Paypal Payment Gateway Integration using ASP.NET
First Create Paypal sandbox account https://developer.paypal.com/ For Sandbox :- "https://www.sandbox.paypal.com/cgi-bin/webscr?"; For Live :- "https://www.paypal.com/cgi-bin/webscr?"; ==================On Pay Button Click --------------------------------Check whether item in list if (dt.Rows.Count != 0) { for (int i = 0; i < dt.Rows.Count; i++) { if (i == 0) { url = "https://www.sandbox.paypal.com/cgi-bin/webscr?"; url += "cmd=_cart"; url += "&upload=" + i.ToString() + ""; ...