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• Forms Authentication and Login controls

  - by DotnetDude

  I am upgrading a website written using ASP.NET 1.1 and the logic for the login page includes verifying the credentials, calling FormsAuthentication.SetAuthCookie() and populating the Session with the user information. I am updating this page to use Login controls and the Membership API and am trying to wrap my head around the concepts that have been changed. Most of the samples I see do not do anything on the login button event handler, so is the logic of setting the cookie abstracted out into the control? Also, how do I check if a user is logged in or not on other pages. Does it still store user information using the Session? How do I check if a user belongs to a particular role or not (Earlier, I would look in the Session object to do something like this) Is the Session a bad way of storing user info? Thanks

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• HttpModule Init method is called several times - why?

  - by MartinF

  I was creating a http module and while debugging I noticed something which at first (at least) seemed like weird behaviour. When i set a breakpoint in the init method of the httpmodule i can see that the http module init method is being called several times even though i have only started up the website for debugging and made one single request (sometimes it is hit only 1 time, other times as many as 10 times). I know that I should expect several instances of the HttpApplication to be running and for each the http modules will be created, but when i request a single page it should be handled by a single http application object and therefore only fire the events associated once, but still it fires the events several times for each request which makes no sense - other than it must have been added several times within that httpApplication - which means it is the same httpmodule init method which is being called every time and not a new http application being created each time it hits my break point (see my code example at the bottom etc.). What could be going wrong here ? is it because i am debugging and set a breakpoint in the http module? It have noticed that it seems that if i startup the website for debugging and quickly step over the breakpoint in the httpmodule it will only hit the init method once and the same goes for the eventhandler. If I instead let it hang at the breakpoint for a few seconds the init method is being called several times (seems like it depends on how long time i wait before stepping over the breakpoint). Maybe this could be some build in feature to make sure that the httpmodule is initialised and the http application can serve requests , but it also seems like something that could have catastrophic consequences. This could seem logical, as it might be trying to finish the request and since i have set the break point it thinks something have gone wrong and try to call the init method again ? soo it can handle the request ? But is this what is happening and is everything fine (i am just guessing), or is it a real problem ? What i am specially concerned about is that if something makes it hang on the "production/live" server for a few seconds a lot of event handlers are added through the init and therefore each request to the page suddenly fires the eventhandler several times. This behaviour could quickly bring any site down. I have looked at the "original" .net code used for the httpmodules for formsauthentication and the rolemanagermodule etc but my code isnt any different that those modules uses. My code looks like this. public void Init(HttpApplication app) { if (CommunityAuthenticationIntegration.IsEnabled) { FormsAuthenticationModule formsAuthModule = (FormsAuthenticationModule) app.Modules["FormsAuthentication"]; formsAuthModule.Authenticate += new FormsAuthenticationEventHandler(this.OnAuthenticate); } } here is an example how it is done in the RoleManagerModule from the .NET framework public void Init(HttpApplication app) { if (Roles.Enabled) { app.PostAuthenticateRequest += new EventHandler(this.OnEnter); app.EndRequest += new EventHandler(this.OnLeave); } } Do anyone know what is going on? (i just hope someone out there can tell me why this is happening and assure me that everything is perfectly fine) :) UPDATE: I have tried to narrow down the problem and so far i have found that the Init method being called is always on a new object of my http module (contary to what i thought before). I seems that for the first request (when starting up the site) all of the HttpApplication objects being created and its modules are all trying to serve the first request and therefore all hit the eventhandler that is being added. I cant really figure out why this is happening. If i request another page all the HttpApplication's created (and their moduless) will again try to serve the request causing it to hit the eventhandler multiple times. But it also seems that if i then jump back to the first page (or another one) only one HttpApplication will start to take care of the request and everything is as expected - as long as i dont let it hang at a break point. If i let it hang at a breakpoint it begins to create new HttpApplication's objects and starts adding HttpApplications (more than 1) to serve/handle the request (which is already in process of being served by the HttpApplication which is currently stopped at the breakpoint). I guess or hope that it might be some intelligent "behind the scenes" way of helping to distribute and handle load and / or errors. But I have no clue. I hope some out there can assure me that it is perfectly fine and how it is supposed to be?

