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• How would you validate a checkbox in ASP.Net MVC 2?

  - by Scott Mayfield

  Using MVC2, I have a simple ViewModel that contains a bool field that is rendered on the view as a checkbox. I would like to validate that the user checked the box. The [Required] attribute on my ViewModel doesn't seem to do the trick. I believe this is because the unchecked checkbox form field is not actually transmitted back during the POST, and therefore the validation doesn't run on it. Is there a standard way to handle checkbox "required" validation in MVC2? or do I have to write a custom validator for it? I suspect the custom validator won't get executed either for the reason mentioned above. Am I stuck checking for it explicitly in my controller? That seems messy... Any guidance would be appreciated. Scott

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• Java JMS = HornetQ = javax.jms.JMSSecurityException: Unable to validate user: null ?

  - by jens

  Hello Experts, I am trying for several hours to get the HornetQ Examples running in Eclipse. Using the Standalone Examples everything works fine, but when I run the examples in Eclipse I get the following error: javax.jms.JMSSecurityException: Unable to validate user: null What could this error mean? Where do I have to specify the user? Maybe HornetQ tries to look this user up in "Some Context/Properties" etc , but I do not know where and how to specifiy the user HornetQ is running under. What i did: 1.)Started Default HornetQ Server with the start.sh Script in the ./bin directory 2.)Copied the QueueExample over to eclpise 3.)Did some minor changes in the config files (to have the same Queue Names...) (I also tried to disable security completely by setting: <security-enabled>false</security-enabled> but with no success, always getting the same error. Also when trying to programmatically instance HornetQ only via classes I get this error too). Thank you very much!! Jens

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• In MVC2, how do I validate fields that aren't in my data model?

  - by Andy Evans

  I am playing with MVC2 in VS 2010 and am really getting to like it. In a sandbox application that I've started from scratch, my database is represented in an ADO.NET entity data model and have done much of the validation for fields in my data model using Scott Guthrie's "buddy class" approach which has worked very well. However, in a user registration form that I have designed and am experimenting with, I'd like to add a 'confirm email address' or a 'confirm password' field. Since these fields obviously wouldn't exist in my data model, how would I validate these fields client side and server side? I would like to implement something like 'Html.ValidationMessageFor', but these fields don't exist in the data model. Any help would be greatly appreciated.

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• URL valid characters. java to validate.

  - by Chez

  a string like: 'www.test.com' is good. a string like: 'www.888.com' is good. a string like: 'stackoverflow.com' is good. a string like: 'GOoGle.Com' is good. why ? because those are valid urls. it does not necessarely matter if they have been registered or not. now bad strings are: 'goog*d\x' 'manydots...com' why because you can't register those urls. if I have a string in java which is supposed to be a good url what's the best way to validate it ? thanks a lot

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• What is the fastest way to validate that a field has no more than n words?

  - by James A. Rosen

  I have a Ruby-on-Rails model: class Candidate < ActiveRecord::Base validates_presence_of :application_essay validate :validate_length_of_application_essay protected def validate_length_of_application_essay return if application_essay.blank? # don't add a second error message if they didn't fill it out errors.add(:application_essay, :too_long), unless ... end end Without dropping into C, what is the fastest way to check that the application_essay contains no more than 500 words? You can assume that most essays will be at least 200 words, are unlikely to be more than 5000 words, and are in English (or the pseudo-English sometimes called "business-ese"). You can also classify anything you want as a "word" as long as your classification would be immediately obvious to a typical user. (NB: this is not the place to debate what a "typical user" is :) )

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• How do I remove a validate class using jquery?

  - by InnateDev

  I have some options for pricing using radio buttons. When a user selects the radio button with no value my checkbox form must not be validated. here is my code: Options: <input type="radio" name="pricing_option_rect" id="pricing_imp_rect1" checked="checked" value="100">100 <input type="radio" name="pricing_option_rect" id="pricing_imp_rect2" value="200">200 <input type="radio" name="pricing_option_rect" id="pricing_imp_rect3" value="300">300 <input type="radio" name="pricing_option_rect" id="pricing_imp_rect4" value="0" />0 Checkboxes: <input type="checkbox" value="check1" name="rectcat[]" class="{validate:{required:true, minlength:1, maxlength:5}}" />One <input type="checkbox" value="check2" name="rectcat[]" />Two <input type="checkbox" value="check3" name="rectcat[]" />Three <input type="checkbox" value="check4" name="rectcat[]" />Four <input type="checkbox" value="check5" name="rectcat[]" />Five <input type="checkbox" value="check6" name="rectcat[]" />Six <input type="checkbox" value="check7" name="rectcat[]" />Seven <input type="checkbox" value="check8" name="rectcat[]" />Eight <div class="container"><label for="rectcat[]" class="error">Please Select a Minimum of ONE and a Maximum of FIVE categories!</label></div>

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• How do you validate a URL with a regular expression in Python?

  - by Zachary Spencer

  I'm building a Google App Engine app, and I have a class to represent an RSS Feed. I have a method called setUrl which is part of the feed class. It accepts a url as an input. I'm trying to use the re python module to validate off of the RFC 3986 Reg-ex (http://www.ietf.org/rfc/rfc3986.txt) Below is a snipped which should work, right? I'm incredibly new to Python and have been beating my head against this for the past 3 days. p = re.compile('^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?') m = p.match(url) if m: self.url = url return url

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• How can I get the edit control in a cell of a DataGridView to validate itself?

  - by Stuart Helwig

  It appears that the only way to capture the keypress events within a cell of a DataGridView control, in order to validate user input as they type, is to us the DataGridView controls OnEditControlShowing event, hook up a method to the edit control's (e.Control) keypress event and do some validation. My problem is that I've built a heap of custom DataGridView column classes, with their own custom cell types. These cells have their own custom edit controls (things like DateTimePickers, and Numeric or Currency textboxes.) I want to do some numeric validation for those cells that have Numeric of Currency Textboxes as their edit controls but not all the other cell types. How can I determine, within the DataGridView's "OnEditControlShowing" override, whether or not a particular edit control needs some numeric validation? (In the meantime I've restorted to setting the Tag property of my custom edit controls to a known value and any Edit Controls I find in the OnEditControlShowing override, I hook to my validation routine - I don't like that much!)

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• Is `eval`ing in a CPAN module without localizing $@ a bug?

  - by rassie

  I think I've encountered a bug in Params::Validate, but I'm not sure whether I identified the problematic code piece correctly. The code in question failed to pass exceptions up the chain (using Try::Tiny), so I started debugging and found out that a class used inside the try block has a destructor. This destructor calls object methods which use Params::Validate and looking into Validate.pm source I see an eval without $@ localization, i.e. the global $@ gets overwritten. Now I see two options: Params::Validate should always localize $@ and thus it's a bug that should be reported. The bug is in the class in question, because it shouldn't use Params::Validate in a destructor. Params::Validate can stay as it is now. Which one is it? How I should I handle this situation? PS: I think that CPAN modules should be rock-solid and neither break themselves nor their environment, hence the question title.

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• How can I validate input to the edit control of a cell in a DataGridView?

  - by Stuart Helwig

  It appears that the only way to capture the keypress events within a cell of a DataGridView control, in order to validate user input as they type, is to us the DataGridView controls OnEditControlShowing event, hook up a method to the edit control's (e.Control) keypress event and do some validation. My problem is that I've built a heap of custom DataGridView column classes, with their own custom cell types. These cells have their own custom edit controls (things like DateTimePickers, and Numeric or Currency textboxes.) I want to do some numeric validation for those cells that have Numeric of Currency Textboxes as their edit controls but not all the other cell types. How can I determine, within the DataGridView's "OnEditControlShowing" override, whether or not a particular edit control needs some numeric validation?

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• Is it safe to validate a URL with a regexp?

  - by Vilx-

  In my web app I've got a form field where the user can enter an URL. I'm already doing some preliminary client-side validation and I was wondering if I could use a regexp to validate if the entered string is a valid URL. So, two questions: Is it safe to do this with a regexp? A URL is a complex beast, and just like you shouldn't use a regexp for parsing HTML, I'm worried that it might be unsuitable for a URL as well. If it can be done, what would be a good regexp for the task? (I know that Google turns up countless regexps, but I'm worried about their quality). My goal is to prevent a situation where the URL appears in the web page and is unusable by the browser.

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• How does one validate html that's generated from JS running in the browser?

  - by Henry Rose

  The page in question has very skeletal html sent over the wire to facilitate the building of a complicated UI in javascript. I'm now encountering a strange browser compatibility issue that feels very much like I've got a markup problem somewhere on the page. I've validated the page as it comes across the wire using the W3C tool and ensured there are no issues in that html. I've also tried validating the output of running on the browser console: document.getElementsByTagName('html')[0].outerHTML I find that the output of the above introduces lots of new issues, such as removing the trailing '/' in self closing tags. This added noise is distracting, but it also makes me uneasy about validating this method. How do you validate markup that's rendered client side?

