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• ASP MVC C#: Is it possible to pass dynamic values into an attribute?

  - by wh0emPah

  Okay I'm very new to C# and i'm trying to create a little website using ASP MVC2. I want to create my own authorization attribute. but i need to pass some values if this is possible. For example: [CustomAuthorize(GroupID = Method Parameter?] public ActionResult DoSomething(int GroupID) { return View(""); } I want to authorize the access to a page. but it depends on the value passed to the controller. So the authorization depends on the groupID. Is this possible to achieve this in any way?. Thanks in advance.

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• ASP.NET MVC. Hot to guess autogenerated id value ?

  - by Andrew Florko

  My web form contains list of dynamic fields that are generated like this: <% for (int i = 0; i < Model.Options.Count; i++) { %> ... <%= Html.Hidden("Options[" + i + "].Id", Model.Options[i].Id)%> <%= Html.CheckBox("Options[" + i + "].Selected", Model.Options[i].Selected)%> ... This maps perfectly on array of controller method parameters as described in Model Binding To A List article. I want to add label for checkboxes to title them, but I have to guess their ids in hmtl layout. Options[" + i + "].Selected turns into Options_0__Selected How can I avoid hardcoding Id generation in-built asp.net mvc rules? Thank you advance.

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• What is the preferred way of loading browser-specific CSS files?

  - by Yuval A

  What is the best way to handle browser-specific CSS file loading? Assume you are running in the context of a proper MVC framework. Here are some options, you are free to discuss the pros and cons of these options as well as any other methods you know of, and prefer: Server-side solution: use the controller (e.g. servlet) to analyze the user-agent header in the request and return the proper CSS file in the view. Use browser specific hacks to load files, such as: <!--[if IE]> ... <![endif]--> Load CSS files asynchronously in client side by inspecting user-agent and adding respective files Use a client side framework to handle browser-specifics (such as jQuery browser-specific css rules)

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• view is not rendered when returning ModelAndView

  - by adancu

  Hi, I have the following problem. I need to export a PDF in a controller The code below, where I return a View, works as expected. @RequestMapping(method = RequestMethod.GET) public View exportReport( @RequestParam(value = "userName", required = true) String userName, @RequestParam(value = "startDate", required = true) Date startDate, @RequestParam(value = "endDate", required = true) Date endDate) { /////////////////////////////////////////// return new TimeSheetReportPdfView(); } The problem occurs if I change the method to return a ModelAndView: @RequestMapping(method = RequestMethod.GET) public ModelAndView exportReport( @RequestParam(value = "userName", required = true) String userName, @RequestParam(value = "startDate", required = true) Date startDate, @RequestParam(value = "endDate", required = true) Date endDate) { /////////////////////////////////////////// return new ModelAndView(new TimeSheetReportPdfView(), model); } Now, the PDF is not exported, all I get is a blank page and nothing in the logs. Any help appreciated. Thanks.

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• Do I need to invoke MessageBox calls?

  - by mafutrct

  To pop-up a message box, I'm using MessageBox.Show(...). I usually wrap this call in an Invoke: BeginInvoke (new Action (() => { MessageBox.Show ()); })); I've got 2 questions: Do I always need to wrap the MessageBox call in an Invoke if I'm calling from a non-GUI thread? If so, should I use BeginInvoke or Invoke? I found not much difference in my tests, BeginInvoke is, as expected (and unlike Invoke), displayed with a slight delay.

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• NSArrayController that is sorted and unique (no duplicates) for use in a pop-up in a core-data app

  - by Douglas Weaver

  I have core data app with an entity OBSERVATION that has as one of its attributes DEALNAME. I want to reference through Interface Builder or by making custom modifications to an NSArrayController a list of unique sorted dealnames so that I can use them in a pop-up. I have attempted to use @distinctUnionOfSets (and @distinctUnionOfArrays) but am unable to locate the proper key sequence. I can sort the ArrayController by providing a sort descriptor, but do not know how to eliminate duplicates. Are the @distinct... keys the right methodology? It would seem to provide the easiest way to optimize the use of IB. Is there a predicate form for removing duplicates? Or do I need to use my custom controller to extract an NSSet of the specific dealnames, put them back in an array and sort it and reference the custom array from IB? Any help would be appreciated. I am astounded that other have not tried to create a sorted-unique pop-up in tableviews.