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• group expression in jasper reports

  - by ed1t

  I've a report which has a has 5 columns on each page and I have a group defined which shows columns related to A | B | C | D | E - main column X | Y | Z - group - A is the key I have my query ORDER BY A, but when it is displayed it doesn't print the results in next page if A is changed. Following is how I have a group defined. <group name="A" isResetPageNumber="true" > <groupExpression><![CDATA[$F{A}]]></groupExpression> <groupHeader> <band/> </groupHeader> <groupFooter> <band/> </groupFooter> </group> does A need to be part of the group?

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• Listen for keypress while iframe has focus?

  - by Matrym

  Is there any way to listen for keypress events in a parent page while the iframe has focus? Or, alternatively, is it possible to pull away the focus from the iframe? Please note, the iframe is not within the same domain, so I cannot modify it's contents via javascript. I've tried the following jquery in the parent page, thinking perhaps an intermittent blur would work, but it doesn't seem to. function iframeBlur(){ $("#iframe").blur(); } var blurif = setInterval(iframeBlur, 500); Thanks for your time!

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• Jquery: Preload an image on request with a callback function?

  - by tarnfeld

  Hey, I'm helping out a friend with a website he's developing and we are having trouble with preloading images on request. Basically, when the user clicks on a thumbnail of the product a <div> slides down that includes a scrolling carrousel of large images. In total there are about 20MB of images that could be loaded in (if you did them all) so preloading them on the page load would not be an option. Is there a way that we could call a javascript function that begins to preload about 4 images and then when it's done it has a callback function? Thanks! P.S. We are using jQuery on the page...

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• Dynamicdata Validation Exception Message Caught in JavaScript, not DynamicValidator

  - by Perplexed

  I have a page here with a few list views on it that are all bound to Linq data sources and they seem to be working just fine. I want to add validation such that when a checkbox (IsVoid on the object) is checked, comments must be entered (VoidedComments on the object). Here's the bound object's OnValidate method: partial void OnValidate(ChangeAction action) { if (action == ChangeAction.Update) { if (_IsVoid) { string comments = this.VoidedComments; if (string.IsNullOrEmpty(this._VoidedComments)) { throw new ValidationException("Voided Comments are Required to Void an Error"); } } } } Despite there being a dynamic validator on the page referencing the same ValidationGroup as the dynamic control, when the exception fires, it's caught in JavaScript and the debugger wants to break in. The message is never delivered to the UI as expected. Any thoughts as to What's going on?

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• External Reference to Richfaces modal

  - by John

  Hi, I need to get a <rich:modalPanel id="mod1" .../> component to load an external page on "show" action, defined as: <a4j:commandButton value="link" id="l1" reRender="mod1" oncomplete="Richfaces.showModalPanel('mod1')"> <f:setPropertyActionListener target="#{mybean.someParam}" value="#{myOtherbean.someOtherparam}" /> </a4j:commandButton> . My first try was with <rich:modalPanel id="mod1"> <ui:include src="#{mybean.generateURL()"/> </rich:modalPanel> but it just throws me a 404 page not found error, typing the generated URL directly into the address bar works perfectly fine. Does anyone know what's causing the problem , or what's the correct way to do this? The system is running on seam/richfaces. Thanks!

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• PHP Session variables not passing across pages

  - by mitch

  Common problem, but I'm stumped. Session variables are passing across pages on my local (localhost) deployment, but not on my (www) host. I use a common includes file for each page with this code: $sessionDomain = "/"; @ini_set("session.cookie_path",$sessionDomain); $sessionName = "ccSID".md5('/store/'); session_name($sessionName); session_start(); I confirmed that the session ID cookie (ccSIDxxxxx...) remains the same across pages in my browser, but session variables don't seem to hold up when changing to a page in a different directory.

