初始化DataGrid中每個按鈕的計時器點擊

Question

我想單擊特定數據網格行上的按鈕時初始化計時器。

例如：我有多行播放按鈕，按下時我想在該特定行上啓動一個計時器只有並且在暫停時我只想暫停一個計時器。

到目前爲止，這裏是C＃代碼。

private void OnPlayButtonClicked(object sender, RoutedEventArgs e) 
{ 
    var selectedProject = ((FrameworkElement) sender).DataContext as Project; 

    if (selectedProject != null) 
    { 
     Console.WriteLine("Selected Project has been played: " + 
      selectedProject.ProjectName + " : Billed Hours - " + 
      selectedProject.ActualBilledHours); 

     if (ProjectDictionary.ContainsKey(selectedProject)) 
     { 
      ProjectDictionary.Remove(selectedProject); 

      var toggle = IsPlaying = !IsPlaying; 
      ProjectDictionary.Add(selectedProject, toggle); 

      foreach(var dict in ProjectDictionary) 
      { 
       if (dict.Key == selectedProject) 
       { 
        if (toggle) 
         Timer.Start(); 
        else 
         Timer.Stop(); 
       } 
      } 
     } 
    } 
} 

Answer 1

您似乎在爲所有行使用全局計時器。你的問題有點不清楚，但是如果你想要每行有一個定時器，你可以例如在字典中存儲一個按照Project對象的定時器。類似這樣的：

private readonly Dictionary<Project, Timer> _timers = new Dictionary<Project, Timer>(); 
private void OnPlayButtonClicked(object sender, RoutedEventArgs e) 
{ 
    var selectedProject = ((FrameworkElement)sender).DataContext as Project; 

    if (selectedProject != null) 
    { 
     Console.WriteLine("Selected Project has been played: " + 
      selectedProject.ProjectName + " : Billed Hours - " + 
      selectedProject.ActualBilledHours); 

     if (ProjectDictionary.ContainsKey(selectedProject)) 
     { 
      ProjectDictionary.Remove(selectedProject); 

      var toggle = IsPlaying = !IsPlaying; 
      ProjectDictionary.Add(selectedProject, toggle); 

      foreach (var dict in ProjectDictionary) 
      { 
       if (dict.Key == selectedProject) 
       { 
        //get the timer from the dictionary 
        Timer timer; 
        if (!_timers.TryGetValue(selectedProject, out timer)) 
        { 
         timer = new Timer(); 
         _timers.Add(selectedProject, timer); 
        } 

        //start or stop 
        if (toggle) 
         timer.Start(); 
        else 
         timer.Stop(); 
       } 
      } 
     } 
    } 
}