Confused about how to use Microsoft.AspNetCore.SystemWebAdapters while trying to port from old ASP.NET website to new ASP.NET Core web app

Question

https://stackoverflow.com/questions/78589165/confused-about-how-to-use-microsoft-aspnetcore-systemwebadapters-while-trying-to

Can some one tell me how to approach this?

Answer 1

your goal is not clear. it looks like you writing a compatibly library, but not sure the purpose.

the web adapters main goal is to port system.web.dll dependent code to .net core. especially dependent libraries that used system.web.dll. it supplies:

• a HttpContext which has the similar methods as system.web.dll. the trick here is the abstract library is used by the .net standard code. when implemented in old framework it uses the native library, when implemented in .net core, its a new object that calls asp.net core methods. Note that the two HttpContext have different namespaces. the adapter library for core supports implicit conversion of core HttpContext to the abstract context implementation.
• support of the common system.web utilities
• limited support of HttpContext.Current & current user. see: https://learn.microsoft.com/en-us/aspnet/core/migration/inc/usage_guidance?view=aspnetcore-8.0
• a Session api more like system.web.dll
• remote authentication (call asp.net framework site for common authentication)
• a .net core HttpApplication object with similar events to system.web.dll
• support of system.web modules as middleware

generally you first should migrate all dependent libraries to netstandard 2.0. this will allow them to work in both platforms.