forms identity problem

[Darin Shaw]

I'm receiving a "specified cast is invalid" with the following code, though
I've used the exact same code in other applications with success. Can anyone
tell me what I'm missing or if there are other factors to be considered
here?
Thanks in advance.

========
Private Sub Page_Load(ByVal sender as System.Object, ByVal e as
System.EventArgs) Handles MyBase.Load

Dim objFormsID as FormsIdentity
objFormsID = User.Identity <=== specified cast
invalid
....
End Sub
========

[John Saunders]

"Darin Shaw" <da*******@iqmetrix.com> wrote in message
news:O5**************@TK2MSFTNGP09.phx.gbl...

I'm receiving a "specified cast is invalid" with the following code, though I've used the exact same code in other applications with success. Can anyone tell me what I'm missing or if there are other factors to be considered
here?
Thanks in advance.

========
Private Sub Page_Load(ByVal sender as System.Object, ByVal e as
System.EventArgs) Handles MyBase.Load

Dim objFormsID as FormsIdentity
objFormsID = User.Identity <=== specified cast
invalid

So, I guess User.Identity is not a FormsIdentity.
--
John

[Darin Shaw]

As that reply was quite unhelpful, perhaps I have not been clear enough.
I'm curious as to why this code is used successfully in text books and has
worked in other web applications of mine, but does not work in this one. Can
anyone offer any insight as to what criteria must be met for this cast to be
made, or why this would incur the stated runtime error in one case but not
another?
Thanks in advance.

"John Saunders" <john.saunders at surfcontrol.com> wrote in message
news:Oc****************@TK2MSFTNGP11.phx.gbl...

"Darin Shaw" <da*******@iqmetrix.com> wrote in message
news:O5**************@TK2MSFTNGP09.phx.gbl...

I'm receiving a "specified cast is invalid" with the following code,

though

I've used the exact same code in other applications with success. Can

anyone

tell me what I'm missing or if there are other factors to be considered
here?
Thanks in advance.

========
Private Sub Page_Load(ByVal sender as System.Object, ByVal e as
System.EventArgs) Handles MyBase.Load

Dim objFormsID as FormsIdentity
objFormsID = User.Identity <=== specified cast
invalid

So, I guess User.Identity is not a FormsIdentity.
--
John

[John Saunders]

Because in your instance, User.Identity does not reference a FormsIdentity,
but rather some other type of object. I recommend you use the debugger to
find out what kind of object it is. If you'd rather not, try
Response.Write(User.Identity.GetType().FullName), and put a REM in front of
the line which fails.

If this question is still not helpful, perhaps you could tell us what part
of it you don't understand.

--
John

"Darin Shaw" <da*******@iqmetrix.com> wrote in message
news:#$*************@TK2MSFTNGP10.phx.gbl...

As that reply was quite unhelpful, perhaps I have not been clear enough.
I'm curious as to why this code is used successfully in text books and has
worked in other web applications of mine, but does not work in this one. Can anyone offer any insight as to what criteria must be met for this cast to be made, or why this would incur the stated runtime error in one case but not
another?
Thanks in advance.

"John Saunders" <john.saunders at surfcontrol.com> wrote in message
news:Oc****************@TK2MSFTNGP11.phx.gbl...

"Darin Shaw" <da*******@iqmetrix.com> wrote in message
news:O5**************@TK2MSFTNGP09.phx.gbl...

I'm receiving a "specified cast is invalid" with the following code,

though

I've used the exact same code in other applications with success. Can

anyone

tell me what I'm missing or if there are other factors to be considered here?
Thanks in advance.

========
Private Sub Page_Load(ByVal sender as System.Object, ByVal e as
System.EventArgs) Handles MyBase.Load

Dim objFormsID as FormsIdentity
objFormsID = User.Identity <=== specified cast
invalid

So, I guess User.Identity is not a FormsIdentity.
--
John

[Darin Shaw]

I know what type it is. It's an IIdentity.
My question was, and is, why it is able to cast an IIdentity to the
FormsIdentity variable in some cases, but not others.

"John Saunders" <john.saunders at surfcontrol.com> wrote in message
news:O2**************@tk2msftngp13.phx.gbl...

