http://www.c-sharpcorner.com/uploadfile/c42694/integrate-payumoney-in-asp-net/
Or
Directly get values from db and send it to payumoney
**************************
In Webconfig
*******************************
<appSettings>
<add key="MERCHANT_KEY" value="gtKFFx"/>
<add key="SALT" value="eCwWELxi"/>
<add key="PAYU_BASE_URL" value="https://test.payu.in"/>
<add key="action" value=""/>
<add key="hashSequence" value="key|txnid|amount|productinfo|firstname|email|udf1|udf2|udf3|udf4|udf5|udf6|udf7|udf8|udf9|udf10"/>
</appSettings>
**************************
in C# Page
**************************
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Security.Cryptography;
using System.Configuration;
using System.Text;
using System.Data;
using DataLogicLayer;
public partial class paymentprocess : System.Web.UI.Page
{
cls_connection con = new cls_connection();
public string action1 = string.Empty;
public string hash1 = string.Empty;
public string txnid1 = string.Empty;
protected void Page_Load(object sender, EventArgs e)
{
try
{
//set merchant key from web.config or AppSettings
key.Value = ConfigurationManager.AppSettings["MERCHANT_KEY"];
processnow();
}
catch (Exception ex)
{
Response.Write("<span style='color:red'>" + ex.Message + "</span>");
}
}
/// <summary>
/// Generate HASH for encrypt all parameter passing while transaction
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
public string Generatehash512(string text)
{
byte[] message = Encoding.UTF8.GetBytes(text);
UnicodeEncoding UE = new UnicodeEncoding();
byte[] hashValue;
SHA512Managed hashString = new SHA512Managed();
string hex = "";
hashValue = hashString.ComputeHash(message);
foreach (byte x in hashValue)
{
hex += String.Format("{0:x2}", x);
}
return hex;
}
private void processnow()
{
try
{
string qry;
if (Request.QueryString["chkid"] != null)
{
qry = "select a.NetAmount,b.Name,b.Email,b.MobileNo from dbo.Checkout as a inner join dbo.RegistrationCustomer as b on a.CustomerId=b.CustomerId where a.checkoutid=" + Request.QueryString["chkid"].ToString() + " and a.CustomerId=" + Session["OwnerId"].ToString() + " ";
DataSet ds = new DataSet();
ds = con.select_data_ds(qry);
string amountval = ds.Tables[0].Rows[0][0].ToString();
string nameval = "israr";// ds.Tables[0].Rows[0][1].ToString();
string emailval = ds.Tables[0].Rows[0][2].ToString();
string mobileNoval = ds.Tables[0].Rows[0][3].ToString();
string productinfo = "YourProductName";
string successurl = "http://localhost:62991/payumoneysuccess.aspx";
string failureurl = "http://localhost:62991/payumoneyfail.aspx";
string cancelurl = "http://localhost:62991/payumoneycancel.aspx";
string[] hashVarsSeq;
string hash_string = string.Empty;
if (string.IsNullOrEmpty(Request.Form["txnid"])) // generating txnid
{
Random rnd = new Random();
string strHash = Generatehash512(rnd.ToString() + DateTime.Now);
txnid1 = strHash.ToString().Substring(0, 20);
}
else
{
txnid1 = Request.Form["txnid"];
}
if (string.IsNullOrEmpty(Request.Form["hash"])) // generating hash value
{
if (
string.IsNullOrEmpty(ConfigurationManager.AppSettings["MERCHANT_KEY"]) ||
string.IsNullOrEmpty(txnid1) ||
string.IsNullOrEmpty(amountval) ||
string.IsNullOrEmpty(nameval) ||
string.IsNullOrEmpty(emailval ) ||
string.IsNullOrEmpty(mobileNoval) ||
string.IsNullOrEmpty(productinfo) ||
string.IsNullOrEmpty(successurl) ||
string.IsNullOrEmpty(failureurl)
)
{
//error
frmError.Visible = true;
return;
}
else
{
frmError.Visible = false;
hashVarsSeq = ConfigurationManager.AppSettings["hashSequence"].Split('|'); // spliting hash sequence from config
hash_string = "";
foreach (string hash_var in hashVarsSeq)
{
if (hash_var == "key")
{
hash_string = hash_string + ConfigurationManager.AppSettings["MERCHANT_KEY"];
hash_string = hash_string + '|';
}
else if (hash_var == "txnid")
{
hash_string = hash_string + txnid1;
hash_string = hash_string + '|';
}
else if (hash_var == "amount")
{
hash_string = hash_string + Convert.ToDecimal(amountval).ToString("g29");
hash_string = hash_string + '|';
}
else if (hash_var == "productinfo")
{
hash_string = hash_string + productinfo;
hash_string = hash_string + '|';
}
else if (hash_var == "firstname")
{
hash_string = hash_string + nameval;
hash_string = hash_string + '|';
}
else if (hash_var == "email")
{
hash_string = hash_string + emailval;
hash_string = hash_string + '|';
}
else
{
hash_string = hash_string + (Request.Form[hash_var] != null ? Request.Form[hash_var] : "");// isset if else
hash_string = hash_string + '|';
}
}
hash_string += ConfigurationManager.AppSettings["SALT"];// appending SALT
