The main reason to transfer numeric values in JSON as strings is to eliminate any loss of precision or ambiguity in transfer. It’s true that the JSON spec does not specify a precision for numeric values. This does not mean that JSON numbers have infinite precision. It means that numeric precision is not specified, which … Read more
Add Web Reference is the old-style, deprecated ASP.NET webservices (ASMX) technology (using only the XmlSerializer for your stuff) – if you do this, you get an ASMX client for an ASMX web service. You can do this in just about any project (Web App, Web Site, Console App, Winforms – you name it). Add Service … Read more
First, you need to obtain the public certificate from the server you’re trying to connect to. That can be done in a variety of ways, such as contacting the server admin and asking for it, using OpenSSL to download it, or, since this appears to be an HTTP server, connecting to it with any browser, … Read more
You have to enable auto return in your PayPal account, otherwise it will ignore the return field. From the documentation (updated to reflect new layout Jan 2019): Auto Return is turned off by default. To turn on Auto Return: Log in to your PayPal account at https://www.paypal.com or https://www.sandbox.paypal.com The My Account Overview page appears. … Read more
What you’re talking about is becoming a payment service provider. I have been there and done that. It was a lot easier about 10 years ago than it is now, but if you have a phenomenal amount of time, money and patience available, it is still possible. You will need to contact an acquiring bank. … Read more