield返回新的ValidationResult（Invalid Name from base，new [] { 名称 }）;
}
}
}




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

public override IEnumerable< ValidationResult>验证（ValidationContext validationContext）
{
/ *
这里调用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 IValidatableObject ，现在从 Dog 子类的验证方法也实现 IValidatableObject ，我想调用基类的 Validate 方法。

我尝试了（它不会调用基类验证）

  base.Validate（validationContext）; 
  

解决方案

在你的代码示例中，你没有得到你的狗类从动物。
只有通过结果集迭代
，才会调用动物的验证方法：

  public class Dog：Animal 
 {
 public override IEnumerable< ValidationResult>验证（ValidationContext validationContext）
 {
 foreach（var result in base.Validate（validationContext））
 {
} 
 
 //狗具体验证如下这里... 
} 
} 
  

只调用base.Validate（）没有迭代返回的集合将
不调用基础的验证方法。
希望，这有帮助。

    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" });
        }
    }     

    }

I have a base class Animal which implements IValidatableObject, now from Dog sub-class's Validate method which also implements IValidatableObject, I want to call base class's Validate method.

I tried doing (it doesn't call base class's validate)

base.Validate(validationContext);

解决方案

In your code sample you did not derive your dog class from Animal. The animal's validation method will only be called if you iterate through the result set:

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

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

Only calling base.Validate() without iterating through the returned collection will not call the base's validation method. Hope, this helps.

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