Print Dialog problem?

Question

I have been trying use the print dialog on my winforms app to suppress color and it doesn't not work. I have included print snippet code below. Could someone please steer me in the right direction.

 private void buttonPrintPage_Click(object sender, EventArgs e)
        {
            PrintDocument printDocument1 = new PrintDocument();
            var pDialog = new PrintDialog();
            printDocument1.DocumentName = "Document Name";
            pDialog.Document = printDocument1;
            pDialog.AllowSelection = true;
            pDialog.AllowSomePages = true;
            pDialog.PrinterSettings.DefaultPageSettings.Color = false;
            pDialog.PrinterSettings.DefaultPageSettings.Landscape = true;
            HideProgressBars();
            CaptureScreen();
            if (pDialog.ShowDialog() == DialogResult.OK)
            {
                printDocument1.PrinterSettings = pDialog.PrinterSettings;
                printDocument1.PrintPage += new PrintPageEventHandler
                       (this.printDocument1_PrintPage);
                printDocument1.Print();
            }
        }

        private void CaptureScreen()
        {
            Graphics mygraphics = this.CreateGraphics();
            Size s = this.Size;
            memoryImage = new Bitmap(s.Width, s.Height, mygraphics);
            Graphics memoryGraphics = Graphics.FromImage(memoryImage);
            IntPtr dc1 = mygraphics.GetHdc();
            IntPtr dc2 = memoryGraphics.GetHdc();
            BitBlt(dc2, 0, 0, this.ClientRectangle.Width, this.ClientRectangle.Height, dc1, 0, 0, 13369376);
            mygraphics.ReleaseHdc(dc1);
            memoryGraphics.ReleaseHdc(dc2);
        }

        private void printDocument1_PrintPage(System.Object sender, System.Drawing.Printing.PrintPageEventArgs e)
        {
            try
            {
                PrintDocument document = (PrintDocument)sender;
                e.PageSettings.PrinterSettings = document.PrinterSettings;
                e.Graphics.DrawImage(memoryImage, 0, 0);
            }
            catch (InvalidPrinterException)
            {

            }


        }

Answer 1

Hi, 

Do you mean print not in color? msdn document says setting value PageSettings.Color = false will do this, 

http://msdn.microsoft.com/en-us/library/system.drawing.printing.pagesettings.color.aspx

Does this helps you?

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Answer 2

When presented with the  print dialog properties, I change the property from printing in color to print in Gray scale, the result of the printed output is still in color. Am I missing something?

Answer 3

Hi,

It seems that PageSettings.Color = false does not work in this case.   Here is a similar thread, http://social.msdn.microsoft.com/Forums/en-US/vbgeneral/thread/a47e3765-660f-4d31-b871-8af54bbc82cf/  

Besides the workaround mentioned in the above thread, we can also consider converting the image into black & white

public Bitmap MakeGrayscale3(Bitmap original)
        {
            //create a blank bitmap the same size as original
            Bitmap newBitmap = new Bitmap(original.Width, original.Height);

            //get a graphics object from the new image
            Graphics g = Graphics.FromImage(newBitmap);

            //create the grayscale ColorMatrix
            ColorMatrix colorMatrix = new ColorMatrix(
               new float[][]
      {
         new float[] {.3f, .3f, .3f, 0, 0},
         new float[] {.59f, .59f, .59f, 0, 0},
         new float[] {.11f, .11f, .11f, 0, 0},
         new float[] {0, 0, 0, 1, 0},
         new float[] {0, 0, 0, 0, 1}
      });

            //create some image attributes
            ImageAttributes attributes = new ImageAttributes();

            //set the color matrix attribute
            attributes.SetColorMatrix(colorMatrix);

            //draw the original image on the new image
            //using the grayscale color matrix
            g.DrawImage(original, new Rectangle(0, 0, original.Width, original.Height),
               0, 0, original.Width, original.Height, GraphicsUnit.Pixel, attributes);

            //dispose the Graphics object
            g.Dispose();
            return newBitmap;
        }

private void printDocument1_PrintPage(object sender, PrintPageEventArgs e)
        {
            try
            {
                memoryImage = MakeGrayscale3(memoryImage);
                PrintDocument document = (PrintDocument)sender;
                e.PageSettings.PrinterSettings = document.PrinterSettings;
                e.Graphics.DrawImage(memoryImage, 0, 0);
            }
            catch (InvalidPrinterException)
            {

            }

        }

The method I used to convert the image refers to this blog, http://notes.ericwillis.com/2009/11/make-an-image-black-and-white-in-csharp/

Good day!

Thanks

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Michael Sun [MSFT]
MSDN Community Support | Feedback to us

Answer 4

Thank you, this solution worked well.

Answer 5

You're welcome!  :)

Have a nice weekend!

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Michael Sun [MSFT]
MSDN Community Support | Feedback to us