Disconnect Error

[K B]

I have suddenly begun getting error messages on multiple pages as
follows. I tried researching, but the issue seems quite confusing...or
perhaps just over my head. Could someone please advise what this means
and if there is a way to fix it. I have tried adding
EnableViewstateMAC="false" in the page declaration with no success.
Again, it does not appear to be consistent.
I'm using ASP.NET 2.0 with IE7.

THANKS!
Kit

Application_Error:Error in: http://216.94.25.56/ProductCast.aspx Error
Message: The client disconnected. Exception: System.Web.HttpException:
The client disconnected. ---System.Web.UI.ViewStateException: Invalid
viewstate.
Client IP: 66.152.230.252
Port: 15481
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR
1.1.4322; .NET CLR 2.0.50727)
ViewState:
gWhuGp59Xfm5WTXBD49+g1g3Atf1mx9KGXwGLGF/ZkmSXKvNbsHAM5YFGK+5bBssY1N1hRsM
FwQeIX6BGAXurgSPGV8YRN+4K2TT8KzyWsRzwyH33uDOP/OpVfGxWL/xwYnPH3kgu19h4lFf
1hMvSzGfJw9m07S6UpQU1oEFowhWHOC2h+TdSt4wPuxov1hmZM 1vxPDt8HbWY3TjPnAFEc2x
3LClq/Mp4OWiss5wmYvNXsWzXBzzGl7WlGR5TfTK+vcusyF1bp1ircSN tLDxaDrJE/G84i0J
iZFbZuKiOQ9yyadhqODyKMbT7ELksL0SfOlTEATXrsJrvrY74O 9/0wh8wTgnYHVh0lY7AFi/
sQmF/9m5HoDLf6b+QB/ZgqtfI0oHpXpGI4wbOoqyqEM8uNhBPxmTQI+RJ7tFpju0cPmKw mfN
7pJZVR9Gtj3GuxKEav0CIxDmL0mPP41t2E45hjOB69WIWw0ezA JURNWuiKy2SffCkeJ6de7x
6Gig+Qd0OfDZylBU7hqLsVZevKcYfLlltHs7xQZl/7obp3Z71CEGkVPwusJCvWx+keOjXz91
q4715A6L/LXFz3hkSWQoHzhXQTxcdOstgPMHw0gAclah6ntGh3k5ybxhpgk RNxTX2MnvTVR/
gaYTYlPrVo2GK3qEcKmU1LBz5E2CrRsxRzKa8q0nNAYd8xrvpq Ngu7QslSx6Bu3wqNIKeWZL
eNUXi6AQjYf0xPOsBnMixc/unQ4HF6YjD6xVMpCq7joTYtuxzUFbJjE6/Pf/06IgESW6Ddqu
0OiQImJRSg/P3Wm/rgISsqmwxYqg4YwWpBhPJ4eJ3aMUZg97TnT3HkEsM0c1NmVqQ9 +To...
---System.FormatException: Invalid character in a Base-64 string.
at System.Convert.FromBase64String(String s)
at System.Web.UI.ObjectStateFormatter.Deserialize(Str ing inputString)
at
System.Web.UI.ObjectStateFormatter.System.Web.UI.I StateFormatter.Deseria
lize(String serializedState)
at System.Web.UI.Util.DeserializeWithAssert(IStateFor matter
formatter, String serializedState)
at System.Web.UI.HiddenFieldPageStatePersister.Load()
--- End of inner exception stack trace ---
--- End of inner exception stack trace ---
at System.Web.UI.ViewStateException.ThrowError(Except ion inner,
String persistedState, String errorPageMessage, Boolean
macValidationError)
at System.Web.UI.HiddenFieldPageStatePersister.Load()
at System.Web.UI.Page.LoadPageStateFromPersistenceMed ium()
at System.Web.UI.Page.LoadAllState()
at System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest()
at System.Web.UI.Page.ProcessRequestWithNoAssert(Http Context context)
at System.Web.UI.Page.ProcessRequest(HttpContext context)
at ASP.productcast_aspx.ProcessRequest(HttpContext context)
at
System.Web.HttpApplication.CallHandlerExecutionSte p.System.Web.HttpAppli
cation.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionS tep step,
Boolean& completedSynchronously) Stack Trace: at
System.Web.UI.ViewStateException.ThrowError(Except ion inner, String
persistedState, String errorPageMessage, Boolean macValidationError)
at System.Web.UI.HiddenFieldPageStatePersister.Load()
at System.Web.UI.Page.LoadPageStateFromPersistenceMed ium()
at System.Web.UI.Page.LoadAllState()
at System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest()
at System.Web.UI.Page.ProcessRequestWithNoAssert(Http Context context)
at System.Web.UI.Page.ProcessRequest(HttpContext context)
at ASP.productcast_aspx.ProcessRequest(HttpContext context)
at
System.Web.HttpApplication.CallHandlerExecutionSte p.System.Web.HttpAppli
cation.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionS tep step,
Boolean& completedSynchronously)


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[bruce barker]

there are three steps in saving viewstate

1) serialize to buffer
2) encrypt buffer (prevent hacking) mac address effects this
3) base64 encode buffer (make binary into a 7bit char string)

reading is the reverse. you are getting an error on the base64 decode. a
base64 string has a fixed set of characters (a-z) (A-Z) "+", "/" and
"=". its length must be a multiple of 3.

the error means the viewstate value sent to the browser is not the value
the browser is sending back. a common cause is a proxy server that
truncate the value. if you are sending over 1k of viewstate you should
change you usage of viewstate.
-- bruce (sqlwork.com)

K B wrote:

I have suddenly begun getting error messages on multiple pages as
follows. I tried researching, but the issue seems quite confusing...or
perhaps just over my head. Could someone please advise what this means
and if there is a way to fix it. I have tried adding
EnableViewstateMAC="false" in the page declaration with no success.
Again, it does not appear to be consistent.
I'm using ASP.NET 2.0 with IE7.