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• Why Eclipse does not see .jar file of a library?

  - by Roman

  I have a java project in which I have "Referenced Libraries". In the "Referenced Libraries" I have a .jar file of a library that I use (I use only one external library). When I try to "Run - Run" the code I have a NullPointerException. From my previous experience I know that it it (very likely) because my code does not see the library. I just started to use Eclipse and it can be the I do not "connect" libraries in a correct way. Should I use some options or additional action to force Eclipse to see the .jar file of the library? ADDED: By the right click on the library I get a drop-down menu in which I see "Build Path". My be I need to do something there?

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• Referring to a non-final variable data inside an inner class

  - by shoaibmohammed

  Im doing a program in GWT. Here is the snippet where Im having problem private String[] populateRSSData() { 1==>> String[] data = null; try { new RequestBuilder(RequestBuilder.GET, "../database.php?action=populaterss").sendRequest(null, new RequestCallback() { @Override public void onResponseReceived(Request request, Response response) { 2==>> data=response.getText().split("~"); } @Override public void onError(Request request, Throwable exception) { Window.alert(exception.getMessage()); } }); } catch (RequestException e) { Window.alert(e.getMessage()); } return data; } Now the problem arises that I get an error that the variable 1==>> data should be declared final. But if I declare it as final then i cannot store the datas in 2==>> The error i get Cannot refer to a non-final variable data inside an inner class defined in a different method RSS_Manager.java Please suggest

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• How to retrieve an url parameter in the Zend Framework ?

  - by ismaelsow

  Hello guys ! I'am trying to retrieve an parameter passed in a url using the zend framework. But of course, it is not working ! My code looks like this : Generating the url : <?php echo $this->url(array('controller' => 'poll', 'action' => 'showresults', 'poll_id' => $poll['_id']), null, true) ?> Retrieving the "poll_id" parameter in showresultsAction() : $request = new Zend_Controller_Request_Http(); $poll_id = $request->getParam('poll_id'); The problem is that $poll_id is NULL. When I do a var_dump of $request-getParams(), it is also NULL. I have glanced trough the Zend Framework doc, but it was not very usefull. Any idea ? Thanks !

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• ASP.NET MVC - How to Preserve ModelState Errors Across RedirectToAction?

  - by RPM1984

  Hi Guys, I have the following two action methods (simplified for question): [HttpGet] public ActionResult Create(string uniqueUri) { // get some stuff based on uniqueuri, set in ViewData. return View(); } [HttpPost] public ActionResult Create(Review review) { // validate review if (validatedOk) { return RedirectToAction("Details", new { postId = review.PostId}); } else { ModelState.AddModelError("ReviewErrors", "some error occured"); return RedirectToAction("Create", new { uniqueUri = Request.RequestContext.RouteData.Values["uniqueUri"]}); } } So, if the validation passes, i redirect to another page (confirmation). If an error occurs, i need to display the same page with the error. If i do return View(), the error is displayed, but if i do return RedirectToAction (as above), it loses the Model errors. I'm not surprised by the issue, just wondering how you guys handle this? I could of course just return the same View instead of the redirect, but i have logic in the "Create" method which populates the view data, which i'd have to duplicate. Any suggestions?

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• Grails remoteLink handling error codes

  - by soybie

  I'm on grails 1.3.6 and I see the following behavior. <g:javascript library="prototype" /> ... <g:remoteLink action="punch" id="${personInstance.id}" update="damage_${personInstance.id}" on401="alert('foo!');"> generates: <a on401="alert('foo!');" onclick="new Ajax.Updater('damage_5','/blah/person/punch/5',{asynchronous:true,evalScripts:true});return false;" href="/blah/person/punch/5"></a> "on401" isn't a supported event attribute for an anchor tag, so is this a bug in grails?

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• How to put PrintWriter object content in to table cell

  - by user3599482

  I have a small problem about a content returning from servlet to put in table cell. In javascript I am calling servlet method using post, it returns some content and I have to put it in two different <td> cells. here is my code, In javascript, $.post('<%=request.getContextPath()%>/controller/UserLockController',{'userName':userName,'status':status}, function(data) { document.getElementById("status_"+userName).innerHTML=data; document.getElementById("td_"+userName).innerHTML=data; }); in servlet it writes as, out.println("<td id=\"status_"+inputParam+"\">Locked</td>"); out.println("<td id=\"td_"+inputParam+"\"><a href=\"#\" class=\"btn btn-sm btn-primary unlockBtn\" id=\"togBtn_"+inputParam+"\" onClick=\"LockAccount('"+inputParam+"','"+status+"')\">UnLock</td>"); Here content is returning but problem is the both <td> return from servlet will fit in single cell of html table. how to solve this please help me.

