C#
Calculate Partial Loan Repayment
1. calculatePartialLoanRepayment.cs
These four packages are required to be used.
Step 1. Create class file to store content of the web response.
2. calculatePartialLoanRepayment.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 entered by the user. If user id, password, and OTP exist in session, user need not enter again (refer to common stuff).
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, both header and content are 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. The response need to be deserialized into the ‘calculatePartialLoanRepayment’ class.
Step 5. Obtain error code. If error code is ‘010000’ which means invocation successful, populate attributes of the ‘calculatePartialLoanRepayment’ 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 calculatePartialLoanRepayment.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace Demo
{
public class calculatePartialLoanRepaymentRootObject
{
public calculatePartialLoanRepaymentContent Content { get; set; }
}
public class calculatePartialLoanRepaymentContent
{
public calculatePartialLoanRepaymentServiceResponse ServiceResponse { get; set; }
}
public class calculatePartialLoanRepaymentServiceResponse
{
public PartialRepaymentResponse PartialRepaymentResponse { get; set; }
public calculatePartialLoanRepaymentServiceRespHeader ServiceRespHeader { get; set; }
}
public class calculatePartialLoanRepaymentServiceRespHeader
{
public string ErrorText { get; set; }
public object ErrorDetails { get; set; }
public string GlobalErrorID { get; set; }
}
public class PartialRepaymentResponse
{
public string Status { get; set; }
public string NewLoanAmount { get; set; }
public string BalanceAfterRepayment { get; set; }
public string PenaltyRate { get; set; }
public string NewMaturityDate { get; set; }
public string NewMonthsRemaining { get; set; }
public string OldMonthlyInstallment { get; set; }
public string OldMaturityDate { get; set; }
public string OldLoanTerm { get; set; }
public string NewMonthlyInstallment { get; set; }
public string BalanceBeforeRepayment { get; set; }
public string SettlementAccountBalance { get; set; }
public string PenaltyAmount { get; set; }
public string SettlementAccountID { get; set; }
public string NewInterest { get; set; }
public string InterestRate { get; set; }
public string NewLoanTerm { get; set; }
public string RepaymentAmountAfterPenalty { get; set; }
}
}
Overview of calculatePartialLoanRepayment.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 System.Collections.Specialized;
using System.Configuration;
using System.Net;
using System.IO;
using System.Windows.Forms;
namespace Demo
{
public partial class CalculatePartialLoanRepayment : 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)
{
if (Page.IsValid)
{
try
{
string userID = txtUserID.Text;
Session["userid"] = userID;
string pin = txtPassword.Text;
Session["pin"] = pin;
string accountID = txtAccountID.Text;
string repaymentAmount = txtrepaymentAmount.Text;
string keepMaturityDate = txtkeepMaturityDate.Text;
string otp;
if (Session["otp"] == null)
{
otp = "1";
}
else
{
otp = Session["otp"].ToString();
}
var header = new HeaderJson();
header.userID = userID;
header.PIN = pin;
header.serviceName = "calculatePartialLoanRepayment";
header.OTP = otp;
var headerJson = new HeaderJsonObject();
headerJson.Header = header;
string strHeader = JsonConvert.SerializeObject(headerJson);
var content = new ContentJson();
content.accountID = accountID;
content.repaymentAmount = repaymentAmount;
content.keepMaturityDate = keepMaturityDate;
var contentJson = new ContentJsonObject();
contentJson.Content = content;
string strContent = JsonConvert.SerializeObject(contentJson);
string url = "http://tbankonline.com/SMUtBank_API/Gateway?Header=" + strHeader + "&Content=" + strContent;
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();
}
calculatePartialLoanRepaymentRootObject cal = new calculatePartialLoanRepaymentRootObject();
cal = JsonConvert.DeserializeObject<calculatePartialLoanRepaymentRootObject>(result);
string globalErrorID = cal.Content.ServiceResponse.ServiceRespHeader.GlobalErrorID.ToString();
if (globalErrorID == "010000")
{
lblBalanceAfterRepayment.Text = cal.Content.ServiceResponse.PartialRepaymentResponse.BalanceAfterRepayment.ToString();
lblBalanceBeforeRepayment.Text = cal.Content.ServiceResponse.PartialRepaymentResponse.BalanceBeforeRepayment.ToString();
lblInterestRate.Text = cal.Content.ServiceResponse.PartialRepaymentResponse.InterestRate.ToString();
lblNewInterest.Text = cal.Content.ServiceResponse.PartialRepaymentResponse.NewInterest.ToString();
lblNewLoanAmount.Text = cal.Content.ServiceResponse.PartialRepaymentResponse.NewLoanAmount.ToString();
lblNewLoanTerm.Text = cal.Content.ServiceResponse.PartialRepaymentResponse.NewLoanTerm.ToString();
lblNewMaturityDate.Text = cal.Content.ServiceResponse.PartialRepaymentResponse.NewMaturityDate.ToString();
lblNewMonthlyInstallment.Text = cal.Content.ServiceResponse.PartialRepaymentResponse.NewMonthlyInstallment.ToString();
lblNewMonthsRemaining.Text = cal.Content.ServiceResponse.PartialRepaymentResponse.NewMonthsRemaining.ToString();
lblOldLoanTerm.Text = cal.Content.ServiceResponse.PartialRepaymentResponse.OldLoanTerm.ToString();
lblOldMaturityDate.Text = cal.Content.ServiceResponse.PartialRepaymentResponse.OldMaturityDate.ToString();
lblOldMonthlyInstallment.Text = cal.Content.ServiceResponse.PartialRepaymentResponse.OldMonthlyInstallment.ToString();
lblPenaltyAmount.Text = cal.Content.ServiceResponse.PartialRepaymentResponse.PenaltyAmount.ToString();
lblPenaltyRate.Text = cal.Content.ServiceResponse.PartialRepaymentResponse.PenaltyRate.ToString();
lblRepaymentAmountAfterPenalty.Text = cal.Content.ServiceResponse.PartialRepaymentResponse.RepaymentAmountAfterPenalty.ToString();
lblSettlementAccountBalance.Text = cal.Content.ServiceResponse.PartialRepaymentResponse.SettlementAccountBalance.ToString();
lblSettlementAccountID.Text = cal.Content.ServiceResponse.PartialRepaymentResponse.SettlementAccountID.ToString();
lblStatus.Text = cal.Content.ServiceResponse.PartialRepaymentResponse.Status.ToString();
}
else if (globalErrorID == "010041")
{
otp = utilities.newOTP();
Session["otp"] = otp;
}
else
{
lblTest.Text = cal.Content.ServiceResponse.ServiceRespHeader.ErrorText.ToString();
string errorMessage = cal.Content.ServiceResponse.ServiceRespHeader.ErrorDetails.ToString();
lblErrorMessage.Text = errorMessage;
}
}
catch (Exception ex)
{
lblExceptionMsg.Text = ex.ToString();
}
}
}
}
}
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