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  • Asynchronous sockets in C#

    - by IVlad
    I'm confused about the correct way of using asynchronous socket methods in C#. I will refer to these two articles to explain things and ask my questions: MSDN article on asynchronous client sockets and devarticles.com article on socket programming. My question is about the BeginReceive() method. The MSDN article uses these two functions to handle receiving data: private static void Receive(Socket client) { try { // Create the state object. StateObject state = new StateObject(); state.workSocket = client; // Begin receiving the data from the remote device. client.BeginReceive( state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReceiveCallback), state); } catch (Exception e) { Console.WriteLine(e.ToString()); } } private static void ReceiveCallback( IAsyncResult ar ) { try { // Retrieve the state object and the client socket // from the asynchronous state object. StateObject state = (StateObject) ar.AsyncState; Socket client = state.workSocket; // Read data from the remote device. int bytesRead = client.EndReceive(ar); if (bytesRead > 0) { // There might be more data, so store the data received so far. state.sb.Append(Encoding.ASCII.GetString(state.buffer,0,bytesRead)); // Get the rest of the data. client.BeginReceive(state.buffer,0,StateObject.BufferSize,0, new AsyncCallback(ReceiveCallback), state); } else { // All the data has arrived; put it in response. if (state.sb.Length > 1) { response = state.sb.ToString(); } // Signal that all bytes have been received. receiveDone.Set(); } } catch (Exception e) { Console.WriteLine(e.ToString()); } } While the devarticles.com tutorial passes null for the last parameter of the BeginReceive method, and goes on to explain that the last parameter is useful when we're dealing with multiple sockets. Now my questions are: What is the point of passing a state to the BeginReceive method if we're only working with a single socket? Is it to avoid using a class field? It seems like there's little point in doing it, but maybe I'm missing something. How can the state parameter help when dealing with multiple sockets? If I'm calling client.BeginReceive(...), won't all the data be read from the client socket? The devarticles.com tutorial makes it sound like in this call: m_asynResult = m_socClient.BeginReceive (theSocPkt.dataBuffer,0,theSocPkt.dataBuffer.Length, SocketFlags.None,pfnCallBack,theSocPkt); Data will be read from the theSocPkt.thisSocket socket, instead of from the m_socClient socket. In their example the two are one and the same, but what happens if that is not the case? I just don't really see where that last argument is useful or at least how it helps with multiple sockets. If I have multiple sockets, I still need to call BeginReceive on each of them, right?

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  • How to dispose NHibernate ISession in an ASP.NET MVC App

    - by Joe Young
    I have NHibernate hooked up in my asp.net mvc app. Everything works fine, if I DON'T dispose the ISession. I have read however that you should dispose, but when I do, I get random "Session is closed" exceptions. I am injecting the ISession into my other objects with Windsor. Here is my current NHModule: public class NHibernateHttpModule : IHttpModule { public void Init(HttpApplication context) { context.BeginRequest += context_BeginRequest; context.EndRequest += context_EndRequest; } static void context_EndRequest(object sender, EventArgs e) { CurrentSessionContext.Unbind(MvcApplication.SessionFactory); } static void context_BeginRequest(object sender, EventArgs e) { CurrentSessionContext.Bind(MvcApplication.SessionFactory.OpenSession()); } public void Dispose() { // do nothing } } Registering the ISession: container .Register(Component.For<ISession>() .UsingFactoryMethod(() => MvcApplication.SessionFactory.GetCurrentSession()).LifeStyle.Transient); The error happens when I tack the Dispose on the unbind in the module. Since I keep getting the session is closed error I assume this is not the correct way to do this, so what is the correct way? Thanks, Joe

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  • Using HTMLAgility Pack to Extract Links

    - by Soham
    Hi Folks, Consider this simplest piece of code: using System; using System.Collections.Generic; using System.Linq; using System.Text; using HtmlAgilityPack; namespace WebScraper { class Program { static void Main(string[] args) { HtmlDocument doc = new HtmlDocument(); doc.LoadHtml("http://www.google.com"); foreach (HtmlNode link in doc.DocumentNode.SelectNodes("//a[@href]")) { } } } } This effectively doesnt do anything at all, and is copied/inspired from various other StackOverflow questions like this. When compiling this, there is a runtime error which says "Object reference not set to an instance of an object." highlighting the foreach line. I can't understand, why the environment has become irritable to this humble,innocent and useless piece of code. I would also like to know, does HTMLAgilityPack accept HTML classes as nodes?

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  • Powerbuilder Dynamic Array Manipulation

    - by TomatoSandwich
    string array[] long lBound, uBound lBound = LowerBound(array[]) // = 1, empty array value uBound = UpperBound(array[]) // = 0, empty array value array[1] = 'Item 1' array[2] = 'Item 2' array[3] = 'Item 3' lBound = LowerBound(array[]) // = 1 uBound = UpperBound(array[]) // = 3 array[3] = '' //removing item 3 lBound = LowerBound(array[]) // = 1, still uBound = UpperBound(array[]) // = 3, still (but array[3] is nulled? I think the line 'array[3]' is wrong, but I think I've read that this should remove the array cell. What would be the right way to remove an array cell? Does it depend on object type? (String vs Number vs Object) Or Can one manipulate the UpperBound value to make it work? i.e. after removing Item 3, I want the UpperBound, or arraylength, to be 2, since this is logically correct.

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  • Send parameters in order in HTTPService

    - by Suraj Chandran
    I am trying to work with a simple HTTPService. The problem is that my webservice is conscious of the order of arguments it gets. I will tell the problem with an example: var service:HTTPService = new HTTPService(); var params:Object = new Object(); params.rows = 0; params.facet = "true"; service.send(params); Note that in the above code I have mentioned the parameter rows before facet, but the url I recieve is facet=true&rows=0. So I recieve the argument rows before facet and hence my webservice does not work. I figured out that the contents of array is always sent in alphabetical order, which I dont want. Is there any way I can achieve explict ordering of parameters sent? Note that I am not in power of changing the logic of webservice(its basically a RPC service supporting both desktop and web client). Thanks.

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  • WPF Error when implementing Login.xaml

    - by LnDCobra
    I am getting the following exception: "Nullable object must have a value" Everything was working when I was using StartupURI="MainWindow.xaml" but I wanted to implement a login screen so I changed this to Startup="Application_Startup" and then created the following method in App.xaml.cs: private void Application_Startup(object sender, StartupEventArgs e) { UpdateAccounts(); bool result = true; ///* LoginWindow login = new LoginWindow(); result = login.ShowDialog().Value; /* */ if (!result) { return; } MainWindow window = new MainWindow(); bool main = window.ShowDialog().Value; } Does anyone have any idea what is going on? Or any suggestions on what is the best practice for implementing login interface.

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  • Lucene's nested query evaluation regarding negation

    - by ponzao
    Hi, I am adding Apache Lucene support to Querydsl (which offers type-safe queries for Java) and I am having problems understanding how Lucene evaluates queries especially regarding negation in nested queries. For instance the following two queries in my opinion are semantically the same, but only the first one returns results. +year:1990 -title:"Jurassic Park" +year:1990 +(-title:"Jurassic Park") The simplified object tree in the second example is shown below. query : Query clauses : ArrayList [0] : BooleanClause "MUST" occur : BooleanClause.Occur "year:1990" query : TermQuery [1] : BooleanClause "MUST" occur : BooleanClause.Occur query : BooleanQuery clauses : ArrayList [0] : BooleanClause "MUST_NOT" occur : BooleanClause.Occur "title:"Jurassic Park"" query : TermQuery Lucene's own QueryParser seems to evaluate "AND (NOT" into the same kind of object trees. Is this a bug in Lucene or have I misunderstood Lucene's query evaluation? I am happy to give more information if necessary.

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  • Redirect output logs of javax.xml.ws and com.sun.xml.ws

