dynamic textboxes in c sharp

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.Services;
using System.ServiceModel.Description;
using System.Net;
//using Microsoft.Xrm.Sdk;
//using Microsoft.Xrm.Sdk.Client;
using System.Data;
using System.Data.SqlClient;
using Microsoft.Xrm.Sdk.Query;
using System.Configuration;
using Sulekha.Order.CrmSdk;
using System.Linq.Expressions;
using Xrm;
using System.Collections.ObjectModel;
using System.Collections;
using System.Collections.Specialized;
using System.ComponentModel;
using System.Drawing;
using System.Web.UI.WebControls;
//using System.Web;
using System.Web.UI;
//using System.Web.UI.WebControls

namespace Sulekha.Order
{
    public partial class acceptpopup : System.Web.UI.Page
    {
       

        protected void Page_Load(object sender, EventArgs e)
        {
            dynamictextboxes();

           
        }

        protected void dynamictextboxes()
        {
            //string noofloop = Session["countnum1"].ToString();

            string selectedsession = Convert.ToString(Session["stringbuild"]);

            string[] seperateditems = selectedsession.Split('#');

            int selectedcount = selectedsession.Length;

            foreach (string needtoseperate in seperateditems)
            {

                string commaseperated = needtoseperate;

                string skuids = (commaseperated.Split(','))[0];
                string guidss = (commaseperated.Split(','))[1];

                //Console.Write("these info for :", skuids);
               

               

                Label lcpn = new Label();
                TextBox tcpn = new TextBox();

                lcpn.Text = " Courier Parnter Name " +" "+"for"+" "+ skuids; //gui.ToString();
                tcpn.ID = "cpn" + guidss;
                //Response.Write("This information for the coupoun number : " + skuids);
                panel1.Controls.Add(lcpn);

                panel1.Controls.Add(tcpn);
                panel1.Controls.Add(new LiteralControl("<br/>"));

                Label lawb = new Label();
                TextBox tawb = new TextBox();

                lawb.Text = " Airway Bill No " + " " + "for" +" " +skuids; //gui.ToString();
                tawb.ID = "awb" + guidss;
                //Response.Write("This information for the coupoun number : " + skuids);
                panel1.Controls.Add(lawb);

                panel1.Controls.Add(tawb);
                panel1.Controls.Add(new LiteralControl("<br/>"));

                Label lvno = new Label();
                TextBox tvno = new TextBox();

               lvno.Text = " Vendor Order Number" + " " + "for" +" " +skuids; //gui.ToString();
                tvno.ID = "vno" + guidss;
                //Response.Write("This information for the coupoun number : " + skuids);
                panel1.Controls.Add(lvno);

                panel1.Controls.Add(tvno);

               
                panel1.Controls.Add(new LiteralControl("<br/>"));

            }         
           

        }

        protected void acceptpopupsubmit_Click(object sender, EventArgs e)
        {

            foreach (Control ctl in panel1.Controls)
            {

                TextBox txts = ctl as TextBox;

                if (txts != null)
                {
                    string txtids = txts.ID;
                    string tdata = txts.Text;

                    string rawid = txtids.Substring(5);

                    Guid orderguids = new Guid();
                    orderguids = new Guid(rawid);

                    string prenameoftxt = txtids.Substring(0, 3);
                   

                    ClientCredentials credentials = new ClientCredentials();
                    credentials.Windows.ClientCredential = CredentialCache.DefaultNetworkCredentials;
                    Uri OrganizationUri = new Uri("http://smdev-crm/SulekhaCRM/XRMServices/2011/Organization.svc");
                    Uri HomeRealmUri = null;
                    using (Microsoft.Xrm.Sdk.Client.OrganizationServiceProxy serviceProxy = new Microsoft.Xrm.Sdk.Client.OrganizationServiceProxy(OrganizationUri, HomeRealmUri, credentials, null))
                    {
                        Microsoft.Xrm.Sdk.IOrganizationService service = (Microsoft.Xrm.Sdk.IOrganizationService)serviceProxy;
                     
                        ColumnSet colns = new ColumnSet(true);
                        var orderdetails = service.Retrieve("salesorder", orderguids, colns);
                        orderdetails["new_venderorderstatus"] = "Shipped";
                        if (prenameoftxt == "cpn")
                        {
                            orderdetails["new_courierpartnername"] = txts.Text;
                        }

                        if (prenameoftxt == "awb")
                        {
                            orderdetails["new_airwaybillno"] = txts.Text;
                        }
                        if (prenameoftxt == "vno")
                        {
                            orderdetails["new_venderorderno"] = txts.Text;
                        }

                        service.Update(orderdetails);

                    }

                }
            }

        }


       

    }
}