Issue with dynamic image saved in the database

[ioanabratu]

I'm drawing dynamically on a bitmap.I want to be able to save the bitmap in the database as a JPG. I am using the following code to draw and get the bytes for the database. The image saved in the databse is always black, the bytes look the same even I am drawing different lines. What I am doing wrong? I try adding mIns.Flush(), and it is still not working.

Bitmap bmp = new Bitmap(328, 152);
Graphics g = Graphics.FromImage(bmp);
SolidBrush solidBrush;
Pen pen;
solidBrush = new SolidBrush(Color.Black);
pen = new Pen(solidBrush);
int oldx = 0;
int oldy = 0;
g.DrawLine(pen, oldx, oldy, 100, 100);
solidBrush.Dispose();
pen.Dispose();
MemoryStream mIns = new MemoryStream();
bmp.Save(mIns, System.Drawing.Imaging.ImageFormat.Jpeg);
ret = new Byte[mIns.Length];
mIns.Position = 0;
mIns.Read(ret, 0, (int)mIns.Length);
 

Thanks,
Ioana

[ioanabratu]

Forget about it. I was drawing with a black pen on a black surface.:o))

[kenobewan]

Thanks for sharing the solution :).