一个端口操作类PortHelper

　　此操作类主要使用了系统命令行来实现的，详细的命令可参照微软文档《如何使用"netsh advfirewall firewall"上下文而非“netsh firewall”上下文来控制 Windows Server 2008 和 Windows Vista 中的 Windows 防火墙行为》，而检查端口部分则利用Socket判断端口是否被占用，但是在也会有判断失灵的时候。

     public static class PortHelper
     {
         #region 命令原型
         //netsh firewall delete allowedprogram [AppPath]

         //netsh firewall add allowedprogram [appPath] [portName] ENABLE 

         //netsh firewall add portopening [ALL|TCP|UDP] [portID] [portName]

         //netsh firewall delete portopening [ALL|TCP|UDP] [portID]
         #endregion

         /// <summary>
         /// 判定指定端口号有否被占用
         /// </summary>
         /// <param name="portId">端口号</param>
         /// <returns></returns>
         public static bool IsAvaliable(int portId)
         {
             bool result;
             IPEndPoint point = new IPEndPoint(IPAddress.Parse("127.0.0.1"), portId);
             Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
             try
             {
                 socket.Bind(point);
                 result = true;
             }
             catch (Exception ex)
             {
                 result = false;
             }
             finally
             {
                 socket.Close();
                 socket.Dispose();
                 socket = null;
             }
             return result;
         }

         #region 指定端口号

         /// <summary>
         /// 开放指定端口
         /// </summary>
         /// <param name="portName">端口名称</param>
         /// <param name="portId">端口号</param>
         /// <param name="type">协议类型</param>
         /// <returns></returns>
         public static bool OpenPortByID(string portName, int portId,ProtocolTypeName type)
         {
             string arg = string.Format("firewall add portopening {0} {1} {2}", type, portId, portName);
             string cmdResult = RunCMD("netsh", arg);
             if (cmdResult.Contains("确定"))
                 return true;
             return false;
         }

         /// <summary>
         /// 开放指定的所有类型端口
         /// </summary>
         /// <param name="portName">端口名称</param>
         /// <param name="portId">端口号</param>
         /// <returns></returns>
         public static bool OpenPortByID(string portName, int portId)
         {
             return OpenPortByID(portName, portId, ProtocolTypeName.ALL);
         }

         /// <summary>
         /// 删除指定的所有类型端口
         /// </summary>
         /// <param name="portId">端口号</param>
         /// <returns></returns>
         public static bool DeletePortByID(int portId)
         {
             return DeletePortByID(portId, ProtocolTypeName.ALL);
         }

         /// <summary>
         /// 删除指定的端口
         /// </summary>
         /// <param name="portId">端口号</param>
         /// <param name="type">协议类型</param>
         /// <returns></returns>
         public static bool DeletePortByID(int portId, ProtocolTypeName type)
         {
             string arg = string.Format("firewall delete portopening {0} {1}", type, portId);
             string cmdResult = RunCMD("netsh", arg);
             if (cmdResult.Contains("确定"))
                 return true;
             return false;
         }

         #endregion

         #region 指定应用程序

         /// <summary>
         /// 为指定应用程序开放端口
         /// </summary>
         /// <param name="appPath">应用程序路径</param>
         /// <param name="portName">端口名称</param>
         /// <returns></returns>
         public static bool OpenPortAppName(string appPath,string portName)
         {
             string arg = string.Format("firewall add allowedprogram {0} {1} ENABLE",appPath,portName);
             string cmdResult = RunCMD("netsh", arg);
             if (cmdResult.Contains("确定"))
                 return true;
             return false;
         }

         /// <summary>
         /// 删除指定应用程序的端口
         /// </summary>
         /// <param name="appPath">应用程序路径</param>
         /// <returns></returns>
         public static bool DeletePortByAppName(string appPath)
         {
             string arg = string.Format("firewall delete allowedprogram {0}",appPath);
             string cmdResult = RunCMD("netsh", arg);
             if (cmdResult.Contains("确定"))
                 return true;
             return false;
         }

         #endregion

         /// <summary>
         /// 执行命令
         /// </summary>
         /// <param name="cmd">命令名称</param>
         /// <param name="arg">参数</param>
         /// <returns></returns>
         private static string RunCMD(string cmd, string arg)
         {
             Process pro = new Process();
             pro.StartInfo = new ProcessStartInfo(cmd, arg);
             pro.StartInfo.UseShellExecute = false;
             pro.StartInfo.RedirectStandardOutput = true;
             pro.Start();
             pro.WaitForExit();
             string outputText = pro.StandardOutput.ReadToEnd();
             return outputText;
         }
     }

     public enum ProtocolTypeName
     {
         ALL,
         TCP,
         UDP
     }