C#合成文字图片

C#利用Bitmap和Graphics合成文字图片，新建窗体，在窗体中添加一个button，button中代码如下

private void button1_Click(object sender, EventArgs e)
        {
            string  text = "江湖渐远";//预设要合成的字符串
            Bitmap  bmp = new Bitmap(500, 300);//设置图片大小
            Graphics  g =Graphics .FromImage(bmp);//封装一个GDI+绘图图画
            Random r = new Random();//产生随机数获取随机颜色
            g.Clear (Color .White );//设置背景色为白色
            for (int j = 0; j < 4; j++)
            {
                string[] fonts = { "微软雅黑", "Viner Hand ITC", "Tempus Sans ITC", "汉仪长艺体简", "汉仪双线体简", "汉仪花蝶体简" };//预置字体列表
                Point p = new Point((j + 1) * 78, 60);//每个汉字的坐标
                Color[] colors = { Color.Red, Color.Green, Color.Black, Color.Yellow, Color.LightSkyBlue, Color.Blue };//预置颜色列表
                g.DrawString(text[j].ToString(), new Font(fonts[r.Next(fonts.Length)], 40, FontStyle.Bold), new SolidBrush(colors[r.Next(colors.Length)]), p);//画图
            }
            pictureBox1.Image = bmp;//在pictureBox中预览图片
            string path = Application.StartupPath + "/123.jpg"; //保存路径
            bmp .Save (path,System.Drawing.Imaging.ImageFormat.Png );//保存图片
            
        }