Process.HasExited 属性
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
获取一个值，该值指示关联的进程是否已终止。
public:
property bool HasExited { bool get(); };public bool HasExited { get; }[System.ComponentModel.Browsable(false)]
public bool HasExited { get; }member this.HasExited : bool[<System.ComponentModel.Browsable(false)>]
member this.HasExited : boolPublic ReadOnly Property HasExited As Boolean属性值
- 属性
例外
没有与对象关联的进程。
无法检索进程的退出代码。
你正在尝试访问 HasExited 远程计算机上运行的进程的属性。 此属性仅适用于在本地计算机上运行的进程。
示例
以下示例启动记事本的实例。 然后，它会以 2 秒的间隔检索关联进程的物理内存使用量，最长为 10 秒。 该示例检测进程是否在 10 秒前退出。 该示例在 10 秒后仍在运行时关闭进程。
using System;
using System.ComponentModel;
using System.Diagnostics;
using System.IO;
using System.Threading;
namespace ProcessSample
{
class MyProcessClass
{
public static void Main()
{
try
{
using (Process myProcess = Process.Start("Notepad.exe"))
{
// Display physical memory usage 5 times at intervals of 2 seconds.
for (int i = 0; i < 5; i++)
{
if (!myProcess.HasExited)
{
// Discard cached information about the process.
myProcess.Refresh();
// Print working set to console.
Console.WriteLine($"Physical Memory Usage: {myProcess.WorkingSet}");
// Wait 2 seconds.
Thread.Sleep(2000);
}
else
{
break;
}
}
// Close process by sending a close message to its main window.
myProcess.CloseMainWindow();
// Free resources associated with process.
myProcess.Close();
}
}
catch (Exception e) when (e is Win32Exception || e is FileNotFoundException)
{
Console.WriteLine("The following exception was raised: ");
Console.WriteLine(e.Message);
}
}
}
}
open System.ComponentModel
open System.Diagnostics
open System.IO
open System.Threading
try
use myProcess = Process.Start "Notepad.exe"
// Display physical memory usage 5 times at intervals of 2 seconds.
let mutable i = 0
while i < 5 && not myProcess.HasExited do
// Discard cached information about the process.
myProcess.Refresh()
// Print working set to console.
printfn $"Physical Memory Usage: {myProcess.WorkingSet64}"
// Wait 2 seconds.
Thread.Sleep 2000
i <- i + 1
// Close process by sending a close message to its main window.
myProcess.CloseMainWindow() |> ignore
// Free resources associated with process.
myProcess.Close()
with
| :? Win32Exception
| :? FileNotFoundException as e ->
printfn "The following exception was raised: "
printfn $"{e.Message}"
Imports System.ComponentModel
Imports System.Diagnostics
Imports System.IO
Imports System.Threading
Namespace Process_Sample
Class MyProcessClass
Public Shared Sub Main()
Try
Using myProcess = Process.Start("Notepad.exe")
' Display physical memory usage 5 times at intervals of 2 seconds.
Dim i As Integer
For i = 0 To 4
If Not myProcess.HasExited Then
' Discard cached information about the process.
myProcess.Refresh()
' Print working set to console.
Console.WriteLine($"Physical Memory Usage: {myProcess.WorkingSet}")
' Wait 2 seconds.
Thread.Sleep(2000)
Else
Exit For
End If
Next i
' Close process by sending a close message to its main window.
myProcess.CloseMainWindow()
' Free resources associated with process.
myProcess.Close()
End Using
Catch e As Exception When TypeOf e Is Win32Exception Or TypeOf e Is FileNotFoundException
Console.WriteLine("The following exception was raised: ")
Console.WriteLine(e.Message)
End Try
End Sub
End Class
End Namespace 'Process_Sample
注解
一个值trueHasExited，指示关联进程已正常终止或异常。 可以通过调用CloseMainWindow或强制关联进程退出。Kill 如果句柄对进程打开，则操作系统会在进程退出时释放进程内存，但保留有关进程的管理信息，例如句柄、退出代码和退出时间。 若要获取此信息，可以使用和ExitCodeExitTime属性。 这些属性会自动填充此组件启动的进程。 当与系统进程关联的所有 Process 组件被销毁并不再保留退出进程的句柄时，将释放管理信息。
进程可以独立于代码终止。 如果使用此组件启动进程，系统会自动更新值 HasExited ，即使关联的进程独立退出也是如此。
注释
当标准输出重定向到异步事件处理程序时，当此属性返回 true时，输出处理可能尚未完成。 若要确保异步事件处理已完成，请在检查WaitForExit()之前调用不带参数的HasExited重载。
