insert image into sql table from any folder without using file upload

protected void Page_Load(object sender, EventArgs e)
        {

        }
        static public byte[] GetBytesFromUrl(string url)
        {
            byte[] b;
            HttpWebRequest myReq = (HttpWebRequest)WebRequest.Create(url);
            WebResponse myResp = myReq.GetResponse();

            Stream stream = myResp.GetResponseStream();
            //int i; 
            using (BinaryReader br = new BinaryReader(stream))
            {
                //i = (int)(stream.Length); 
                b = br.ReadBytes(500000);
                br.Close();
            }
            myResp.Close();
            return b;
        }

        static public void WriteBytesToFile(string fileName, byte[] content)
        {
            FileStream fs = new FileStream(fileName, FileMode.Create);
            BinaryWriter w = new BinaryWriter(fs);
            try
            {
                w.Write(content);
            }
            finally
            {
                fs.Close();
                w.Close();
            }

        }

        protected void btn_Upload_Click(object sender, EventArgs e)
        {
            try
            {
                DataSet dsxml = new DataSet();
                dsxml.ReadXml("C:\\Documents and Settings\\madhyam1\\Desktop\\Property XML\\propertyfeedHomecouk.xml");

                string d = ConfigurationManager.AppSettings["ConnectionString"] + "";

                SqlConnection sqlcon = new SqlConnection(d);
                sqlcon.Open();

                for (int i = 0; i <= dsxml.Tables[0].Rows.Count; i++)
                //for (int i = 0; i <= 10; i++)
                {
                    string url = dsxml.Tables[0].Rows[i][6].ToString();
                    if (!string.IsNullOrEmpty(url))
                    {
                        string DestinationPath = "C:/Temp";
                        string filename = url.Substring(url.LastIndexOf('/') + 1);
                        byte[] bytes = GetBytesFromUrl(url);

                        WriteBytesToFile(DestinationPath + "/" + i + ".jpg", bytes);
                        SqlCommand cmd = new SqlCommand(@"INSERT INTO Property_details
                        (price
                        ,bedrooms
                        ,type
                        ,location
                        ,postcode
                        ,url
                        ,thumbnail_url
                        ,agent_id
                        ,agent_url
                        ,lat
                        ,long
                        ,developmentid
                        ,description
                        ,CustomerId
                        ) VALUES('" + dsxml.Tables[0].Rows[i][0] + "','" + dsxml.Tables[0].Rows[i][1] + "','" + dsxml.Tables[0].Rows[i][2] + "','" + dsxml.Tables[0].Rows[i][3] + "','" + dsxml.Tables[0].Rows[i][4] + "','" + dsxml.Tables[0].Rows[i][5] + "','" + dsxml.Tables[0].Rows[i][6] + "','" + dsxml.Tables[0].Rows[i][7] + "','" + dsxml.Tables[0].Rows[i][8] + "','" + dsxml.Tables[0].Rows[i][9] + "','" + dsxml.Tables[0].Rows[i][10] + "','" + dsxml.Tables[0].Rows[i][11] + "','" + dsxml.Tables[0].Rows[i][12].ToString().Replace("'", ".") + "',0)", sqlcon);

                        cmd.ExecuteNonQuery();

                    }



                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }