Viewstate support in Mac IE5

[Lau Lei Cheong]

Hello,

It turns out that some of my website's visitors are using MSIE 5.X for
Mac, and they frequently suffers from the "Invalid viewstate" exception(The
exception is not recorded on other browsers, so may be IE for Mac specific
problem). The following is a sample of returned report(I implemented email
notification on exception):

System.Web.HttpUnhandledException: Exception of type
System.Web.HttpUnhandledException was thrown. ---> System.Web.HttpException:
Invalid_Viewstate
Client IP: XXX.XXX.XXX.XX
Port: 6255
User-Agent: Mozilla/4.0 (compatible; MSIE 5.16; Mac_PowerPC)
ViewState:
[deleted]
System.Web.HttpException: Authentication of viewstate failed. 1) If this is
a cluster, edit <machineKey> configuration so all servers use the same
validationKey and validation algorithm. AutoGenerate cannot be used in a
cluster. 2) Viewstate can only be posted back to the same page. 3) The
viewstate for this page might be corrupted. ---> System.Web.HttpException:
Unable to validate data.

Please note that the website is hosted on single server.

Is there ayway I can help them get rid of the exception? I don't want to
turn off the viewstate check as they're really good in protecting the site
from sproofing.

Yours,
Lau Lei Cheong

 

[Guest]

Hi,

try by setting enableViewStateMac="False" in the page directive explicitly

cheers,

Jerome. M

Hello,

It turns out that some of my website's visitors are using MSIE 5.X for
Mac, and they frequently suffers from the "Invalid viewstate" exception(The
exception is not recorded on other browsers, so may be IE for Mac specific
problem). The following is a sample of returned report(I implemented email
notification on exception):

System.Web.HttpUnhandledException: Exception of type
System.Web.HttpUnhandledException was thrown. ---> System.Web.HttpException:
Invalid_Viewstate
Client IP: XXX.XXX.XXX.XX
Port: 6255
User-Agent: Mozilla/4.0 (compatible; MSIE 5.16; Mac_PowerPC)
ViewState:
[deleted]
System.Web.HttpException: Authentication of viewstate failed. 1) If this is
a cluster, edit <machineKey> configuration so all servers use the same
validationKey and validation algorithm. AutoGenerate cannot be used in a
cluster. 2) Viewstate can only be posted back to the same page. 3) The
viewstate for this page might be corrupted. ---> System.Web.HttpException:
Unable to validate data.

Please note that the website is hosted on single server.

Is there ayway I can help them get rid of the exception? I don't want to
turn off the viewstate check as they're really good in protecting the site
from sproofing.

Yours,
Lau Lei Cheong

 

[Lau Lei Cheong]

Oh, I see.

The MSDN doesn't seem to document this property very well, just say that "it
is not intended to be used directly from your code" without further
specifying the reasons.

Hi,

try by setting enableViewStateMac="False" in the page directive explicitly

cheers,

Jerome. M

Hello,

It turns out that some of my website's visitors are using MSIE 5.X for
Mac, and they frequently suffers from the "Invalid viewstate" exception(The
exception is not recorded on other browsers, so may be IE for Mac specific
problem). The following is a sample of returned report(I implemented email
notification on exception):

System.Web.HttpUnhandledException: Exception of type
System.Web.HttpUnhandledException was thrown. ---> System.Web.HttpException:
Invalid_Viewstate
Client IP: XXX.XXX.XXX.XX
Port: 6255
User-Agent: Mozilla/4.0 (compatible; MSIE 5.16; Mac_PowerPC)
ViewState:
[deleted]
System.Web.HttpException: Authentication of viewstate failed. 1) If this is
a cluster, edit <machineKey> configuration so all servers use the same
validationKey and validation algorithm. AutoGenerate cannot be used in a
cluster. 2) Viewstate can only be posted back to the same page. 3) The
viewstate for this page might be corrupted. ---> System.Web.HttpException:
Unable to validate data.

Please note that the website is hosted on single server.

Is there ayway I can help them get rid of the exception? I don't want to
turn off the viewstate check as they're really good in protecting the site
from sproofing.

Yours,
Lau Lei Cheong