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When Session_End is called

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Intr-o aplicatie web, avem doua metode in Global.asax.cs care se apeleaza in momentul in care o sesiune este creata sau cand aceasta se termina:

  • Session_Start
  • Session_End

Daca Session_Start este apelat cand o sesiune este create, trebuie avut grija cu Session_End. Exista cateva cazuri cand aceasta metoda nu este apelata:

  • Este apelata doar daca sesiune este “InProc”. Daca tinem sesiune in AppFabric Cache sau pe SQL Server atunci Session_End nu o sa fie apelat.
  • Cand userul inchide browerul. Din cauza ca protocol HTTP este stateless, nu aveti cum sa detectati acest eveniment by default. In functie de brower acest eveniment se poate detecta, dar nu va face trigger la Session_End by default.
  • Daca in sesiune nu aveti nici o informatie atunci metoda Session_End nu o sa fie apelata.

Aceasta metoda este apelata de catre un worker processor. Din aceasta cauza pe thread-ul respective nu o sa aveti acces la toate resursele, chiar daca in Session_Start le-ati avut pe toate. De exemplu daca va conectati la o baza de date cu contul de Windows, conexiunea o sa mearga pe Session_Start, dar pe Session_End nu o sa puteti accesa baza de date.

Metoda Session_End este in urmatoarele cazuri:

  • Cand dupa un anumit interval de timp sesiune expira. Aceasta valoare se seteaza de obicei din fisierul de configurare.
  • Cand este apelata metoda Session.Abondon.

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