How To: Credit Card and ACH (e-check) integration with ASP.NET / C#

This is the seventh part in a series of postings on how to integrate credit card and ACH/E-check transactions into various systems. This installment demonstrates code used for processing payments (credit card and/or ACH) within a .NET / C# application.

This was taken from the NELiX TransaX FleXport toolkit documentation. Credit card integration examples can be downloaded on the NELiX TransaX FleXport page.

Assumptions:
- Using NELiX TransaX Payment Gateway
- Communicating using NELiX TransaX Webservice

using System;
using System.Data;
using System.Configuration;
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;


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

  }
  protected void ContinueButton_Click(object sender, ImageClickEventArgs e)
  {
      RoXAPI_WebService.RoXAPI ws = new RoXAPI_WebService.RoXAPI();
      RoXAPI_WebService.Params wsParams = new RoXAPI_WebService.Params();
      RoXAPI_WebService.Responses wsResponse = new RoXAPI_WebService.Responses();

      wsParams.TransactionType = TransactionType.SelectedValue;
      wsParams.GatewayUserName = GatewayUserName.Text;
      wsParams.GatewayPassword = GatewayPassword.Text;
      wsParams.IPAddress = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];

      wsParams.Merchant_Defined_Field_1 = Merchant_Defined_Field_1.Text;
      wsParams.Merchant_Defined_Field_2 = Merchant_Defined_Field_2.Text;

      if(TransactionType.SelectedValue == "void")
          wsParams.TransactionID = TransactionID.Text;      

      if(TransactionType.SelectedValue == "refund")
      {
          wsParams.Amount = Amount.Text;
          wsParams.TransactionID = TransactionID.Text;
      }

      if (TransactionType.SelectedValue == "capture" )
      {
          wsParams.Amount = Amount.Text;
          wsParams.TransactionID = TransactionID.Text;
          wsParams.OrderID = OrderID.Text;
          wsParams.Tracking_Number = Tracking_Number.Text;
          wsParams.Shipping_Carrier = Shipping_Carrier.Text;
      }

      if (TransactionType.SelectedValue == "update")
      {
          wsParams.TransactionID = TransactionID.Text;
          wsParams.Tracking_Number = Tracking_Number.Text;
          wsParams.Shipping_Carrier = Shipping_Carrier.Text;
      }

      if (Customer_Vault_Action.SelectedValue == "delete_customer")
      {
          wsParams.Customer_Vault_Action = Customer_Vault_Action.SelectedValue;
          wsParams.Customer_Vault_ID = Customer_Vault_ID.Text;
      }

      if(TransactionType.SelectedValue == "sale" || TransactionType.SelectedValue == "auth" || Customer_Vault_Action.SelectedValue == "add_customer" || Customer_Vault_Action.SelectedValue == "update_customer" )
      {
          wsParams.PaymentType = PaymentType.SelectedValue;


          if(Customer_Vault_Action.SelectedValue == "add_customer" || Customer_Vault_Action.SelectedValue == "update_customer" )
          {
              wsParams.Customer_Vault_Action = Customer_Vault_Action.SelectedValue;
          }
          wsParams.Customer_Vault_ID = Customer_Vault_ID.Text;

          if (wsParams.PaymentType == "creditcard")
          {
              wsParams.CCNumber = CCNumber.Text;
              wsParams.CCExpDate = CCExpDate.Text;
              wsParams.CVV = CVV.Text;
          }
          if(wsParams.PaymentType == "check")
          {
              wsParams.CheckName = CheckName.Text;
              wsParams.CheckABA = CheckABA.Text;
              wsParams.CheckAccount = CheckAccount.Text;
              wsParams.AccountHolderType = AccountHolderType.SelectedValue;
              wsParams.AccountType = AccountType.SelectedValue;
              wsParams.SecCode = SecCode.SelectedValue;
          }

          wsParams.Payment_Plan_SKU = Payment_Plan_SKU.Text;

          wsParams.Amount = Amount.Text;
          wsParams.Tax = Tax.Text;
          wsParams.Shipping = Shipping.Text;
          wsParams.OrderDescription = OrderDescription.Text;
          wsParams.OrderID = OrderID.Text;
          wsParams.PONumber = PONumber.Text;

          wsParams.FirstName = FirstName.Text;
          wsParams.LastName = LastName.Text;
          wsParams.Company = Company.Text;
          wsParams.Address1 = Address1.Text;
          wsParams.Address2 = Address2.Text;
          wsParams.City = City.Text;
          wsParams.State = State.Text;
          wsParams.Zip = Zip.Text;
          wsParams.Country = Country.Text;
          wsParams.Phone = Phone.Text;
          wsParams.Fax = Fax.Text;
          wsParams.EMail = EMail.Text;
          wsParams.Website = Website.Text;

          wsParams.ShippingFirstName = ShippingFirstName.Text;
          wsParams.ShippingLastName = ShippingLastName.Text;
          wsParams.ShippingCompany = ShippingCompany.Text;
          wsParams.ShippingAddress1 = ShippingAddress1.Text;
          wsParams.ShippingAddress2 = ShippingAddress2.Text;
          wsParams.ShippingCity = ShippingCity.Text;
          wsParams.ShippingState = ShippingState.Text;
          wsParams.ShippingZip = ShippingZip.Text;
          wsParams.ShippingCountry = ShippingCountry.Text;
          wsParams.ShippingEmail = ShippingEmail.Text;

          wsParams.ProcessorID = ProcessorID.Text;
          wsParams.Descriptor = Descriptor.Text;
          wsParams.DescriptorPhone = DescriptorPhone.Text;
      }
    
      wsResponse = ws.ProcessTransaction(wsParams);

      MSG.Text = "STATUS_CODE: " + wsResponse.STATUS_CODE + "";
      MSG.Text += "STATUS_MSG: " + wsResponse.STATUS_MSG + "";
      MSG.Text += "TRANS_ID: " + wsResponse.TRANS_ID + "";
      MSG.Text += "AUTH_CODE: " + wsResponse.AUTH_CODE + "";
      MSG.Text += "AVS_CODE: " + wsResponse.AVS_CODE + "";
      MSG.Text += "AVS_MSG: " + wsResponse.AVS_MSG + "";
      MSG.Text += "CVV2_CODE: " + wsResponse.CVV2_CODE + "";
      MSG.Text += "CVV2_MSG: " + wsResponse.CVV2_MSG + "";
      MSG.Text += "ORDERID: " + wsResponse.ORDERID + "";
      MSG.Text += "CUSTOMER_VAULT_ID: " + wsResponse.CUSTOMER_VAULT_ID + "";
      MSG.Text += "FULLRESPONSE: " + wsResponse.FULLRESPONSE + "";
      MSG.Text += "POSTSTRING: " + wsResponse.POSTSTRING + "";

      if( wsResponse.STATUS_CODE == "1" )
      {
          MSG.Text = "SUCCESS!" + MSG.Text;
      }
      else
      {
          if( wsResponse.STATUS_CODE == "2")
              MSG.Text = "DECLINE" + MSG.Text;
          else
              MSG.Text = "ERROR" + MSG.Text;
        
      }
    

  }
}

If you need any assistance with payment processing integration with your .NET system, we are here to help!

Download .NET /C# credit card and ACH (e-check) integration examples.