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• How do I validate that my the openid.op_endpoint when a request is completed.

  - by Sam Saffron

  I have an Open ID based authentication system on my site. Occasionally users will have an account registered under [email protected] and they will attempt to login using the google open id provider https://www.google.com/accounts/o8/id, in this case I would like to automatically associate the account and log them in. When the process is done I get a payload from somewhere claiming that openid.op_endpoint=https://www.google.com/accounts/o8/id. My question: Can I trust openid.op_endpoint to be correct? Can this be spoofed somehow by a malicious openid provider? For illustration, lets say someone types in http://evil.org as their openid provider, can I somehow end up getting a request back that claims openid.op_endpoint is google? Do I need to store extra information against the nonce to validate? The spec is kind of tricky to understand

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• How to validate my Jquery Datepicker for some days.

  - by kumar

  $("input[id^='Date-<%=Model.ID%>']").datepicker({ duration: 0, buttonImage: '/Content/images/calender.gif', buttonImageOnly: true, showOn:'button', constrainInput: true, showTime: true, stepMinutes: 30, stepHours: 1, altTimeField: '', time24h: true, minDate: 0 }); I have this Calender Control I am using..user can select any date from the calender.. I need to validate the dates like Saturday and Sundays and 1/1 and 1/25.. if they select these days I need to show them Popup message not valid date? can anybody help me out.. thanks

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• Is it possible to use Data Annotations to validate parameters passed to an Action method of a Contro

  - by dannie.f

  I am using Data Annotations to validate my Model in ASP.NET MVC. This works well for action methods that has complex parameters e.g, public class Params { [Required] string Param1 {get; set;} [StringLength(50)] string Param2 {get; set;} } ActionResult MyAction(Params params) { If(ModeState.IsValid) { // Do Something } } What if I want to pass a single string to an Action Method (like below). Is there a way to use Data Annotations or will I have to wrap the string into a class? ActionResult MyAction(string param1, string param2) { If(ModeState.IsValid) { // Do Something } }

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• Unable to validate data. at System.Web.Configuration.MachineKeySection.GetDecodedData

  - by Ben Williams

  I have several websites which get approximately 3000 pageviews in total per day, and I get this viewstate error roughly 5-10 times per day, caught in global.asax: System.Web.HttpException: Unable to validate data. at System.Web.Configuration.MachineKeySection.GetDecodedData(Byte[] buf, Byte[] modifier, Int32 start, Int32 length, Int32& dataLength) at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) I have tried: hard-coding the machine key in web.config for all websites hard-coding the machien key in machine.config adding items to the pages section of the web.config for all websites. Machine key looks like: <machineKey validationKey="key goes here" decryptionKey="key goes here" validation="SHA1" decryption="AES" /> Pages section looks like: <pages renderAllHiddenFieldsAtTopOfForm="true" validateRequest="false" enableEventValidation="false" viewStateEncryptionMode="Never"> The errors are not related to application pool recycling as best I can tell, as the pool is set to recycle at every 100,000 requests. I am not running a web farm or web garden. Quite often I get two or three of these errors in a row, as if a user is getting an error, going back, and then clicking the link again. Anyone have any ideas?

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• How can I tell the Data Annotations validator to also validate complex child properties?

  - by GWB

  Can I automatically validate complex child objects when validating a parent object and include the results in the populated ICollection<ValidationResult>? If I run the following code: using System; using System.Collections.Generic; using System.ComponentModel.DataAnnotations; namespace ConsoleApplication1 { public class Person { [Required] public string Name { get; set; } public Address Address { get; set; } } public class Address { [Required] public string Street { get; set; } [Required] public string City { get; set; } [Required] public string State { get; set; } } class Program { static void Main(string[] args) { Person person = new Person { Name = null, Address = new Address { Street = "123 Any St", City = "New York", State = null } }; var validationContext = new ValidationContext(person, null, null); var validationResults = new List<ValidationResult>(); var isValid = Validator.TryValidateObject(person, validationContext, validationResults); Console.WriteLine(isValid); validationResults.ForEach(r => Console.WriteLine(r.ErrorMessage)); Console.ReadKey(true); } } } I get the following output: False The Name field is required. But I was expecting something similar to: False The Name field is required. The State field is required.

