Methods for obtaining sessions in ASP. NET ASHX

1-In aspx and aspx. cs, both are read and write based on Session ["xxx"] = "aaa" and aaa = Session ["xxx"]. ToString.

In ashx, sessions use context. Session. The read/write method is as follows:

Context. Session ["xxx"] = "aaa" and aaa = context. Session ["xxx"]. ToString ()

2-in the ashx file, to successfully read and write sessions, you should add the IRequiresSessionState interface (add

You may be prompted to add a reference to the namespace using System. Web. SessionState). Otherwise, context. Session ["xxx"] always reads null.

Aspx. cs directly requests and sessions, while ashx is context. request and context. session. aspx. cs can be used directly because of Web. in UI and ashx, requests and sessions can be operated only by the HTTP context instance that is passed in. The cs file in the AppCode does not contain Web. UI and does not have the HttpContext parameter. If the current HttpContext can be obtained in cs, you can operate the Request and Session based on the HttpContext.

To operate sessions in cs, the IRequiresSessionState interface should be added. The HttpContext class has a static attribute called Current, which can be used to obtain the Current HttpContext.

To obtain the IP address of the Current visitor in the cs file of AppCode, you can use HttpContext. Current. Request. UserHostAddress.