Process.Start导致我的WPF程序崩溃
本文关键字:WPF 程序 崩溃 我的 Start Process | 更新日期: 2023-09-27 18:27:49
我有一个WPF程序,它在进程中打开Word文档,等待进程完成后再继续。如果我让Word打开几个小时,我的程序就会崩溃。
当进程运行时,我可以看到应用程序的内存在稳步增加。
我尝试了两种方法,但都有相同的记忆力问题。
路#1
public void ShowExternalReference(string externalRef, bool waitForCompletion)
{
if (!string.IsNullOrEmpty(externalRef))
{
using (var p = Process.Start(@externalRef))
{
if (waitForCompletion)
{
// Wait for the window to finish loading.
p.WaitForInputIdle();
// Wait for the process to end.
p.WaitForExit();
}
}
}
}
2路
public void ShowExternalReference(string externalRef, bool waitForCompletion)
{
if (!string.IsNullOrEmpty(externalRef))
{
using (var p = Process.Start(@externalRef))
{
if (waitForCompletion)
{
while (!p.HasExited)
{
Thread.Sleep(1000);
}
}
}
}
}
有什么想法吗?
我读过评论,很长一段时间以来,WaitForExit()
似乎存在内存问题。
所以我会这样做:
- 启动进程并仅检索其PID
- 定期检查流程是否仍处于活动状态
也许这不会产生同样的记忆问题。
我的建议:
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
private System.Threading.Timer _timer;
public MainWindow()
{
InitializeComponent();
this.Content = new TextBlock() { Text = "Close notepad.exe when you want..." };
// - Launch process
Process p = Process.Start("notepad.exe");
int processId = p.Id;
_timer = new System.Threading.Timer(new System.Threading.TimerCallback(o => CheckPID((int)o)), processId, 0, 1000);
}
/// <summary>
/// Check if Process has exited
/// </summary>
/// <remarks>This code is NOT in UI Thread</remarks>
/// <param name="processId">Process unique ID</param>
private void CheckPID(int processId)
{
bool stillExists = false;
//Process p = Process.GetProcessById(processId); // - Raises an ArgumentException if process has alredy exited
Process p = Process.GetProcesses().FirstOrDefault(ps => ps.Id == processId);
if (p != null)
{
if (!p.HasExited)
stillExists = true;
}
// - If process has exited, do remaining work and stop timer
if (!stillExists)
{
_timer.Dispose();
// - Ask UI thread to execute the final method
Dispatcher.BeginInvoke(new Action(ExternalProcessEnd), null);
}
}
/// <summary>
/// The external process is terminated
/// </summary>
/// <remarks>Executed in UI Thread</remarks>
private void ExternalProcessEnd()
{
MessageBox.Show("Process has ended");
}
}
缺点是我们将无法检索StandardOutput、StandardError和ExitStatus。