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• JSF 2.0: Validate equality of 2 InputSecret Fields (confirm password) without writing Code?

  - by yournamehere

  I'm developing a pure JavaEE6 application with JSF 2.0 and Glassfish. My JSF implementation is Primefaces (beside Mojarra provided by Glassfish). I want to verify if the values of 2 password fields in a JSF form are equal. With Seam, there is the neat component <s:validateEquality for="pw1"/>. I want do to the same without Seam, just using JSF (or maybe a component of a JSF library). Until now i only saw examples which validate the form with a custom validator. But i would like to compare the fields without writing Java code or Javascript code. Is that possible? This what it looks like with Seam: ... <h:inputSecret id="passwort" value="#{personHome.instance.password}" redisplay="true" required="true"> <f:validateLength minimum="8"/> <a:support event="onblur" reRender="passwortField" bypassUpdates="true" ajaxSingle="true" /> </h:inputSecret> ... <h:inputSecret id="passwort2" required="true" redisplay="true"> <!-- find the JSF2.0-equivalent to this tag: --> <s:validateEquality for="passwort"/> <a:support event="onblur" reRender="passwort2Field" bypassUpdates="true" ajaxSingle="true" /> </h:inputSecret> ... Any help is appreciated. Thanks!

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• ASP.NET MVC: How do I validate a model wrapped in a ViewModel?

  - by Deniz Dogan

  For the login page of my website I would like to list the latest news for my site and also display a few fields to let the user log in. So I figured I should make a login view model - I call this LoginVM. LoginVM contains a Login model for the login fields and a List<NewsItem> for the news listing. This is the Login model: public class Login { [Required(ErrorMessage="Enter a username.")] [DisplayName("Username")] public string Username { get; set; } [Required(ErrorMessage="Enter a password.")] [DataType(DataType.Password)] [DisplayName("Password")] public string Password { get; set; } } This is the LoginVM view model: public class LoginVM { public Login login { get; set; } public List<NewsItem> newsItems { get; set; } } This is where I get stuck. In my login controller, I get passed a LoginVM. [HttpPost] public ActionResult Login(LoginVM model, FormCollection form) { if (ModelState.IsValid) { // What? In the code I'm checking whether ModelState is valid and this would work fine if the view model was actually the Login model, but now it's LoginVM which has no validation attributes at all. How do I make LoginVM "traverse" through its members to validate them all? Am I doing something fundamentally wrong using ModelState in this manner?

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• Is there a way to validate the presence of Javadoc and/or inline code comments?

  - by Chris Aldrich

  We are trying to put quality code processes in place for a large project I am working on. Right now a lot of developers are not putting in Javadoc or in-line code comments into their code. Ok right now. But it will severely hurt us in the very near future. We are using Maven 2.0.9 as our build tool, as well as Hudson for Continuous Integration. We are using Subversion as our source versioning tool/code repository, Rational Application Developer and Rational Softare Architect (essentially Eclipse) 7.5.1 as our IDE's, and then Subclipse as our Eclipse plug-in to connect to SVN. Is there a plug-in or a way to validate that a developer put in Javadoc and/or in-line code comments in order to allow a commit to SVN? This isn't intended to be a substitute for good code reviews, but merely a help to make sure that developers are reminded to add this documentation before committing. We are still intending on conducting code reviews that would also review documentation. Has anyone found any plug-ins for something like this? Any links? Any ideas?

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• Generic validate input data via regex. Input error when match.count == 0

  - by Valamas

  Hi, I have a number of types of data fields on an input form, for example, a web page. Some fields are like, must be an email address, must be a number, must be a number between, must have certain characters. Basically, the list is undefinable. I wish to come up with a generic way of validating the data inputed. I thought I would use regex to validate the data. The fields which need validation would be related to a "regex expression" and a "regex error message" stating what the field should contain. My current mock up has that when the match count is zero, that would signify an error and to display the message. While still a white belt regex designer I have come to understand that in certain situations that it is difficult to write a regex which results in a match count of zero for every case. A complex regex case I looked for help on was Link Here. The forum post was a disaster because I confused people helping me. But one of the statements said that it was difficult to make a regex with a match count of zero meaning the input data was invalid; that the regex was very difficult to write that for. Does anyone have comments or suggestions on this generic validation system I am trying to create? thanks

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• How to validate an array in a PHP form?

