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  • Web Services Primer for a WinForms Developer?

    - by Unicorns
    I've been writing client/server applications with Winforms for about six years now, but I have yet to venture into the web space (neither ASP.NET nor web services). Given the direction that the job market has been heading for some time and the fact that I have a basic curiosity, I'd like to get involved with writing web services, but I don't know where to start. I've read about various options (XML/SOAP vs. JSON, REST vs...well, actually I don't know what it's called, etc.), but I'm not sure what sort of criteria are in play when making the determination to use one or the other. Obviously, I'd like to leverage the tools that I have (Visual Studio, the .NET framework, etc.) without hamstringing myself into only targeting a particular audience (i.e. writing the service in such a way as to make it difficult to consume from a Windows Mobile/Android/iPhone client, for example). For the record, my plan--for now--is to use WCF for my web service development, but I'm open to using another .NET approach if that's advisable. I realize that this question is pretty open-ended so it may get closed, but here are some things I'm wondering: What are some things to consider when choosing the type of web service (REST, etc.) I intend to write? Is it possible (and, if so, feasible) to move from one approach to another? Can web services be written in an event-driven way? As I said I'm a Winforms developer, so I'm used to objects raising events for me to react to. For instance, if I have two clients connected to my service, is there a way for me to "push" information to one of them as a result of an action by the other? If this is possible, is this advisable or am I just not thinking about it correctly? What authentication mechanisms seem to work best for public-facing services? What about if I plan to have different types of OS'es and clients connecting to the service? Is there a generally accepted platform-agnostic approach? In the line of authentication, is this something that I should be doing myself (authenticating an managing sessions, etc.) or is this something should be handled at the framework level and I just define exactly how it should work? If that's the case, how do I tell who the requester has authenticated themselves as? I started writing an authentication mechanism (simple username/password combinations stored in the database and a corresponding session table with a GUID key) within my service and just requiring that key to be passed with every operation (other than logging in, of course), but I want to make sure that I'm not reinventing the wheel here. However, I also don't want to clutter up the server with a bunch of machine user accounts just to use Basic authentication. I'm also under the impression that Digest (and of course Windows) authentication requires a machine (or AD) user account.

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  • JSON and WebOS simple example?

    - by user558361
    I have been following this tutorial http://tinyurl.com/327p325 which has been GREAT up until this point where I can't get his code to work. I get the list working with static items but I can't get it to work with the json items. I've tried to simplify it with what I really want it to do to try and debug what is wrong (also if someone could please tell me how to view the Mojo log that would be awesome) In the tutorial he has to use the yahoo service to convert the site into json data, while the site I want to interact with already has json data generated so this is what I have PageAssistant.prototype.setup = function() { this.myListModel = { items : [] }; this.myListAttr = { itemTemplate: "page/itemTemplate", renderLimit: 20, }; this.controller.setupWidget("MyList",this.myListAttr,this.myListModel); this.controller.setupWidget("search_divSpinner", { spinnerSize : "large" }, { spinning: true } ); }; PageAssistant.prototype.activate = function(event) { this.getData(); }; PageAssistant.prototype.getData = function () { // the spinner doesn't show up at all $("search_divScrim").show(); var url = "http://www.website.com/.json"; var request = new Ajax.Request(url, { method: 'get', asynchronous: true, evalJSON: "false", onSuccess: this.parseResult.bind(this), on0: function (ajaxResponse) { // connection failed, typically because the server is overloaded or has gone down since the page loaded Mojo.Log.error("Connection failed"); }, onFailure: function(response) { // Request failed (404, that sort of thing) Mojo.Log.error("Request failed"); }, onException: function(request, ex) { // An exception was thrown Mojo.Log.error("Exception"); }, }); } PageAssistant.prototype.parseResult = function (transport){ var newData = []; var theStuff=transport.responseText; try { var json = theStuff.evalJSON(); } catch(e) { Mojo.Log.error(e); } // this is where I believe I am wrong for (j=0;j < json.data.count;j++) { var thread=json.data.children[j]; newData[j] = { title: thread.data.author }; } this.myListModel["items"] = newData; this.controller.modelChanged(this.myListModel , this); $("search_divScrim").hide(); } So where I commented that I believe I am wrong I am just trying to get the title out of this json data { kind: Listing data: { children: [ { kind: food data: { author: Foodmaster hidden: false title: You should eat this } }, // then it repeats with the kind: and data Anyone see where I went wrong? I would like to know how to view the log as I have log events but can't figure out where to look to see if any of them are being thrown.

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  • closing MQ connection

    - by OakvilleWork
    Good afternoon, I wrote a project to Get Park Queue Info from the IBM MQ, it has producing an error when attempting to close the connection though. It is written in java. Under application in Event Viewer on the MQ machine it displays two errors. They are: “Channel program ended abnormally. Channel program ‘system.def.surconn’ ended abnormally. Look at previous error messages for channel program ‘system.def.surconn’ in the error files to determine the cause of the failure. The other message states: “Error on receive from host rnanaj (10.10.12.34) An error occurred receiving data from rnanaj (10.10.12.34) over tcp/ip. This may be due to a communications failure. The return code from tcp/ip recv() call was 10054 (X’2746’). Record these values.” This must be something how I try to connect or close the connection, below I have my code to connect and close, any ideas?? Connect: _logger.info("Start"); File outputFile = new File(System.getProperty("PROJECT_HOME"), "run/" + this.getClass().getSimpleName() + "." + System.getProperty("qmgr") + ".txt"); FileUtils.mkdirs(outputFile.getParentFile()); Connection jmsConn = null; Session jmsSession = null; QueueBrowser queueBrowser = null; BufferedWriter commandsBw = null; try { // get queue connection MQConnectionFactory MQConn = new MQConnectionFactory(); MQConn.setHostName(System.getProperty("host")); MQConn.setPort(Integer.valueOf(System.getProperty("port"))); MQConn.setQueueManager(System.getProperty("qmgr")); MQConn.setChannel("SYSTEM.DEF.SVRCONN"); MQConn.setTransportType(JMSC.MQJMS_TP_CLIENT_MQ_TCPIP); jmsConn = (Connection) MQConn.createConnection(); jmsSession = jmsConn.createSession(false, Session.AUTO_ACKNOWLEDGE); Queue jmsQueue = jmsSession.createQueue("PARK"); // browse thru messages queueBrowser = jmsSession.createBrowser(jmsQueue); Enumeration msgEnum = queueBrowser.getEnumeration(); commandsBw = new BufferedWriter(new FileWriter(outputFile)); // String line = "DateTime\tMsgID\tOrigMsgID\tCorrelationID\tComputerName\tSubsystem\tDispatcherName\tProcessor\tJobID\tErrorMsg"; commandsBw.write(line); commandsBw.newLine(); while (msgEnum.hasMoreElements()) { Message message = (Message) msgEnum.nextElement(); line = dateFormatter.format(new Date(message.getJMSTimestamp())) + "\t" + message.getJMSMessageID() + "\t" + message.getStringProperty("pkd_orig_jms_msg_id") + "\t" + message.getJMSCorrelationID() + "\t" + message.getStringProperty("pkd_computer_name") + "\t" + message.getStringProperty("pkd_subsystem") + "\t" + message.getStringProperty("pkd_dispatcher_name") + "\t" + message.getStringProperty("pkd_processor") + "\t" + message.getStringProperty("pkd_job_id") + "\t" + message.getStringProperty("pkd_sysex_msg"); _logger.info(line); commandsBw.write(line); commandsBw.newLine(); } } Close: finally { IO.close(commandsBw); if (queueBrowser != null) { try { queueBrowser.close();} catch (Exception ignore) {}} if (jmsSession != null) { try { jmsSession.close();} catch (Exception ignore) {}} if (jmsConn != null) { try { jmsConn.stop();} catch (Exception ignore) {}} }

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  • How do I recover from an unchecked exception?

