1

我需要能够用自定义属性装饰一个 DLL，然后在运行时从另一个应用程序中读取它们。

我有一个名为“QueryDLL”的“主”应用程序。它通过以下代码查询 dll：

String assemblyName;
        assemblyName = @"..\GenericControl.Dll";
        Assembly a = Assembly.LoadFrom(assemblyName);
        Type type = a.GetType("GenericControl.UserControl1", true);
        System.Reflection.MemberInfo info = type;
        var attributes = info.GetCustomAttributes(false);

        foreach (Attribute attr in attributes)
        {
          string value = attr.Name;  <----- This of course fails as attr is not of type "GenericControl.UserControl1" - How do I get access "name" field here...
        }

我对如何从 dll 中的属性装饰中获取各个字段（例如名称字段）感到困惑。（我检查了其他示例，但不知所措……我怀疑我遗漏了一些简单的东西？）

在上面的 foreach 循环中，如果我打开调试器并检查“属性”集合，它正确包含 dll 中包含的 4 个属性装饰，但我无法提取各个字段（名称、级别、已审核） .

我的 DLL 包含一个定义属性的类：

  [AttributeUsage(AttributeTargets.All, AllowMultiple = true)]
    public class DeveloperAttribute : Attribute
    {
        // Private fields. 
        private string name;
        private string level;
        private bool reviewed;

        // This constructor defines two required parameters: name and level. 

        public DeveloperAttribute(string name, string level)
        {
            this.name = name;
            this.level = level;
            this.reviewed = false;
        }

        // Define Name property. 
        // This is a read-only attribute. 

        public virtual string Name
        {
            get { return name; }
        }

        // Define Level property. 
        // This is a read-only attribute. 

        public virtual string Level
        {
            get { return level; }
        }

        // Define Reviewed property. 
        // This is a read/write attribute. 

        public virtual bool Reviewed
        {
            get { return reviewed; }
            set { reviewed = value; }
        }
    }

这个 DLL 也用这个属性修饰：

 namespace GenericControl
    {

        [DeveloperAttribute("Joan Smith", "42", Reviewed = true)]
        [DeveloperAttribute("Bob Smith", "18", Reviewed = false)]
        [DeveloperAttribute("Andy White", "27", Reviewed = true)]
        [DeveloperAttribute("Mary Kline", "23", Reviewed = false)]


        public partial class UserControl1: UserControl
        {
          public UserControl1()
           {
             InitializeComponent();
            }
          ...

感谢您提供的任何见解...

4

1 回答 1

1 
foreach (Attribute attr in attributes)
{
   var devAttr = attr as DeveloperAttribute;
   if (devAttr != null)
   {
      string value = devAttr.Name;
   }
}
于 2012-12-23T23:14:13.970 回答