.NET 基础知识

“生成此程序的程序集比加载的运行时新”，因为用Vs2008开发的主程序，但插件用的是Vs2010开发的。新建的时候选择.net3.5Framework就可以了。

 public void ShutDown(string second)
        {
            Process process = new Process();
            process.StartInfo.FileName = "cmd.exe";
            process.StartInfo.UseShellExecute = false;
            process.StartInfo.RedirectStandardInput = true;
            process.StartInfo.RedirectStandardOutput = true;
            process.StartInfo.RedirectStandardError = true;
            process.StartInfo.CreateNoWindow = true;
            process.Start();
            process.StandardInput.WriteLine("shutdown -s -f -t " + second);
            //process.StandardInput.WriteLine("dir c:");
            process.StandardInput.WriteLine("exit");


            process.Close();
        }

//通过接口定义 插件怎么去实现 
public interface IPlugin
    {
        string PluginName
        {
            get;
        }
        string Execute(string param);
    }
//窗体加载
void LoadMenu() {
            string path = AppDomain.CurrentDomain.BaseDirectory;
            path = Path.Combine(path, "Plugin");
            string[] plugins = Directory.GetFiles(path,"*.dll");
            foreach (string plugin in plugins)
            {
                Assembly ass = Assembly.LoadFile(plugin);
                foreach (Type t in ass.GetExportedTypes())
                {
                    //typeof(IPlugin).IsAssignableFrom(t)判断t这种类型是否实现了接口
                    if (typeof(IPlugin).IsAssignableFrom(t) && t.IsClass && !t.IsAbstract)
                    {
                        IPlugin ip = Activator.CreateInstance(t) as IPlugin;
                        ToolStripItem tsi = TSMITools.DropDownItems.Add(ip.PluginName);
                        tsi.Tag = ip;
                        tsi.Click += new EventHandler(tsi_Click);
                    }
                }
            }
        }

        void tsi_Click(object sender, EventArgs e)
        {
            ToolStripItem tsi = sender as ToolStripItem;
            IPlugin ip = tsi.Tag as IPlugin;
            if (ip != null) 
            {
               string r = ip.Execute(textBox1.Text);
               if (!string.IsNullOrEmpty(r))
               {
                   MessageBox.Show(r);
               }
            }
        }


//关机插件
public class Cmd:IPlugin
    {
        public string PluginName
        {
            get 
            {
                return "关机插件";
            }
        }

        public string Execute(string param)
        {
            ShutDown(param);
            return "";
        }

        public void ShutDown(string second)
        {
            Process process = new Process();
            process.StartInfo.FileName = "cmd.exe";
            process.StartInfo.UseShellExecute = false;
            process.StartInfo.RedirectStandardInput = true;
            process.StartInfo.RedirectStandardOutput = true;
            process.StartInfo.RedirectStandardError = true;
            process.StartInfo.CreateNoWindow = true;
            process.Start();
            process.StandardInput.WriteLine("shutdown -s -f -t " + second);
            //process.StandardInput.WriteLine("dir c:");
            process.StandardInput.WriteLine("exit");

            process.Close();
        }
    }


//字典插件
public class Dic:IPlugin
    {
        public string PluginName
        {
            get { return "字典插件"; }
        }

        public string Execute(string param)
        {
            return Translate(param);
        }
   
        public string Translate(string key)
        {
            Dictionary<string, string> dic = new Dictionary<string, string>();
            dic.Add("english", "英语");
            dic.Add("chinese", "中文");
            dic.Add("eat", "吃");
            dic.Add("dog", "狗");
            if (dic.ContainsKey(key))
            {
                return dic[key];
            }
            else 
            {
                return null;
            }
        }
    }

Type type = typeof(Person);
MethodInfo method = type.GetMethod("SayHi", BindingFlags.NonPublic | BindingFlags.Instance);

object obj = Activator.CreateInstance(type);
method.Invoke(obj, null);

 public class Person
    {
        private void SayHi()
        {
            Console.WriteLine("hi!");
        }
    }

可以使用new关键字调用匿名初始化器创建一个匿名类型的对象。匿名类型直接继承自System. Object。