How do I implement the Post/Redirect/Get pattern in asp.net WebForms?
asp.net, post-redirect-get
Solution
If the fields POSTed are being persisted before the Redirect and you need to access that data after the Redirect, I would append the identifier for the data record(s) on the query string as you mention. You could also specify a status for the request (for displaying messages etc). Then on the GET page you can read out the data and do whatever with it.
I don't see any other way to get around this as each page obtained by GET will not have access to the previous page's `ViewState` etc.
Using `Server.Transfer` will have the same effect as handling the POST on the original page.
You could use Session variables to store the POST data, but that stinks.
Problem
So I understand the basics of the prg pattern. But I haven't come across a technique for making arbitrary data available to the "get" instance of a page. For example, I might want to display different feedback messages to the user depending on their action which initiated the PostBack. What I've been doing is sending an identifier as a query string parameter. This works fine but it introduces bookmarking issues and doesn't seem like it would scale very well. What if I needed to send all of the ViewState? Unfortunately, I'm tied to WebForms at the moment and haven't been able to convince my organization to migrate to mvc.