Set Print Page height programmatically?

[Duong Nguyen]

Hello,
I am trying to program to work with POS-Printer in page mode. So I want to
set the page height at run time. Depend on the number of lines to draw to
Canvas, I must set the Page height.
So I can get the height in pixel Height = LineCount *
font.GetHeight(GraphicsObject);
and set the page size:
prndoc.DefaultPageSettings.PaperSize = new
System.Drawing.Printing.PaperSize("custom", width, height);

width and height is in Hundredth of an inch.

So How can I convert from Height (in Pixel) to Height in hundredth of an
inch?

 

[Stoitcho Goutsev \(100\)]

Duong,

To calculate the size in pixels you need to have information regarding
pronter's DPI (resolution).

Here is an example how this can be calculated:

PrinterSettings ps = new PrinterSettings();
Graphics g = ps.CreateMeasurementGraphics();
MessageBox.Show(g.DpiX.ToString() + ", " + g.DpiY.ToString());

double width = 100 * widthInPixels / g.DpiX;
double height = 100 * heightInPixels / g.DpiY;

 

[Duong Nguyen]

Hi SG!
Thank you very much for the answer. I am now trying to do as you recommend.