Why report is shrunk When RDLC Report is printed directly to POS printer

Question

i am trying to print an RDLC Report Directly to a POS Printer, using source code from MSDN (Link), by exporting the report to (EMF) Image, then printing the image to the printer using PrintDocument,I calculate the height of the report based on number of rows (height of one row = 0.6 cm).

The problem is that when the report is too long (more than one page), I got its rows shrunk (compressed) to each other.

How to solve this problem ? Do I have to use POS Printer library (.NET POS) instead of the exporting the report to image and printing the image? . you can download the source code from (Here).

thanks in advanced.

Answer 1

I solved it by changing the size of the paper :

PaperSize pkCustomSize = new System.Drawing.Printing.PaperSize("Custom Paper Size", Convert.ToInt32((WidthInInCM / 2.54) * 100), Convert.ToInt32((HeightInInCM / 2.54) * 100));
            printDoc.DefaultPageSettings.PaperSize = pkCustomSize;
            printDoc.DefaultPageSettings.Margins.Top = 0;
            printDoc.DefaultPageSettings.Margins.Bottom = 0;
            printDoc.DefaultPageSettings.Margins.Left = 0;
            printDoc.DefaultPageSettings.Margins.Right = 0;

            if (!printDoc.PrinterSettings.IsValid)
            {
                String msg = String.Format("Can't find printer \"{0}\".", PrinterName);
                MessageBox.Show(msg, "Print Error");
                return;
            }
            printDoc.PrinterSettings.DefaultPageSettings.PaperSize = printDoc.DefaultPageSettings.PaperSize;
            printDoc.PrinterSettings.DefaultPageSettings.Margins = printDoc.DefaultPageSettings.Margins;

you can download the updated source code from (here).

Answer 2

another solution is to print the large image (which I export the report to it) to many pages :

private void PrintPage(Object sender, PrintPageEventArgs ev)
        {
            if (pageImage == null)
                return;
            ev.Graphics.PageUnit = GraphicsUnit.Pixel;

            ev.Graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
            ev.Graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
            float a = (ev.PageSettings.PrintableArea.Width / 100) * ev.Graphics.DpiX;
            float b = ((ev.PageSettings.PrintableArea.Height / 100) * ev.Graphics.DpiY);
            float scale = 1500;
            scale = 0;
            RectangleF srcRect = new RectangleF(0, startY, pageImage.Width, b - scale);
            RectangleF destRect = new RectangleF(0, 0, a, b);
            ev.Graphics.DrawImage(pageImage, destRect, srcRect, GraphicsUnit.Pixel);
            startY = startY + b - scale;
            float marignInPixel = (0.5f / 2.54f) * ev.Graphics.DpiY;
            ev.HasMorePages = (startY + marignInPixel < pageImage.Height);
        }

you can download the source code from (here)

Answer 3

I've been stuck on a similiar problem.

I've managed to fix it using the following:

    private void PrintPage(object sender, PrintPageEventArgs ev)
    {

        Metafile pageImage =
          new Metafile(m_streams[m_currentPageIndex]);
//That's the fix - Units set to Display
        ev.Graphics.PageUnit = GraphicsUnit.Display;
//Drawing it scaled
        ev.Graphics.DrawImage(pageImage, 0, 0, ev.MarginBounds.Width, ev.MarginBounds.Height);

        m_currentPageIndex++;
        ev.HasMorePages = (m_currentPageIndex < m_streams.Count);            
    }

The page gets drawn to printer canvas scaled.