private void DosCommand_bn_Click(object sender, EventArgs e) { TreeNode tn = trv_HostView.SelectedNode; if (tn != null && tn.Tag != null) { GeneralControler.RunDosCommand(tn.Tag, this.DosCommand_tB.Text); this.DosCommand_tB.Text = ""; } else { MessageBox.Show("当前主机已经断开了连接,请移除它,然后再连接"); } }