Question

I have an application where the user can print a document of selected items in the form of an invoice. Everything works well however on the PrintPage event of the PrintDocument I want to capture the document or he graphics, turn it into a bitmap so I can save to it a .bmp for later use / viewing. (Note: There are multiple pages in this document) I have it set up like this:

PrintDocument doc = new PrintDocument();
doc.PrintPage += new PrintPageEventHandler(doc_PrintPage);
doc.Print();

Then on the PrintPage event:

private void doc_PrintPage(object sender, PrintPageEventArgs ev)
{
    // Use ev.Graphics to create the document
    // I create the document here

    // After I have drawn all the graphics I want to get it and turn it into a bitmap and save it.
}

I have cut out all the ev.Graphics code just because it is a lot of lines. Is there a way to turn the Graphics into a Bitmap without changing any of the code that draws graphics onto the PrintDocument? Or do something similar to that, maybe copying the document and converting it into a bitmap?

Answer 1

You should actually draw the page into the bitmap, and then use ev.Graphics to draw that bitmap on the page.

private void doc_PrintPage(object sender, PrintPageEventArgs ev)
{
    var bitmap = new Bitmap((int)graphics.ClipBounds.Width,
                            (int)graphics.ClipBounds.Height);

    using (var g = Graphics.FromImage(bitmap))
    {
        // Draw all the graphics using into g (into the bitmap)
        g.DrawLine(Pens.Black, 0, 0, 100, 100);
    }

    // And maybe some control drawing if you want...?
    this.label1.DrawToBitmap(bitmap, this.label1.Bounds);

    ev.Graphics.DrawImage(bitmap, 0, 0);
}