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• ASP.NET 2.0: Specifying an instance of an object for an ObjectDataSource

  - by Austin Salonen

  I'm using an ObjectDataSource to bind data to a GridView; it works fine except that it always creates a new object to use as a data source. I can do all the setup just fine but I cannot use an instance of an existing object to specify as the "data source" for it. Is it possible to do this? If so, how? If it's not possible, why? EDIT: Here's the gist of what's going on (object types changed): On the first page you are editting the attributes for a dog. One of the attributes is "has puppies" and if it's true, the next page you specify the names of those puppies. What's happening in my case is that those puppies are not getting linked to the original dog but to a "new" dog. (The implication that my problem is a "female dog" was coincidental. ;-) )

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• help in c# and javascript

  - by scatman

  how can i call a javascript function, that is in the aspx page, from the Page_Load method, in the code behind?

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• How to change id value when using Html.DropDownListFor helper in asp.net mvc 2.0?

  - by chobo2

  Hi I have a partial view that has something like this <%= Html.DropDownListFor(m => m.SelectedProductName, Model.ProductList, "Select a Product") %> Now you can create a new product and edit a existing product. Both editing and creating use the same form. The create is on the main page on load up. Edit popus up in a jquery u.i model dialog and renders a new partial view. So as far as the page is concerned is that I have 2 dropdown boxes with the same "id" which is bad since they should be unique. So how do I change the id? So when the edit loads it might have a id of "editSelectedProductName"? I tried to do this in the view model public string SelectedProductName{ get; set; } ViewModelConstructor() { SelectedProductName = "EditSelectedProductName"; } But it seems to not care and keeps using "SelectedProductName" as the product name. Thanks

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• Adding dynamic links using NavigateURL on ASP.NET (VB)

  - by AZIRAR

  Hello, I Have this code in my page, and I want that every NavigateUrl display another page like : simple.aspx?id=1, simple.aspx?id=2, ... Where id = c Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Dim c As Integer = 0 While c < 5 Dim Label1 As New Label() Dim ltr As New Literal() Dim link As New HyperLink() link.NavigateUrl = "simple.aspx" link.BackColor = Drawing.Color.Aqua Label1.Text = c.ToString() ltr.Text = "<br/>" PlaceHolder1.Controls.Add(Label1) PlaceHolder1.Controls.Add(link) PlaceHolder1.Controls.Add(ltr) c += 1 End While End Sub Thanks.

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• uninitialized constant Active Scaffold rails 2.3.5

