如何使用 C# 终止进程。
使用简单的方法终止.NET中的现有进程Process.Kill()。有一个可选参数 true 或 false，用于结束与要结束的进程相关的所有子进程。
了解如何创建流程。
结束当前进程：
System.Diagnostics.Process.GetCurrentProcess().Kill(true);
结束当前计算机上所有名为"notepad"的进程：
static void KillAllNotepadProcesses()
{
System.Diagnostics.Process[] procs = System.Diagnostics.Process.GetProcessesByName("notepad", "."); // use "." for this machine
foreach (var proc in procs)
proc.Kill(true);
}
要结束另一台计算机上名为"notepad"的所有进程：
static void KillAllNotepadProcesses()
{
System.Diagnostics.Process[] procs = System.Diagnostics.Process.GetProcessesByName("notepad", "Machine-Name-or-IP-Address"); // enter the IP address or machine name
foreach (var proc in procs)
proc.Kill(true);
}
结束当前进程的所有其他实例：
static void KillAllOtherInstances()
{
System.Diagnostics.Process thisProc = System.Diagnostics.Process.GetCurrentProcess();
System.Diagnostics.Process[] procs = System.Diagnostics.Process.GetProcessesByName(thisProc.ProcessName, "."); // use "." for this machine
foreach (var proc in procs)
if (proc.Id != thisProc.Id) // the process Id is unique across all processes while the process name can be common
proc.Kill(true);
}
完整的现实示例：
为了扩展上述代码片段，我们准备了以下代码。它使用强力算法来解决π，这对 CPU 来说非常耗电。因此，它会终止（杀死）自身的所有其他实例，以防止机器负担过重。编译此代码并尝试运行多个实例！
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
namespace KillOtherInstancesAndSolvePI
{
class JobTask
{
public Task task { get; }
public int id { get; }
public double pi { get; set; }
public ulong iterations { get; set; }
public CancellationTokenSource CancelToken { get; }
public JobTask(int id)
{
this.id = id;
CancelToken = new CancellationTokenSource();
task = Task.Run(async () => // async not necessary in this example
{
var spaces = Environment.ProcessorCount.ToString().Length;
iterations = (ulong)new Random().Next() * 10;
Console.WriteLine("Started Job: {0, -" + spaces + "} Iterations: {1}", id, iterations);
pi = SolvePi(iterations, CancelToken);
Console.WriteLine("Job: {0, -" + spaces + "} ended with pi={1}", id, pi.ToString("0.00000000000000"));
}, CancelToken.Token);
}
static double SolvePi(ulong count, CancellationTokenSource cancel)
{
//π = 3.14159265358979323846264338327950288419...
//π = (4/1) - (4/3) + (4/5) - (4/7) + (4/9) - (4/11) + (4/13) - (4/15) + ...
//π = 4 * (1 - 1/3 + 1/5 - 1/7 + 1/9 - 1/11 + 1/13 - 1/15 + ...)
double x = 1.0;
for (ulong i = 2; !cancel.IsCancellationRequested & (i < count); i++)
{
if ((i & 1) == 0)
x -= 1.0 / ((i << 1) - 1);
else
x += 1.0 / ((i << 1) - 1);
}
return 4.0 * x;
}
}
class Program
{
static void KillAllOtherInstances()
{
System.Diagnostics.Process thisProc = System.Diagnostics.Process.GetCurrentProcess();
System.Diagnostics.Process[] procs = System.Diagnostics.Process.GetProcessesByName(thisProc.ProcessName, ".");
foreach (var proc in procs)
if (proc.Id != thisProc.Id)
proc.Kill(true);
}
static void Main(string[] args)
{
KillAllOtherInstances(); // end the other process before trying to solve PI
var jobTasks = new List<JobTask>();
Console.WriteLine("pi={0}", 3.1415926535897932384626433833.ToString("0.00000000000000"));
Console.WriteLine("Logical Processors: {0}", Environment.ProcessorCount);
Console.WriteLine("ENTER JOB NUMBER TO TERMINATE AT ANYTIME");
var spaces = Environment.ProcessorCount.ToString().Length;
int[] jobsIds = new int[Environment.ProcessorCount];
for (int i = 0; i < Environment.ProcessorCount; i++)
jobsIds[i] = i;
foreach(var jobId in jobsIds)
jobTasks.Add(new JobTask(jobId));
Thread.Sleep(250);
foreach (var j in jobTasks.OrderBy(j => j.iterations))
Console.WriteLine("Job: {0, -" + spaces + "} Iterations: {1}", j.id, j.iterations);
Task.Run(() => // create a task to terminate the app when all pi tasks are done
{
while (jobTasks.Where(j => j.task.IsCompleted == false).Count() > 0)
Thread.Sleep(250);
Environment.Exit(0);
});
while (jobTasks.Where(j => j.task.IsCompleted == false).Count() > 0) // look for a request to cancel a job from the user
{
var id = Console.ReadLine();
JobTask jt = jobTasks.Where(j => j.id.ToString() == id).FirstOrDefault();
if(jt != null)
jt.CancelToken.Cancel();
}
}
}
}
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