反射：私有属性如何提取自定义属性

Question

您好，可以在私有财产中检索自定义属性，

   public class TestAttr
    {
        [SaveInState]
        protected string testPrivate { get { return "test private"; }  }
        [SaveInState]
        public string testPublic { get{ return "test public"; }}

        public IDictionary<string, object> dumpVars()
        {

            IDictionary<string, object> dict = new Dictionary<string, object>();

            Type ownerClassType = this.GetType();


            foreach (var mi in ownerClassType.GetProperties(BindingFlags.NonPublic))
            {

                var varAttrib = Attribute.GetCustomAttribute(mi, typeof(SaveInStateAttribute));
                if (varAttrib != null)
                {
                    dict.Add(mi.Name, mi.GetValue(this, null));
                }
            }

            return dict;

        }
    }

谢谢

Answer 1

是的，这是完全可能的。您拥有的代码（虽然有点毫无意义，因为您在自己的类型中工作，所以不需要反射）非常接近：

var type = this.GetType();
foreach(var prop in 
    type.GetProperties(BindingFlags.Instance | BindingFlags.NonPublic))
{
    var attr = prop.GetCustomAttributes(typeof(SaveInStateAttribute), true);

    if(attr.Length > 0)
    {
        // Add the attributes to your collection
    }
}