gaurav0508
asked on
Accessing ASP session in C# class library
Hi,
I am trying access session created on ASP (not ASP.Net) on C# class library. I tried using system.web.context.current .session[" <Sessionid ."] but its throwing error " Object Reference must set to an object". C# class unable to find session created in ASP.
Thanks,
Gaurav
I am trying access session created on ASP (not ASP.Net) on C# class library. I tried using system.web.context.current
Thanks,
Gaurav
Did you try to get the session first using: HttpContext.Current.Sessio n ?
ASKER
Yes we tried it.
I don't think it is possible. ASP and ASP.NET sessions are two different isolated objects in memory and they cannot "see" each other.
Though there are techniques to exchange session variables between ASP and ASP.NET applications and vice versa, I don't think this will suite you.
Could you please explain how you are using a .NET class library in ASP application?
R
Though there are techniques to exchange session variables between ASP and ASP.NET applications and vice versa, I don't think this will suite you.
Could you please explain how you are using a .NET class library in ASP application?
R
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ASKER
For Ramuncikas:
What we are doing is calling C# dll from ASP pages. C# dlls are kept in GAC.
Session is created on ASP pages. Now these session variable we need to use in C# class. As mentioned we used System.web.context.current .session but its not working.
I tried sending session from ASP to ASP.net (http://www.eggheadcafe.com/articles/20021207.asp) but again I am unable to access the session in C# class. Basically I need to call C# functions from ASP so even if I send session from ASP to ASP.net I have to come back to ASP page to call C# dll.
I did that as well but I think we lose session when we come back from ASP.Net page to ASP.
What we are doing is calling C# dll from ASP pages. C# dlls are kept in GAC.
Session is created on ASP pages. Now these session variable we need to use in C# class. As mentioned we used System.web.context.current
I tried sending session from ASP to ASP.net (http://www.eggheadcafe.com/articles/20021207.asp) but again I am unable to access the session in C# class. Basically I need to call C# functions from ASP so even if I send session from ASP to ASP.net I have to come back to ASP page to call C# dll.
I did that as well but I think we lose session when we come back from ASP.Net page to ASP.
ASKER
Jaggins101:
I have already tried http://www.eggheadcafe.com/articles/20021207.asp and managed to get session on ASP.net page but I need to call C# functions from ASP so even if I send session from ASP to ASP.net I have to come back to ASP page to call C# dll.
I did that as well but when I tried to access session in C# I couldn't do it.I think we lose session when we come back from ASP.Net page to ASP.
I have already tried http://www.eggheadcafe.com/articles/20021207.asp and managed to get session on ASP.net page but I need to call C# functions from ASP so even if I send session from ASP to ASP.net I have to come back to ASP page to call C# dll.
I did that as well but when I tried to access session in C# I couldn't do it.I think we lose session when we come back from ASP.Net page to ASP.
C# class library relies on caller's session, but when caller is ASP application it does not know what kind of object is that and how to work with it. C# class library only knows HttpSession object, but ASP application does not use one.
The only chance would be to pass actual values C# class needs. If you're the author of C# class library then you can rewrite it or add some overloads to functions, otherwise I guess you're stuck.
Maybe you could be more specific about what dlls you try to use. If these are some standard ones maybe you could find some workaround.
R
The only chance would be to pass actual values C# class needs. If you're the author of C# class library then you can rewrite it or add some overloads to functions, otherwise I guess you're stuck.
Maybe you could be more specific about what dlls you try to use. If these are some standard ones maybe you could find some workaround.
R
One quick thought.
As suggested by Jaggins101 your ASP page could create and fill a form with session variables. Additionally you could add one (or more) form elements to pass some value that will denote what or which function to call from C# class library. From ASP you post this from to ASP.NET page or HttpHandler you create.
This ASP.NET page or HttpHandler would create session automatically upon request. It would read all passed variables from form and would setup session. Additionally from a value you pass it would call needed function from C# class library. If you need some result of a function call this same page or HttpHandler could convert it to a well known form (XML) and pass it back to ASP page as response.
I'm mentioning HttpHandler many times because it's more lightweight and it's easier to render response with it than with a page.
Ramuncikas
As suggested by Jaggins101 your ASP page could create and fill a form with session variables. Additionally you could add one (or more) form elements to pass some value that will denote what or which function to call from C# class library. From ASP you post this from to ASP.NET page or HttpHandler you create.
This ASP.NET page or HttpHandler would create session automatically upon request. It would read all passed variables from form and would setup session. Additionally from a value you pass it would call needed function from C# class library. If you need some result of a function call this same page or HttpHandler could convert it to a well known form (XML) and pass it back to ASP page as response.
I'm mentioning HttpHandler many times because it's more lightweight and it's easier to render response with it than with a page.
Ramuncikas