I have searched the forum for answer to my problem some sound similar but are not the same, my problem is: (I know this looks a bit long but bear with me!!)

E.g Using MyAccount.aspx (vb version)

When i first built the solution the page ran with out a problem after modifying the site a bit and rebuilding a few times I am getting 'Specified cast is not valid.' When I try to submit changes on MyAccount.aspx.

I understand that PhilePage is Inherited and this types Context.user as the SitePrincipal, which works fine when I first go to MyAccount.aspx (not postback), but fails when I submit.

I put a break point in PhilePage.vb in the Load sub, when I first got to MyAccount.aspx the breakpoint is hit, and context.user is initialized and all is fine. On submit though the breakpoint is not hit and the code fails with the (very annoying!) 'Specified cast is not valid.'

The only way I can solve this is by copying the PhilePage page_load code into top of MyAccount.aspx Page_load.

Has anyone got any suggestions as to why this happens or how I can fix it??

DM2, I am also using the VB version and typing along. Did you find a solution to this problem?

No, I am still getting round the problem by doing what I mentioned at the bottom of my first post. :(

Thanks DM2. I'll try your workaround and if I figure out a solution I'll be sure to post here and let you know.

:-)

DM2, I have also managed to get around this problem by placing a call to MyBase.PhilePage_Load(sender, e) at the start of each page's page_load. This is required because the PhilePage_Load method is firing *after* current page's page_load.

Whilest running the downloaded code of ThePhile with the debugger, I noticed that their PhilePage_Load method is firing *first*. Is there some project/imports/init/etc. setting that would specify that the inherited page's page_load event should fire first?

I think that if we could figure this out, then our problem disappears!

Hey DM2, when you get a chance, can you try the following.

In your PhilePage class, change the following line from:

Private Sub PhilePage_Load(ByVal sender As Object, ByVal e As EventArgs)

to

Protected Sub PhilePage_Load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load

Then comment out the copied in code in say, your MyAccount.aspx.vb file, compile and run and see if it works for you!

/Whoa. Weird formatting!