好的，假设您想在C＃中的图像上绘制字符串，则需要在此处使用System.Drawing命名空间：
private Image DrawText(String text, Font font, Color textColor, Color backColor){ //first, create a dummy bitmap just to get a graphics object Image img = new Bitmap(1, 1); Graphics drawing = Graphics.FromImage(img); //measure the string to see how big the image needs to be SizeF textSize = drawing.MeasureString(text, font); //free up the dummy image and old graphics object img.Dispose(); drawing.Dispose(); //create a new image of the right size img = new Bitmap((int) textSize.Width, (int)textSize.Height); drawing = Graphics.FromImage(img); //paint the background drawing.Clear(backColor); //create a brush for the text Brush textBrush = new SolidBrush(textColor); drawing.DrawString(text, font, textBrush, 0, 0); drawing.Save(); textBrush.Dispose(); drawing.Dispose(); return img;}此代码将首先测量字符串，然后创建正确大小的图像。
如果要保存此函数的返回，只需调用返回图像的Save方法。
