在MSSQL中，图片字段类型是IMAGE，但是在MYSQL中不存在IMAGE，而有的提到是用BOLB类型保存，我建议是用LONGBOLB,因为在图片稍微较大时，用BOLB保存的图片只能显示半节。下面是具体的代码
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 int len = FileUpload1.PostedFile.ContentLength;
        byte[] pic = new byte[len];
        FileUpload1.PostedFile.InputStream.Read(pic, 0, len);
        string strImageType = FileUpload1.PostedFile.ContentType;
        MySqlConnection connection = DAL.DBHelp.Conn();
        // SqlConnection connection = new
        //SqlConnection(@"server=ALLEN\SQLEXPRESS;Initial Catalog=GibbsCAMCert;Integrated Security=True");
        try
        {
            //  connection.Open();
            //   SqlCommand cmd = new SqlCommand("insert into photo "
            ///     + "(photo, type) values (@pic, @text)", connection);        
            string sql = "update tbl_resume set c_photo=?c_photo where c_uid='aaa111'";//, connection
            MySqlCommand cmd = new MySqlCommand();
            cmd.Connection = connection;
            cmd.CommandText = sql;
            cmd.CommandType = CommandType.Text;
            cmd.Parameters.AddWithValue("?c_photo", pic);//.Paramters.AddWithValue();
            string ss = cmd.CommandText;
            cmd.ExecuteNonQuery();
            //cmd.Parameters.Add("@pic", pic);
            //cmd.Parameters.Add("@text", strImageType);
            //cmd.ExecuteNonQuery();
        }
        finally
        {
            connection.Close();
        }
注：如果是测试直接用
   MySqlCommand cmd = new MySqlCommand("update tbl_resume set c_photo='"+pic+"' where c_uid='aaa111'",connection);这样存在数据库的大小会比图片实际字节小，读取的时候会显示不了（呵呵，具体哪出错了还没来的急研究，但我在调试的时候就因为这样郁闷了很久）
 显示代码
 MemoryStream stream = new MemoryStream();
        //  SqlConnection connection = new SqlConnection(@"server=ALLEN\SQLEXPRESS;Initial Catalog=GibbsCAMCert;Integrated Security=True");
        MySqlConnection connection = DAL.DBHelp.Conn();
        try
        {
            //connection.Open();
            //  SqlCommand command = new SqlCommand("select photo from photo", connection);

MySqlCommand command = new MySqlCommand("select c_photo from tbl_resume where c_uid='aaa111'", connection);
            byte[] image = (byte[])command.ExecuteScalar();
            stream.Write(image, 0, image.Length);
            Bitmap bitmap = new Bitmap(stream);
            Response.ContentType = "image/gif";
            bitmap.Save(Response.OutputStream, ImageFormat.Gif);
        }
        finally
        {
            connection.Close();
            stream.Close();
        }