Problem with calling data from text box

[freshfitz]

I need to call data on my behind code of a textbox on my .aspx page. This text box is populating from a sql database.

So basically where postdata.append is I need postdata.append (DATA FROM CARDNUMTEXTBOX)

.aspx
<b>Card Number</b></td>
<td>
<asp:TextBox ID="CardNumTextBox" runat="server" Columns="20" Rows="4"
Text='<% #Bind("cardacct")%>' ValidationGroup="add"></asp:TextBox>
</td>

.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Net;
using System.Text;
using System.IO;
using System.Text.RegularExpressions;


public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

if (Request.IsAuthenticated)
{
Label2.Text = "";
CustSearch.Focus();


}
else
{
Response.Redirect("./Login.aspx");
}

}
protected void Search_Click(object sender, EventArgs e)
{
string sqlCmd = "Select * From customer Where cust_no = '" + CustSearch + "'";

}
protected void CustSearch_TextChanged(object sender, EventArgs e)
{

}
protected void DetailsView1_PageIndexChanging(object sender, DetailsViewPageEventArgs e)
{

}


protected void CCButton_Click(object sender, EventArgs e)
{
{

//PayPal offers an SDK for .net that can be downloaded here: http://www.pdncommunity.com/pdn/board/message?board.id=payflow&message.id=569

//this was created because the SDK can be somewhat confusing.



//*************** Note ***********************

//before using this code change the following line below:

//wrWebRequest.Headers.Add("X-VPS-VIT-Client-Certification-Id:10");

//you need to change the ID to something beside 14 that will be unique



//1. Set the url to send the transaction to

//test pilot-payflowpro.paypal.com

string postURL = "https://pilot-payflowpro.paypal.com";

//live

//string postURL = "https://payflowpro.verisign.com/transaction";

//2. Set your user info. This is case sensitive

string PWD = "xxx";
string USER = "xxx;
string VENDOR = "xxx";
string PARTNER = "xxx;



//3. now create the name value pair string to send to the Payflow servers

//more variables can be found in the docs that can be downloaded from your payflow manager

StringBuilder postData = new StringBuilder();

//***************add the user info***************

postData.Append("PWD=" + PWD);
postData.Append("&USER=" + USER);
postData.Append("&PARTNER=" + PARTNER);
postData.Append("&VENDOR=" + VENDOR);

//***************add some required info for testing***************

postData.Append("&CUSTIP=" + Request.UserHostAddress);

//S for Sale. A for Auth. More in the docs

postData.Append("&TRXTYPE=S");
postData.Append("&AMT=" + Balance);






//this is in the format MMYY

postData.Append("&EXPDATE=0109");
postData.Append("&ACCT=5105105105105100");
postData.Append("&CVV2=123");
postData.Append("&FIRSTNAME=bob");
postData.Append("&LASTNAME=smith");
postData.Append("&STREET=155515 Q St");
postData.Append("&STATE=NE");
postData.Append("&CITY=Omaha");
postData.Append("&ZIP=68137");
postData.Append("&COUNTRY=US");
//C is for credit card, P is for PayPal Express Checkout. More in the docs
postData.Append("&TENDER=C");

//*************add some optional feilds***************

postData.Append("&COMMENT1=ASP.NET Testing");

//make sure that the "@" is not url encoded or you will get an error

postData.Append("&email=user@xyz.com");

//this is if you want to have PayPal send an IPN post

//postData.Append("&NOTIFYURL=" + xxxx);

//removed for now: INVNUM=12345678&

//add the REQUEST_ID

postData.Append("&REQUEST_ID=" + System.Guid.NewGuid().ToString());

//write out the post data

Response.Write("PostData:<br> " + postData + "<br><br>");



byte[] requestBytes = Encoding.UTF8.GetBytes(postData.ToString());

HttpWebRequest wrWebRequest = (HttpWebRequest)WebRequest.Create(postURL);



//Set WebRequest Properties

wrWebRequest.Method = "POST";

wrWebRequest.Accept = "text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5";

wrWebRequest.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.7) Gecko/20060909 Firefox/1.5.0.7";

wrWebRequest.ContentType = "text/namevalue";

wrWebRequest.ContentLength = requestBytes.Length;

wrWebRequest.AllowAutoRedirect = false;



//add the custom headers

wrWebRequest.Headers.Add("X-VPS-Timeout:30");
wrWebRequest.Headers.Add("X-VPS-VIT-Client-Architecture:x86");
wrWebRequest.Headers.Add("X-VPS-VIT-Client-Certification-Id:14");
wrWebRequest.Headers.Add("X-VPS-VIT-Client-Type:ASP.NET");
wrWebRequest.Headers.Add("X-VPS-VIT-Client-Version:0.0.1");
wrWebRequest.Headers.Add("X-VPS-VIT-Integration-Product:Homegrown");
wrWebRequest.Headers.Add("X-VPS-VIT-Integration-Version:0.0.1");
wrWebRequest.Headers.Add("X-VPS-VIT-OS-Name:windows");
wrWebRequest.Headers.Add("X-VPS-VIT-OS-Version:2002_SP2");



// write the form values into the request message

Stream reqStream = wrWebRequest.GetRequestStream();

reqStream.Write(requestBytes, 0, requestBytes.Length);

// Get the response.

HttpWebResponse hwrWebResponse = (HttpWebResponse)wrWebRequest.GetResponse();

reqStream.Close();

StreamReader responseReader = new StreamReader(wrWebRequest.GetResponse().GetResponseStream());



string responseData = responseReader.ReadToEnd();
responseReader.Close();
//Response.Write("Response Data:<br>" + responseData);
Label2.Text = ("Response Data:<br>" + responseData);


}
}
}