    - by erickson
    Unchecked exceptions are alright if you want to handle every failure the same way, for example by logging it and skipping to the next request, displaying a message to the user and handling the next event, etc. If this is my use case, all I have to do is catch some general exception type at a high level in my system, and handle everything the same way. But I want to recover from specific problems, and I'm not sure the best way to approach it with unchecked exceptions. Here is a concrete example. Suppose I have a web application, built using Struts2 and Hibernate. If an exception bubbles up to my "action", I log it, and display a pretty apology to the user. But one of the functions of my web application is creating new user accounts, that require a unique user name. If a user picks a name that already exists, Hibernate throws an org.hibernate.exception.ConstraintViolationException (an unchecked exception) down in the guts of my system. I'd really like to recover from this particular problem by asking the user to choose another user name, rather than giving them the same "we logged your problem but for now you're hosed" message. Here are a few points to consider: There a lot of people creating accounts simultaneously. I don't want to lock the whole user table between a "SELECT" to see if the name exists and an "INSERT" if it doesn't. In the case of relational databases, there might be some tricks to work around this, but what I'm really interested in is the general case where pre-checking for an exception won't work because of a fundamental race condition. Same thing could apply to looking for a file on the file system, etc. Given my CTO's propensity for drive-by management induced by reading technology columns in "Inc.", I need a layer of indirection around the persistence mechanism so that I can throw out Hibernate and use Kodo, or whatever, without changing anything except the lowest layer of persistence code. As a matter of fact, there are several such layers of abstraction in my system. How can I prevent them from leaking in spite of unchecked exceptions? One of the declaimed weaknesses of checked exceptions is having to "handle" them in every call on the stack—either by declaring that a calling method throws them, or by catching them and handling them. Handling them often means wrapping them in another checked exception of a type appropriate to the level of abstraction. So, for example, in checked-exception land, a file-system–based implementation of my UserRegistry might catch IOException, while a database implementation would catch SQLException, but both would throw a UserNotFoundException that hides the underlying implementation. How do I take advantage of unchecked exceptions, sparing myself of the burden of this wrapping at each layer, without leaking implementation details?

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  • impress.js Navigation with active class

    - by ArtGoddess
    I would like to use impress.js in order to make a website, with a navigation bar. In each slide, the corresponding anchor or div must have an "active" class, in order to achieve a different link appearance. I have followed all instructions provided here: https://github.com/Ralt/impress.js/commit/f88feb8cae704ce27bd2168bdb77768f516ac2da#L2R605 but the "active" class on the correct menu must be added. This is the code that generates the menu items. How can I add for example the "active" class in the first link? /* ************************ MENU ***************************** */ // Capitalize first letter of string // @see http://stackoverflow.com/a/1026087/851498 var capitalize = function( str ) { return str.charAt(0).toUpperCase() + str.slice(1); } // `showMenu` API function creates the menu // It defines the names of each entry by the id capitalized. var showMenu = function() { // Create the menu wrapper and the element that will be cloned // for each entry. var menu = document.createElement('div'), el = document.createElement('div'); // Apply some classes menu.className = 'menu'; el.className = 'menu-item'; // Create an element that will be the "button" and append it // to the menu var button = document.createElement('div'); button.className = 'menu-button'; button.textContent = 'Menu'; menu.appendChild(button); // Now, for each div in #impress, add an entry to the menu [].forEach.call(byId('impress').firstElementChild.children, function( child, index ) { var newEl = el.cloneNode(), i = index + 1, text = i + '. ' + capitalize(child.id); // Set the text of the new element newEl.textContent = text; // Add an onclick event to the new element // We need to use a closure to make sure the index is correct (function( index ) { newEl.addEventListener('click', function() { goto(index); }); }( index )); // And append the new element to the menu menu.appendChild(newEl); }); // And append the menu to #impress document.body.appendChild(menu); }; Then, in each click it must be removed the active class on the current, and add it to the clicked element. // Remove the active class from the current active document.querySelector( '.active' )[ 0 ].classList.remove( 'active' ); // And add it to the clicked index byId('impress').firstElementChild.children[ index ].classList.add( 'active' ); Where do I have to apply this code? Thank you!

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  • Reliable session faulting for unknown reason

    - by Scarfman007
    I am trying to achieve the following - one client-side proxy instance (kept open) accessed by multiple threads using a reliable session. What I have managed so far is to have either A) a reliable session with a client-side proxy which is created and disposed per call or B) what I aim for, but without a reliable session. When I enable reliable sessions on my binding however, the following behaviour is exhibited: Client-side Upon application startup everything appears to work fine until roughly 18 messages in to the WCF session. I firstly get the proxy.InnerChannel.Faulted event raised, then an exception is caught at the point where I am calling the method on the proxy. The exception is a System.TimeoutException, with message: "The request channel timed out while waiting for a reply after 00:00:59.9062512. Increase the timeout value passed to the call to Request or increase the SendTimeout value on the Binding. The time allotted to this operation may have been a portion of a longer timeout." The inner exception has a similar message: "The request operation did not complete within the allotted timeout of 00:01:00. The time allotted to this operation may have been a portion of a longer timeout." With the method at the top of the inner stack trace being: System.ServiceModel.Channels.ReliableRequestSessionChannel.SyncRequest.WaitForReply(TimeSpan timeout) I then call proxy.Close followed by proxy.Abort (catching and ignoring exceptions). If I utilize the default settings (i.e. have simply <reliableSession/>), then calling proxy. Close results in another System.Timeout exception (although this time the allotted timeout is 00:00:00), however if I override the defaults as specified above no exception is thrown. Service-side Utilizing WCF tracing I get a System.ServiceModel.CommunicationException, with message: "The sequence has been terminated by the remote endpoint. The session has stopped waiting for a particular reply. Because of this the reliable session cannot continue. The reliable session was faulted." And a stack trace ending at: System.ServiceModel.AsyncResult.End[TAsyncResult](IAsyncResult result) When remotely attaching to the server I get the same message, which occurs when code execution steps over the return statement of my service in the service call which causes the error. The puzzling thing to me is that the service is stable and runs with options A) or B) as decribed at the beginning of my post, and occurs after a varying number of messages (around 18). The former fact points to there being nothing wrong with the code (indeed I have checked that no exceptions are thrown), and the latter just serves to confuse me and is why I modified the settings on the reliable session binding. I am quite stuck on this. Can anyone suggest why the reliable session would fault in such a way?

