如何在运行时动态地从文本生成图像

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。