WPF_Practice/PacticeSolution/TelnetCommunicator/MainWindow.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Threading;
using TelnetCommunicator.Telnet;

namespace TelnetCommunicator
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private TAP _tap;

        public MainWindow()
        {
            InitializeComponent();
            InitInstance();
        }

        private void InitInstance()
        {
            _tap = new TAP("200.200.200.123", 23);
            _tap.ErrorHandler -= On_Received;
            _tap.ErrorHandler += On_Received;
        }

        private async void btnStatus_Click(object sender, RoutedEventArgs e)
        {
            string response = await _tap.SendMessage("STA");
            //tbMessage.AppendText(GetInfo(response) + Environment.NewLine);
            tbMessage.AppendText(response + Environment.NewLine);
            tbMessage.ScrollToEnd();

            if (CheckConnectionError(response))
            {
                InitInstance();
            }
        }

        private void On_Received(object sender, Exception e)
        {
            Dispatcher.BeginInvoke(DispatcherPriority.Normal, new Action(() =>
            {
                tbMessage.AppendText(e.Message + Environment.NewLine);
                tbMessage.ScrollToEnd();
            }));
        }

        private bool CheckConnectionError(string message)
        {
            string[] lines = message.Split(Environment.NewLine, StringSplitOptions.RemoveEmptyEntries);
            foreach (string line in lines)
            {
                if (line.IndexOf("trouble") > 0)
                    return true;
            }

            return false;
        }

        private string GetInfo(string message)
        {
            string[] lines = message.Split(Environment.NewLine, StringSplitOptions.RemoveEmptyEntries);
            foreach (string line in lines)
            {
                if (line.IndexOf("Serial Num:") < 0)
                    continue;

                string tmp = line.ToLower().Replace(" ", "");
                return tmp.Substring(tmp.IndexOf(":") + 1);
            }

            return "";
        }
    }
}