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  • Get latlng and draw a polyline between that two latlng

    - by anup sharma
    I have some issue in my code in that first I want to get latlng of my given address/city name from two text boxes after that i converts it to from position's latlng and to position's latlng and at last i want to draw a polyline between these point and markers on both point also, But now i am trying to draw a line between these points. But still not working this code also no any error in console also. code is here for your help. function getRoute(){ var from_text = document.getElementById("travelFrom").value; var to_text = document.getElementById("travelTo").value; if(from_text == ""){ alert("Enter travel from field") document.getElementById("travelFrom").focus(); } else if(to_text == ""){ alert("Enter travel to field"); document.getElementById("travelTo").focus(); } else{ //google.maps.event.addListener(map, "", function (e) { var myLatLng = new google.maps.LatLng(28.6667, 77.2167); var mapOptions = { zoom: 3, center: myLatLng, mapTypeId: google.maps.MapTypeId.TERRAIN }; var map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions); var geocoder = new google.maps.Geocoder(); var address1 = from_text; var address2 = to_text; var from_latlng,to_latlng; //var prepath = path; //if(prepath){ // prepath.setMap(null); //} geocoder.geocode( { 'address': address1}, function(results, status) { if (status == google.maps.GeocoderStatus.OK) { // do something with the geocoded result // alert(results[0].geometry.location); from_latlng = results[0].geometry.location; // from_lat = results[0].geometry.location.latitude; // from_lng = results[0].geometry.location.longitude; // alert(from_latlng); } }); geocoder.geocode( { 'address': address2}, function(results, status) { if (status == google.maps.GeocoderStatus.OK) { // do something with the geocoded result to_latlng = results[0].geometry.location; // to_lat = results[0].geometry.location.latitude; // to_lng = results[0].geometry.location.longitude; // results[0].geometry.location.longitude // alert(to_latlng) } }); setTimeout(function(){ var flightPlanCoordinates = [ new google.maps.LatLng(from_latlng), new google.maps.LatLng(to_latlng) ]; //alert("123") var polyline; polyline = new google.maps.Polyline({ path: flightPlanCoordinates, strokeColor: "#FF0000", strokeOpacity: 1.0, strokeWeight: 2 }); polyline.setMap(map); // assign to global var path // path = polyline; },4000); // }); } }

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  • USB windows xp final USB access issues

    - by Lex Dean
    I basically understand you C++ people, Please do not get distracted because I'm writing in Delphi. I have a stable USB Listing method that accesses all my USB devices I get the devicepath, and this structure: TSPDevInfoData = packed record Size: DWORD; ClassGuid: TGUID; DevInst: DWORD; // DEVINST handle Reserved: DWord; end; I get my ProductID and VenderID successfully from my DevicePath Lists all USB devices connected to the computer at the time That enables me to access the registry data to each device in a stable way. What I'm lacking is a little direction Is friendly name able to be written inside the connected USB Micro chips by the firmware programmer? (I'm thinking of this to identify the device even further, or is this to help identify Bulk data transfer devices like memory sticks and camera's) Can I use SPDRP_REMOVAL_POLICY_OVERRIDE to some how reset these polices What else can I do with the registry details. Identifying when some one unplugs a device The program is using (in windows XP standard) I used a documented windows event that did not respond. Can I read a registry value to identify if its still connected? using CreateFileA (DevicePath) to send and receive data I have read when some one unplugs in the middle of a data transfer its difficult clearing resources. what can IoCreateDevice do for me and how does one use it for that task This two way point of connection status and system lock up situations is very concerning. Has some one read anything about this subject recently? My objectives are to 1. list connected USB devices identify a in development Micro Controller from everything else send and receive data in a stable and fast way to the limits of the controller No lock up's transferring data Note I'm not using any service packs I understand everything USB is in ANSI when windows xp is not and .Net is all about ANSI (what a waste of memory) I plan to continue this project into a .net at a later date as an addition. MSDN gives me Structures and Functions and what should link to what ok but say little to what they get used for. What is available in my language Delphi is way over priced that it needs a major price drop.

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  • XmlHttpRequest bug?

    - by valdo
    Hello all. I'm writing a program that among other things needs to download a file given its URL. I'm too lazy to implement the Http/Https protocols manually, so that I needed some library/object/function that'll do the job. Critical requirement: The download must be asynchronous. That is, the thread that issued the download must be able to do something else "while" downloading the file, plus the download must be able to be aborted anytime without any barbaric side effects (such as internal call to TerminateThread). Nice-to-have requirements: Should be able to download the file "into memory". Means - read the contents of the file as they arrive, not necessarily save it into some "file system" file. It'd be nice to have some convenient Win32 progress notification mechanism (waitable event, semahpore, completion port, etc.), rather than just periodically polling the download status. I've chosen the XmlHttpRequest COM object to do the work. It seemed to work fine enough, plus it supported asynchronous mode. However I noticed that after some period it just stops working. That is, after several successful file downloads it stops downloading anything. I periodically poll it to get its status, it reports "in-progress", but nothing actually happens, and there's no network activity. Moreover, when the same process creates another instance of XmlHttpRequest object to perform new downloads - the effect is the same. The object reports "in progress", whereas it doesn't even try to connect to the server (according to network sniffers and system TCP state). The only way to make this object work back is to restart the process. This makes me suspect that there's a sort of a bug (sorry, I meant undocumented feature) in the object. Also it's not a bug at the level of an individual object, since the problem persists when the object is destroyed and another one is created. It's probably some global state of the DLL that implements this object. Does anyone know something about this? Is this a known bug? I'm pretty sure there's no chance that I have another bug in my code, because of which it seems to me to be the bug is in the XmlHttpRequest. I've done enoughtests and spent time with the debugger to conclude without reasonable doubt that it's just the object stops working. BTW, while the object should work, I do all the waiting via MsgWaitXXXX API calls. So that if this object needs the message loop to work properly (for instance, it may create a hidden notification window and bind it to a socket via WSAAsyncSelect) - I give it the opportunity.

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  • How to do the processing and keep GUI refreshed using databinding?

