C# 按属性值获取属性名

您好，如果我有该属性的自定义属性值，如何获取该类的属性名？当然还有自定义属性名。

通过自定义属性获取属性名：

    public static string[] GetPropertyNameByCustomAttribute
      <ClassToAnalyse, AttributeTypeToFind>
      (
       Func<AttributeTypeToFind, bool> attributePredicate
      )
      where AttributeTypeToFind : Attribute
    {  
      if (attributePredicate == null)
      {
        throw new ArgumentNullException("attributePredicate");
      }
      else
      {
        List<string> propertyNames = new List<string>();

        foreach 
        (
          PropertyInfo propertyInfo in typeof(ClassToAnalyse).GetProperties()
        )
        {
          if
          (
            propertyInfo.GetCustomAttributes
            (
              typeof(AttributeTypeToFind), true
            ).Any
            (
              currentAttribute =>                  
              attributePredicate((AttributeTypeToFind)currentAttribute)
            )
          )
          {
            propertyNames.Add(propertyInfo.Name);
          }
        }  

        return propertyNames.ToArray();
      }
    }

public class FooAttribute : Attribute
{
  public String Description { get; set; }
}

class FooClass
{
  private int fooProperty = 42;

  [Foo(Description="Foo attribute description")]
  public int FooProperty
  {
    get
    {
      return this.fooProperty;
    }
  }

}

// It will return "FooProperty"
GetPropertyNameByCustomAttribute<FooClass, FooAttribute>
( 
  attribute => attribute.Description == "Foo attribute description"
);


// It will return an empty array
GetPropertyNameByCustomAttribute<FooClass, FooAttribute>
( 
  attribute => attribute.Description == "Bar attribute description"
);   

测试用例：

    public static string[] GetPropertyNameByCustomAttribute
      <ClassToAnalyse, AttributeTypeToFind>
      (
       Func<AttributeTypeToFind, bool> attributePredicate
      )
      where AttributeTypeToFind : Attribute
    {  
      if (attributePredicate == null)
      {
        throw new ArgumentNullException("attributePredicate");
      }
      else
      {
        List<string> propertyNames = new List<string>();

        foreach 
        (
          PropertyInfo propertyInfo in typeof(ClassToAnalyse).GetProperties()
        )
        {
          if
          (
            propertyInfo.GetCustomAttributes
            (
              typeof(AttributeTypeToFind), true
            ).Any
            (
              currentAttribute =>                  
              attributePredicate((AttributeTypeToFind)currentAttribute)
            )
          )
          {
            propertyNames.Add(propertyInfo.Name);
          }
        }  

        return propertyNames.ToArray();
      }
    }

public class FooAttribute : Attribute
{
  public String Description { get; set; }
}

class FooClass
{
  private int fooProperty = 42;

  [Foo(Description="Foo attribute description")]
  public int FooProperty
  {
    get
    {
      return this.fooProperty;
    }
  }

}

// It will return "FooProperty"
GetPropertyNameByCustomAttribute<FooClass, FooAttribute>
( 
  attribute => attribute.Description == "Foo attribute description"
);


// It will return an empty array
GetPropertyNameByCustomAttribute<FooClass, FooAttribute>
( 
  attribute => attribute.Description == "Bar attribute description"
);   

//它将返回“FooProperty”
GetPropertyNameByCustomAttribute
( 
属性=>attribute.Description==“Foo属性描述”
);
//它将返回一个空数组
GetPropertyNameByCustomAttribute
( 
属性=>attribute.Description==“条形图属性描述”
);   