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• Does SQL Server 2005 error message numbers back to the asp.net application?

  - by Duke

  I'd like to get the message number and severity level information from SQL Server upon execution of an erroneous query. For example, when a user attempts to delete a row being referenced by another record, and the cascade relationship is "no action", I'd like the application to be able to check for error message 547 ("The DELETE statement conflicted with the REFERENCE constraint...") and return a user friendly and localized message to the user. When running such a query directly on SQL Server, the following message is printed: Msg 547, Level 16, State 0, Line 1 <Error message...> In an Asp.Net app is this information available in an event handler parameter or elsewhere? Also, I don't suppose anyone knows where I can find a definitive reference of SQL Server message numbers?

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• How can a web developer learn to develop for the iPhone?

  - by Jared Christensen

  I'm a web developer and I'm getting envious of all the cool iPhone apps. I know nothing about C or what ever language they use to make iPhone apps. I really have no idea where to start. What do I need to do? Should I take a class, buy a book? I have a pretty good grasp on programing, I do tons of HTML, CSS and Javascript development and some PHP and Action Scripting. I'm not very good with Object Oriented Programing but I think I could pick it up if I used it more. I love video tutorials like lynda.com or net.tutsplus.com. I learn best buy jumping in and getting my hands dirty.

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• Updating div after full page refresh following AJAX request

  - by TonE

  Hi, I have an AJAX controller action which returns JSON. The returned JSON is handled via jQuery and contains a message displayed in an update div. The JSON also contains a flag which indicates a change in state. If this is true the entire page needs to be reloaded from a different url. This is currently performed in the jQuery using window.location.replace(url). In the situation where a full page refresh occurs, I still want to display the message from the JSON in the update div, but after the page has fully reloaded. How can I ensure the div is updated with the message after the window.location.replace call and the page has been completely reloaded? Thanks. (I realise AJAX is not intended for full page refreshes but I can't think of a simple way of avoiding it in this scenario. Normal behaviour here is updating the div with a status message.)

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• Ruby on Rails: restrict file type with Paperclip using a flash uploader

  - by aperture

  I have a pretty basic Paperclip Upload model that is attached to a User model through has_many, and am using Uploadify to do the actual uploading. Flash sends all files with the content type of "application/octet-stream" so using validates_attachment_content_type rejects all files. In my create action, I am able to get the mime-type from the original file name, but only after it's been saved, with: def coerce(params) h = Hash.new h[:upload] = Hash.new h[:upload][:attachment].content_type = MIME::Types.type_for(h[:upload][:attachment].original_filename).to_s ... end and def create diff_params = coerce(params) @upload = Upload.new(diff_params[:upload]) ... end What would be the best way of white listing file types? I am thinking a before_validation method, but I'm not sure how that would work. Any ideas would be welcome.

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• How do you learn a class hierarchy quickly?

  - by rsteckly

  Hi, Something I don't enjoy about programming is learning a new API. For example, right now I'm trying to learn Windows Identity Foundation. Its frustrating because I'm going to spend the bulk of the time learning how a few classes work and actually only write several lines of code. In .NET, there are so many types that I seem to spend more time hunting around in msdn for a class than writing code. It also interrupts my workflow while I'm working because I have to type a little bit than look something up. Obviously, I don't have to do this for the basic classes. Whenever new things come though there is definitely some looking up to do. Then I often don't reuse that class enough to really review it or bring it into action. I'm wondering if anybody out there has a found a way to memorize (or look up more efficiently) these object model hierarchies?