  - by SlAcKeR

  I'm fairly new to php and was wondering how do I validate the array for the states and where do I place the php code at? I already did the address part but I'm stuck at the states part. Here is the validation code. if (isset($_POST['contact_info_submitted'])) { // Handle the form. $address = mysqli_real_escape_string(htmlentities($_POST['address'])); } Here is the form code. <li><label for="address-1">Address 1: </label><input type="text" name="address-1" id="address-1" size="25" class="input-size" value="<?php if (isset($_POST['address'])) echo $_POST['address']; ?>" /></li> <li><label for="state-province">State/Province: </label> <?php echo '<select name="state-province" id="state-province">' . "\n"; foreach($state_options as $option) { if ($option == $state) { echo '<option value="' . $option . '" selected="selected">' . $option . '</option>' . "\n"; } else { echo '<option value="'. $option . '">' . $option . '</option>'."\n"; } } echo '</select>'; ?> </li>

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• ASP.NET Chart Control - During a PostBack

  - by Guilherme Cardoso

  To use the Chart control from a PostBack is necessary to modify the ChartImg.axd HttpHandler, otherwise we'll get the error message: Error executing child request for ChartImg.axd In Web.Config search the line: <add path = "ChartImg.axd" verb = "GET,HEAD" type = "System.Web.UI.DataVisualization.Charting.ChartHttpHandler, System.Web.DataVisualization, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" <Add path = "ChartImg.axd" verb = "GET, HEAD" type = "System.Web.UI.DataVisualization.Charting.ChartHttpHandler, System.Web.DataVisualization, Version = 3.5.0.0, Culture = neutral, PublicKeyToken = 31bf3856ad364e35 " validate = "false" /> Validate = "false" />   Change to: <add path = "ChartImg.axd" verb = "GET,HEAD,POST" type = "System.Web.UI.DataVisualization.Charting.ChartHttpHandler, System.Web.DataVisualization, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" <Add path = "ChartImg.axd" verb = "GET, HEAD, POST" type = "System.Web.UI.DataVisualization.Charting.ChartHttpHandler, System.Web.DataVisualization, Version = 3.5.0.0, Culture = Neutral, PublicKeyToken = 31bf3856ad364e35 " validate = "false" /> validate = "false" /> The attribute that we are adding is the Post.  For those not familiar with this control is very useful for creating graphics. You can see more information here .

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• SQL SERVER – Identifying guest User using Policy Based Management

  - by pinaldave

  If you are following my recent blog posts, you may have noticed that I’ve been writing a lot about Guest User in SQL Server. Here are all the blog posts which I have written on this subject: SQL SERVER – Disable Guest Account – Serious Security Issue SQL SERVER – Force Removing User from Database – Fix: Error: Could not drop login ‘test’ as the user is currently logged in SQL SERVER – Detecting guest User Permissions – guest User Access Status SQL SERVER – guest User and MSDB Database – Enable guest User on MSDB Database One of the requests I received was whether we could create a policy that would prevent users unable guest user in user databases. Well, here is a quick tutorial to answer this. Let us see how quickly we can do it. Requirements Check if the guest user is disabled in all the user-created databases. Exclude master, tempdb and msdb database for guest user validation. We will create the following conditions based on the above two requirements: If the name of the user is ‘guest’ If the user has connect (@hasDBAccess) permission in the database Check in All user databases, except: master, tempDB and msdb Once we create two conditions, we will create a policy which will validate the conditions. Condition 1: Is the User Guest? Expand the Database >> Management >> Policy Management >> Conditions Right click on the Conditions, and click on “New Condition…”. First we will create a condition where we will validate if the user name is ‘guest’, and if it’s so, then we will further validate if it has DB access. Check the image for the necessary configuration for condition: Facet: User Expression: @Name = ‘guest’ Condition 2: Does the User have DBAccess? Expand the Database >> Management >> Policy Management >> Conditions Right click on Conditions and click on “New Condition…”. Now we will validate if the user has DB access. Check the image for necessary configuration for condition: Facet: User Expression: @hasDBAccess = False Condition 3: Exclude Databases Expand the Database >> Management >> Policy Management >> Conditions Write click on Conditions and click on “New Condition…” Now we will create condition where we will validate if database name is master, tempdb or msdb and if database name is any of them, we will not validate our first one condition with them. Check the image for necessary configuration for condition: Facet: Database Expression: @Name != ‘msdb’ AND @Name != ‘tempdb’ AND @Name != ‘master’ The next step will be creating a policy which will enforce these conditions. Creating a Policy Right click on Policies and click “New Policy…” Here, we justify what condition we want to validate against what the target is. Condition: Has User DBAccess Target Database: Every Database except (master, tempdb and MSDB) Target User: Every User in Target Database with name ‘guest’ Now we have options for two evaluation modes: 1) On Demand and 2) On Schedule We will select On Demand in this example; however, you can change the mode to On Schedule through the drop down menu, and select the interval of the evaluation of the policy. Evaluate the Policies We have selected OnDemand as our policy evaluation mode. We will now evaluate by means of executing Evaluate policy. Click on Evaluate and it will give the following result: The result demonstrates that one of the databases has a policy violation. Username guest is enabled in AdventureWorks database. You can disable the guest user by running the following code in AdventureWorks database. USE AdventureWorks; REVOKE CONNECT FROM guest; Once you run above query, you can already evaluate the policy again. Notice that the policy violation is fixed now. You can change the method of the evaluation policy to On Schedule and validate policy on interval. You can check the history of the policy and detect the violation. Quiz I have created three conditions to check if the guest user has database access or not. Now I want to ask you: Is it possible to do the same with 2 conditions? If yes, HOW? If no, WHY NOT? Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: Best Practices, CodeProject, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, SQLServer, T SQL, Technology Tagged: Policy Management

