C# error System.InvalidCastException

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System.InvalidCastException on following line:

VB

If (System.Threading.Thread.CurrentPrincipal.Identity.IsAuthenticated = False) Then
        CType(System.Threading.Thread.CurrentPrincipal.Identity,
        System.Web.ClientServices.ClientFormsIdentity).RevalidateUser()

Posted 20-Jul-12 3:05am

patelv61

Updated 20-Jul-12 9:00am

ZurdoDev

v2

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StianSandberg 20-Jul-12 9:11am

looks like your System.Threading.Thread.CurrentPrincipal.Identity is null..

patelv61 20-Jul-12 10:04am

Thank you very much.

BobJanova 20-Jul-12 12:21pm

That's not C#, it's VB.

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Sandeep Mewara · Answer 1 · 2012-07-20T09:57:00

I believe you get this error:
Unable to cast object of type 'System.Security.Principal.GenericIdentity' to type 'System.Web.ClientServices.ClientFormsIdentity'

This will occur as long as you are not authenticated. To get the FormsIdentity you need to have been authenticated.
Refer: http://forums.asp.net/t/1114649.aspx/1[^]

Rajesh Buddaraju · Answer 2 · 2012-07-20T11:00:00

The above issue will be
"Unable to cast object of type 'System.Security.Principal.GenericIdentity' to type 'System.Web.ClientServices.ClientFormsIdentity'."

The following thread will also be useful, Check this...
http://www.experts-exchange.com/Programming/Languages/C_Sharp/Q_22592880.html[^]

C# error System.InvalidCastException

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