    - by macias
    History of the problem This is continuation of my previous question How to start a thread to keep GUI refreshed? but since Jon shed new light on the problem, I would have to completely rewrite original question, which would make that topic unreadable. So, new, very specific question. The problem Two pieces: CPU hungry heavy-weight processing as a library (back-end) WPF GUI with databinding which serves as monitor for the processing (front-end) Current situation -- library sends so many notifications about data changes that despite it works within its own thread it completely jams WPF data binding mechanism, and in result not only monitoring the data does not work (it is not refreshed) but entire GUI is frozen while processing the data. The aim -- well-designed, polished way to keep GUI up to date -- I am not saying it should display the data immediately (it can skip some changes even), but it cannot freeze while doing computation. Example This is simplified example, but it shows the problem. XAML part: <StackPanel Orientation="Vertical"> <Button Click="Button_Click">Start</Button> <TextBlock Text="{Binding Path=Counter}"/> </StackPanel> C# part (please NOTE this is one piece code, but there are two sections of it): public partial class MainWindow : Window,INotifyPropertyChanged { // GUI part public MainWindow() { InitializeComponent(); DataContext = this; } private void Button_Click(object sender, RoutedEventArgs e) { var thread = new Thread(doProcessing); thread.IsBackground = true; thread.Start(); } // this is non-GUI part -- do not mess with GUI here public event PropertyChangedEventHandler PropertyChanged; public void OnPropertyChanged(string property_name) { if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs(property_name)); } long counter; public long Counter { get { return counter; } set { if (counter != value) { counter = value; OnPropertyChanged("Counter"); } } } void doProcessing() { var tmp = 10000.0; for (Counter = 0; Counter < 10000000; ++Counter) { if (Counter % 2 == 0) tmp = Math.Sqrt(tmp); else tmp = Math.Pow(tmp, 2.0); } } } Known workarounds (Please do not repost them as answers) Those two first are based on Jon ideas: pass GUI dispatcher to library and use it for sending notifications -- why it is ugly? because it could be no GUI at all give up with data binding COMPLETELY (one widget with databinding is enough for jamming), and instead check from time to time data and update the GUI manually -- well, I didn't learn WPF just to give up with it now ;-) and this is mine, it is ugly, but simplicity of it kills -- before sending notification freeze a thread -- Thread.Sleep(1) -- to let the potential receiver "breathe" -- it works, it is minimalistic, it is ugly though, and it ALWAYS slows down computation even if no GUI is there So... I am all ears for real solutions, not some tricks.

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  • jQuery bind efficiency

    - by chelfers
    I'm having issue with load speed using multiple jQuery binds on a couple thousands elements and inputs, is there a more efficient way of doing this? The site has the ability to switch between product lists via ajax calls, the page cannot refresh. Some lists have 10 items, some 100, some over 2000. The issue of speed arises when I start flipping between the lists; each time the 2000+ item list is loaded the system drags for about 10 seconds. Before I rebuild the list I am setting the target element's html to '', and unbinding the two bindings below. I'm sure it has something to do with all the parent, next, and child calls I am doing in the callbacks. Any help is much appreciated. loop 2500 times <ul> <li><input type="text" class="product-code" /></li> <li>PROD-CODE</li> ... <li>PRICE</li> </ul> end loop $('li.product-code').bind( 'click', function(event){ selector = '#p-'+ $(this).prev('li').children('input').attr('lm'); $(selector).val( ( $(selector).val() == '' ? 1 : ( parseFloat( $(selector).val() ) + 1 ) ) ); Remote.Cart.lastProduct = selector; Remote.Cart.Products.Push( Remote.Cart.customerKey, { code : $(this).prev('li').children('input').attr('code'), title : $(this).next('li').html(), quantity : $('#p-'+ $(this).prev('li').children('input').attr('lm') ).val(), price : $(this).prev('li').children('input').attr('price'), weight : $(this).prev('li').children('input').attr('weight'), taxable : $(this).prev('li').children('input').attr('taxable'), productId : $(this).prev('li').children('input').attr('productId'), links : $(this).prev('li').children('input').attr('productLinks') }, '#p-'+ $(this).prev('li').children('input').attr('lm'), false, ( parseFloat($(selector).val()) - 1 ) ); return false; }); $('input.product-qty').bind( 'keyup', function(){ Remote.Cart.lastProduct = '#p-'+ $(this).attr('lm'); Remote.Cart.Products.Push( Remote.Cart.customerKey, { code : $(this).attr('code') , title : $(this).parent().next('li').next('li').html(), quantity : $(this).val(), price : $(this).attr('price'), weight : $(this).attr('weight'), taxable : $(this).attr('taxable'), productId : $(this).attr('productId'), links : $(this).attr('productLinks') }, '#p-'+ $(this).attr('lm'), false, previousValue ); });

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  • MVC pattern implementation. What is the n-relation between its components

    - by Srodriguez
    Dear all, I'm working in a C# project and we are , in order to get some unity across the different parts of our UI, trying to use the MVC pattern. The client is windows form based and I'm trying to create a simple MVC pattern implementation. It's been more challenging than expected, but I still have some questions regarding the MVC pattern. The problem comes mostly from the n-n relationships between its components: Here is what I've understood, but I'm not sure at all of it. Maybe someone can correct me? Model: can be shared among different Views. 1-n relationship between Model-View View: shows the state of the model. only one controller (can be shared among different views?). 1-1 relationship with the Model, 1-1 relationship with the controller Controller: handles the user actions on the view and updates the model. One controller can be shared among different views, a controller interacts only with one model? I'm not sure about the two last ones: Can a view have several controller? Or can a view share a controller with another view? Or is it only a 1:1 relationship? Can a controller handle several views? can it interact with several models? Also, I take advantage of this question to ask another MVC related question. I've suppressed all the synchronous calls between the different members of the MVC, making use of the events and delegates. One last call is still synchronous and is actually the most important one: The call between the view and the controller is still synchronous, as I need to know rather the controller has been able to handle the user's action or not. This is very bad as it means that I could block the UI thread (hence the client itself) while the controller is processing or doing some work. How can I avoid this? I can make use of the callback but then how do i know to which event the callback comes from? PS: I can't change the pattern at this stage, so please avoid answers of type "use MVP or MVVC, etc ;) Thanks!

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  • MVC pattern implementation. What is the n-relation between its components

    - by Srodriguez
    Dear all, I'm working in a C# project and we are , in order to get some unity across the different parts of our UI, trying to use the MVC pattern. The client is windows form based and I'm trying to create a simple MVC pattern implementation. It's been more challenging than expected, but I still have some questions regarding the MVC pattern. The problem comes mostly from the n-n relationships between its components: Here is what I've understood, but I'm not sure at all of it. Maybe someone can correct me? Model: can be shared among different Views. 1-n relationship between Model-View View: shows the state of the model. only one controller (can be shared among different views?). 1-1 relationship with the Model, 1-1 relationship with the controller Controller: handles the user actions on the view and updates the model. One controller can be shared among different views, a controller interacts only with one model? I'm not sure about the two last ones: Can a view have several controller? Or can a view share a controller with another view? Or is it only a 1:1 relationship? Can a controller handle several views? can it interact with several models? Also, I take advantage of this question to ask another MVC related question. I've suppressed all the synchronous calls between the different members of the MVC, making use of the events and delegates. One last call is still synchronous and is actually the most important one: The call between the view and the controller is still synchronous, as I need to know rather the controller has been able to handle the user's action or not. This is very bad as it means that I could block the UI thread (hence the client itself) while the controller is processing or doing some work. How can I avoid this? I can make use of the callback but then how do i know to which event the callback comes from? PS: I can't change the pattern at this stage, so please avoid answers of type "use MVP or MVVC, etc ;) Thanks!

