進程關閉后刪除文件。 C＃Windows表單

Question

我有一個Windows Forms應用程序，該應用程序在運行時使用臨時文件，並在關閉主窗體后將其刪除。 關鍵是，如果我通過殺死進程從任務管理器中關閉程序，該文件不會被刪除。

當以某種方式（而不是表單）關閉該進程時，是否可以自動刪除文件？

Answer 1

您可以按照此用例的FileOptions枚舉文檔中的描述使用FileOptions.DeleteOnClose 。

文檔狀態為DeleteOnClose ：

指示不再使用文件時將其自動刪除。

Answer 2

另一個解決方案（非常容易理解）是，如果您的進程存在，則使用陷阱陷阱，我在很多程序中都使用此解決方案進行監督（我不是該想法的作者，不記得我在哪里找到了這個想法，我剛剛修改了代碼）：您可以在退出的事件中刪除臨時文件。

    static void Main(string[] args)
    {
        //Main App Process.
        if (args.Length == 0)
        {
            //Saves current process info to pass on command line.
            main = Process.GetCurrentProcess();
            mainProcessID = main.Id;

            //Initializes the helper process
            checker = new Process();
            checker.StartInfo.FileName = main.MainModule.FileName;
            checker.StartInfo.Arguments = mainProcessID.ToString();

            checker.EnableRaisingEvents = true;
            checker.Exited += new EventHandler(checker_Exited);

            //Launch the helper process.
            checker.Start();

            Application.Run(new MainForm()); // your winform app
        }
        else //On the helper Process
        {
            main = Process.GetProcessById(int.Parse(args[0]));

            main.EnableRaisingEvents = true;
            main.Exited += new EventHandler(main_Exited);

            while (!main.HasExited)
            {
                Thread.Sleep(1000); //Wait 1 second. 
            }

            //Provide some time to process the main_Exited event. 
            Thread.Sleep(2000);
        }
    }

    //Double checks the user not closing the checker process.
    static void checker_Exited(object sender, EventArgs e)
    {           
        //This only checks for the task manager process running. 
        //It does not make sure that the app has been closed by it. But close enough.
        //If you can think of a better way please let me know.
        if (Process.GetProcessesByName("taskmgr").Length != 0)
        {
            MessageBox.Show("Task Manager killed helper process.");

            //If you like you could kill the main app here to. 
            //main.Kill();
        }
    }

    //Only gets to run on the checker process. The other one should be dead. 
    static void main_Exited(object sender, EventArgs e)
    {
        //This only checks for the task manager process running. 
        //It does not make sure that the app has been closed by it. But close enough.
        //If you can think of a better way please let me know.

        if (Process.GetProcessesByName("taskmgr").Length != 0)
        {
            MessageBox.Show("Task Manager killed my application.");
        }
    }

必須有更好的方法來檢查是否被殺死，或者是在任務管理器中捕獲一條消息，或者掛接到任務管理器。 但是，解決方案變得更加復雜