    - by chrisnfoneur
    I am working on a SOAP based web service, with Sun's Metro. I am facing an annoying bug, each time I send a malformed SOAP object to my web service, sun's api spam the System.out with logs like this: javax.xml.ws.WebServiceException: com.sun.istack.XMLStreamException2: org.xml.sax.SAXParseException: cvc-complex-type.4: Attribute 'type' must appear on element 'object'. at com.sun.xml.ws.util.pipe.AbstractSchemaValidationTube.doProcess(AbstractSchemaValidationTube.java:206) at com.sun.xml.ws.util.pipe.AbstractSchemaValidationTube.processRequest(AbstractSchemaValidationTube.java:175) at com.sun.xml.ws.api.pipe.Fiber.__doRun(Fiber.java:595) at com.sun.xml.ws.api.pipe.Fiber._doRun(Fiber.java:554) at com.sun.xml.ws.api.pipe.Fiber.doRun(Fiber.java:539) at com.sun.xml.ws.api.pipe.Fiber.runSync(Fiber.java:436) at com.sun.xml.ws.server.WSEndpointImpl$2.process(WSEndpointImpl.java:243) at com.sun.xml.ws.transport.http.HttpAdapter$HttpToolkit.handle(HttpAdapter.java:444) at com.sun.xml.ws.transport.http.HttpAdapter.handle(HttpAdapter.java:244) at com.sun.xml.ws.transport.http.server.WSHttpHandler.handleExchange(WSHttpHandler.java:106) at com.sun.xml.ws.transport.http.server.WSHttpHandler.handle(WSHttpHandler.java:91) at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:65) at sun.net.httpserver.AuthFilter.doFilter(AuthFilter.java:54) at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:68) at sun.net.httpserver.ServerImpl$Exchange$LinkHandler.handle(ServerImpl.java:555) at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:65) at sun.net.httpserver.ServerImpl$Exchange.run(ServerImpl.java:527) at sun.net.httpserver.ServerImpl$DefaultExecutor.execute(ServerImpl.java:119) at sun.net.httpserver.ServerImpl$Dispatcher.handle(ServerImpl.java:349) at sun.net.httpserver.ServerImpl$Dispatcher.run(ServerImpl.java:321) at java.lang.Thread.run(Thread.java:619) Caused by: com.sun.istack.XMLStreamException2: org.xml.sax.SAXParseException: cvc-complex-type.4: Attribute 'type' must appear on element 'object'. at com.sun.xml.ws.util.xml.StAXSource$1.parse(StAXSource.java:185) at com.sun.xml.ws.util.xml.StAXSource$1.parse(StAXSource.java:170) at org.apache.xerces.jaxp.validation.ValidatorHandlerImpl.validate(Unknown Source) at org.apache.xerces.jaxp.validation.ValidatorImpl.validate(Unknown Source) at javax.xml.validation.Validator.validate(Validator.java:127) at com.sun.xml.ws.util.pipe.AbstractSchemaValidationTube.doProcess(AbstractSchemaValidationTube.java:204) ... 20 more I would like to switch off this log or redirect it to my error/warn/debug.log files used by log4j. I tried to add a rule in my log4j.xml file : <category name="javax.xml.ws"> <priority value="error" /> </category> It didn't worked. So I tried the following trick: java.util.logging.Logger.getLogger("javax.xml.ws.WebServiceException").setLevel( java.util.logging.Level.OFF); it didn't worked neither. Any ideas ? It is not a big issue but it makes my catalina.log getting bigger & bigger and it's not the appropriate place for this kind of log. Chris

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  • Linq query challenge

    - by vdh_ant
    My table structure is as follows: Person 1-M PesonAddress Person 1-M PesonPhone Person 1-M PesonEmail Person 1-M Contract Contract M-M Program Contract M-1 Organization At the end of this query I need a populated object graph where each person has their: PesonAddress's PesonPhone's PesonEmail's PesonPhone's Contract's - and this has its respective Program's Now I had the following query and I thought that it was working great, but it has a couple of problems: from people in ctx.People.Include("PersonAddress") .Include("PersonLandline") .Include("PersonMobile") .Include("PersonEmail") .Include("Contract") .Include("Contract.Program") where people.Contract.Any( contract => (param.OrganizationId == contract.OrganizationId) && contract.Program.Any( contractProgram => (param.ProgramId == contractProgram.ProgramId))) select people; The problem is that it filters the person to the criteria but not the Contracts or the Contract's Programs. It brings back all Contracts that each person has not just the ones that have an OrganizationId of x and the same goes for each of those Contract's Programs respectively. What I want is only the people that have at least one contract with an OrgId of x with and where that contract has a Program with the Id of y... and for the object graph that is returned to have only the contracts that match and programs within that contract that match. I kinda understand why its not working, but I don't know how to change it so it is working... This is my attempt thus far: from people in ctx.People.Include("PersonAddress") .Include("PersonLandline") .Include("PersonMobile") .Include("PersonEmail") .Include("Contract") .Include("Contract.Program") let currentContracts = from contract in people.Contract where (param.OrganizationId == contract.OrganizationId) select contract let currentContractPrograms = from contractProgram in currentContracts let temp = from x in contractProgram.Program where (param.ProgramId == contractProgram.ProgramId) select x where temp.Any() select temp where currentContracts.Any() && currentContractPrograms.Any() select new Person { PersonId = people.PersonId, FirstName = people.FirstName, ..., ...., MiddleName = people.MiddleName, Surname = people.Surname, ..., ...., Gender = people.Gender, DateOfBirth = people.DateOfBirth, ..., ...., Contract = currentContracts, ... }; //This doesn't work But this has several problems (where the Person type is an EF object): I am left to do the mapping by myself, which in this case there is quite a lot to map When ever I try to map a list to a property (i.e. Scholarship = currentScholarships) it says I can't because IEnumerable is trying to be cast to EntityCollection Include doesn't work Hence how do I get this to work. Keeping in mind that I am trying to do this as a compiled query so I think that means anonymous types are out.