  - by Kiva

  Hi guy, I update my rails application 2.0.2 to 2.3.5. I use active scaffold for the administration part. I change nothing in my code but a problem is coming with the update. I have a controller 'admin/user_controller' to manage users. Here is the code of the controller: class Admin::UserController < ApplicationController layout 'admin' active_scaffold :user do |config| config.columns.exclude :content, :historique_content, :user_has_objet, :user_has_arme, :user_has_entrainement, :user_has_mission, :mp, :pvp, :user_salt, :tchat, :notoriete_by_pvp, :invitation config.list.columns = [:user_login, :user_niveau, :user_mail, :user_bloc, :user_valide, :group_id] #:user_description, :race, :group, :user_lastvisited, :user_nextaction, :user_combats_gagner, :user_combats_perdu, :user_combats_nul, :user_password, :user_salt, :user_combats, :user_experience, :user_mana, :user_vie config.create.link.page = true config.update.link.page = true config.create.columns.add :password, :password_confirmation config.update.columns.add :password, :password_confirmation config.create.columns.exclude :user_password, :user_salt config.update.columns.exclude :user_password, :user_salt config.list.sorting = {:user_login => 'ASC'} config.subform.columns = [] end end This code hasn't change with the update, but when I go in this page, I got this error: uninitialized constant Users /Users/Kiva/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:443:in `load_missing_constant' /Users/Kiva/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:80:in `const_missing' /Users/Kiva/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:92:in `const_missing' /Users/Kiva/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/inflector.rb:361:in `constantize' /Users/Kiva/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/inflector.rb:360:in `each' /Users/Kiva/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/inflector.rb:360:in `constantize' /Users/Kiva/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/string/inflections.rb:162:in `constantize' /Users/Kiva/Documents/Projet-rpg/jeu/vendor/plugins/active_scaffold/lib/extensions/reverse_associations.rb:28:in `reverse_matches_for' /Users/Kiva/Documents/Projet-rpg/jeu/vendor/plugins/active_scaffold/lib/extensions/reverse_associations.rb:24:in `each' /Users/Kiva/Documents/Projet-rpg/jeu/vendor/plugins/active_scaffold/lib/extensions/reverse_associations.rb:24:in `reverse_matches_for' /Users/Kiva/Documents/Projet-rpg/jeu/vendor/plugins/active_scaffold/lib/extensions/reverse_associations.rb:11:in `reverse' /Users/Kiva/Documents/Projet-rpg/jeu/vendor/plugins/active_scaffold/lib/active_scaffold/data_structures/column.rb:117:in `autolink?' /Users/Kiva/Documents/Projet-rpg/jeu/vendor/plugins/active_scaffold/lib/active_scaffold.rb:107:in `links_for_associations' /Users/Kiva/Documents/Projet-rpg/jeu/vendor/plugins/active_scaffold/lib/active_scaffold/data_structures/columns.rb:62:in `each' /Users/Kiva/Documents/Projet-rpg/jeu/vendor/plugins/active_scaffold/lib/active_scaffold/data_structures/columns.rb:62:in `each' /Users/Kiva/Documents/Projet-rpg/jeu/vendor/plugins/active_scaffold/lib/active_scaffold.rb:106:in `links_for_associations' /Users/Kiva/Documents/Projet-rpg/jeu/vendor/plugins/active_scaffold/lib/active_scaffold.rb:59:in `active_scaffold' /Users/Kiva/Documents/Projet-rpg/jeu/app/controllers/admin/user_controller.rb:11 I search since 2 days but I don't find the problem, can you help me please.

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• asp.net mvc form add comment

  - by Pinu

  I have a page where a product appears on the right side and the user can add comment so i have a user control which gets all the comments and a small text area where user can add new comment for that product. the link of the page is like http://localhost/Product/TestComment/1 Where 1 indicates the id of the product and I have been hard coding my AddNote function below and fourth argument you see has been hard coded, but i need to pass that as the id of the product. How do i do this AddNote(HttpContext.User.Identity.ToString(), txtComment, 1, DateTime.Now, true); [AcceptVerbs(HttpVerbs.Post)] public ActionResult AddComment(string txtComment) { bool rst = _NotesService.AddNote(HttpContext.User.Identity.ToString(), txtComment, 1, DateTime.Now, true); return RedirectToAction("TestComment"); }

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• Catching an exception when trying to launch a URL service from within Safari on an iPhone

  - by Ariel

  Hey guys, I was wondering if anyone knows - if I have an iPhone app that is registered with a URL service (e.g. alocola://), which means another app can invoke it by calling its URL - is there any way to embed this URL in an HTML page, and catch the exception if the app is not installed on the user's iPhone? Or in other words / more details: I would like to write an app that conforms to some URL invocation (like alocola:// is doing), but would like this app to be launched from a web page read by mobile Safari. However, if the app is not installed on the user's iphone, I would like to be able to display a note saying "you must have the alocola app installed on your iPhone, please download it from the app store by clicking here". Is there a way (perhaps using javascript) to have Safari indicate that the URL cannot be invoked, and catch this in order to display an intelligent message? Thanks :-) Ariel

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• Python and App Engine project structure