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• Page output caching for dynamic web applications

  - by Mike Ellis

  I am currently working on a web application where the user steps (forward or back) through a series of pages with "Next" and "Previous" buttons, entering data until they reach a page with the "Finish" button. Until finished, all data is stored in Session state, then sent to the mainframe database via web services at the end of the process. Some of the pages display data from previous pages in order to collect additional information. These pages can never be cached because they are different for every user. For pages that don't display this dynamic data, they can be cached, but only the first time they load. After that, the data that was previously entered needs to be displayed. This requires Page_Load to fire, which means the page can't be cached at that point. A couple of weeks ago, I knew almost nothing about implementing page caching. Now I still don't know much, but I know a little bit, and here is the solution that I developed with the help of others on my team and a lot of reading and trial-and-error. We have a base page class defined from which all pages inherit. In this class I have defined a method that sets the caching settings programmatically. For pages that can be cached, they call this base page method in their Page_Load event within a if(!IsPostBack) block, which ensures that only the page itself gets cached, not the data on the page. if(!IsPostBack) {     ...     SetCacheSettings();     ... } protected void SetCacheSettings() {     Response.Cache.AddValidationCallback(new HttpCacheValidateHandler(Validate), null);     Response.Cache.SetExpires(DateTime.Now.AddHours(1));     Response.Cache.SetSlidingExpiration(true);     Response.Cache.SetValidUntilExpires(true);     Response.Cache.SetCacheability(HttpCacheability.ServerAndNoCache); } The AddValidationCallback sets up an HttpCacheValidateHandler method called Validate which runs logic when a cached page is requested. The Validate method signature is standard for this method type. public static void Validate(HttpContext context, Object data, ref HttpValidationStatus status) {     string visited = context.Request.QueryString["v"];     if (visited != null && "1".Equals(visited))     {         status = HttpValidationStatus.IgnoreThisRequest; //force a page load     }     else     {         status = HttpValidationStatus.Valid; //load from cache     } } I am using the HttpValidationStatus values IgnoreThisRequest or Valid which forces the Page_Load event method to run or allows the page to load from cache, respectively. Which one is set depends on the value in the querystring. The value in the querystring is set up on each page in the "Next" and "Previous" button click event methods based on whether the page that the button click is taking the user to has any data on it or not. bool hasData = HasPageBeenVisited(url); if (hasData) {     url += VISITED; } Response.Redirect(url); The HasPageBeenVisited method determines whether the destination page has any data on it by checking one of its required data fields. (I won't include it here because it is very system-dependent.) VISITED is a string constant containing "?v=1" and gets appended to the url if the destination page has been visited. The reason this logic is within the "Next" and "Previous" button click event methods is because 1) the Validate method is static which doesn't allow it to access non-static data such as the data fields for a particular page, and 2) at the time at which the Validate method runs, either the data has not yet been deserialized from Session state or is not available (different AppDomain?) because anytime I accessed the Session state information from the Validate method, it was always empty.

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