State Management :: Invalid Character In A Base-64 String?
May 15, 2010
My application is very big one. I m getting this error. I dont know where it is throwing.
I m unable to find this error. Can anyone help me and tell me the scenarios when will this exception comes.
The Stack Trace is throwing this message
System.Convert.FromBase64String(String s) at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) at System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Deserialize(String serializedState) at System.Web.UI.Util.DeserializeWithAssert(IStateFormatter
formatter, String serializedState) at System.Web.UI.HiddenFieldPageStatePersister.Load()
I'm having trouble getting a form working with MVC2. As soon as I change the form element to use 'enctype="multipart/form-data"' I get errors when submitting it. The code I've got creating the form is as follows:
[Code]....
With several form text field and a file upload being the only fields. Nothing too complicated!The action method that handles the form submission is as follows:
[Code]....
It's nothing too complicated either. The code that I've commented out would have inserted the image into the database, but I commented it out to see if it was causing the problem, but it's not.The error I'm getting is as follows:
Server Error in '/' Application.
Invalid character in a Base-64 string.
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.FormatException: Invalid character in a Base-64 string.Source Error: [Code]....
Stack Trace: [Code]....
Version Information: Microsoft .NET Framework Version:2.0.50727.4927; ASP.NET Version:2.0.50727.4927
Obviously something is going terribly wrong here, but I'm at a complete loss as to what it is. The form works fine if I get rid of the multipart bit in the form element, but then of course it doesn't upload the image. I also get the error regardless of whether I've actually selected an image to upload, so it's not the actual image causing the error.
I found this code on this site in another thread and tried it. I am passing a string of a web url such as [URL] .... and it gives me this error. How can I pass in the URL without this error?
Code: Private Sub saveURLToImage(ByVal url As String) If Not String.IsNullOrEmpty(url) Then Dim content As String = "" Dim webRequest__1 As System.Net.WebRequest = WebRequest.Create(url) Dim webResponse As System.Net.WebResponse = webRequest__1.GetResponse()
I am getting this error while executing my Asp.Net application.i am not able to execute application using Visual Studio Interface and when i am trying to execute application from Local IIS. its executing well but when i am trying to click any button for searching etc it is giving this error. The state information is invalid for this page and might be corrupted. The detailed information is
[Code]....
[FormatException: Invalid character in a Base-64 string.] System.Convert.FromBase64String(String s) +0 System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) +72 System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Deserialize(String serializedState) +4 System.Web.UI.Util.DeserializeWithAssert(IStateFormatter formatter, String serializedState) +37 System.Web.UI.HiddenFieldPageStatePersister.Load() +113[ViewStateException: Invalid viewstate. Client IP: 127.0.0.1Port: 1307User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/532.5 (KHTML, like Gecko) Chrome/4.1.249.1064 Safari/532.5ViewState: 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...][HttpException (0x80004005): The state information is invalid for this page and might be corrupted.] System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError) +106 System.Web.UI.ViewStateException.ThrowViewStateError(Exception inner, String persistedState) +14 System.Web.UI.HiddenFieldPageStatePersister.Load() +217 System.Web.UI.Page.LoadPageStateFromPersistenceMedium() +105 System.Web.UI.Page.LoadAllState() +43 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +6785 System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +242 System.Web.UI.Page.ProcessRequest() +80 System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +21 System.Web.UI.Page.ProcessRequest(HttpContext context) +49 ASP.pages__cmtickets_cmtickets_reports_cmtickets_search_aspx.ProcessRequest(HttpContext context) in c:WINDOWSMicrosoft.NETFrameworkv2.0.50727Temporary ASP.NET Filesapp_mobily_alexmare1eddc658e6f2ba5App_Web_b9acfmsy.14.cs:0 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +181 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75 Version Information: Microsoft .NET Framework Version:2.0.50727.3603; ASP.NET Version:2.0.50727.3082
I am getting this error "The session state information is invalid and might be corrupted " as i hve checked all my session variable initialized with some default value and the existing code works fine in version 1.1 but on conversion it is giving specified error. The error comes when i simply click on a link to redirect to some other page.
