C#網段掃描練習

MainActivity.xaml

<Window x:Class="網段掃描練習.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:網段掃描練習"
        mc:Ignorable="d"
        Title="網段掃描" Height="450" Width="800">
    <Grid>
        <GroupBox x:Name="groupBox" Header="掃描的IP地址範圍" HorizontalAlignment="Left" Margin="34,22,0,0" VerticalAlignment="Top" Height="95" Width="637" BorderThickness="3">
            <Grid HorizontalAlignment="Left" Height="77" Margin="10,0,0,-4" VerticalAlignment="Top" Width="600">
                <Label x:Name="label1" Content="地址前綴:" HorizontalAlignment="Left" Margin="19,26,0,0" VerticalAlignment="Top"/>
                <Label x:Name="label2" Content="起始值:" HorizontalAlignment="Left" Margin="184,28,0,0" VerticalAlignment="Top"/>
                <Label x:Name="label3" Content="終止值:" HorizontalAlignment="Left" Margin="338,28,0,0" VerticalAlignment="Top"/>
                <TextBox x:Name="textBox1" HorizontalAlignment="Left"  Margin="93,30,0,0" TextWrapping="Wrap" Text="請輸入" VerticalAlignment="Top" Width="86" Height="20" Background="#FFBBB5B5"/>
                <TextBox x:Name="textBox2" HorizontalAlignment="Left" Margin="238,30,0,0" TextWrapping="Wrap" Text="請輸入" VerticalAlignment="Top" RenderTransformOrigin="2.389,0.574" Width="86" Height="20" Background="#FFBBB5B5"/>
                <TextBox x:Name="textBox3" HorizontalAlignment="Left" Margin="392,30,0,0" TextWrapping="Wrap" Text="請輸入" VerticalAlignment="Top" RenderTransformOrigin="2.389,0.574" Width="86" Height="20" Background="#FFBBB5B5"/>
                <Button x:Name="begin" Content="開始掃描" HorizontalAlignment="Left" Margin="505,28,0,0" VerticalAlignment="Top" Width="75"/>
            </Grid>
        </GroupBox>
        <GroupBox x:Name="groupBox1" Header="掃描信息" HorizontalAlignment="Left" Margin="34,145,0,0" VerticalAlignment="Top" Height="157" Width="637" BorderThickness="3">
            <ListBox x:Name="listBox" HorizontalAlignment="Left" Height="131" VerticalAlignment="Top" Width="627" Margin="0,0,-2,0"/>
        </GroupBox>
        <Label x:Name="error" Content="IP地址有錯，請更正！" HorizontalAlignment="Left" Margin="0,122,0,0" VerticalAlignment="Top" Width="681" Background="#FFD43939"  Foreground="#FFF3ECEC" Visibility="Hidden" HorizontalContentAlignment="Center"/>
    </Grid>
</Window>

MainActivity.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
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;

namespace 網段掃描練習
{
    /// <summary>
    /// MainWindow.xaml 的交互邏輯
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            begin.Click += Begin_Click;
        }

        //創建兩個IPAddress的對象，分別用來保存開始的IP地址和結束的IP地址
        IPAddress IpStart, IpEnd;

        //開始掃描按鈕點擊事件方法
        private async void Begin_Click(object sender,RoutedEventArgs e)
        {
            //將listbox控件清空
            listBox.Items.Clear();
            String input1 = textBox1.Text;
            String input2 = textBox2.Text;
            String input3 = textBox3.Text;
            int int_input2;
            int int_input3;
            //將第二個輸入框的內容轉化爲int類型
            int_input2 = int.Parse(input2);
             //將第三個輸入框的內容轉化爲int類型
             int_input3 = int.Parse(input3);
            int count = 0;//計數器
            int k = input1.Length;//記錄input1的長度

            //判斷第一個輸入框有沒有在最後加'.'，若沒有則補上(代碼的健壯性)
            if (!input1[k - 1].Equals('.'))
            {
                input1 = input1 + '.';
            }
            //將輸入的內容進行拼接並轉化爲地址，判斷第二個輸入框是否小於第三個輸入框
            //如果不能正確的轉化爲IP地址或者第二個框內容不小於第三個框，顯示錯誤提示信息
            if(IPAddress.TryParse(input1+input2,out IpStart) && IPAddress.TryParse(input1 + input3, out IpEnd) && (int_input2 <= int_input3))
            {
                count = int_input3 - int_input2 + 1;
                tips_hidden();//輸入正確，隱藏錯誤提示信息
            }
            else
            {
                tips();//輸入錯誤，顯示錯誤提示信息
            }
            for(int i = 0; i < count; i++)
            {
                String ipString = input1 + (int.Parse(input2) + i);
                IPAddress ip = IPAddress.Parse(ipString);
                await Task.Run(() => scan(ip));
                // scan(ip); //主線程

                /*Thread t = new Thread(scan); 多線程
                  t.Start(ip);                 多線程*/

                //Task.Run(() => scan(ip));//多任務

                //ThreadPool.QueueUserWorkItem(new WaitCallback(scan), ip);//線程池
            }
        }

        public void tips()//顯示輸入錯誤的信息
        {
            error.Visibility = Visibility.Visible;
        }

        public void tips_hidden()//隱藏輸入錯誤提示信息
        {
            error.Visibility = Visibility.Hidden;
        }

        public void scan(Object ip)//掃描方法並記錄掃描時間
        {
            DateTime timeBegin = DateTime.Now;//記錄開始時間
            IPAddress iPAddress = (IPAddress)ip;//強制類型轉換
            String hostName;//主機名
            try
            {
                hostName = Dns.GetHostEntry(iPAddress).HostName;//通過DNS獲取主機名
            }
            catch (Exception e)
            {
                hostName = "(不在線)";
            }
            DateTime timeEnd = DateTime.Now;//記錄結束時間
            TimeSpan timeSpan = timeEnd - timeBegin;//時間間隔

            //WPF調度器 裏面是lambda表達式
            listBox.Dispatcher.Invoke(() => listBox.Items.Add("掃描地址：" + ip + "，" + "掃描時間：" + timeSpan.Milliseconds + "毫秒，" + "主機DNS名稱：" + hostName));
        }
    }
}