Print High Resolution Image in C#

Question

I am printing image 2349 x 3600 pixels. I have resized image but printing is blurred not clean. Please looke at code -

using System.Drawing.Drawing2D;

public Bitmap resizeimage(Bitmap bitmap)
{
    Bitmap result = new Bitmap(850, 1101);
    using (Graphics grap = Graphics.FromImage(result))
    {            
        grap.CompositingQuality = CompositingQuality.HighQuality;
        grap.InterpolationMode  = InterpolationMode.Bicubic;
        grap.SmoothingMode      = SmoothingMode.HighQuality;
        grap.CompositingQuality = CompositingQuality.HighQuality;
           
        grap.DrawImage(bitmap, 0, 0, 850, 1101);
    }
    return result;
}

I tried everything from changing bitmap size, quality of graphics but still image blurred. I used microsoft office 2007 and resized image and printed it , it was so clear. How I can get exact printing quality as I got in microsoft office 2007. Please help.

Here is code before drawing -

PrintPreviewDialog printpreview = new PrintPreviewDialog();

PrintDocument printdocument = new PrintDocument();

printdocument.PrinterSettings.PrinterName = "EPSON L100 Series";
int horizantal_dpi = printdocument.PrinterSettings.DefaultPageSettings.PrinterResolution.X;
int vertical_dpi   = printdocument.PrinterSettings.DefaultPageSettings.PrinterResolution.Y;

decimal final_width_dpi  = (((int)printdocument.DefaultPageSettings.PrintableArea.Width  * horizantal_dpi) / 100);
decimal final_height_dpi = (((int)printdocument.DefaultPageSettings.PrintableArea.Height * vertical_dpi  ) / 100);

printimagaprint = new Bitmap((int)final_width_dpi, (int)final_height_dpi);

//set resoultion
printimagaprint.SetResolution(horizantal_dpi, vertical_dpi);

Graphics g = System.Drawing.Graphics.FromImage(printimagaprint);
g.DrawImage(bitmap, 0, 0, printimagaprint.Width, printimagaprint.Height);

printdocument.PrintPage +=new PrintPageEventHandler(printdocument_PrintPage);

//printdocument.Print();
printdocument.DocumentName = textBox1.Text;
printpreview.Document = printdocument;
printpreview.ShowDialog();

Answer 1

Try matching the printer resolution before printing.

printDialog.PrinterSettings.PrinterName = GetTargetPrinter(); 

int horizontal_dpi = printDialog.PrinterSettings.DefaultPageSettings.PrinterResolution.X;
int vertical_dpi = printDialog.PrinterSettings.DefaultPageSettings.PrinterResolution.Y;
Decimal final_width_dpi = (((int)printDialog.PrinterSettings.DefaultPageSettings.PrintableArea.Width * horizontal_dpi) / 100); 
Decimal final_height_dpi = (((int)printDialog.PrinterSettings.DefaultPageSettings.PrintableArea.Height * vertical_dpi) / 100);

printImage = new Bitmap((int)final_width_dpi, (int)final_height_dpi);

// Set Resolution
printImage.SetResolution(horizontal_dpi, vertical_dpi);

Graphics g = System.Drawing.Graphics.FromImage(printImage);

And please try to provide more descriptive code. I am just making assumption for now.