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  • Scheme Formatting Help

    - by Logan
    I've been working on a project for school that takes functions from a class file and turns them into object/classes. The assignment is all about object oriented programming in scheme. My problem however is that my code doesn't format right. The output it gives me whenever I give it a file to pass in wraps the methods of the class in a list, making it so that the class never really gets declared. I can't for the life of me figure out how to get the parenthesis wrapping the method list to remove. I would really appreciate any help. Below is the code and the class file. ;;;; PART1 --- A super-easy set of classes. Just models points and lines. Tests all of the ;; basics of class behavior without touching on anything particularly complex. (class pointInstance (parent:) (constructor_args:) (ivars: (myx 1) (myy 2)) (methods: (getx () myx) (gety () myy) (setx (x) (set! myx x)) (show () (begin (display "[") (display myx) (display ",") (display myy) (display "]"))) )) (require (lib "trace.ss")) ;; Continue reading until you hit the end of the file, all the while ;; building a list with the contents (define load-file (lambda (port) (let ((rec (read port))) (if (eof-object? rec) '() (cons rec (load-file port)))))) ;; Open a port based on a file name using open-input-file (define (load fname) (let ((fport (open-input-file fname))) (load-file fport))) ;(define lis (load "C:\\Users\\Logan\\Desktop\\simpletest.txt")) ;(define lis (load "C:\\Users\\Logan\\Desktop\\complextest.txt")) (define lis (load "C:\\Users\\Logan\\Desktop\\pointinstance.txt")) ;(display (cdaddr (cdddar lis))) (define makeMethodList (lambda (listToMake retList) ;(display listToMake) (cond [(null? listToMake) retList ;(display "The list passed in to parse was null") ] [else (makeMethodList (cdr listToMake) (append retList (list (getMethodLine listToMake)))) ] ) )) ;(trace makeMethodList) ;this works provided you just pass in the function line (define getMethodLine (lambda (functionList) `((eq? (car msg) ,(caar functionList)) ,(caddar functionList)))) (define load-classes (lambda paramList (cond [(null? paramList) (display "Your parameters are null, man.")] [(null? (car paramList))(display "Done creating class definitions.")] [(not (null? (car paramList))) (begin (let* ((className (cadaar paramList)) (classInstanceVars (cdaddr (cddaar paramList))) (classMethodList (cdr (cadddr (cddaar paramList)))) (desiredMethodList (makeMethodList classMethodList '())) ) ;(display "Classname: ") ;(display className) ;(newline)(newline) ;(display "Class Instance Vars: ") ;(display classInstanceVars) ;(newline)(newline) ;(display "Class Method List: ") ;(display classMethodList) ;(newline) ;(display "Desired Method List: ") ;(display desiredMethodList)) ;(newline)(newline) ;---------------------------------------------------- ;do not delete the below code!` `(define ,className (let ,classInstanceVars (lambda msg ;return the function list here (cond ,(makeMethodList classMethodList '()))) )) ;--------------------------------------------------- ))] ) )) (load-classes lis) ;(load-classes lis) ;(load-classes-helper lis) ;(load-classes "simpletest.txt") ;(load-classes "complextest.txt") ;method list ;(display (cdr (cadddr (cddaar <class>))))

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  • How to make tooltip move with mouse (winforms)

    - by BlueRaja The Green Unicorn
    I want it to move when the mouse moves, and disappear when the pointer isn't over the label. This doesn't work: private void lblRevisionQuestion_MouseMove(object sender, MouseEventArgs e) { toolTip1.Show("test", this, PointToClient(MousePosition), Int32.MaxValue); } private void lblRevisionQuestion_MouseLeave(object sender, EventArgs e) { toolTip1.Hide(this); } As soon as the tooltip appears, it steals focus away from the form, evoking MouseLeave. Then the tooltip hides, and the pointer is once again over the label, invoking MouseMove. This results in a choppy, flashing tooltip. Is there any way to do this?

