c# - richTextBox.DrawToBitmap Does Not Draw Containing Text?

Question

If I have a richTextBox and run DrawToBitmap on it, it doesn't draw any of the text inside of the richTextBox.

Bitmap b = new Bitmap(rtb.Width, rtb.Height);
inputControl.DrawToBitmap(b, new Rectangle(0, 0, b.Width, b.Height));

Is there any way to fix this?

Answer 1

I know this is relatively old, but a working solution that I found at http://www.windows-tech.info/3/8ffaf21eed5de2d4.php:

public static Bitmap RtbToBitmap(RichTextBox rtb)
{
    rtb.Update(); // Ensure RTB fully painted
    Bitmap bmp = new Bitmap(rtb.Width, rtb.Height);
    using (Graphics gr = Graphics.FromImage(bmp))
    {
        gr.CopyFromScreen(rtb.PointToScreen(Point.Empty), Point.Empty, rtb.Size);
    }
    return bmp;
}