怎么将输入文本框的邮箱地址转变成图片

建一页面eimg.aspx：page_load内:string emailstr = Request.QueryString["email"];System.Drawing.Bitmap image = new System.Drawing.Bitmap(50, 18);//图片宽高,根据邮箱地址长高设        Graphics g = Graphics.FromImage(image);        try        {            //清空图片背景色            g.Clear(Color.White);            Font font = new System.Drawing.Font("宋体", 10, FontStyle.Regular);            System.Drawing.Drawing2D.LinearGradientBrush brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height), Color.FromArgb(0x78FE8A3F), Color.FromArgb(0x78FE8A3F), 1.2f, true);            g.DrawString(emailstr, font, brush, 5, 2);            //画图片的边框线            g.DrawRectangle(new Pen(Color.FromArgb(0x78FE6903)), 0, 0, image.Width - 1, image.Height - 1);            System.IO.MemoryStream ms = new System.IO.MemoryStream();            image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);            Response.ClearContent();            Response.ContentType = "image/Gif";            Response.BinaryWrite(ms.ToArray());        }        finally        {            g.Dispose();            image.Dispose();        }调用：<img src="eimg.aspx?email=...">
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C# code
            System.IO.MemoryStream ms = new System.IO.MemoryStream();            image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);            Response.ClearContent();            Response.ContentType = "image/Gif";            Response.BinaryWrite(ms.ToArray());不要了=============> image.Save("filepath..");//保存到文件