private void but_server_Click(object sender, EventArgs e) { try { if (txt_content.Text.Contains("小技巧")) { txt_content.Text = string.Empty; } server?.Stop(); server = new SiemensServer(int.Parse(txt_port.Text.Trim())); server.Start(); but_server.Enabled = false; but_close_server.Enabled = true; AppendText($"开启仿真模拟服务"); } catch (Exception ex) { MessageBox.Show(ex.Message); } }