Windows Phone Set selected customer edit and remove button in Listbox using Web server and mysql/php

<?php
  
	$objConnect = mysql_connect("localhost","root","");
	$objDB = mysql_select_db("mydatabase");
	
  if (isset($_GET["scustomerID"])) {
  
  $customer_id = $_GET['scustomerID'];
  
  $result = mysql_query("SELECT * FROM pim_productdeal where customer_id= $customer_id") or die(mysql_error());
  
	//$strSQL = "SELECT * FROM pim_productdeal WHERE customer_id = 1 ";

	$objQuery = mysql_query($result);
	$intNumField = mysql_num_fields($objQuery);
	$resultArray = array();
	while($obResult = mysql_fetch_array($objQuery))
	{
		$arrCol = array();
		for($i=0;$i<$intNumField;$i++)
		{
			$arrCol[mysql_field_name($objQuery,$i)] = $obResult[$i];
		}
		array_push($resultArray,$arrCol);
	}
	
	mysql_close($objConnect);
	
	echo json_encode($resultArray);
  }
?>

private void MainPage_Load(System.Object sender, System.Windows.RoutedEventArgs e)
        {
            string url = "http://localhost/myphp/getData.php";
            Uri uri = new Uri(url, UriKind.Absolute);

            StringBuilder postData = new StringBuilder();
            postData.AppendFormat("{0}={1}", "txtKeyword", HttpUtility.UrlEncode(this.txtKeyword.Text));

            WebClient client = default(WebClient);
            client = new WebClient();
            client.Headers[HttpRequestHeader.ContentType] = "application/x-www-form-urlencoded";
            client.Headers[HttpRequestHeader.ContentLength] = postData.Length.ToString();

            client.UploadStringCompleted += client_UploadStringCompleted;
            client.UploadProgressChanged += client_UploadProgressChanged;

            client.UploadStringAsync(uri, "POST", postData.ToString());

            prog = new ProgressIndicator();
            prog.IsIndeterminate = true;
            prog.IsVisible = true;
            prog.Text = "Loading....";
            SystemTray.SetProgressIndicator(this, prog);
        }

        private void client_UploadProgressChanged(object sender, UploadProgressChangedEventArgs e)
        {

        }

        private void client_UploadStringCompleted(object sender, UploadStringCompletedEventArgs e)
        {


            if (e.Cancelled == false && e.Error == null)
            {
                MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(e.Result));
                ObservableCollection<Customer> list = new ObservableCollection<Customer>();
                DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(ObservableCollection<Customer>));
                list = (ObservableCollection<Customer>)serializer.ReadObject(ms);

                List<Customer> myCustomer = new List<Customer>();

                foreach (Customer cm in list)
                {
                    string sCustomerID = cm.CustomerID.ToString();
                    string sName = cm.Name.ToString();
                    string sEmail = cm.Email.ToString();
                    string sCountryCode = cm.CountryCode.ToString();
                    string sBudget = cm.Budget.ToString();
                    string sUsed = cm.Used.ToString();

                    myCustomer.Add(new Customer(sCustomerID, sName, sEmail, sCountryCode, sBudget, sUsed));
                }

                this.CustomerList.ItemsSource = myCustomer;

                prog.IsVisible = false;

            }

        }

    }

    [DataContract]
    public class Customer
    {
        [DataMember]
        public string CustomerID { get; set; }

        [DataMember]
        public string Name { get; set; }

        [DataMember]
        public string Email { get; set; }

        [DataMember]
        public string CountryCode { get; set; }

        [DataMember]
        public string Budget { get; set; }

        [DataMember]
        public string Used { get; set; }

        public Customer(string strCustomerID, string strName, string strEmail
            , string strCountryCode
            , string strBudget
            , string strUsed)
        {
            this.CustomerID = strCustomerID;
            this.Name = strName;
            this.Email = strEmail;
            this.CountryCode = strCountryCode;
            this.Budget = strBudget;
            this.Used = strUsed;
        }