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• JSON Object XHR and closures

  - by Sara Chipps

  Hi all, I have a JSON object that is populated by an XHR. I then need to update that object with values from a separate XHR call. The issue I am running into is the second call isn't being made at the correct time and I think it's an issue with how I structured my object. Here is what I have: function Proprietary() { var proprietary= this; this.Groups = {}; this.getGroups = function() { $.getJSON(group_url, function(data){proprietary.callReturned(data);}); } this.callReturned = function(data) { //Do stuff for(var i=0; i< data.groups.length; i++) { insparq.Groups[i] = data.groups[i]; $.getJSON(participant_url, function(p){proprietary.Groups[i].participants = p;}); } //the function call below is the action I want to occur after the object is populated. PopulateGroups(); } };

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• Render view in higher script path with Zend Framework

  - by sander

  Lets assume the following code within a controller: $this->view->addScriptPath('dir1/views/scripts'); $this->view->addScriptPath('dir2/views/scripts'); $this->render('index.phtml'); Where dir1/views/scripts contains 2 files: -index.phtml -table.phtml And dir2/views/scripts: -table.phtml Now, it will render the index.phtml in dir1 since dir 2 doesn't have an index.phtml. Index.phtml looks something like: <somehtml> <?= $this->render('table.phtml') ?> </somehtml> This is where the confusion starts for me. I would expect it to render the table.phtml in the last directory added to the script path stack, but it doesn't. Is there a simple solution/explanation to my problem?

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• How to manage orientation in iPad app

  - by Annie

  I have added a image on navigationcontroller in appdelagte class. and set yes in - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { loginViewController = [[LoginViewController alloc]initWithNibName:@"LoginViewController" bundle:nil]; [self.window addSubview:_navController.view]; _navController.navigationBarHidden = NO; navimage = [[UIImageView alloc] init]; navimage.frame = CGRectMake(300, 18, 177, 47); navimage.image = [UIImage imageNamed: @"logo.png"]; [_navController.view addSubview:navimage]; [self.window makeKeyAndVisible]; return YES; } - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation{ return YES; } But navigation image position is not changing. The frame remains same in both modes. Please give me idea how it will be solved in the case of navigation controller image.

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• Spring Hibernate Integration

  - by Aj

  I am new to Spring Hibernate. I was trying Spring Hibernate integration tutorial from http://www.vaannila.com/spring/spring-hibernate-integration-1.html and i was able to run the example.This example deals with one table. Now i am trying with one more table. I have few question As per my understanding we need to add following things DAOinterface DAOimpl table POJO so Is this the only way to add more tables ? Do we need to add one more controller for the new table if it belongs to new form. How we will add this new table entry to dispatcher-servlet.xml Thanks in advance.

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• File listing with ActiveX

  - by Studer

  I need to program a simple Windows Explorer that only lists all files inside a folder recursively. The only solution I found up to now is using an ActiveX controller. So, I installed Visual Studio 2010, but I don't know really how to use it to make an ActiveX. I tried to create a Class Library then add a Explorer module. It compiles, but I don't know what to do now. Is there an easier way to do this or am I missing something ?

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• ActiveRecordStore InvalidAuthenticityToken

  - by Andy

  I have recently been using cookie store and I want to transition to active record store. However I keep getting an invalid authenticity token. After deleting my cookies, I was able to access the page just fine, but I don't want all my users to come to my page, get a huge error and then figure out that I want them to delete their cookies. So I made a function called delete cookies: after_filter :delete_cookie def delete_cookie puts "deleting cookies" cookies.to_hash.each_pair do |k, v| puts k cookies.delete(k) end end In application controller, but it doesn't seem to be working correctly. I still see my cookie after visiting any page. I feel like there really should be a better solution but I can't seem to find any so far. Any hints?

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• Best practice in Rails when editing scaffold made pages

  - by abegbg

  I have a best practice question. I have two classes, company and category. They have a many-to-many relationship. When clicking a category I shall go to a page showing all companies with the chosen category. Pretty straight forward. My question is: Should I list all the companies on the companies/index.html.erb after filtering the companies in the controller? or Should I list all the companies on the categories/show.html.erb page? or Should I do a completely new page, since it doesn't really fit into any of the two above? Do you generally make a new page when your goal doesn't fit the scaffold made pages or do you use them quite freely? I am working/learning alone with rails, so there are a lot of best practice questions popping up all the time. Cheers Carl

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• How do I change the UIView programmatically?

  - by user317834

  I have created View A and View B. My window has View A displayed on the screen. I also have a UIButton on View A. I want to switch from View A to View B when I click on the Button. I am not using any UIViewController. Is it possible to switch the views without using controller? I am calling buttonAction method on TOUCHUPINSIDE The problem is that it doesn't do anything when I say [ViewA removeFromSuperView]; What should I do now?

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