Hi -



I am working my way through "Beginning ASP.NET using VB.NET". I was 

especially interested in Microsoft's new take on form controls in Chapter 

3. On page 126 there is a page named holidaypage.aspx that is a form page 

that submits info to holidayresponse.aspx, which processes it. The problem 

is that the textbox control that is runat = server must be contained in a 

form that is also runat = server. I looked at the erratta for this book, 

and sure enough, there was some workaround code submitted by Alessandro 

Ansa. His solution was to nest another form with its runat attribute set 

to server within the form that has an action attribute of another page and 

no runat attribute set. 

Apparently the default behavior of an aspx runat = server form is always 

to submit its info to itself. In fact its beyond default, as when I set 

the runat attribute to server and tried to put in an action attribute of a 

second page (which is so very very common in .asp pages) it would not 

accept it and changed the source code to submit it back to itself.



At any rate, I could not get even the supposedly good erratta code to 

work. The first page displayed fine, but when the submit button is 

clicked, it always gives me an error page saying the View_State of the 

second page may be corrupted. I tried copying the code of both pages into 

files with different names, restarting browser, IIS, rebooting computer, 

etc. and I could not get the second page to display. It was always the 

same message:



Server Error in '/' Application.

---------------------------------------------------------------------------

-----



The View State is invalid for this page and might be corrupted. 

Description: An unhandled exception occurred during the execution of the 

current web request. Please review the stack trace for more information 

about the error and where it originated in the code. 



Exception Details: System.Web.HttpException: The View State is invalid for 

this page and might be corrupted.



Source Error: 



An unhandled exception was generated during the execution of the current 

web request. Information regarding the origin and location of the 

exception can be identified using the exception stack trace below.  



Stack Trace: 





[HttpException (0x80004005): The View State is invalid for this page and 

might be corrupted.]

   System.Web.UI.Page.LoadPageStateFromPersistenceMedium() +150

   System.Web.UI.Page.LoadPageViewState() +16

   System.Web.UI.Page.ProcessRequestMain() +421



Any help is appreciated. As I go on in the book, one of the next exercises 

in Chapter 4 builds on this example, so I would like to get some 

resolution.



Thanks,

Dan 

The short answer is to put the following line at the beginning of the

holidayresponse.aspx page.



<%@ Page EnableViewStateMac="false" %>



Doug









-----Original Message-----

From: Dan McKinnon [mailto:mddonna@q...] 

Sent: Sunday, February 24, 2002 4:29 AM

To: aspx_beginners

Subject: [aspx_beginners] View State corrupted





Hi -



I am working my way through "Beginning ASP.NET using VB.NET". I was

especially interested in Microsoft's new take on form controls in

Chapter 3. On page 126 there is a page named holidaypage.aspx that is a

form page that submits info to holidayresponse.aspx, which processes it.

The problem is that the textbox control that is runat = server must be

contained in a form that is also runat = server. I looked at the erratta

for this book, and sure enough, there was some workaround code submitted

by Alessandro Ansa. His solution was to nest another form with its runat

attribute set to server within the form that has an action attribute of

another page and no runat attribute set. Apparently the default behavior

of an aspx runat = server form is always to submit its info to itself.

In fact its beyond default, as when I set the runat attribute to server

and tried to put in an action attribute of a second page (which is so

very very common in .asp pages) it would not accept it and changed the

source code to submit it back to itself.



At any rate, I could not get even the supposedly good erratta code to

work. The first page displayed fine, but when the submit button is

clicked, it always gives me an error page saying the View_State of the

second page may be corrupted. I tried copying the code of both pages

into files with different names, restarting browser, IIS, rebooting

computer, etc. and I could not get the second page to display. It was

always the same message:



Server Error in '/' Application.

------------------------------------------------------------------------

---

-----



The View State is invalid for this page and might be corrupted.

Description: An unhandled exception occurred during the execution of the

current web request. Please review the stack trace for more information

about the error and where it originated in the code.



Exception Details: System.Web.HttpException: The View State is invalid

for this page and might be corrupted.



Source Error:



An unhandled exception was generated during the execution of the current

web request. Information regarding the origin and location of the

exception can be identified using the exception stack trace below.



Stack Trace:





[HttpException (0x80004005): The View State is invalid for this page and

might be corrupted.]

   System.Web.UI.Page.LoadPageStateFromPersistenceMedium() +150

   System.Web.UI.Page.LoadPageViewState() +16

   System.Web.UI.Page.ProcessRequestMain() +421



Any help is appreciated. As I go on in the book, one of the next

exercises in Chapter 4 builds on this example, so I would like to get

some resolution.



Thanks,

Dan

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