Smart way to deal with TextBox OnChange Event

Question

I'm looking for a best way to deal with text that moves from right to left.

So, I have this working code:

// write text for simulation view
File.WriteAllText("text1.txt", textBox1.Text, Encoding.UTF8);   
// delete temporary processed video with overlayed text
ProcessFileOperations.deleteFile("text1.avi");

ProcessFileOperations.overlayText(text1ColorButton.BackColor.Name, filePath, 0);
mediaPlayer.URL = "text1.avi";
mediaPlayer.Ctlcontrols.play();

This creates a video with overlayed scrolling text and instantly plays it as simulation. The problem arrives when I write text it fast windowmediaplayer is "going down" for a while - black image. How can let to user to put text and update media files with some delay or pause NOT to "freeze" main thread?

Yeap, but the idea is to show simulation. It's for LED control software — Elmatsidis Paul, Mar 29 '17 at 12:33

score 1 · Answer 1 · answered Mar 29 '17 at 12:34

1

this makes the changes run another thread and once completed media player runs with new file

await Task.Run(()=>{
  // write text for simulation view
    File.WriteAllText("text1.txt", textBox1.Text, Encoding.UTF8);   
    // delete temporary processed video with overlayed text
    ProcessFileOperations.deleteFile("text1.avi");


ProcessFileOperations.overlayText(text1ColorButton.BackColor.Name, filePath, 0);
});

mediaPlayer.URL = "text1.avi";
mediaPlayer.Ctlcontrols.play();

answered Mar 29 '17 at 12:34

Krishna

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I use .NET 4. I got the error: The 'await' operator can only be used within an async method. Consider marking this method with the 'async' modifier and changing its return type to 'Task'. Galaxy G2D C:\Users\Power User\Desktop\290317-chroma-work\C_Sharp_Demo\Form1.cs – Elmatsidis Paul Mar 29 '17 at 12:37
@PaulElmatsidis check this http://stackoverflow.com/questions/9110472/using-async-await-on-net-4 – Krishna Mar 29 '17 at 12:49
@PaulElmatsidis or you can use normal threading to run that process asynchronously – Krishna Mar 29 '17 at 12:50

Smart way to deal with TextBox OnChange Event

1 Answers1