设置自定义属性的属性 [英] Set property of a custom attribute

问题描述

我需要在运行时更改属性的属性.

示例:

I need to change the property of an attribute at run time.

Example:

public partial class Class1
{
  [Attr1("")]
  public string ID { get; set; }
}

public class Attr1: Attribute
{
   public string Type { get; set;}

   public Attr1() { }

   public Attr1(string type)
   {
     Type = type
   }
}

测试时:

When testing:

Class1 c = new Class1();
c.ID = "ID1";
PropertyInfo propPK = c.GetType().GetProperty("ID");
object[] attrs = propPK.GetCustomAttributes(typeof(Attr1), false);
if (attrs.Length > 0)
{
  object attr = attrs.First();
  attr.GetType().GetProperty("Type").SetValue(attr, "Type1" , null);
}

因此，当我按顺序检查[C]对象以检查是否设置了属性的属性时，我看到它为空白...

So when I check the [C] object in order the check if the property of the attribute is set, I see it blank...

推荐答案

对不起，您不能去做.自定义属性是只读的，仅在编译时设置.您最好走另一条路.

Sorry, you cannot do that. Custom attributes are readonly and set only at compile time. You''d be better off going another route.

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