反射练习-文本编辑扩展插件

      
       Type typeInterface;//定义的接口类型

        private ArrayList plugins = new ArrayList();//存放具体实现类
        int counts = 0;//编号(索引)

        private void Form1_Load(object sender, EventArgs e)
        {
            InterfaceByNote editor;//接口类型
            this.FormBorderStyle = FormBorderStyle.FixedDialog;//固定窗体
      
            //先获取程序集目录路径
            //string path = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), "Addons");
            string path = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), "Addons");
            //string[] interpath = Directory.GetFiles(path, "*.dll");
            string[] interpath = Directory.GetFiles(path, "*.dll");
            for (int i = 0; i < interpath.Length; i++)//循环每个dll文件
            {
                //Assembly asm = Assembly.LoadFile(interpath[i]);
                Assembly asm = Assembly.LoadFile(interpath[i]);//加载每个程序及
                //获取程序集里的所有公共类
                Type[] types = asm.GetExportedTypes();


                typeInterface = typeof(InterfaceByNote);//获取接口的type
                for (int r = 0; r < types.Length; r++)
                {
                    //循环遍历每个类,判断当前类是否实现了接口并且那不是抽象类
                    if (typeInterface.IsAssignableFrom(types[r]) && !types[r].IsAbstract)
                    {
                        editor = (InterfaceByNote)Activator.CreateInstance(types[r]);//创建该实现了接口的类
                        ToolStripItem T = this.编辑EToolStripMenuItem.DropDownItems.Add(editor.Name.ToString());
                        plugins.Add(editor);//添加到实现类的集合中
                        T.Tag = counts;
                        counts++;
                        T.Click += T_Click1;
                    }
                }
            }
        }
        /// <summary>
        /// 扩展插件点击事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void T_Click1(object sender, EventArgs e)
        {
            ToolStripItem s = sender as ToolStripItem;//转换成ToolStripItem -> tag
            InterfaceByNote st = (InterfaceByNote)plugins[Convert.ToInt32(s.Tag)];//根据tag属性 去取 对应实现类
            st.Run(this.textBox1);//执行对应的实现类方法
        }