Hi,

I am having problems running the MyAccount.aspx page. I get an error saying "Specified cast is not valid." for this code:

                Wrox.WebModules.Accounts.Business.User currentUser =
                        new Wrox.WebModules.Accounts.Business.User( (Wrox.WebModules.Accounts.Business.PhilePrincipal) Context.User );

Any ideas ? I am running .NET 1.1

Carin

Hello,

I am developing a site using the book as a guideline and I ran into this as well. The problem (for me at least) is that the Page_Load event runs for the inherited class before it runs for the base site page class...so the Context.User has not been populated with a SitePrincipal before the page attempts to cast it as such.

When I read the chapter on the PhilePage sitewide page class, I did not understand how registering for the Page_Load (in the PhilePage OnInit method) event would guarantee that the base PhilePage_Load would be called first. From my understanding of .NET events, the order in which delegates are called is not specified. So even though the base PhilePage_Load delegate is registered first, it does not necessarily get called first. When I run in the debugger, the Page_Load for the Page is executed before the base PhilePage_Load.

I solved the problem by placing the code from the PhilePage_Load into an override of the PhilePage OnLoad method. I placed the code before a call to the base.OnLoad method to ensure it would execute first.

I do not understand how the code could work as written so I hope someone comments on what guarantees the order of execution of the Page_Load event handlers.

dg

This has been addressed a lot of times here. Changing the order of 2 lines of code in the auto-generated code is all you need to do.
http://p2p.wrox.com/archive/aspdotne.../2002-06/5.asp

I am also getting a similar 'Invalid Cast' message on quite a few of my forms. I have checked that the page load and initialise is in the correct order and I have double checked the article related to this issue that Englere mentioned.
The code in http://p2p.wrox.com/archive/aspdotne.../2002-06/5.asp is for C# and I am using VB.NET, but changed the order of the initialize and myBase.load code anyway. Checked that AutoEventWireUp =false - still get the same error message. How can I resolve the 'Invalid Cast issue' as it is driving me NUTS!

pet.hen

Are you using the code download, or your own code?

I need to authorize the user (check in what groups he belongs to) from the Global.asax.cs file, under event:
Application_AuthorizeRequest(object sender, EventArgs e)

I get a invalid cast when I try to cast the Context.User from this location.

Any suggestions?

You must not be using ThePhile if you're authorizing users there. That's not what the book suggests. You can't change the security model with re-designing the base class.

Eric