Visual C＃ - 當程序運行時如何將資源中的文件複製到磁盤中的文件夾？

Question

我無法創建在Visual C＃一個簡單的應用程序，即執行以下操作：

1. 大聲疾呼的固執尋求特定的進程。
2. 當該進程開始運行時，將資源複製到文件夾。
3. 當過程結束時，將另一個資源複製到該文件夾​​。

我試過使用定時器+線程，沒有成功。我認爲BackgroundWorker在這裏會有所幫助，但文檔相當不清楚。這是我當前的代碼：

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Diagnostics; 
using System.IO; 
using System.Linq; 
using System.Resources; 
using System.Text; 
using System.Threading; 
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 ResourceCopyApp 
{ 
    public partial class MainWindow : Window { 
     BackgroundWorker bw; 
     bool pcRunning = false; 
     public MainWindow() { 
      InitializeComponent(); 
      bw = new BackgroundWorker(); 
      bw.DoWork += new DoWorkEventHandler(Loop); 
      bw.RunWorkerAsync(); 
     } 

     private void Window_Loaded(object sender, RoutedEventArgs e) { 
      cfgInstall.Text = Properties.Settings.Default.pcLocation; 
      cfgLag.Value = Properties.Settings.Default.lag; 
     } 

     private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e) { 
      Properties.Settings.Default.pcLocation = cfgInstall.Text; 
      Properties.Settings.Default.lag = (int)cfgLag.Value; 
      Properties.Settings.Default.Save(); 
     } 

     public void Loop(object sender, DoWorkEventArgs e) { 
      pcRunning = false; 
      bool pcWasRunning = pcRunning; 
      if (pcRunning && !pcWasRunning) { 
       MessageBox.Show("Process found"); 
       pcWasRunning = true; 
       Swap(true); 
      } 
      foreach (Process p in Process.GetProcesses()) { 
       if (p.ProcessName.Equals("Process")) { 
        pcRunning = true; 
       } 
      } 
      if (!pcRunning && pcWasRunning) { 
       MessageBox.Show("Process lost"); 
       Swap(false); 
      } 
     } 
     public void Swap(bool v) { 
      byte[] file; 
      Thread.Sleep(new TimeSpan((long)cfgLag.Value)); 
      if (v) { 
       file = Properties.Resources.NewRes; 
      } else { 
       file = Properties.Resources.BackupRes; 
      } 
      string path = cfgInstall.Text; 
      if (!cfgInstall.Text.EndsWith("/") && !cfgInstall.Text.EndsWith("\\")) { 
       path = cfgInstall.Text + "/test.txt"; 
      } 
      File.WriteAllBytes(path, file); 

     } 
    } 
} 

Answer 1

正如我在評論中提到的，您當前的代碼只運行一次檢查，然後完成BackgroundWorker。你既可以：

• 使用定時器來尋找間歇過程（每分鐘說），沿您目前在Loop的代碼行。當過程開始時，您可以使用Process.WaitForExit()來暫停您的代碼，直到過程結束。要繼續讓你的程序響應，這部分應該在BackgroundWorker。當然，這種方法存在一個風險，即在計時器滴答之間，流程開始並迅速結束。在WMI中使用ManagementEventWatcher。 This文章在CodeProject定義要通知簡化了使用WMI類當一個進程啓動和停止：

  notePad = new ProcessInfo("notepad.exe"); 
  notePad.Started += 
      new Win32Process.ProcessInfo.StartedEventHandler(this.NotepadStarted); 
  notePad.Terminated += 
      new Win32Process.ProcessInfo.TerminatedEventHandler(this.NotepadTerminated); 
  

他們所使用的底層代碼如下：

string queryString = 
    "SELECT *" + 
    " FROM __InstanceOperationEvent " + 
    "WITHIN " + pol + 
    " WHERE TargetInstance ISA 'Win32_Process' " + 
    " AND TargetInstance.Name = '" + appName + "'"; 

    // You could replace the dot by a machine name to watch to that machine 
    string scope = @"\\.\root\CIMV2"; 

    // create the watcher and start to listen 
    watcher = new ManagementEventWatcher(scope, queryString); 
    watcher.EventArrived += 
      new EventArrivedEventHandler(this.OnEventArrived); 
    watcher.Start();