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  • can not access MovieClip properties in flashDevelop

    - by numerical25
    I know there is something I am doing wrong. In my controls I have keydown events that control my hero. As of right now, I am trying to rotate my hero but he refuses to turn . Below is my Hero Class, my control class, and gameobject class. pretty much all the classes associate with the controls class. package com.Objects { import com.Objects.GameObject; /** * ... * @author Anthony Gordon */ [Embed(source='../../../bin/Assets.swf', symbol='OuterRim')] public class Hero extends GameObject { public function Hero() { } } } Here is my Controls class. This is the class where I am trying to rotate my hero but he doesnt. The keydown event does work cause I trace it. package com.Objects { import com.Objects.Hero; import flash.events.*; import flash.display.MovieClip; /** * ... * @author Anthony Gordon */ public class Controls extends GameObject { private var aKeyPress:Array; public var ship:Hero; public function Controls(ship:Hero) { this.ship = ship; IsDisplay = false; aKeyPress = new Array(); engine.sr.addEventListener(KeyboardEvent.KEY_DOWN, keyDownListener); engine.sr.addEventListener(KeyboardEvent.KEY_UP,keyUpListener); } private function keyDownListener(e:KeyboardEvent):void { //trace("down e.keyCode=" + e.keyCode); aKeyPress[e.keyCode] = true; trace(e.keyCode); } private function keyUpListener(e:KeyboardEvent):void { //trace("up e.keyCode=" + e.keyCode); aKeyPress[e.keyCode]=false; } override public function UpdateObject():void { Update(); } private function Update():void { if (aKeyPress[37])//Key press left ship.rotation += 3,trace(ship.rotation ); ///DOESNT ROtate }//End Controls } } Here is GameObject Class package com.Objects { import com.Objects.Engine; import com.Objects.IGameObject; import flash.display.MovieClip; /** * ... * @author Anthony Gordon */ public class GameObject extends MovieClip implements IGameObject { private var isdisplay:Boolean = true; private var garbage:Boolean; public static var engine:Engine; public var layer:Number = 0; public function GameObject() { } public function UpdateObject():void { } public function GarbageCollection():void { } public function set Garbage(garb:Boolean):void { garbage = garb; } public function get Garbage():Boolean { return garbage } public function get IsDisplay():Boolean { return isdisplay; } public function set IsDisplay(display:Boolean):void { isdisplay = display; } public function set Layer(l:Number):void { layer = l; } public function get Layer():Number { return layer } } }

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  • How to retrieve parent container ID after sorting using Jquery sortable??

    - by user187580
    Hello I have following markup and javascript to sort some items. Items can be sorted within a block or across other blocks. It works but I have a problem in retrieving correct block ID after an item is moved from one block to another. For example, if I move item 1 within "Block 1", I get "I am in Block= block_1" but if I move Item 1 to Block 2 I still get I am in Block 1. But I want to make the block 2 as its parent container. I need to retrieve this id so that I can do some ajax and update the db accordingly. Can you please help me correct this?? <div id="blocks_sortable"> <div id="block_1"> <h2>Block 1</h2> <div class="items_sortable connectedSortable"> <div id="item_1"> <span>Item 1</span></div> <div id="item_2"> <span>Item 2</span></div> <div id="item_3"> <span>Item 3</span></div> </div> </div> <div id="block_2"> <h2>Block 2</h2> <div class="items_sortable connectedSortable"> <div id="item_4"> <span>Item 4</span></div> <div id="item_5"> <span>Item 5</span></div> <div id="item_6"> <span>Item 6</span></div> </div> </div> </div> <script> $("#blocks_sortable").sortable({ }); $(".items_sortable").sortable({ connectWith: '.connectedSortable' , forcePlaceholderSize: true , stop : function(event, ui){ alert("I am in block = "+$(this).parent().attr("id")); } }).disableSelection(); </script> Thank you.

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  • MVC Bootstrap: Autocomplete doesn't show properly

    - by kicked11
    I have a MVC website and it had a searchbox with autocomplete, now I changed the layout using bootstrap. But now the autocomplete isn't been shown correctly anymore. See the picture the suggestions are not shown right. the autocomplete goes through the text. I was fine before I used bootstrap. I am using a SQL server to get the data and this is js file (I'm not good at ajax, i took it from a tutorial I followed) $(function () { var ajaxFormSubmit = function () { var $form = $(this); var options = { url: $form.attr("action"), type: $form.attr("method"), data: $form.serialize() }; $.ajax(options).done(function (data) { var $target = $($form.attr("data-aptitude-target")); var $newHtml = $(data); $target.replaceWith($newHtml); $newHtml.show("slide", 200); }); return false; }; var submitAutocompleteForm = function (event, ui) { var $input = $(this); $input.val(ui.item.label); var $form = $input.parents("form:first"); $form.submit(); }; var createAutocomplete = function () { var $input = $(this); var options = { source: $input.attr("data-aptitude-autocomplete"), select: submitAutocompleteForm }; $input.autocomplete(options); }; $("form[data-aptituder-ajax='true']").submit(ajaxFormSubmit); $("input[data-aptitude-autocomplete]").each(createAutocomplete); }); this is the form in my view <form method="get" action="@Url.Action("Index")" data-aptitude-ajax="true" data-aptitude-target="#testList"> <input type="search" name="searchTerm" data-aptitude-autocomplete="@Url.Action("Autocomplete")" /> <input type="submit" value=Search /> And this is part of the controller of the view public ActionResult Autocomplete(string term) { var model = db.tests .Where(r => term == null || r.name.Contains(term)) .Select(r => new { label = r.name }); return Json(model, JsonRequestBehavior.AllowGet); } // // GET: /Test/ public ActionResult Index(string searchTerm = null) { var model = db.tests .Where(r => searchTerm == null || r.name.StartsWith(searchTerm)); if (Request.IsAjaxRequest()) { return PartialView("_Test", model); } return View(model); } I'm new to ajax as well as bootstrap 3. I got the searchfunction and autocomplete from a tutorial I followed. Anybody any idea on how to fix this, because it worked fine? Thanks in advance!

