Why does text drawn on a panel disappear?

Question

I\'m trying to draw a text on a panel(The panel has a background picture).

It works brilliant,but when I minimize and then maximize the application the text is gone.

Answer 1

When you draw something, it only remains until the next time the form is refreshed.

When the form is refreshed, the Paint event is called. So if you want to ensure your text doesn't disappear, you need to include the code that draws it in the Paint event.

You can trigger a repaint using Control.Invalidate, but you otherwise cannot predict when they will happen.