Newbie Q: Using the session state object

[Ant]

Hi,

I'm experimenting with the session state to see how it works. I'm trying to
increment with every page load. When I try to do this, I get an error
indicating that the page state object is either null or not instantiated. I
can't seem to get around this.
Below is the code I'm using:

Page.Session["MyInc"] = Int32.Parse((Page.Session["MyInc"].ToString()))+1;
labelOP.Text = Page.Session["MyInc"].ToString();

It's ok when I build, just when I run do I get the error.

Why does this not work?

Many thanks for helping me understand how to use this correctly
Ant

 

[Manish]

You would need to assign the value to Session variable in the Session_start
event in the Global.asax like below:

Sub Session_Start(ByVal sender As Object, ByVal e As EventArgs)
' Code that runs when a new session is started
Session("test") = 1234
End Sub

Then you can increment the value of the Session in the Page Load event
whenever it postbacks.

Protected Sub Page_Load(ByVal sender As Object, ByVal e As
System.EventArgs) Handles Me.Load
Dim intValue As Integer
intValue = CInt(Session("test"))
intValue += 1
Session("test") = intValue.ToString()
Response.Write(Session("test"))
End Sub

Regards,
Manish
www.componentone.com