Update Upload Process Details in TextBox Along with Upload in WPF

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In my WPF window, I am uploading a large Excel file to internal database. I want to show the update process like which sheet it is reading etc in the text box below.

  • I tried writing text in text box/ updating label content but it just holds in freeze till operation is over. For both textbox and label only first item gets updated and holds still till last item.
  • I tried using another thread but since wpf runs on single thread, it doesnt allow the new thread to take control of wpf window items

Any suggestions ?

enter image description here

wpf .net c#
1 Answers

You should NEVER use the UI thread for other things, if you want to program good software! Things like uploading, you put in a thread or in a task, which of course has NO access to the UI elements, but there is a dispatcher for that.

private void CopyTask()
{
     Task.Run(() =>
     {
          //here comes in your task that takes a long time. 
          //But you can still move your window in the time.
          UpdateText("10$");
          Thread.Sleep(1000);
          UpdateText("20$");
          Thread.Sleep(1000);
          UpdateText("50$");
          Thread.Sleep(1000);
          UpdateText("100$");
          Thread.Sleep(1000);
     });
}


private void UpdateText(string Value)
{
     //checks if it has access, if not then it goes through the dispatcher,
     //which can call the method with the necessary rights
     if (!Txtbox.CheckAccess())
          Txtbox.Dispatcher.BeginInvoke(DispatcherPriority.Normal, () =>
          {
               UpdateText(Value);
          });
          else
               Txtbox.Text = Value;
}

But I would recommend you to learn first what WPF, Threads and Dispatcher are.

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