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  • Large File Download - Connection With Server Reset

    - by daveywc
    I have an asp.net website that allows the user to download largish files - 30mb to about 60mb. Sometimes the download works fine but often it fails at some varying point before the download finishes with the message saying that the connection with the server was reset. Originally I was simply using Server.TransmitFile but after reading up a bit I am now using the code posted below. I am also setting the Server.ScriptTimeout value to 3600 in the Page_Init event. private void DownloadFile(string fname, bool forceDownload) { string path = MapPath(fname); string name = Path.GetFileName(path); string ext = Path.GetExtension(path); string type = ""; // set known types based on file extension if (ext != null) { switch (ext.ToLower()) { case ".mp3": type = "audio/mpeg"; break; case ".htm": case ".html": type = "text/HTML"; break; case ".txt": type = "text/plain"; break; case ".doc": case ".rtf": type = "Application/msword"; break; } } if (forceDownload) { Response.AppendHeader("content-disposition", "attachment; filename=" + name.Replace(" ", "_")); } if (type != "") { Response.ContentType = type; } else { Response.ContentType = "application/x-msdownload"; } System.IO.Stream iStream = null; // Buffer to read 10K bytes in chunk: byte[] buffer = new Byte[10000]; // Length of the file: int length; // Total bytes to read: long dataToRead; try { // Open the file. iStream = new System.IO.FileStream(path, System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.Read); // Total bytes to read: dataToRead = iStream.Length; //Response.ContentType = "application/octet-stream"; //Response.AddHeader("Content-Disposition", "attachment; filename=" + filename); // Read the bytes. while (dataToRead > 0) { // Verify that the client is connected. if (Response.IsClientConnected) { // Read the data in buffer. length = iStream.Read(buffer, 0, 10000); // Write the data to the current output stream. Response.OutputStream.Write(buffer, 0, length); // Flush the data to the HTML output. Response.Flush(); buffer = new Byte[10000]; dataToRead = dataToRead - length; } else { //prevent infinite loop if user disconnects dataToRead = -1; } } } catch (Exception ex) { // Trap the error, if any. Response.Write("Error : " + ex.Message); } finally { if (iStream != null) { //Close the file. iStream.Close(); } Response.Close(); } }

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  • How to fix the position of the button in applet

    - by user1609804
    I'm trying to make an applet that has a buttons in the right, where each button is corresponding to a certain pokemon. I already did it, but the buttons isn't fixed.they keep following the mouse. please help. This is my code: import javax.swing.*; import java.awt.image.BufferedImage; import java.io.*; import javax.imageio.ImageIO; import java.applet.*; import java.awt.event.*; import java.awt.*; public class choosePokemon extends Applet implements ActionListener { private int countPokemon; private int[] storePokemon; private int x,y; //this will be the x and y coordinate of the button BufferedImage Picture; public int getCountPokemon(){ //for other class that needs how many pokemon return countPokemon; } public int[] getStoredPokemon(){ //for other class that needs the pokemon return storePokemon; } public void init(){ x=0;y=0; try{ Picture = ImageIO.read(new File("pokeball.png")); } catch( IOException ex ){ } } public void paint( Graphics g ){ pokemon display = new pokemon(); // to access the pokemon attributes in class pokemon ButtonGroup group = new ButtonGroup(); //create a button group for( int a=0;a<16;a++ ){ // for loop in displaying the buttons of every pokemon(one pokemon, one button) display.choose( a ); //calls the method choose in which accepts an integer from 0-15 and saves the attributes of the pokemon corresponding to the integer JButton pokemonButton = new JButton( display.getName() ); // creates the button pokemonButton.setActionCommand( display.getName() ); // isasave sa actioncommand yung name ng kung ano mang pokemon pokemonButton.addActionListener(this); //isasama yung bagong gawang button sa listener para malaman kung na-click yung button pokemonButton.setBounds( x,y,50,23 ); group.add( pokemonButton ); //eto naman yung mag-aadd sa bagong gawang button sa isang group na puro buttons(button ng mga pokemon) y+=23; if( a==7 ){ x+=50; y=0; } add( pokemonButton ); //will add the button to the applet } g.drawImage( Picture, 120, 20, null ); } public void actionPerformed(ActionEvent e) { try{ //displays the picture of the selected pokemon Picture = ImageIO.read(new File( "pokemon/" + e.getActionCommand() + ".png" )); } catch( IOException ex ){ } } public boolean chosen( int PChoice ){ //this will check if the chosen pokemon is already the player's pokemon boolean flag = false; for( int x=0; x<countPokemon && !flag ;x++ ){ if( storePokemon[x]==PChoice ){ flag = true; } } return flag; }

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  • How can I make this client as a multithread client?

    - by Johanna
    Hi, I have read a lot about multithread client but for this one,I can not make it multithread! would you please help me? public class MainClient implements Runnable{ private static InformationClass info = new InformationClass(); private static Socket c; private static String text; public static String getText() { return text; } public static void setText(String text) { MainClient.text = text; } private static PrintWriter os; private static BufferedReader is; static boolean closed = false; /** * @param args the command line arguments */ public static void main(String[] args) { MainFrame farme = new MainFrame(); farme.setVisible(true); try { c = new Socket("localhost", 5050); os = new PrintWriter(c.getOutputStream(), true); is = new BufferedReader(new InputStreamReader(c.getInputStream())); } catch (UnknownHostException ex) { Logger.getLogger(MainClient.class.getName()).log(Level.SEVERE, null, ex); } catch (IOException ex) { Logger.getLogger(MainClient.class.getName()).log(Level.SEVERE, null, ex); } } public static void active() { String teXt = MainClient.getText(); System.out.println(teXt); os.println(teXt); try { String line = is.readLine(); System.out.println("Text received: " + line); os.flush(); is.close(); is.close(); c.close(); } catch (IOException ex) { Logger.getLogger(MainClient.class.getName()).log(Level.SEVERE, null, ex); } } } also active method will be called when the client write something on the text area and then clicks on the send button. 2) also i have a question that: in the other class I have this action performed for my send button,does it mean that client is multithread?? private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { new Thread(new Runnable() { @Override public void run() { // This gets run in a background thread String text = jTextArea1.getText(); jTextArea2.append(client.getCurrentName() + " : " + text + "\n"); MainClient.setText(client.getCurrentName() + " : " + text + "\n"); clear(); MainClient.active(); } }).start(); } Last EDIT: this is my active method: public static void active() { String teXt = MainClient.getText(); os.println(teXt); String line = is.readLine(); System.out.println("Text received: " + line); os.flush(); is.close(); is.close(); c.close(); }

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  • Loop through children and display each, as3

    - by VideoDnd
    How do I loop through all of my children, and display each? I would like to know the best way to do this. my children and containerfive children, one plays every sec, 1,2,3, etc. var square1:Square1 = new Square1; var square2:Square2 = new Square2; var square3:Square3 = new Square3; var square4:Square4 = new Square4; var square5:Square5 = new Square5; var container:Sprite = new Sprite; addChild(container); container.addChild(square1) container.addChild(square2) container.addChild(square3) container.addChild(square4) container.addChild(square5) my timer var timly:Timer = new Timer(1000, 5); timly.start(); timly.addEventListener(TimerEvent.TIMER, onLoop); Note: Tried for loop, numChildren -1, and visibility ERROR 'access of undefined property' //Thomas's idea var timly:Timer = new Timer(1000, 10); timly.start(); timly.addEventListener(TimerEvent.TIMER, onLoop, false, 0, true); // var square1:Square1 = new Square1; square1.visible = false container.addChild(square2) var square2:Square2 = new Square2; square2.visible = false container.addChild(square3) var square3:Square3 = new Square3; square3.visible = false container.addChild(square3) var square4:Square4 = new Square4; square4.visible = false container.addChild(square4) var square5:Square5 = new Square5; square5.visible = false container.addChild(square5) var container:Sprite = new Sprite; this.addChild(container); var curCount:Number = 100; // function collectChildren(container:DisplayObjectContainer):Array { var len:int = container.numChildren; var mySquaresArray:Array = []; for (var i:int = 0; i < len; i++) { mySquaresArray.push(container.getChildAt(i).name); } return mySquaresArray; } // function onLoop( e:Event ) { curCount = e.target.currentCount; if( curCount > 1 ) { var previous_square = curCount -2; mySquaresArray[previous_square].visible = false; } var current_square = curCount - 1; mySquaresArray[current_square].visible = true; }