I am having this problem with, it seems, Viewstate. This issue only occurs on certain machines, if I browse the website myself it works fine but if another user browses the pages they will lock up and timeout with the error "Viewstate verification failed. Reason: Viewstate was invalid." appering in the event log. Full error is as follows:
System.InvalidCastException was unhandled by user code
Message=Specified cast is not valid.
Source=App_Web_donate.aspx.cdcab7d2.wqdohvu3 StackTrace: at Donate.LoadUserDetails() in C:UsersSimonDesktopLocal SitesCats ProtectionNewDonate.aspx.vb:line 261 at Donate.btnDonate30_Click(Object sender, EventArgs e) in C:UsersSimonDesktopLocal SitesCats ProtectionNewDonate.aspx.vb:line 205 at System.Web.UI.WebControls.LinkButton.OnClick(EventArgs e) at System.Web.UI.WebControls.LinkButton.RaisePostBackEvent(String eventArgument) at System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
InnerException: I have made the important bits Bold I have the following code which is generating this error:
[Code]....
I am not entirely sure what is causing it. Its completley intermitent. I am storing all the details of a user filling in a form in a structure, and then assigning that structure to a session variable. This means if they page back, and then page forward again, I can pre-populate the form with the details they have already filled in for their conveinience by using the above code snippet. It appears that it works for a good minute, but if I leave the browser alone any longer than roughly 60 seconds, and then try and page forward to the form again, the exception will fire. While writing this post, the exception has occured in again in firefox, but interestingly, Google Chrome doesn't seem to have this problem. It looks like I can leave chrome alone for as long as I want and it will still work.
Iam very new to this forums as well as ASP dot Net...i was succesful to write this code in 3 to 4 ways but im not getting using the below method.
here it goes...
Task Name : Disable User Name after 3 invalid Password Attempts using "SESSIONS" & "VIEW STATE" with SQL Server as Database i want code in "C#"
In Detail :
When i Enter a User name and Password correctly and click Login it will Re-Direct to Destination Page.
But when i enter same User Name but invalid password 3 times then the user name should be blocked (After The User Name has been blocked the user will send an email to Admin that my user name has been blocked so Reset etc etc and the Admin will Reset The new Password)
Here Create the User Name & Password In SQL Table Directly. As We give the user name & password to users...also create another column in Table for an integer so that when it hits to 3 it should block the user name and also another column for status.
For Counting the values till 3 donot use static integers..instead use SESSIONS also use VIEWSTATE
Is there a good way to test and debug these errors. I constantly get them emailed to me from my production site but I can not duplicate them. Below is the entire error.
User: jbrown IP: 74.202.255.133 Session[STUser] = DAL.stUser Session[PlaylistName] = Adult Contemporary Holiday Blend 2010 (vol. 2) Session[PlaylistId] = 3865 Session[SES-FAN] = SessionFan Session[fullPreview] = yes System.ArgumentException: Invalid postback or callback argument. Event validation is enabled using in configuration or <%@ Page EnableEventValidation="true" %>in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager. RegisterForEventValidation method in order to register the postback or callback data for validation. at System.Web.UI.ClientScriptManager.ValidateEvent(String uniqueId, String argument) at System.Web.UI.WebControls.LinkButton.RaisePostBackEvent(String eventArgument) at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) Exception of type 'System.Web.HttpUnhandledException' was thrown. System.Web at System.Web.UI.Page.HandleError(Exception e) 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.ProcessRequest(HttpContext context) at ASP.brandbrowse_aspx.ProcessRequest(HttpContext context) in c:WindowsMicrosoft.NETFramework64v2.0.50727Temporary ASP.NET Files oote6fbb3019956ec5aApp_Web_u-x9w715.8.cs:line 0 at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
I work on an ASP.Net 4 project that uses forms authentication.The majority of our users login without any trouble, however, something strange is happening with a small number of users and I think we've narrowed it done to the User Agent string.Most users when logged in will see a fairly standard looking URL, e.g. http://mywebsite.co.uk/Web/Pages/Default.aspx, the "web" folder is the root of the site.
