C＃定期從不同的線程返回值

Question

我對多線程很陌生，缺乏經驗。我需要在不同的線程中計算一些數據，以便UI不會掛起，然後在處理數據時將它們發送到主表單上的表格。因此，基本上，用戶可以使用已經計算的數據，而其他數據仍在處理中。達到此目的的最佳方法是什麼？我也非常感謝任何例子。提前致謝。

Answer 1

如果你不想使用後臺工作由KMan作爲回答，你可以自己創建一個線程。

private void startJob(object work) { 
    Thread t = new Thread(
     new System.Threading.ParameterizedThreadStart(methodToCall) 
    ); 
    t.IsBackground = true; // if you set this, it will exit if all main threads exit. 
    t.Start(work); // this launches the methodToCall in its own thread. 
} 

private void methodToCall(object work) { 
    // do the stuff you want to do 
    updateGUI(result); 
} 

private void updateGUI(object result) { 
    if (InvokeRequired) { 
     // C# doesn't like cross thread GUI operations, so queue it to the GUI thread 
     Invoke(new Action<object>(updateGUI), result); 
     return; 
    } 
    // now we are "back" in the GUI operational thread. 
    // update any controls you like. 
} 

Answer 2

結帳此BackgroundWorker sample document。

Answer 3

您可以將數據發送到靜態變量，靜態變量在線程之間共享。

Answer 4

初始化您的後臺工作對象

BackgroundWorker bw = new BackgroundWorker(); 
bw.DoWork += new DoWorkEventHandler(bw_DoWork); 
bw.ProgressChanged += new ProgressChangedEventHandler(bw_ProgressChanged); 

private void bw_DoWork(object sender, DoWorkEventArgs e) 
{ 
    // I need to compute some data in a different thread so the UI doesn't hang up 
    // Well! ompute some data here. 
    bw.ReportProgress(percentOfCompletion, yourData) // and then send the data as it is processed 
    // percentOfCompletion-int, yourData-object(ie, you can send anything. it will be boxed) 
} 

private void bw_ProgressChanged(object sender, ProgressChangedEventArgs e) 
{ 
    // to a table on the main form. So, basically, the user can work with the data that is already computed, while other data is still being processed 
    List<string> yourData = e.UserState as List<string>; // just for eg i've used a List. 
} 

什麼是實現這一目標的最佳途徑？

RunWorkerAsync(); //This will trigger the DoWork() method 

Answer 5

使用註冊表項添加到線程