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  • Child data grid is not showing the values in the page

    - by prince23
    hi, Child data grid is not showing the values in the page for the child datagrid I am binding with an list <sdk:DataGrid MinHeight="100" x:Name="contacts" Margin="51,21,88,98" RowDetailsVisibilityChanged="contacts_RowDetailsVisibilityChanged" LoadingRowDetails="contacts_LoadingRowDetails" RowDetailsVisibilityMode="VisibleWhenSelected" MouseLeftButtonUp="contacts_MouseLeftButtonUp" MouseLeftButtonDown="contacts_MouseLeftButtonDown"> <sdk:DataGrid.Columns> <sdk:DataGridTextColumn Binding="{Binding EmployeeID}" Header="ID" /> <sdk:DataGridTextColumn Binding="{Binding EmployeeFName}" Header="Fname" /> <sdk:DataGridTextColumn Binding="{Binding EmployeeLName}" Header="LName" /> <sdk:DataGridTextColumn Binding="{Binding EmployeeMailID}" Header="MailID" /> </sdk:DataGrid.Columns> <sdk:DataGrid.RowDetailsTemplate> <DataTemplate> <sdk:DataGrid x:Name="dgrdRowDetail" Width="200" AutoGenerateColumns="False" HorizontalAlignment="Center" IsReadOnly="True"> <sdk:DataGrid.Columns> <sdk:DataGridTextColumn Header="CompanyName" Binding="{Binding Company name}"/> <sdk:DataGridTextColumn Header="CompanyName" Binding="{Binding EmpID}"/> </sdk:DataGrid.Columns> </sdk:DataGrid> </DataTemplate> </sdk:DataGrid.RowDetailsTemplate> </sdk:DataGrid> I am having 2 grids "contacts" and "dgrdRowDetail" globally i have defined an variable like this:- DataGrid dgrdRowDetail; in the contacts_RowDetailsVisibilityChanged event I have this code if (e.Row.DataContext != null) { string strEmpID = ((SilverlightApplication1.DBServiceEMP.Employee)((e.DetailsElement).DataContext)).EmployeeID; dgrdRowDetail = (DataGrid)e.DetailsElement.FindName("dgrdRowDetail"); // here i am finding the child datgrid control in contacts datagrid // then in dgrdRowDetail i will be binding this grid with new values if (strEmpID != null) { int EmpID = Convert.ToInt32(strEmpID.ToString()); DBServiceEmp.GetEmployeeIDCompleted += new EventHandler<GetEmployeeIDCompletedEventArgs>(DBServiceEmp_GetEmployeeIDCompleted); DBServiceEmp.GetEmployeeIDAsync(EmpID); } } this is my method void DBServiceEmp_GetEmployeeIDCompleted(object sender, GetEmployeeIDCompletedEventArgs e) { // List<Employee> Employes = new List<Employee>(); List<Employee> rows = new List<Employee>(); for (int i = 0; i < e.Result.Count; i++) { rows.Add(e.Result[i]); } dgrdRowDetail.ItemsSource = rows; // here i am binding the child datagrid with new data source } dgrdRowDetail.ItemsSource = rows// what ever rows i am binding to dgrdRowDetail are not shown in the page if i check the rows i am able to see the value ther. but in the child grid it is not reflecting plz plz help me out i am struck thanks in advance prince

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  • Multi-Threading Question Concerning WPF

    - by Andrew
    Hello, I'm a newbie to threading, and I don't really know how to code a particular task. I would like to handle a mouse click event on a window that will kick off a while loop in a seperate thread. This thread, which is distinct from the UI thread, should call a function in the while loop which updates a label on the window being serviced by the UI thread. The while loop should stop running when the left mouse button is no longer being pressed. All the loop does is increment a counter, and then repeatedly call the function which displays the updated value in the window. The code for the window and all of the threading is given below (I keep getting some error about STA threading, but don't know where to put the attribute). Also, I'm hoping to use this solution, if it ever works, in another project that makes asynchronous calls elsewhere to a service via wcf, so I was hoping not to make any application-wide special configurations, since I'm really new to multi-threading and am quite worried about breaking other code in a larger program... Here's what I have: <Window x:Class="WpfApplication2.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:WpfApplication2" Name="MyMainWindow" Title="MainWindow" Width="200" Height="150" PreviewMouseLeftButtonDown="MyMainWindow_PreviewMouseLeftButtonDown"> <Label Height="28" Name="CounterLbl" /> </Window> And here's the code-behind: using System.Windows; using System.Windows.Input; using System.Threading; namespace WpfApplication2 { /// <summary> /// Interaction logic for MainWindow.xaml /// </summary> public partial class MainWindow : Window { private int counter = 0; public MainWindow() { InitializeComponent(); } private delegate void EmptyDelegate(); private void MyMainWindow_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e) { Thread counterThread = new Thread(new ThreadStart(MyThread)); counterThread.Start(); } private void MyThread() { while (Mouse.LeftButton == MouseButtonState.Pressed) { counter++; Dispatcher.Invoke(new EmptyDelegate(UpdateLabelContents), null); } } private void UpdateLabelContents() { CounterLbl.Content = counter.ToString(); } } } Anyways, multi-threading is really new to me, and I don't have any experience implementing it, so any thoughts or suggestions are welcome! Thanks, Andrew

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  • Implementing events to communicate between two processes - C

