Assign value to session in Global.asax

Question

User944339287 posted

Dear all, may i know why HttpContext.Current.Session("pagename") is Nothing?

<%@ Application Language="VB" %>
<%@ Import Namespace="System.Web.Routing" %>

<script runat="server">

    Sub Application_Start(ByVal sender As Object, ByVal e As EventArgs)
        
        ' Code that runs on application startup   
        RegisterRoutes(RouteTable.Routes)
                
    End Sub
       
    Sub Session_Start(ByVal sender As Object, ByVal e As EventArgs)
        ' Code that runs when a new session is started
        HttpContext.Current.Session("pagename") = "microsoft"
    End Sub
   
    Private Shared Sub RegisterRoutes(ByVal routes As RouteCollection)

        Dim pagename As String
        
        If HttpContext.Current IsNot Nothing AndAlso HttpContext.Current.Session IsNot Nothing Then
            pagename = HttpContext.Current.Session("pagename")
        End If
               
        routes.MapPageRoute("home", "home", "~/pages/" + pagename + "/index.aspx")
        
    End Sub

</script>

Answer 1

User475983607 posted

Session is not available at Application_Start. 

Answer 2

User1738843376 posted

use:

Sub Session_Start(ByVal sender As Object, ByVal e As EventArgs)
    HttpContext.Current.Session("pagename") = "microsoft"
End Sub

Answer 3

User753101303 posted

Hi,

Because your code is called from Application_Start and the session is not yet available (Session_Start is triggered AFTER Application_Start). Is this really a per user value? For now hardcoding the value would make no difference and anyway, as far as I know, routing is global to the app.

It could be better to explain what you are trying to do and see how others would do it.

Answer 4

User944339287 posted

Hi,

First of all, I have numbers of child folder under parent folder [pages]

http://localhost/home/ is the only URL users able to browse.

if user A visit http://localhost/home/ , the URL routing will be c:\websites\pages\A\index.aspx

if user B visit http://localhost/home/ , the URL routing will be c:\websites\pages\B\index.aspx

* my web application able to verify who is user A and user B.

Answer 5

User614698185 posted

Hi kengkit,

* my web application able to verify who is user A and user B.

Firstly, get session["UserName"] value in the home.apsx.cs page.

Secondly, add session["UserName"] value to navigation url.

Thirdly, use Response.Redirect to navigate the web page.

For more information, please refer to the following links:

http://stackoverflow.com/questions/21201441/navigateurl-in-asp-net

http://stackoverflow.com/questions/3394031/how-to-include-session-variable-in-navigateurl-in-hyperlink 

Best Regards,

Candice Zhou