通过自定义属性获取属性名：

    public static string[] GetPropertyNameByCustomAttribute
      <ClassToAnalyse, AttributeTypeToFind>
      (
       Func<AttributeTypeToFind, bool> attributePredicate
      )
      where AttributeTypeToFind : Attribute
    {  
      if (attributePredicate == null)
      {
        throw new ArgumentNullException("attributePredicate");
      }
      else
      {
        List<string> propertyNames = new List<string>();

        foreach 
        (
          PropertyInfo propertyInfo in typeof(ClassToAnalyse).GetProperties()
        )
        {
          if
          (
            propertyInfo.GetCustomAttributes
            (
              typeof(AttributeTypeToFind), true
            ).Any
            (
              currentAttribute =>                  
              attributePredicate((AttributeTypeToFind)currentAttribute)
            )
          )
          {
            propertyNames.Add(propertyInfo.Name);
          }
        }  

        return propertyNames.ToArray();
      }
    }

public class FooAttribute : Attribute
{
  public String Description { get; set; }
}

class FooClass
{
  private int fooProperty = 42;

  [Foo(Description="Foo attribute description")]
  public int FooProperty
  {
    get
    {
      return this.fooProperty;
    }
  }

}

// It will return "FooProperty"
GetPropertyNameByCustomAttribute<FooClass, FooAttribute>
( 
  attribute => attribute.Description == "Foo attribute description"
);


// It will return an empty array
GetPropertyNameByCustomAttribute<FooClass, FooAttribute>
( 
  attribute => attribute.Description == "Bar attribute description"
);   

测试用例：

    public static string[] GetPropertyNameByCustomAttribute
      <ClassToAnalyse, AttributeTypeToFind>
      (
       Func<AttributeTypeToFind, bool> attributePredicate
      )
      where AttributeTypeToFind : Attribute
    {  
      if (attributePredicate == null)
      {
        throw new ArgumentNullException("attributePredicate");
      }
      else
      {
        List<string> propertyNames = new List<string>();

        foreach 
        (
          PropertyInfo propertyInfo in typeof(ClassToAnalyse).GetProperties()
        )
        {
          if
          (
            propertyInfo.GetCustomAttributes
            (
              typeof(AttributeTypeToFind), true
            ).Any
            (
              currentAttribute =>                  
              attributePredicate((AttributeTypeToFind)currentAttribute)
            )
          )
          {
            propertyNames.Add(propertyInfo.Name);
          }
        }  

        return propertyNames.ToArray();
      }
    }

public class FooAttribute : Attribute
{
  public String Description { get; set; }
}

class FooClass
{
  private int fooProperty = 42;

  [Foo(Description="Foo attribute description")]
  public int FooProperty
  {
    get
    {
      return this.fooProperty;
    }
  }

}

// It will return "FooProperty"
GetPropertyNameByCustomAttribute<FooClass, FooAttribute>
( 
  attribute => attribute.Description == "Foo attribute description"
);


// It will return an empty array
GetPropertyNameByCustomAttribute<FooClass, FooAttribute>
( 
  attribute => attribute.Description == "Bar attribute description"
);   

//它将返回“FooProperty”
GetPropertyNameByCustomAttribute
( 
属性=>attribute.Description==“Foo属性描述”
);
//它将返回一个空数组
GetPropertyNameByCustomAttribute
( 
属性=>attribute.Description==“条形图属性描述”
);   

请解释更多，您的问题不是很清楚，可能会结束。请解释更多，您的问题不是很清楚，可能会结束。这与属性有什么关系？诚然，这个问题并不清楚，但答案中甚至没有“属性”这个词。不知道为什么会被否决。我对这个问题的看法是OP询问如何检索给定对象的可调用属性列表。考虑到问题中缺乏信息，这个答案似乎是正确的。很明显，我知道他想知道如何使用反射API，因为我听到了关于反射API的其他相关问题，我知道对于不知道这个API的人，很难解释他的意图。你应该得到属性的属性：propertyInfo.attributes，这将有助于回答这个问题。或者对于自定义属性：这与属性有什么关系？诚然，这个问题并不清楚，但答案中甚至没有“属性”这个词。不知道为什么会被否决。我对这个问题的看法是OP询问如何检索给定对象的可调用属性列表。考虑到问题中缺乏信息，这个答案似乎是正确的。很明显，我知道他想知道如何使用反射API，因为我听到了关于反射API的其他相关问题，我知道对于不知道这个API的人，很难解释他的意图。你应该得到属性的属性：propertyInfo.attributes，这将有助于回答这个问题。或对于自定义属性：