Question Clearing a drawn panel

[Mamta]

how to clear lines drawn on a panel.on some event i want to clear lines which r previosly drawn

 

[JohnH]

Use panel.Refresh method to have the whole control invalidated and repainted. At this point you then don't draw those lines from the controls Paint event handler like you did before.

 

[Mamta]

Thanks John.Here I m not drawing lines in the paint event of panel.m drawing the lines on mousemove event of panel.after this m saving the image and all drawing parameters n now i want to refresh the panel by deleting all previosly drawn lines.On a new menu click i want to redraw new lines to have a new image 2 be saved.so my problem vl nt b solved by calling paint again

 

[JohnH]

Any time a control redraws everything is drawn starting from nothing, so refreshing the control will also reset anything you have drawn to a 'hijacked' device context.
You should not draw to a control outside the paint event handler, because whenever the controls repaints what you put there will be lost, without you being able to maintain it.