Because in your instance, User.Identity does not reference a FormsIdentity, but rather some other type of object. I recommend you use the debugger to
find out what kind of object it is. If you'd rather not, try
Response.Write(User.Identity.GetType().FullName), and put a REM in front of the line which fails.

If this question is still not helpful, perhaps you could tell us what part
of it you don't understand.

--
John

"Darin Shaw" <da*******@iqmetrix.com> wrote in message
news:#$*************@TK2MSFTNGP10.phx.gbl...

As that reply was quite unhelpful, perhaps I have not been clear enough.
I'm curious as to why this code is used successfully in text books and has

worked in other web applications of mine, but does not work in this one. Can

anyone offer any insight as to what criteria must be met for this cast to be

made, or why this would incur the stated runtime error in one case but

not another?
Thanks in advance.

"John Saunders" <john.saunders at surfcontrol.com> wrote in message
news:Oc****************@TK2MSFTNGP11.phx.gbl...

"Darin Shaw" <da*******@iqmetrix.com> wrote in message
news:O5**************@TK2MSFTNGP09.phx.gbl...
> I'm receiving a "specified cast is invalid" with the following code,
though
> I've used the exact same code in other applications with success. Can anyone
> tell me what I'm missing or if there are other factors to be

considered > here?
> Thanks in advance.
>
> ========
> Private Sub Page_Load(ByVal sender as System.Object, ByVal e as
> System.EventArgs) Handles MyBase.Load
>
> Dim objFormsID as FormsIdentity
> objFormsID = User.Identity <=== specified cast > invalid

So, I guess User.Identity is not a FormsIdentity.
--
John

[John Saunders]

"Darin Shaw" <da*******@NOSPAMiqmetrix.com> wrote in message
news:#2*************@TK2MSFTNGP10.phx.gbl...

I know what type it is. It's an IIdentity.
My question was, and is, why it is able to cast an IIdentity to the
FormsIdentity variable in some cases, but not others.
No, you don't know.

IIdentity is an interface. Many different classes implement IIdentity.
FormsIdentity is only one of them. GenericIdentity and WindowsIdentity are
others. Neither of the latter two are the same as FormsIdentity, so neither
can be cast to FormsIdentity.

For some reason, you're getting a different type of authentication than you
had intended. You need to follow my suggestion and either look at
User.Identity in the debugger, or write it out with Response.Write.
--
John

"John Saunders" <john.saunders at surfcontrol.com> wrote in message
news:O2**************@tk2msftngp13.phx.gbl...

Because in your instance, User.Identity does not reference a

FormsIdentity,

but rather some other type of object. I recommend you use the debugger to

find out what kind of object it is. If you'd rather not, try
Response.Write(User.Identity.GetType().FullName), and put a REM in front

of

the line which fails.

If this question is still not helpful, perhaps you could tell us what part of it you don't understand.

--
John

"Darin Shaw" <da*******@iqmetrix.com> wrote in message
news:#$*************@TK2MSFTNGP10.phx.gbl...

As that reply was quite unhelpful, perhaps I have not been clear enough. I'm curious as to why this code is used successfully in text books and has worked in other web applications of mine, but does not work in this one. Can

anyone offer any insight as to what criteria must be met for this cast to

be

made, or why this would incur the stated runtime error in one case but

not another?
Thanks in advance.

"John Saunders" <john.saunders at surfcontrol.com> wrote in message
news:Oc****************@TK2MSFTNGP11.phx.gbl...
> "Darin Shaw" <da*******@iqmetrix.com> wrote in message
> news:O5**************@TK2MSFTNGP09.phx.gbl...
> > I'm receiving a "specified cast is invalid" with the following

code, > though
> > I've used the exact same code in other applications with success.

Can > anyone
> > tell me what I'm missing or if there are other factors to be

considered

> > here?
> > Thanks in advance.
> >
> > ========
> > Private Sub Page_Load(ByVal sender as System.Object, ByVal e as
> > System.EventArgs) Handles MyBase.Load
> >
> > Dim objFormsID as FormsIdentity
> > objFormsID = User.Identity <=== specified cast > > invalid
>
> So, I guess User.Identity is not a FormsIdentity.
> --
> John
>
>