Im working on some classic ASP functions.
In one wsc file im setting the session like so.
Session("ordertype") = "morning"
Then in the other wsc file im checking if that exists like so.
If Session("ordertype") Is Nothing Then
' Do stuff here
End if
But everytime it gets to checking if the session exists, the application just stops.
What am I doing wrong?
The Is operator is valid but not in the context you are trying to use it.
From the VbScript Reference
Compares two object reference variables.
result = object1 Is object2
If you where setting an object reference using the Set command then using this kind of comparison would be acceptable.
In this case though your Session("ordertype") contains a string which is not an object reference type, instead use a simple Len() check to check whether you have assigned a string or not. To avoid Nulls use
'Check Length of Session value avoid Null by concatenating empty string.
If Len(Session("ordertype") & "") > 0 Then
'Do Stuff here
End If
Alternative Method
You can also use
VarType(Session("ordertype"))to check your Session variable type first to avoid Nulls as @ZeeTee suggests.
