Invalid length for a Base-64 char array

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  • Start date Start date
G

Guest

I keep getting this error. I have scoured the web and could not find any
applicable information. It seems to have really started since I upgraded to
the 1.1 framework. Any help is appreciated.

Using:
*ASP.NET 1.1
*Single machine (no clusters)
*Simple postbacks (no postbacks to different pages)
*Using only Response.Redirect() when applicable
*The page works fine. The error appears at random occasions.
*I have not been able to repro the error on my dev machine. It happens only
on my production server.


UNHANDLED Exception:
[FormatException: Invalid length for a Base-64 char array.]
System.Convert.FromBase64String(String s)
System.Web.UI.LosFormatter.Deserialize(String input)
System.Web.UI.Page.LoadPageStateFromPersistenceMedium()

[HttpException: Invalid_Viewstate_Client_Disconnected
Client IP: 204.231.101.39
Port: 1585
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET
CLR 1.1.4322)
ViewState:
***50,369 bytes of base64 text***
Http-Referer: http://198.137.76.44/appman/ManageCustomer.aspx
Path: /appman/ManageCustomer.aspx.]
System.Web.UI.Page.LoadPageStateFromPersistenceMedium()
System.Web.UI.Page.LoadPageViewState()
System.Web.UI.Page.ProcessRequestMain()


User Name: xxxx
SessionID: jqg1cr45bvomc445vefeli45
Form Data:
__EVENTTARGET = "Customers"
__EVENTARGUMENT = ""


Thanks in advance,

Dan
 
Sounds like some of the base64 encoded characters are not making it back to
the server without modification. The same problem occurs when base64
characters are used in a URL. To be used in a URL they have to be URLEncoded,
too.

Try using HTMLEncode() on the base64 data before sending it to the browser.
 
the error is coming from the framework trying to load the __viewstate hidden
field. the common cause for this error, is the viewstate is very large, and
a proxy server is truncating it, causing the error. be sure your length of
your viewstate is under 2k.

-- bruce (sqlwork.com)



| I keep getting this error. I have scoured the web and could not find any
| applicable information. It seems to have really started since I upgraded
to
| the 1.1 framework. Any help is appreciated.
|
| Using:
| *ASP.NET 1.1
| *Single machine (no clusters)
| *Simple postbacks (no postbacks to different pages)
| *Using only Response.Redirect() when applicable
| *The page works fine. The error appears at random occasions.
| *I have not been able to repro the error on my dev machine. It happens
only
| on my production server.
|
|
| UNHANDLED Exception:
| [FormatException: Invalid length for a Base-64 char array.]
| System.Convert.FromBase64String(String s)
| System.Web.UI.LosFormatter.Deserialize(String input)
| System.Web.UI.Page.LoadPageStateFromPersistenceMedium()
|
| [HttpException: Invalid_Viewstate_Client_Disconnected
| Client IP: 204.231.101.39
| Port: 1585
| User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET
| CLR 1.1.4322)
| ViewState:
| ***50,369 bytes of base64 text***
| Http-Referer: http://198.137.76.44/appman/ManageCustomer.aspx
| Path: /appman/ManageCustomer.aspx.]
| System.Web.UI.Page.LoadPageStateFromPersistenceMedium()
| System.Web.UI.Page.LoadPageViewState()
| System.Web.UI.Page.ProcessRequestMain()
|
|
| User Name: xxxx
| SessionID: jqg1cr45bvomc445vefeli45
| Form Data:
| __EVENTTARGET = "Customers"
| __EVENTARGUMENT = ""
|
|
| Thanks in advance,
|
| Dan
 
Bruce,

The puzzle is that things work sometime and not others, so I don't know why
there would be a length limit that takes effect only some times (the exact
same data is being transferred). The large viewstate is the result of a
DropdownList control (I will look into removing the need for viewstate) and
is definitively larger than 2K. Other pages use a DataGrid control with an
even larger viewstate and have this problem only rarely (if at all).

I wonder if "Invalid_Viewstate_Client_Disconnected" is a clue.

Any other thoughts?

