Drawing line in pictureBox
 

Hi,

I have picture box with some image int it. I want to draw a line on the image. But when code executes, line is there but image is gone.
Here is the code:

bitmap bmp=new bitmap(pb.width,pb.height);
graphics g=new graphics.fromImage(bmp);
pen p=new pen(color.black,5);
g.drawLine(p,0,0,10,10);

Line is there, but underlaying image is gone. What should I do?

Pete

Re: Drawing line in pictureBox
 

Because you need to paint it there each time the picture is painted most likely

Re: Drawing line in pictureBox
 

I'm working on application for WinMobile and there isn't OnPaint method there...

Re: Drawing line in pictureBox
 

http://msdn.microsoft.com/en-us/libr...l.onpaint.aspx says there should be.

failing that, do a search for captureing from a paintbox/form and saving it as a bmp, so you update the bmp in memory.

Re: Drawing line in pictureBox
 

Thanks, I have sorted it out.
Another question, do You have any idea how could I drag the image inside pictureBox instead of using scrollbars.

Re: Drawing line in pictureBox
 

this was covered in another thread - you need to store the picture in memory, and then copy and show only in the picture box what the user is expecting to see

Re: Drawing line in pictureBox
 

Do You have some example code, plz

Hello,
Please tell me the some references about c#.

Re: Drawing line in pictureBox
 

Won't the drag and drop method for control work in WM?