如何从richtextbox获取像素颜色

问题描述

on richTextBox（bachground color black and white forground）我写了一封来自richTextBox的字母y

我希望得到矩形尺寸为64X64像素的颜色。

问题，因为你可能会讨论我无法从richTextBox获取位图

见A行



我尝试过：

on richTextBox(bachground color black and white forground) i wrote letter y
from the richTextBox i want to get the color of the rectangle size 64X64 pixels.
the problem as you may gussed i could not get a bitmap from the richTextBox
see line A

What I have tried:

Color[,] pixelColor = new Color[100, 100];
//objMyBitMap = new Bitmap(640, //480,System.Drawing.Imaging.PixelFormat.Format24bppRgb);

            Bitmap rtb = (Bitmap)richTextBox1.Clone();//<-------  Line A
            for (i = 1; i < 64+1; i++)
            {
                for (j = 1; j < 64+1; j++)
                {
                    //pixelColor[i,j] = objMyBitMap.GetPixel(i, j);
                    pixelColor[i,j] = rtb.GetPixel(i, j);
                }
            }

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