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Drawing line in pictureBox
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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
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
Because you need to paint it there each time the picture is painted most likely
Did I just hear "You gotta help us, Doc. We've tried nothin' and we're all out of ideas" ? Is this you? Dont let this be you! I will put in as much effort as you seem to.
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.
failing that, do a search for captureing from a paintbox/form and saving it as a bmp, so you update the bmp in memory.
Did I just hear "You gotta help us, Doc. We've tried nothin' and we're all out of ideas" ? Is this you? Dont let this be you! I will put in as much effort as you seem to.
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.
Another question, do You have any idea how could I drag the image inside pictureBox instead of using scrollbars.
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
Did I just hear "You gotta help us, Doc. We've tried nothin' and we're all out of ideas" ? Is this you? Dont let this be you! I will put in as much effort as you seem to.
Won't the drag and drop method for control work in WM?
.Net Developer - 3D Game Designer
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