C#多進程並行

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為了並存執行多個任務，可以啟動多個進程（並行數）。

下面提供兩種方法，總任務數10，最大並行數4。

一、方法1

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Diagnostics;using System.Threading;namespace 進程並行{   public class StartProcess1    {        int totalProcess = 10;//總任務數        int maxParallelProcess = 4;//並行最大進程數        int curRunningProcess = 0;//當前運行進程數        public void Do()        {            DoEvents();        }        /// <summary>        /// 執行進程        /// </summary>        private  void DoEvents()        {            for (int i = 0; i < totalProcess; i++)            {                ProcessStartInfo processInfo = new ProcessStartInfo();                processInfo.FileName = @"C:\進程.exe";                processInfo.Arguments = (i + 1).ToString();                Process pro = new Process();                pro.EnableRaisingEvents = true;                pro.StartInfo = processInfo;                pro.Exited += new EventHandler(process_Exited);                pro.Start();                //pro.WaitForExit(18000);                curRunningProcess++;                //如果大於最大並行數，就等待進程退出，是並行數不超過最大並行數                while (curRunningProcess >= maxParallelProcess)                {                    if (i >= totalProcess - 1)                    { return; }                }            }        }        /// <summary>        /// 進程結束        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>       private void process_Exited(object sender, EventArgs e)        {            curRunningProcess--;        }    }}

二、方法2

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Diagnostics;using System.Threading;namespace 進程並行{   public class StartProcess2    {        static int totalProcess = 10;//總任務數        static int maxParallelProcess = 4;//並行最大進程數        static int doneProcess = 0;//已經執行完的進程數        static int toPro = 0;//第一次啟動的進程數        public  void Do2()        {            //當總任務數小於進程並行數時啟動totalProcess個進程            toPro = totalProcess < maxParallelProcess ? totalProcess : maxParallelProcess;            for (int i = 0; i < toPro; i++)            {                doneProcess++;                DoEvents2();            }            //任務全部執行後再結束主進程            while (doneProcess < totalProcess)            {            }        }        /// <summary>        /// 執行進程        /// </summary>        private  void DoEvents2()        {            ProcessStartInfo processInfo = new ProcessStartInfo();            processInfo.FileName = @"C:\進程.exe";            processInfo.Arguments = (doneProcess).ToString();            Process pro = new Process();            pro.EnableRaisingEvents = true;            pro.StartInfo = processInfo;            pro.Exited += new EventHandler(process_Exited2);            pro.Start();            //pro.WaitForExit(18000)//等待最多18秒退出進程        }        /// <summary>        /// 進程結束        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>       private void process_Exited2(object sender, EventArgs e)        {            doneProcess++;            toPro--;//第一次要啟動的四個進程還沒有完全啟動            if (doneProcess <= totalProcess)            {                DoEvents2();//結束一個進程，再啟動一個進程            }        }    }}

三、進程

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Diagnostics;using System.Threading;namespace 進程{    class Program    {        static void Main(string[] args)        {            Console.WriteLine(string.Format("這是第{0}個進程", args));            Thread.Sleep(3000);        }    }}

四、使用者調用

<Window x:Class="進程並行.MainWindow"        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        Title="MainWindow" Height="350" Width="525">    <Window.Resources>        <Style TargetType="Button">            <Setter Property="Width" Value="50"></Setter>            <Setter Property="Height" Value="50"></Setter>            <Setter Property="HorizontalAlignment" Value="Center"></Setter>            <Style.Triggers>                <Trigger Property="IsMouseOver" Value="true">                    <Setter Property="Background" Value="Blue"></Setter>                </Trigger>            </Style.Triggers>        </Style>    </Window.Resources>    <Grid>        <Grid.RowDefinitions>            <RowDefinition></RowDefinition>            <RowDefinition></RowDefinition>        </Grid.RowDefinitions>        <Button Click="Button_Click_1">方法1</Button>        <Button Grid.Row="1" Click="Button_Click_2">方法2</Button>    </Grid></Window>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;namespace 進程並行{    /// <summary>    /// MainWindow.xaml 的互動邏輯    /// </summary>    public partial class MainWindow : Window    {        public MainWindow()        {            InitializeComponent();        }        /// <summary>        /// 方法1        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void Button_Click_1(object sender, RoutedEventArgs e)        {            StartProcess1 proStart1 = new StartProcess1();            proStart1.Do();        }        /// <summary>        /// 方法2        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void Button_Click_2(object sender, RoutedEventArgs e)        {            StartProcess2 proStart2 = new StartProcess2();            proStart2.Do2();        }    }}

 

C#多進程並行