Session vars in class file

[cRaCKh0rN]

I am trying to create a property in a class like so

Public Shared Property OrderList() As ArrayList
Get
If System.Web.HttpContext.Current.Session("IsOrder") Is Nothing Then
Return System.Web.HttpContext.Current.Session("IsOrder")
End If

End Get
Set(ByVal Value As ArrayList)
System.Web.HttpContext.Current.Session("IsOrder") = Value
End Set
End Property


This always errors with an System.NullReferenceException.

My question is how do i set this session variable to stop it falling over? If i do System.Web.HttpContext.Current.Session("IsOrder") = new ArrayList or System.Web.HttpContext.Current.Session("IsOrder") = "test" it still errors and says the object does not exist!

I have tried other ways including trying to set the value in the new() but these fail. Am i missing something really obvious about setting session variables in a class?

Please help!

 

[ca8msm]

I'd expect it to return a Null error as your Get method tries to return the value if the session item "Is Nothing". Use "IsNot Nothing" instead...


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[cRaCKh0rN]

Hi, i have tried it various ways. Please also note this other post i have found here. This person has the exact problem

http://www.tek-tips.com/viewthread.cfm?qid=1247457

Even i remove the checking and try to do for example
System.Web.HttpContext.Current.Session("IsOrder") = myArray it will fall over in the same way.

Thanks

 

[cRaCKh0rN]

Ok, i have worked out some of my problem to an extent.

I was making an instance of the class before page load as i wanted it available globally to the page.