Base Page class - Request.Cookies

[Shawn Berg]

Some of my pages in the app I am developing inherit from a BasePage class I
have created. I have done plenty of these in the past and they work fine.
Now, however, I have an additional requirement.

In my BasePage class I need to check the user's browser for a particular
cookie, and if certain conditions aren't met, redirect the user to another
page. You can see the code for my BasePage class below. The problem lies in
the LoggedIn function. I am getting the error
"System.NullRef erenceException : Object reference not set to an instance of
an object" on the first line of that function. Any ideas?

Public Class SecureAdminBase Page
Inherits System.Web.UI.P age

Protected Overrides Sub OnInit(ByVal e As System.EventArg s)
Me.Controls.Add At(0,
LoadControl("/UserControls/SecureAdminHead er.ascx"))
MyBase.OnInit(e )
Me.Controls.Add (LoadControl("/UserControls/SecureAdminFoot er.ascx"))
End Sub

Private Function LoggedIn()
If Not MyBase.Request. Cookies("TSRAdm in").Value.ToSt ring = "TRUE" _
Or Not IsNumeric(MyBas e.Request.Cooki es("au_id").Val ue.ToString)
Then
Return False
Else
Return True
End If
End Function

Protected Overrides Sub OnLoad(ByVal e As System.EventArg s)
MyBase.OnLoad(e )

'Be sure user is logged in
If Not LoggedIn() Then
Response.Redire ct("/admin/login/")
End If
End Sub

End Class

[Hussein Zahran]

Hi Shawn
All you will need is to check if the cookie already exists or not like this
If Not MyBase.Request. Cookies("TSRAdm in") is Nothing then
If Not MyBase.Request. Cookies("TSRAdm in").Value.ToSt ring = "TRUE" _
Or Not IsNumeric(MyBas e.Request.Cooki es("au_id").Val ue.ToString)
Then
Return False
Else
Return True
End If
Else
Return False
End If
i hope this works

"Shawn Berg" wrote:

Some of my pages in the app I am developing inherit from a BasePage class I
have created. I have done plenty of these in the past and they work fine.
Now, however, I have an additional requirement.

In my BasePage class I need to check the user's browser for a particular
cookie, and if certain conditions aren't met, redirect the user to another
page. You can see the code for my BasePage class below. The problem lies in
the LoggedIn function. I am getting the error
"System.NullRef erenceException : Object reference not set to an instance of
an object" on the first line of that function. Any ideas?

Public Class SecureAdminBase Page
Inherits System.Web.UI.P age

Protected Overrides Sub OnInit(ByVal e As System.EventArg s)
Me.Controls.Add At(0,
LoadControl("/UserControls/SecureAdminHead er.ascx"))
MyBase.OnInit(e )
Me.Controls.Add (LoadControl("/UserControls/SecureAdminFoot er.ascx"))
End Sub

Private Function LoggedIn()
If Not MyBase.Request. Cookies("TSRAdm in").Value.ToSt ring = "TRUE" _
Or Not IsNumeric(MyBas e.Request.Cooki es("au_id").Val ue.ToString)
Then
Return False
Else
Return True
End If
End Function

Protected Overrides Sub OnLoad(ByVal e As System.EventArg s)
MyBase.OnLoad(e )

'Be sure user is logged in
If Not LoggedIn() Then
Response.Redire ct("/admin/login/")
End If
End Sub

End Class

[Shawn Berg]

Hussein,

Your suggestion has definitely help me resolve this problem. Thanks.

I am still experiencing one oddity, however. The cookies I am trying to read
in ASP.NET are being set by classic ASP pages. In order to read the cookie
in ASP.NET I have to "URLEncode" the cookie's name manually, like so:

Request.Cookies ("au%5Fid")

When I use the following ASP.NET cannot find the cookie:

Request.Cookies ("au_id")

Is this a known problem with reading cookies written by classic ASP pages?

Shawn

"Hussein Zahran" <Hu***********@ discussions.mic rosoft.com> wrote in message
news:E3******** *************** ***********@mic rosoft.com...

Hi Shawn
All you will need is to check if the cookie already exists or not like
this
If Not MyBase.Request. Cookies("TSRAdm in") is Nothing then
If Not MyBase.Request. Cookies("TSRAdm in").Value.ToSt ring = "TRUE" _
Or Not IsNumeric(MyBas e.Request.Cooki es("au_id").Val ue.ToString)
Then
Return False
Else
Return True
End If
Else
Return False
End If
i hope this works

"Shawn Berg" wrote:

Some of my pages in the app I am developing inherit from a BasePage class
I
have created. I have done plenty of these in the past and they work fine.
Now, however, I have an additional requirement.

In my BasePage class I need to check the user's browser for a particular
cookie, and if certain conditions aren't met, redirect the user to
another
page. You can see the code for my BasePage class below. The problem lies
in
the LoggedIn function. I am getting the error
"System.NullRef erenceException : Object reference not set to an instance
of
an object" on the first line of that function. Any ideas?

Public Class SecureAdminBase Page
Inherits System.Web.UI.P age

Protected Overrides Sub OnInit(ByVal e As System.EventArg s)
Me.Controls.Add At(0,
LoadControl("/UserControls/SecureAdminHead er.ascx"))
MyBase.OnInit(e )
Me.Controls.Add (LoadControl("/UserControls/SecureAdminFoot er.ascx"))
End Sub

Private Function LoggedIn()
If Not MyBase.Request. Cookies("TSRAdm in").Value.ToSt ring = "TRUE" _
Or Not IsNumeric(MyBas e.Request.Cooki es("au_id").Val ue.ToString)
Then
Return False
Else
Return True
End If
End Function

Protected Overrides Sub OnLoad(ByVal e As System.EventArg s)
MyBase.OnLoad(e )

'Be sure user is logged in
If Not LoggedIn() Then
Response.Redire ct("/admin/login/")
End If
End Sub

End Class