C# Tech Process Payment Gateway Implementation

1. Payment Request Page
   
   #region Tech Process Code
   COM.TPSLUtil1 objTPSLUtil1 = new COM.TPSLUtil1();
   COM.CheckSumRequestBean objCheckSumRequestBean = new COM.CheckSumRequestBean();
   
   objCheckSumRequestBean.MerchantTranId = YOUR TRANSACTION ID;
   objCheckSumRequestBean.MarketCode = CURRENCY CODE;
   objCheckSumRequestBean.AccountNo = BANK ACCOUNT CODE
   objCheckSumRequestBean.Amt = PAYMENT AMOUNT
   objCheckSumRequestBean.BankCode = "240";
   objCheckSumRequestBean.PropertyPath = "C:\\MerchantDetails.property";
   
   string strMsg = objTPSLUtil1.transactionRequestMessage(objCheckSumRequestBean);
   
   if (!strMsg.Equals(""))
   {
       Response.Redirect("https://www.tpsl-india.in/PaymentGateway/TransactionRequest.jsp?msg=" + strMsg);
   }
   #endregion
2. Payment Response Page
   
   protected void Page_Load(object sender, EventArgs e)
   {
       try
       {
           if (!Page.IsPostBack)
           {
   
           COM.CheckSumResponseBean objCheckSumResponseBean = new COM.CheckSumResponseBean();
           TPSLUtil1 objTPSLUtil1 = new TPSLUtil1();
           String strResponseMsg = Request["msg"] == null ? "" : Request["msg"].Trim();
             
           string strResponceIP = HttpContext.Current.Request.UserHostAddress;
           string strLogDesc = string.Empty;
   
           String[] token = strResponseMsg.Split('|');
           string txtchecksum, txtauthstatus, txterrordesc, txtsettlementtype, txtaddtninfo1, txtaddtninfo2, txtaddtninfo3, txterrorstatus;
          
           if (token.Length == 26)
           {
               txtchecksum = token[25].ToString();
               txtauthstatus = token[14].ToString();
               txterrordesc = token[24].ToString();
               txtauthstatus = token[14].ToString();
               txtsettlementtype = token[15].ToString();
               txtaddtninfo1 = token[16].ToString();
               txtaddtninfo2 = token[17].ToString();
               txtaddtninfo3 = token[18].ToString();
               txterrorstatus = token[23].ToString();
   
               if (txtauthstatus == "0399")
               {
               // ERROR IN PAYMENT
               // REDIRECT TO ERROR PAGE   
               return;
               }
           }
           else
           {
               // NOT VALID RESPONSE
               // REDIRECT TO ERROR PAGE
               return;
           }
   
           string strRemarks = "Merchant Id:" + token[0].ToString() + ", Subscriber Id:" + token[1].ToString() + ", Ref No:" + token[2].ToString() + ", Bank Ref No:" + token[3].ToString() + ", Amount:" + token[4].ToString() + ", Bank Id:" + token[5].ToString() + ", Bank Merchant Id:" + token[6].ToString() + ", cntype:" + token[7].ToString() + ", Currency:" + token[8].ToString() + ", temCode:" + token[9].ToString() + ", Security Type:" + token[10].ToString() + ", Security ID:" + token[11].ToString() + ", Security Pass:" + token[12].ToString() + ", Date:" + token[13].ToString() + ", Status:" + token[14].ToString() + ", Settellement Type:" + token[15].ToString() + ", Add Info1:" + token[16].ToString() + ", Add Info2:" + token[17].ToString() + ", Add Info3:" + token[18].ToString() + ", Add Info4:" + token[19].ToString() + ", Add Info5:" + token[20].ToString() + ", Add Info6:" + token[21].ToString() + ", Add Info7:" + token[22].ToString() + ", Error Status:" + token[23].ToString() + ", Error Desc:" + token[24].ToString() + ", Check Sum:" + token[25].ToString();
   
           objCheckSumResponseBean.MSG = strResponseMsg;
           objCheckSumResponseBean.PropertyPath = "C:\\TechProcess-Interface\\NLMerchantDetails.property";
          
           string strCheckSumValue = string.Empty;
          
           strCheckSumValue = objTPSLUtil1.transactionResponseMessage(objCheckSumResponseBean);
   
           if (!strCheckSumValue.Equals(""))
           {
               if (!txtchecksum.Equals(strCheckSumValue))
               {
               txtauthstatus = "0399";
               // Transaction Failed due to checksum mismatch
               // REDIRECT TO ERROR PAGE
   
               }
               else
               {
               //0300 // SUCCESS CODE
               try
               {
                   // UPDATE THE TRANSACTION STATUS IN DB
                   //
                   // CODE FOR UPDATE STATUS
                   //
                   //
          
                   // REDIRECT TO OTHER PAGE OR SHOW THE PAYMENT RESPONSE ON SAME PAGE
               }
               catch (Exception ex)
               {
                   // INVALID RESPONSE CODE
                   // REDIRECT TO ERROR PAGE
               }
               }
           }
           else
           {
               // INVALID RESPONSE CODE
               // REDIRECT TO ERROR PAGE
           }
   
           }
       }
       catch (Exception ex)
       {
           // ERROR OCCURED
           // REDIRECT TO ERROR PAGE
       }
   
   }