{

          if (e.KeyCode == Keys.Enter)

          {

              int count = txtCmdInput.Lines.Length;

              if (count == 0) return;

              while (count > 0 && (string.IsNullOrEmpty(txtCmdInput.Lines[count - 1])))

              {

                  count--;

              }

              if (count > 0)// && !string.IsNullOrEmpty(txtCmdInput.Lines[count - 1]))

                  ExecuteCmd(txtCmdInput.Lines[count - 1]);

          }

      }

      public void ExecuteCmd(string cmd)

      {

          System.Diagnostics.Process p = new System.Diagnostics.Process();

          p.StartInfo.FileName = "cmd.exe";

          p.StartInfo.UseShellExecute = false;

          p.StartInfo.RedirectStandardInput = true;

          p.StartInfo.RedirectStandardOutput = true;

          p.StartInfo.RedirectStandardError = true;

          p.StartInfo.CreateNoWindow = true;

          p.Start();                                  //設置自動刷新緩沖并更新   

          p.StandardInput.AutoFlush = true;           //寫入命令     

          p.StandardInput.WriteLine(cmd);

          p.StandardInput.WriteLine("exit");          //等待結束  

          txtCmdInput.AppendText(p.StandardOutput.ReadToEnd());

          p.WaitForExit();

          p.Close();

      }