hash1 = Generatehash512(hash_string).ToLower(); //generating hash
action1 = ConfigurationManager.AppSettings["PAYU_BASE_URL"] + "/_payment";// setting URL
}
}
else if (!string.IsNullOrEmpty(Request.Form["hash"]))
{
hash1 = Request.Form["hash"];
action1 = ConfigurationManager.AppSettings["PAYU_BASE_URL"] + "/_payment";
}
if (!string.IsNullOrEmpty(hash1))
{
hash.Value = hash1;
txnid.Value = txnid1;
System.Collections.Hashtable data = new System.Collections.Hashtable(); // adding values in gash table for data post
data.Add("hash", hash.Value);
data.Add("txnid", txnid.Value);
data.Add("key", key.Value);
string AmountForm = Convert.ToDecimal(amountval).ToString("g29");// eliminating trailing zeros
amount.Text = AmountForm;
data.Add("amount", AmountForm);
data.Add("firstname", nameval );
data.Add("email", emailval);
data.Add("phone",mobileNoval);
data.Add("productinfo", productinfo );
data.Add("surl", successurl );
data.Add("furl", failureurl);
data.Add("lastname", "");
data.Add("curl", cancelurl);
data.Add("address1", "");
data.Add("address2", "");
data.Add("city", "");
data.Add("state", "");
data.Add("country","");
data.Add("zipcode", "");
data.Add("udf1", "");
data.Add("udf2", "");
data.Add("udf3", "");
data.Add("udf4", "");
data.Add("udf5", "");
data.Add("pg", pg.Text.Trim());
string strForm = PreparePOSTForm(action1, data);
Page.Controls.Add(new LiteralControl(strForm));
}
else
{
//no hash
}
}
}
catch (Exception ex)
{
Response.Write("<span style='color:red'>" + ex.Message + "</span>");
}
}
private string PreparePOSTForm(string url, System.Collections.Hashtable data) // post form
{
//Set a name for the form
string formID = "PostForm";
//Build the form using the specified data to be posted.
StringBuilder strForm = new StringBuilder();
strForm.Append("<form id=\"" + formID + "\" name=\"" +
formID + "\" action=\"" + url +
"\" method=\"POST\">");
foreach (System.Collections.DictionaryEntry key in data)
{
strForm.Append("<input type=\"hidden\" name=\"" + key.Key +
"\" value=\"" + key.Value + "\">");
}
strForm.Append("</form>");
//Build the JavaScript which will do the Posting operation.
StringBuilder strScript = new StringBuilder();
strScript.Append("<script language='javascript'>");
strScript.Append("var v" + formID + " = document." +
formID + ";");
strScript.Append("v" + formID + ".submit();");
strScript.Append("</script>");
//Return the form and the script concatenated.
//(The order is important, Form then JavaScript)
return strForm.ToString() + strScript.ToString();
}
}
*******************************
On Sucess page
******************************
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace PayUDemo
{
public partial class payumoneysuccess: System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
try
{
string[] merc_hash_vars_seq;
string merc_hash_string = string.Empty;
string merc_hash = string.Empty;
string order_id = string.Empty;
string hash_seq = "key|txnid|amount|productinfo|firstname|email|udf1|udf2|udf3|udf4|udf5|udf6|udf7|udf8|udf9|udf10";
if (Request.Form["status"] == "success")
{
merc_hash_vars_seq = hash_seq.Split('|');
Array.Reverse(merc_hash_vars_seq);
merc_hash_string = ConfigurationManager.AppSettings["SALT"] + "|" + Request.Form["status"];
foreach (string merc_hash_var in merc_hash_vars_seq)
{
merc_hash_string += "|";
merc_hash_string = merc_hash_string + (Request.Form[merc_hash_var] != null ? Request.Form[merc_hash_var] : "");
}
merc_hash = Generatehash512(merc_hash_string).ToLower();
if (merc_hash != Request.Form["hash"])
{
//Value didn't match that means some paramter value change between transaction
Response.Write("Hash value did not matched");
}
else
{
//if hash value match for before transaction data and after transaction data
//that means success full transaction , see more in response
order_id = Request.Form["txnid"];
Response.Write("value matched");
//Hash value did not matched
}
}
else
{
Response.Write("Hash value did not matched");
// osc_redirect(osc_href_link(FILENAME_CHECKOUT, 'payment' , 'SSL', null, null,true));
}
}
catch (Exception ex)
{
Response.Write("<span style='color:red'>" + ex.Message + "</span>");
}
}
/// <summary>
/// Generate HASH for encrypt all parameter passing while transaction
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
public string Generatehash512(string text)
{
byte[] message = Encoding.UTF8.GetBytes(text);
UnicodeEncoding UE = new UnicodeEncoding();
byte[] hashValue;
SHA512Managed hashString = new SHA512Managed();
string hex = "";
hashValue = hashString.ComputeHash(message);
foreach (byte x in hashValue)
{
hex += String.Format("{0:x2}", x);
}
return hex;
}
}
}
