post xml data from ASP.NET app to ASP app
I need to transfer a user from an ASP.NET application to an ASP application at one point during a holiday booking process. The search for locations and options etc happens in the ASP.NET application, but to take payment and finalize the booking I need to transfer the user over to an existing ASP application. At the point when they need to be transferred, there is a large amount of object data stored in the viewstate which represents the options they have chosen.
I have thought of 3 possibilities to acheive this.
1. simply post the viewstate and extract the data out on the ASP side. This is a very neat solution on the ASP.NET side, but unfortunately creates a lot of complexity on the ASP side. I have not had any luck in attempting to decode the viewstate in ASP.
2. Have a hidden field on the ASP.net form which contains an XML representation of the data, which can be posted to the ASP app and easily interpreted there. My concern with this approach is that all that data is already in the page's viewstate and so adding it all to another field will make the page even bigger and therefore slower to load. (But most people use broadband these days, so maybe its not such a big deal any more).
3. post back the ASP.NET web form, and in the event handler simply redirect to the url of the ASP app with all the data encrypted into the querystring. This would be a neat a simple solution, but querystring can be tamperred with easily and also has a size limit.
For options 2 and 3, i would need some way to encode the data that can easily be decoded at the other end. At this point, the data is not sensitive so i don't need a high degree of encryption, just enough to obscure the data from the user.
(I am programming both sides of the system, so am not restriced in the solution i choose).
Has anyone out there successfully done something like this? I will welcome any helpful suggestions or advice. Also let me know if theres any other forums that might be able to help me.