THANKS!
Kit

Application_Error:Error in: http://216.94.25.56/ProductCast.aspx Error
Message: The client disconnected. Exception: System.Web.HttpException:
The client disconnected. ---System.Web.UI.ViewStateException: Invalid
viewstate.
Client IP: 66.152.230.252
Port: 15481
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR
1.1.4322; .NET CLR 2.0.50727)
ViewState:
gWhuGp59Xfm5WTXBD49+g1g3Atf1mx9KGXwGLGF/ZkmSXKvNbsHAM5YFGK+5bBssY1N1hRsM
FwQeIX6BGAXurgSPGV8YRN+4K2TT8KzyWsRzwyH33uDOP/OpVfGxWL/xwYnPH3kgu19h4lFf
1hMvSzGfJw9m07S6UpQU1oEFowhWHOC2h+TdSt4wPuxov1hmZM 1vxPDt8HbWY3TjPnAFEc2x
3LClq/Mp4OWiss5wmYvNXsWzXBzzGl7WlGR5TfTK+vcusyF1bp1ircSN tLDxaDrJE/G84i0J
iZFbZuKiOQ9yyadhqODyKMbT7ELksL0SfOlTEATXrsJrvrY74O 9/0wh8wTgnYHVh0lY7AFi/
sQmF/9m5HoDLf6b+QB/ZgqtfI0oHpXpGI4wbOoqyqEM8uNhBPxmTQI+RJ7tFpju0cPmKw mfN
7pJZVR9Gtj3GuxKEav0CIxDmL0mPP41t2E45hjOB69WIWw0ezA JURNWuiKy2SffCkeJ6de7x
6Gig+Qd0OfDZylBU7hqLsVZevKcYfLlltHs7xQZl/7obp3Z71CEGkVPwusJCvWx+keOjXz91
q4715A6L/LXFz3hkSWQoHzhXQTxcdOstgPMHw0gAclah6ntGh3k5ybxhpgk RNxTX2MnvTVR/
gaYTYlPrVo2GK3qEcKmU1LBz5E2CrRsxRzKa8q0nNAYd8xrvpq Ngu7QslSx6Bu3wqNIKeWZL
eNUXi6AQjYf0xPOsBnMixc/unQ4HF6YjD6xVMpCq7joTYtuxzUFbJjE6/Pf/06IgESW6Ddqu
0OiQImJRSg/P3Wm/rgISsqmwxYqg4YwWpBhPJ4eJ3aMUZg97TnT3HkEsM0c1NmVqQ9 +To...
---System.FormatException: Invalid character in a Base-64 string.
at System.Convert.FromBase64String(String s)
at System.Web.UI.ObjectStateFormatter.Deserialize(Str ing inputString)
at
System.Web.UI.ObjectStateFormatter.System.Web.UI.I StateFormatter.Deseria
lize(String serializedState)
at System.Web.UI.Util.DeserializeWithAssert(IStateFor matter
formatter, String serializedState)
at System.Web.UI.HiddenFieldPageStatePersister.Load()
--- End of inner exception stack trace ---
--- End of inner exception stack trace ---
at System.Web.UI.ViewStateException.ThrowError(Except ion inner,
String persistedState, String errorPageMessage, Boolean
macValidationError)
at System.Web.UI.HiddenFieldPageStatePersister.Load()
at System.Web.UI.Page.LoadPageStateFromPersistenceMed ium()
at System.Web.UI.Page.LoadAllState()
at System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest()
at System.Web.UI.Page.ProcessRequestWithNoAssert(Http Context context)
at System.Web.UI.Page.ProcessRequest(HttpContext context)
at ASP.productcast_aspx.ProcessRequest(HttpContext context)
at
System.Web.HttpApplication.CallHandlerExecutionSte p.System.Web.HttpAppli
cation.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionS tep step,
Boolean& completedSynchronously) Stack Trace: at
System.Web.UI.ViewStateException.ThrowError(Except ion inner, String
persistedState, String errorPageMessage, Boolean macValidationError)
at System.Web.UI.HiddenFieldPageStatePersister.Load()
at System.Web.UI.Page.LoadPageStateFromPersistenceMed ium()
at System.Web.UI.Page.LoadAllState()
at System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest()
at System.Web.UI.Page.ProcessRequestWithNoAssert(Http Context context)
at System.Web.UI.Page.ProcessRequest(HttpContext context)
at ASP.productcast_aspx.ProcessRequest(HttpContext context)
at
System.Web.HttpApplication.CallHandlerExecutionSte p.System.Web.HttpAppli
cation.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionS tep step,
Boolean& completedSynchronously)


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[K B]

Thank you, Bruce. I am using a dedicated host server. Can I change the
setting to not truncate the viewstate? If so, could you please point me
in the right direction?

Also, what is the alternative for viewstate? For example, a gridview
upon postback. How would I keep that current? I'm not sure the less than
1K is feasible for my purposes...but its clear you know much more than I
about this. Would you mind giving me more information?

Thanks again!
Kit
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