  - by Joel

  Hello, I am relatively new to python and app engine, and I just finished my first project. It consists of several *.py files (usually py file for every page on the site) and respectively temple files for each py file. In addition, I have one big PY file that has many functions that are common to a lot of pages, in I also declared the classes of db.Model (that is the datastore kinds). My question is what is the convention (if there is one) of arranging these files. If I create a model.py with the datastore classes, should it be in different package? Where should I put my template files and all of the py files that handle every page (should they be in the same directory as the one big common PY file)? I have tried to look for MVC and such implementations online but there are very few. Thanks, Joel

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• LocalReport (WebForms) and Partial Trust, for PDF Generation

  - by Peet Brits

  My goal is to generate a PDF for display in a web page, either as aspx or with a generic handler. (This will link from a Silverlight page, but this is irrelevant to the problem.) The problem is that LocalReport (Microsoft.Reporting.WebForms; Microsoft.ReportViewer.WebForms.dll) requires full trust, and our hosting server does not allow full trust. I am aware that ReportViewer has a remote mode that will allow it to run with partial trust, but for that I need a report server url which should probably have full trust as well, which does not solve anything. So how do I generate PDFs from WebForms in a partially trusted environment?

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• Grails / GORM, read-only cache and transient fields

  - by Stephen Swensen

  Suppose I have the following Domain object mapping to a legacy table, utilizing read-only second-level cache, and having a transient field: class DomainObject { static def transients = ['userId'] Long id Long userId static mapping = { cache usage: 'read-only' table 'SOME_TABLE' } } I have a problem, references to DomainObject instances seem to be shared due to the caching, and thus transient fields are writing over each other. For example, def r1 = DomainObject.get(1) r1.userId = 22 def r2 = DomainObject.get(1) r2.userId = 34 assert r1.userId == 34 That is, r1 and r2 are references to the same instance. This is undesirable, I would like to cache the table data without sharing references. Any ideas?

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• Django queries: Count number of objects with FK to model instance

  - by Chris Lawlor

  This should be easy but for some reason I'm having trouble finding it. I have the following: App(models.Model): ... Release(models.Model): date = models.DateTimeField() App = models.ForeignKey(App) ... How can I query for all App objects that have at least one Release? I started typing: App.objects.all().annotate(release_count=Count('??????')).filter(release_count__gt=0) Which won't work because Count doesn't span relationships, at least as far as I can tell. BONUS: Ultimately, I'd also like to be able to sort Apps by latest release date. I'm thinking of caching the latest release date in the app to make this a little easier (and cheaper), and updating it in the Release model's save method, unless of course there is a better way. Edit: I'm using Django 1.1 - not averse to migrating to dev in anticipation of 1.2 if there is a compelling reason though.

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• COMET with [Session ] TimeOut

  - by Amitd

  hi guys, Just Wondering how [Session] timeouts are(or can be) implemented when using Comet? I'm using Long polling Comet solution and want to implement a kind of Timeout feature. Example : If the user is on a Comet enabled page and doesn't respond to server events/notification for a period of time say 10 mins then invalidate his session and remove his request from server and redirect the user to a timeout page? Will this require Javascript XHR requests to check for a timeout explictly? Using ASP.NET 3.5 / C# (Doesn't need to be language specific) Thanks

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• How to use RadSpell within a Telerik MVC Grid editor popup?

  - by Brian David Berman

  Is it possible to use RadSpell within a Telerik MVC Grid editor popup? I have followed some of the examples online to use RadSpell with ASP.NET MVC (http://www.telerik.com/help/aspnet-ajax/mvc-using-spellchecker.html and http://www.telerik.com/help/aspnet-ajax/spell-client-side-api.html) and I am able to attach multiple text controls to check but the display gets messed up when using Telerik MVC Grid editor popups since it's already in a modal. Sometimes it will randomly pick another div on the page and treats it like it's the main window (it will gray out just a portion of the page and I'll see the RadSpell popup peeking through but it's unusable). It seems like it chooses different places in the DOM to inject the iframe/radwindow for RadSpell as well. Any ideas? I didn't include any code because my implementation is a mess and I'd prefer to start with something simpler, from scratch.

