C# sql 实现图片批量储存读取

 winform下：
         //存储
        private void MemoryImage()
        {
            string sql = "";
            //string conn = "Provider=SQLNCLI;Data Source=192.168.0.9,1433;Database=WebDown;UID=sa;PWD=111122;";
            Stream ms;
            byte[] picbyte;
            OpenFileDialog ofdSelectPic = new OpenFileDialog();
            if (ofdSelectPic.ShowDialog() == DialogResult.OK)
            {
                if ((ms = ofdSelectPic.OpenFile()) != null)
                {
                    picbyte = new byte[ms.Length];
                    ms.Position = 0;
                    ms.Read(picbyte, 0, Convert.ToInt32(ms.Length));
                    //连接数据库
                    SqlConnection conn = new SqlConnection();
                    conn