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New Message on BDOTNET

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From: jeyank
Message 3 in Discussion

There are three scenarios where this kind of error message will come.
                    one of the case is when using Server.Transfer method.
                        If you are using Server.Transfer method in your web , then 
                                                                                       
                            the following solution could solve your problem.
                                                                                       
                                                                                       
                                            Assume that you are having pages  Page1: 
contains Server.Transfer method ;it points to the URL Page2 ...then
                  Solution: set the second argument of the Server.Transfer method as 
false; That's all.
                Explanation: MAC (Message Authentication Check) on View state will 
fail ( the result of which 
you received this error message), if this second argument set as "True".
why is it so? 
The second argument true means you are trying to pass query string , form field values 
including hidden field _ViewState of Page1 to  Page2.
EnableViewStateMAC(MessageAuthenticationCheck) is defaultly true. meaning MAC will be 
performed on every page (Note:   A view state MAC is an encrypted version the hidden 
variable that a page's view state is persisted to when sent 
to the browser. When you set this attribute to true, the 
encrypted view state is checked to verify that it has not 
been tampered with on the client.)
Naturally MAC will be performed on Page2 also , results in "ViewState Corrupted 
Message".
                                                                                       
                                    because it has got two View States Page1 and Page2 
... :) MAC is designed perform its check on every Page ...  
so The options are either you have to specify EnableViewStateMAC as false(not 
recommened one)
or The second arugment of Server.Transfer as false.



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