C# 多任务网段扫描练习

阳光穿透心脏的1/2处 2022-07-16 00:39 137阅读 0赞

创建一个WPF应用程序，用多任务来扫描一个网段内的计算机，根据计算机的IP地址获取其主机名，程序运行结果如下：

![示例][20160925160623834]

![示例][20160925160652756]

![示例][20160925160745792]

废话不多说，直接上代码

using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Net;
    using System.Text;
    using System.Threading;
    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;
    
    namespace A._2
    {
        /// <summary>
        /// MainWindow.xaml 的交互逻辑
        /// </summary>
        public partial class MainWindow : Window
        {
            int n = 0;
            DateTime taskBegin = DateTime.Now;
            public MainWindow()
            {
                InitializeComponent();
                textBox_first.Text = "192.168.1.";
                textBox_start.Text = "102";
                textBox_end.Text = "105";
            }
    
            private void textBox_TextChanged(object sender, TextChangedEventArgs e)
            {
                IPAddress ipstart;
                IPAddress ipend;
                if (IPAddress.TryParse(textBox_first.Text + textBox_start.Text, out ipstart)&& IPAddress.TryParse(textBox_first.Text + textBox_end.Text, out ipend))
                {
                    errorLable.Visibility = Visibility.Hidden;
                }
                else
                {
                    errorLable.Visibility = Visibility.Visible;
                }
            }
    
            private void button_Click(object sender, RoutedEventArgs e)
            {
                IPAddress ipstart;
                IPAddress ipend;
                listBox.Items.Clear();
                n = int.Parse(textBox_end.Text) - int.Parse(textBox_start.Text) + 1;
                if (IPAddress.TryParse(textBox_first.Text + textBox_start.Text, out ipstart) && IPAddress.TryParse(textBox_first.Text + textBox_end.Text, out ipend))
                {
                    errorLable.Visibility = Visibility.Hidden;
                    for (int i= int.Parse(textBox_start.Text); i<=int.Parse(textBox_end.Text);i++){
        
                        IPAddress ip = IPAddress.Parse(textBox_first.Text+i.ToString());
                        Thread t = new Thread(scan);
                        t.Start(ip);
                    }
                }
                else
                {
                    errorLable.Visibility = Visibility.Visible;
                }
            }
    
            private void scan(Object ip)
            {
                DateTime begin = DateTime.Now;
                IPAddress ipAddress = (IPAddress)ip;
                string hostName;
                try
                {
                    hostName = Dns.GetHostEntry(ipAddress).HostName;
                }
                catch
                {
                    hostName = "(不在线)";
                }
                DateTime end = DateTime.Now;
                TimeSpan ts = end - begin;
                listBox.Dispatcher.Invoke(() => listBox.Items.Add("扫描地址："+ ipAddress.ToString()+" 扫描用时："+ ts.TotalMilliseconds+ "毫秒 " + " 主机名称：" +hostName));
                n--;
                if (n == 0) {
                    DateTime taskEnd = DateTime.Now;
                    TimeSpan taskAll = taskEnd - taskBegin;
                    MessageBox.Show("扫描完毕!总用时:"+ taskAll.TotalMilliseconds + "毫秒");
                }
    
            }
        }
    }

此程序还可以细致化一下，比如，起始值不能大于终止值，地址前缀后面的点，程序可以自动补全，错误提示细致化等等。

[20160925160623834]: /images/20220716/eb9d43214db54d2b9532784b37dd2627.png
[20160925160652756]: /images/20220716/553b1b091f61475d8f8b71e30a9fef3e.png
[20160925160745792]: /images/20220716/edf91a69bd9243a19c4e2839d21b67d3.png