Direct Debit

1. creditTransferClass.cs

These five packages are required to be used.

Step 1. Reuse "Credit Transfer" class

2. directDebit.aspx.cs

These 13 packages are required to be used.

Code in Common

(1). Check if user id and password is inside session. When the user id and password is inside user session, it will automatically populate into the user id and pin textbox, so that the user need not manually type his user id and password repeatedly.

Step 2. Store Details which entered by the user. If user id, password, and OTP exist in session, user need not enter again (refer to common staff).

Step 3. Create URL which will be post to the server. User inputs need to be stored in the class created, and serialize into JSON format. In this function, only header is needed.

Step 4. Post to the server, and store response. URL is sent using web request function, and a response will be send back from the server.

Step 5. Obtain error code. If error code is ‘010000’ which means invocation successful, populate attributes of the ‘creditTransfer’ class into the label. If error code is '010041', it means OTP has expired, and we will use the newOTP() function to prompt the user for the OTP again. Else, we will display the ErrorText and ErrorDetails.

The newOTP() function can be referred to under Common Stuff Section

Overview of directDebit.aspx.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using DotNetOpenAuth.OAuth2;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using System.Collections.Specialized;

using System.Configuration;

using System.Net;

using System.IO;

using System.Windows.Forms;

using System.Data;

namespace Demo

{

   public partial class directDebit : System.Web.UI.Page

   {

       protected void Page_Load(object sender, EventArgs e)

       {

           if (Session["userid"] != null)

           {

               txtUserID.Text = (string)Session["userid"];

               txtPassword.Text = (string)Session["pin"];

           }

       }

       protected void btnSend_Click(object sender, EventArgs e)

       {

           try

           {

               //Get user input

               string userID = txtUserID.Text;

               Session["userid"] = userID;

               string pin = txtPassword.Text;

               Session["pin"] = pin;

               string accountFrom = txtAccountFrom.Text;

               string accountTo = txtAccountTo.Text;

               string transactionAmount = txtTransactionAmount.Text;

               string transactionRefNumber = txtTransactionReferenceNumber.Text;

               string narrative = txtNarrative.Text;

               string otp;

               if (Session["otp"] == null)

               {

                   otp = "";

               }

               else

               {

                   otp = Session["otp"].ToString();

               }

               //Build header

               var header = new HeaderJson();

               header.userID = userID;

               header.PIN = pin;

               header.serviceName = "directDebit";

               header.OTP = otp;

               var headerJson = new HeaderJsonObject();

               headerJson.Header = header;

               string strHeader = JsonConvert.SerializeObject(headerJson);

               //Build content

               var content = new ContentJson();

               content.accountFrom = accountFrom;

               content.accountTo = accountTo;

               content.narrative = narrative;

               content.transactionAmount = transactionAmount;

               var contentObj = new ContentJsonObject();

               contentObj.Content = content;

               string strContent = JsonConvert.SerializeObject(contentObj);

               //Build Connection string

               string url = "http://tbankonline.com/SMUtBank_API/Gateway?Header=" + strHeader + "&Content=" + strContent;

               //Get response

               var webRequest = (HttpWebRequest)WebRequest.Create(url);

               webRequest.ContentType = "application/json";

               webRequest.Method = "POST";

               var result = "";

               var httpResponse = (HttpWebResponse)webRequest.GetResponse();

               using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))

               {

                   result = streamReader.ReadToEnd();

               }

               //Parse response into object

               creditTransferClass ct = new creditTransferClass();

               ct = JsonConvert.DeserializeObject<creditTransferClass>(result);

               string ErrorID = ct.Content.ServiceResponse.ServiceRespHeader.GlobalErrorID?.ToString() ?? "-";

               if (ErrorID == "010000")

               {

                   txtBalanceBefore.Text = ct.Content.ServiceResponse.BalanceBefore._content_.ToString();

                   txtBalanceAfter.Text = ct.Content.ServiceResponse.BalanceAfter._content_.ToString();

                   txtTransactionID.Text = ct.Content.ServiceResponse.TransactionID._content_.ToString();

               }

               else if (ErrorID == "010041")

               {

                   otp = utilities.newOTP();

                   Session["otp"] = otp;

               }

               else

               {

                   lblTest.Text = ct.Content.ServiceResponse.ServiceRespHeader.ErrorText.ToString();

                   string errorMessage = ct.Content.ServiceResponse.ServiceRespHeader.ErrorDetails.ToString();

                   MessageBox.Show(errorMessage);

               }

           }

           catch(Exception ex)

           {

               lblExceptionMsg.Text = ex.ToString();

           }

       }

   }

}

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