Some users when logged in are producing URLs such as
http://mywebsite.co.uk/Web/(F(wjNTtmLFYK3PyAUD09idKtZcyRPlf3Mlc6_rJMMwd1r0EvxeL1ROKYoTbd6KQWJNJHebiCs8qN4laZAItib4ZmcfMy75KhGlBrMCjY-47phUNQiJ_Q0-E3ntvf8tscjxfD5A0lVXau-UxDvN6gTgW1TkwhA1))/Pages/Default.aspx. I can only assume the garbage characters are some sort of session identifier string.
These obscure, long URLs work fine for some pages, but a lot of pages (including our home page) use the LoadControl(path) method to dynamic load content, or have hyperlinks to static files on the server (e.g. PDFs). In these scenarios the users with the long URLs crash the application as obviously the files it's looking for don't exist because the paths have been obscured with garbage characters.
We can reproduce this error by using masking the User Agent in Firefox to emulate the Googlebot, and sometimes the iPhone. Is there a particular reason why some user agents will produce this behaviour? Can anyone shed any light at all on why the random string is being injected into every URL on our sites?
Example scenario: User login has a list of associated 'accounts' it has access to... this list of accounts is stored in a database table, say tblAccountAccessControl, something like:
This info is used throughout the web application and determines the 'domain' of information the particular login has access to. For example there are many other tables that have the 'accountID' field and whenever a page pulls data from the table it only pulls data that the currently logged in user should be allowed to see, based on that tblAccountAccessControl data.
The security question: Do I need to query the database every time I need to get this list of allowed accountID's? I was about to use a plain old query string to pass a particular accountID to another page but quickly caught myself as I realized that would be a major security flaw (the receiving page was going to use that accountID to grab info from the database, and there would be nothing preventing a user from simply typing in a url manually to get data from an accountID they are not supposed to be allowed to view). So I then thought I'll just store the list of accountID's in a session state variable so they will be carried with the user throughout the session.
But then I remembered there are tools out there that allow you to easily intercept and modify asp.net viewstate information and I'm not sure if that would included session state variables, but I'm guessing they would. Is there a way to create a secure query string? If I used session state would that session state information be exposed and modifyable by utilities out there? Am I just stuck having to query the database every time I need this info to assure security? What about encrypting it and then storing in session state variable (just thought of that one)?
I created three web pages: Page1, Page2, Page3. In Page1, two variables(Var1, Var2) were stored by subkeys(Key1, Key2) in a single cookie. After storing, Page1 was redirected to Page2 by Server.Transfer() as the following code:
If Cookies("MyCookie") isn't rewritten by other code, it should return Var1 ~ Var5 respectively to execute Request.Cookies("MyCookie")("Key1") ~ Request.Cookies("MyCookie")("Key5") in Page3. However... Strange things happened, Var1 and Var2 were not returned, but empty string are returned instead.
I have a query string which contains the value of more than one Array, I want to pass these values from Page 1 to Page 2 and then distribute the array values into new arrays on Page 2.
Here is what I have so far.
Page 1
[Code]....
[Code]....
Page 2
[Code]....
All that I get returned in EFFinal and IFFinal is System.String?
Description: An error occurred during the parsing of a resource required to service this request. review the following specific parse error details and modify your source file appropriately.
i have a scenario where i have to remove the invalid character from price using c# code.i want the regular ex to remove the character or some thing good then this.
For Ex- my price is "3,950,000 ( Ex. TAX )"
i want to remove "( Ex. TAX )" from the price.my scenario is that. i have to remove the any character from string except number,dot(.), and comma(,)
I need to keep a global variable throughout the whole time the user is at my site, but do I use Application or a static class? The string variable should store a region name and my site makes a few changes depending on which region that has been set.
I read that Application was mainly for classic ASP, but I also read that a static class cannot be instantiated at runtime (e.g. when the user has logged in).
So, have I got something wrong here and which solution do I use?
I only made 1 other dynamic page before, without users. I do remember I setup a read-only user to the database and that was the user used in the connection string, simple.
In managing multiple users, does asp.net's membership & roles automatically switch up the databases connection string upon login? Do you setup hypothetical "groups" of user access permissions in your database (mysql) then associate that user to that group in membership & roles?
I'm just looking for a general idea of what to expect before I start reading.
