如何从线程中绘制，但是更聪明？

Question

    private void DisplayThread()
    {
        while (RunDisplayThread)
        {
            Thread.Sleep(30);
            MPLastMessage.Text = MPTemplate.MPRET[(int)MP.MPReturn];
            Invoked();
            TickCount++;
            TickCountLabel.Text = string.Format("Tick Count: {0}", TickCount);
        }
    }

    private void Invoked()
    {
        while (MP.Drawing) { };
        g.DrawImage(MP.offscreen, 50, this.Height-300);
    }

So, this works, but after reading this,

Draw image on a form from a separate thread

I am clearly doing this in a less-than-intelligent way. Can anyone explain what the difference is between the suggested answer and what I'm doing? I've been teaching myself C#, and I'm at a loss for how that answer works.

Answer 1

Although the link you provided is named "draw (...) from a separate thread", the drawing itself still happens on the Gui thread, using Control.Invoke() ( http://msdn.microsoft.com/en-us/library/zyzhdc6b.aspx ).

Your Invoked() method runs on the "DisplayThread". I don't know where the g variable comes from though, is this a class variable set in the OnPaint method? If so chances are the DrawImage would fail if it would take more time than the code in OnPaint .