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• checkbox value after refresh

  - by moustafa

  hi guys, How to retain the checkbox value (in js) after refresh? There is a checkbox in this form. When the page is refreshed, the checkbox data disappears. Is there a way to refresh the page, while keeping the checkbox data? I have a window (#1) with a form and checkbox. #1 has a link to pop up another window (#2) with another form. When the form on #2 is completed, #1 is refreshed. My project is a combination of PHP and JS..please help Thank you.

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• How to handle CSS relative paths in an ASP.NET MVC application.

  - by AngryHacker

  I have a master page, which has a style sheet, which has the following line: .idle { background-image: url( '../../Images/blue_bg.png' ); } All my pages inherit from this master page. And this works well when the URL is http://www.domain.com/home/details/5, however the URL is http://www.domain.com/home/create, then, of course, blue_bg.png cannot be found because `../../Images/blue_bg.png' resolves to a directory one higher where there is nothing there. I tried the trick suggested by @codemeit in a similar question, but I can't plop down C# in a style sheet, can I? How is this typically handled?

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• How to show server errors in Rails 2.3.5 with JSON and jQuery

  - by Fortuity

  I've got in-place editing on a page in my app (using Rails 2.3.5 and jQuery). I want to know how to display an error on the page when the update fails. I'm using ajax (an XMLHttpRequest) to save an update to a Comment object. The controller has an update method like this: def update @comment = Comment.find(params[:id]) respond_to do |format| # if @comment.update_attributes!(params[:comment]) if false #deliberately forcing a fail here to see what happens format.json { render :nothing => true } else format.json { render :json => @comment.errors, :status => :unprocessable_entity } end end end In Firebug, I can see the server returns a "422" (an appropriate validation error status code). But it's a response to an XMLHttpRequest so there is no redirect to an error page. I think I actually want to do this: format.json { render :json => @comment.errors} or maybe this: format.json {render :json => { :status => :error, :message => "Could not be saved" }.to_json, :status => 400 } and trigger some Javascript function that iterates through (and displays) any errors. I'm using a rails plugin http://github.com/janv/rest_in_place/ to implement the in-place editing. It doesn't appear to have any callback function to handle a failure. What are my options? Can I write some Javascript to respond to a failure condition without hacking the plugin? Do I have to hack the rest_in_place plugin to handle a failure condition? Is there a better plugin (for Rails or jQuery) that handles in-place editing, including failure conditions? UPDATE This post from Peter Bui (http://paydrotalks.com/posts/45-standard-json-response-for-rails-and-jquery) was helpful in showing how to handle an error message from the server using XMLHttpRequest.status. I looked at his implementation of a blog using ajax (http://github.com/paydro/talks). I'm surprised at the complexity required to handle a simple error condition. Usually Rails has all the goodness baked in but it seems server errors with JSON are out of scope. Can that be? I also looked at grimen's validatious-on-rails (http://github.com/grimen/validatious-on-rails/) which accommodates models validations when ajax XMLHttpRequest is used. It's not clear to me how I'd use it to handle the general case of a "save" failing when validations succeed. P.S. Please vote me up... so I can use more than one HTML link when I ask my question :-)

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• Routing Users to single Models with Rails

  - by Eric Koslow

  I'm creating a Rails app for students and high schools and I'm having some trouble with my User.rb. I want to have a user model to be used for logging in, but having that user have many roles. The tricky part is that I want users that have a student role to have_one student page, and those that have a role of principal to have_one high_school page. The students and also nested in the high_school so the entire thing becomes a big mess. So my question(s): How do I limit a user to only creating one student / high school to represent them? Also how would I nest this student pages inside the highschool without screwing up the user system? My environment: Rails3 and Ruby 1.9.2dev Thank you!

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