    - by Jamie Keeling
    Hello all! I have an application consisting of two windows, one communicates to the other and sends it a struct constaining two integers (In this case two rolls of a dice). I will be using events for the following circumstances: Process a sends data to process b, process b displays data Process a closes, in turn closing process b Process b closes a, in turn closing process a I have noticed that if the second process is constantly waiting for the first process to send data then the program will be just sat waiting, which is where the idea of implementing threads on each process occurred and I have started to implement this already. The problem i'm having is that I don't exactly have a lot of experience with threads and events so I'm not sure of the best way to actually implement what I want to do. Following is a small snippet of what I have so far in the producer application; Create thread: case IDM_FILE_ROLLDICE: { hDiceRoll = CreateThread( NULL, // lpThreadAttributes (default) 0, // dwStackSize (default) ThreadFunc(hMainWindow), // lpStartAddress NULL, // lpParameter 0, // dwCreationFlags &hDiceID // lpThreadId (returned by function) ); } break; The data being sent to the other process: DWORD WINAPI ThreadFunc(LPVOID passedHandle) { HANDLE hMainHandle = *((HANDLE*)passedHandle); WCHAR buffer[256]; LPCTSTR pBuf; LPVOID lpMsgBuf; LPVOID lpDisplayBuf; struct diceData storage; HANDLE hMapFile; DWORD dw; //Roll dice and store results in variable storage = RollDice(); hMapFile = CreateFileMapping( (HANDLE)0xFFFFFFFF, // use paging file NULL, // default security PAGE_READWRITE, // read/write access 0, // maximum object size (high-order DWORD) BUF_SIZE, // maximum object size (low-order DWORD) szName); // name of mapping object if (hMapFile == NULL) { dw = GetLastError(); MessageBox(hMainHandle,L"Could not create file mapping object",L"Error",MB_OK); return 1; } pBuf = (LPTSTR) MapViewOfFile(hMapFile, // handle to map object FILE_MAP_ALL_ACCESS, // read/write permission 0, 0, BUF_SIZE); if (pBuf == NULL) { MessageBox(hMainHandle,L"Could not map view of file",L"Error",MB_OK); CloseHandle(hMapFile); return 1; } CopyMemory((PVOID)pBuf, &storage, (_tcslen(szMsg) * sizeof(TCHAR))); //_getch(); MessageBox(hMainHandle,L"Completed!",L"Success",MB_OK); UnmapViewOfFile(pBuf); return 0; } I'm trying to find out how I would integrate an event with the threaded code to signify to the other process that something has happened, I've seen an MSDN article on using events but it's just confused me if anything, I'm coming up on empty whilst searching on the internet too. Thanks for any help Edit: I can only use the Create/Set/Open methods for events, sorry for not mentioning it earlier.

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  • JQuery - Pass variables to PHP script via AJAX call and then display file

    - by hfidgen
    Hiya, I'm trying to generate Outlook event files for my events, doing so on the fly as and when someone requests it by pressing a link on the page. Here's what i've got so far, but I can't find out how to get the browser to download the content which is returned. I know how I could do this if I sent everything via _GET, but I'd prefer to do it via _POST, hence I'm going down this route.. Any thoughts? Thanks! HTML / Javascript <script> $(function() { $(".button").click(function() { // validate and process form // first hide any error messages var start = $("input#start").val(); var end = $("input#end").val(); var dataString = 'start='+ start + '&end=' + end; $.ajax({ type: "POST", url: "/calendar.php", data: dataString, success: function(data) { //Need to return the file contents somehow! } }); return false; }); }); </script> <form name="calendar" method="post" action=""> <input type="hidden" name="start" id="start" value="<?php echo $start; ?>" /> <input type="hidden" name="end" id="end" value="<?php echo $end; ?>" /> <input type="submit" name="submit" class="button" id="submit_btn" value="Outlook" /> </fieldset> </form> PHP File <?php if (isset($_POST['start'])) { $start = $_POST['start']; $end = $_POST['end']; $c = header("Content-Type: text/Calendar"); $c .= header("Content-Disposition: inline; filename=calendar.ics"); $c .= "BEGIN:VCALENDAR\n"; $c .= "VERSION:2.0\n"; $c .= "PRODID:-//xxxyyyy//NONSGML //EN\n"; $c .= "METHOD:REQUEST\n"; // requied by Outlook $c .= "BEGIN:VEVENT\n"; $c .= "UID:". $start . $end ."-" . "-xxxxyyyy.com\n"; // required by Outlook $c .= "DTSTAMP:".date('Ymd').'T'.date('His')."\n"; // required by Outlook $c .= "DTSTART:20080413T000000\n"; $c .= "SUMMARY:" . "\n"; $c .= "DESCRIPTION:" . "\n"; $c .= "END:VEVENT\n"; $c .= "END:VCALENDAR\n"; echo $c; } else { echo "Sorry you can't access this page directly"; } ?>

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  • Hibernate @Transactional not starting transaction

    - by rhinds
    I have a web app using Hibernate, and I am attempting to persist some data, but it is failing to persist within a Transaction despite using the @Transactional annotation. My service class is as follows: @Service("profileService") public class ProfileService { private EntityManager entityManager; @Autowired private AccountService accountService; @Autowired private ProfileDAOImpl profileDao; @PersistenceContext public void setEntityManager(EntityManager em) { this.entityManager = em; } @Transactional public void addConnectionToAccount(SocialConnection sc) { entityManager.persist(sc); } } The addConnectionToAccount() method is being called from another Spring bean in a normal method, and the ProfileService class is currently being injected there: public class HibernateConnectionRepository implements ConnectionRepository { @Inject private ProfileService profileService; @Override @Transactional public void addConnection(SocialConnection sc) { try { profileService.addConnectionToAccount(accountId, sc); } catch (Exception e) { e.printStackTrace(); } } I tried putting the @Transactional annotation on the calling method in the vain hope that it might make a difference but nothing. Previously I have experienced problems like this its been because the object being persisted does not satisfy table restrictions (such as non-nullable columns as null) or because the method is being called from within the same class and the calling method is not Transactional, but neither of those are the case here.. Any ideas? it just fails silently, the logs are as follows: 2012-03-26 22:25:04,702 [http-bio-8085-exec-9] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - trace com.mchange.v2.resourcepool.BasicResourcePool@1bc25c8 [managed: 3, unused: 2, excluded: 0] (e.g. com.mchange.v2.c3p0.impl.NewPooledConnection@e5b006) 2012-03-26 22:25:04,710 [http-bio-8085-exec-9] DEBUG org.hibernate.SQL - select SEQ_COUNT from SEQUENCE where SEQ_NAME = 'PO_SEQ' for update 2012-03-26 22:25:04,711 [http-bio-8085-exec-9] DEBUG org.hibernate.SQL - update SEQUENCE set SEQ_COUNT = ? where SEQ_COUNT = ? and SEQ_NAME = 'PO_SEQ' 2012-03-26 22:25:04,723 [http-bio-8085-exec-9] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - trace com.mchange.v2.resourcepool.BasicResourcePool@1bc25c8 [managed: 3, unused: 2, excluded: 0] (e.g. com.mchange.v2.c3p0.impl.NewPooledConnection@e5b006) 2012-03-26 22:25:04,723 [http-bio-8085-exec-9] DEBUG org.hibernate.event.internal.AbstractSaveEventListener - Generated identifier: 2200, using strategy: org.hibernate.id.MultipleHiLoPerTableGenerator UPDATE Also wanted to mention that the HibernateConnectionRepository bean is not annotated and is actually being configured in an @Configuration class (if this makes any difference? not used @Configuration classes much). The method to create the bean is as follows: @Bean @Scope(value = "request", proxyMode = ScopedProxyMode.INTERFACES) public ConnectionRepository connectionRepository() { Authentication authentication = SecurityContextHolder.getContext().getAuthentication(); if (authentication == null) { throw new IllegalStateException("Unable to get a ConnectionRepository: no user signed in"); } ApplicationUser user = (ApplicationUser) authentication.getPrincipal(); return usersConnectionRepository().createConnectionRepository(String.valueOf(user.getAccountId())); } The bean is scoped to the logged in user, but may also be created multiple times for each user..

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