Question
I would like to enhance the print functionality for GTP. I’d like the productvery much , only the print functionality is a bit poor.
My question is how to obtain the image that is been posed on the printpreview. When a print preview is genarated I can only find information about the graphics object but not the image:
System.Void PrintPage ( System.Drawing.Graphics G, System.Drawing.Rectangle Margins, System.Int32 aGridWidth, System.Int32 aDateScalerHeight, System.Boolean& HasMorePages)
I noticed that there are images(bitmaps) for the grid and datescalar but I’m looking for one image object of the complete gtp (grid + datescalar). Can you please give me some information for my problem?
Answer
You can send in a graphics object that comes from a bitmap like this:
Bitmap b=new Bitmap(w,h);
Graphics g=Graphics.FromImage(b);
And the call PrintPage with that… You will then get the complete print in bitmap!
Sample code:
// Print to a bitmap file
Bitmap bm=new Bitmap(CapTimingGantt.Gantt.Width, CapTimingGantt.Gantt.Height);
Graphics g = Graphics.FromImage(bm);
g.FillRectangle(new SolidBrush(Color.Tomato), r);
g.DrawRectangle(Pens.Black, r);
bool hasMorePages = false;
Rectangle r = Rectangle.FromLTRB(0, 0, CapTimingGantt.Gantt.Width, CapTimingGantt.Gantt.Height);
CapTimingGantt.Gantt.PrintInit(null);
CapTimingGantt.Gantt.PrintPage(g, r, 150, 28, ref hasMorePages);
CapTimingGantt.Gantt.PrintEnd();
bm.Save("c:\\temp\\test2.bmp");To print to an EMF instead go like this:
// Print to emf, enhanced meta file, the windows vector format
Graphics g = CapTimingGantt.Gantt.CreateGraphics();
IntPtr pHdc = g.GetHdc();
Metafile mf = new Metafile("c:\\temp\\test2.emf", pHdc);
g.ReleaseHdc(pHdc);
g.Dispose();
g = Graphics.FromImage(mf);
bool hasMorePages = false;
Rectangle r = Rectangle.FromLTRB(0, 0, CapTimingGantt.Gantt.Width, CapTimingGantt.Gantt.Height);
g.FillRectangle(new SolidBrush(Color.Tomato),r);
g.DrawRectangle(Pens.Black, r);
CapTimingGantt.Gantt.PrintInit(null);
CapTimingGantt.Gantt.PrintPage(g, r, 150, 28, ref hasMorePages);
CapTimingGantt.Gantt.PrintEnd();
g.Dispose();
We also get questions on how to print a bitmap that is larger than what is on screen.
And this is ofcourse totally analouge, just create a larger bitmap and a larger rectangle...
// Print to a bitmap file
Bitmap bm = new Bitmap(gantt1.Width*10, gantt1.Height*3);
Graphics g = Graphics.FromImage(bm);
Rectangle r = Rectangle.FromLTRB(0, 0, gantt1.Width * 10, gantt1.Height * 3);
bool hasMorePages = false;
gantt1.PrintInit(null);
gantt1.PrintPage(g, r, 150, 28, ref hasMorePages);
gantt1.PrintEnd();
bm.Save("c:\\temp\\test2.bmp");
pictureBoxImageMaps.Image = bm;
Further note: When printing from a webpage and you use collisiondetection the print sequence should look like this: Gantt_ASP1.Gantt.TurnOffAllCollisionDetect=false; <--- ADD THIS< ?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
Gantt_ASP1.Gantt.PrintInit(null);
Gantt_ASP1.Gantt.PrintPage(g, r, 150, 28, ref hasMorePages);
Gantt_ASP1.Gantt.PrintEnd();