Regards,

Dan
 
I'm seeing this error, as well--and it seems to come from thefact that our users will do something that triggers a postback(e.g. select an item from a DropDownList), and then do somethingthat triggers another one, before the first request hasreturned. This seems to truncate the viewstate mid-request, andcause this error.

Anyone have any ideas on how to fix this?
I keep getting this error. I have scoured the web and could notfind any
applicable information. It seems to have really started since Iupgraded to
the 1.1 framework. Any help is appreciated.

Using:
*ASP.NET 1.1
*Single machine (no clusters)
*Simple postbacks (no postbacks to different pages)
*Using only Response.Redirect() when applicable
*The page works fine. The error appears at random occasions.
*I have not been able to repro the error on my dev machine. Ithappens only
on my production server.


UNHANDLED Exception:
[FormatException: Invalid length for a Base-64 char array.]
System.Convert.FromBase64String(String s)
System.Web.UI.LosFormatter.Deserialize(String input)
System.Web.UI.Page.LoadPageStateFromPersistenceMedium()

[HttpException: Invalid_Viewstate_Client_Disconnected
Client IP: 204.231.101.39
Port: 1585
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT5.1; SV1; .NET
CLR 1.1.4322)
ViewState:
***50,369 bytes of base64 text***
Http-Referer:http://198.137.76.44/appman/ManageCustomer.aspx
Path: /appman/ManageCustomer.aspx.]
System.Web.UI.Page.LoadPageStateFromPersistenceMedium()
System.Web.UI.Page.LoadPageViewState()
System.Web.UI.Page.ProcessRequestMain()


User Name: xxxx
SessionID: jqg1cr45bvomc445vefeli45
Form Data:
__EVENTTARGET = "Customers"
__EVENTARGUMENT = ""


Thanks in advance,

Dan
Click to expand...
User submitted from AEWNET (http://www.aewnet.com/)
 
nope, i don't think that is the case. i'm looking into this issue with
microsoft under thread invalid viewstate. if you can reproduce it please
send email to (e-mail address removed) subject line invalid viewstate

--
Regards,
Alvin Bruney - ASP.NET MVP

[Shameless Author Plug]
The Microsoft Office Web Components Black Book with .NET
Now available @ www.lulu.com/owc
I'm seeing this error, as well--and it seems to come from the fact that our
users will do something that triggers a postback (e.g. select an item from a
DropDownList), and then do something that triggers another one, before the
first request has returned. This seems to truncate the viewstate
mid-request, and cause this error.

Anyone have any ideas on how to fix this?
I keep getting this error. I have scoured the web and could not find any
applicable information. It seems to have really started since I upgraded
to
the 1.1 framework. Any help is appreciated.

Using:
*ASP.NET 1.1
*Single machine (no clusters)
*Simple postbacks (no postbacks to different pages)
*Using only Response.Redirect() when applicable
*The page works fine. The error appears at random occasions.
*I have not been able to repro the error on my dev machine. It happens
only
on my production server.


UNHANDLED Exception:
[FormatException: Invalid length for a Base-64 char array.]
System.Convert.FromBase64String(String s)
System.Web.UI.LosFormatter.Deserialize(String input)
System.Web.UI.Page.LoadPageStateFromPersistenceMedium()

[HttpException: Invalid_Viewstate_Client_Disconnected
Client IP: 204.231.101.39
Port: 1585
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET
CLR 1.1.4322)
ViewState:
***50,369 bytes of base64 text***
Http-Referer: http://198.137.76.44/appman/ManageCustomer.aspx
Path: /appman/ManageCustomer.aspx.]
System.Web.UI.Page.LoadPageStateFromPersistenceMedium()
System.Web.UI.Page.LoadPageViewState()
System.Web.UI.Page.ProcessRequestMain()


User Name: xxxx
SessionID: jqg1cr45bvomc445vefeli45
Form Data:
__EVENTTARGET = "Customers"
__EVENTARGUMENT = ""


Thanks in advance,

Dan
Click to expand...
User submitted from AEWNET (http://www.aewnet.com/)
 

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