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  • Mocking User.Identity in ASP.NET MVC

    - by Trey Carroll
    I need to create Unit Tests for an ASP.NET MVC 2.0 web site. The site uses Windows Authentication. I've been reading up on the necessity to mock the HTTP context for code that deals with the HttpContext. I feel like I'm starting to get a handle on the DI pattern as well. (Give the class an attribute of type IRepository and then pass in a Repository object when you instantiate the controller.) What I don't understand, however, is the proper way to Mock the Windows Principal object available through User.Identity. Is this part of the HttpContext? Does any body have a link to an article that demonstrates this (or a recommendation for a book)? Thanks, Trey Carroll

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  • WPF Prism MVVM, Internationalized Wizard Passing model data between the wizard steps

    - by Nick V
    I've found the following example of a wizard located here: http://www.codeproject.com/Articles/31837/Creating-an-Internationalized-Wizard-in-WPF Now I've spent quite some time looking at the example and i understand pretty much everything. But i can't figure out how he passes an object between the different modelViews. And as you can imagine that step is quite crucial.. In the example he uses an CupOfCoffee Object in the main wizardviewmodel and somehow manages to adjust it throughout the wizard. But i cant see anywhere how he does that. I've already tried to recreate a project like he has but no success. Could anyone tell me how he passes the objects between the different viewModels?

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  • Using memcache to store obj's in google app engine.

    - by fredrik
    Hi, I'm trying to use memcache to cache data retrevied from the datastore. Storing stings works fine. But can't one store an object? I get an error "TypeError: 'str' object is not callable" when trying to store with this: pageData = PageType(page) memcache.add(memcacheid, pageData, 60) I've read in the documentation that it requires "The value type can be any value supported by the Python pickle module for serializing values." But don't really understand what that is. Or how to convert pageData to it. Any ideas? ..fredrik

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  • How do I modify my WCF service to work with ASP.NET pages?

    - by Scott
    I created a WCF service (.NET 3.5) that grabs data from a db and returns a list of objects. It works just fine. I tested it using the WCFTestClient application and got the desired results. Now, I tried to create an ASP.NET web application and consume the service. After enabling <serviceDebug includeExceptionDetailInFaults="true"/> in the config file, the error message is "Object reference not set to an instance of an object." How do I modify the service to work with ASP.NET? Thanks!

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  • How to Edit NSF file using c#?

    - by Preeti
    Hi, I want to programaticaly change some values to NSF item and then want to save it.(i.e to edit NSF File and then save the editions) for example: I want to set Sender name of all mails to "[email protected]".(Using Domino.dll). Solution I tried: (Swaping of To and From values) String Temp_From = ((object[])docInbox.GetItemValue("From"))[0] as String; String Temp_SendTo = ((object[])docInbox.GetItemValue("SendTo"))[0] as String; docInbox.ReplaceItemValue("From", Temp_SendTo); docInbox.ReplaceItemValue("SendTo", Temp_From); docInbox.Save(true, false, false); /* Applied for following fields also: For From: AltFrom,DisplayFrom,DisplayFrom_2,dspFrom,ForwardedFrom,INetFrom,tmpDisplayFrom For To : displaySendTo,EnterSendTo,Envelope_to,tmpDisplaySendTo Also Tried for saving : docInbox.Save(true, true, true); */ In above code after successful editing changes values are not reflected in Nsf File. But when i am reading edited Nsf (copying modified file on different location ) file programatically it is showing changed values.(Why changes are not visible here ?)

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  • Changing data in a django modelform

    - by Matt Hampel
    I get data in from POST and validate it via this standard snippet: entry_formset = EntryFormSet(request.POST, request.FILES, prefix='entries') if entry_formset.is_valid(): .... The EntryFormSet modelform overrides a foreign key field widget to present a text field. That way, the user can enter an existing key (suggested via an Ajax live search), or enter a new key, which will be seamlessly added. I use this try-except block to test if the object exists already, and if it doesn't, I add it. entity_name = request.POST['entries-0-entity'] try: entity = Entity.objects.get(name=entity_name) except Entity.DoesNotExist: entity = Entity(name=entity_name) entity.slug = slugify(entity.name) entity.save() However, I now need to get that entity back into the entry_formset. It thinks that entries-0-entity is a string (that's how it came in); how can I directly access that value of the entry_formset and get it to take the object reference instead?

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  • Using JSON input in Ruby method on Rails

    - by Zachary
    I am using jQuery to make an AJAX call to a ruby method in my controller. The javascript looks something like this: var latLongJSON = { "address": [ {"lat" : 50, "long" : 50} ] }; var returnedAddresses; $.ajax({ type: "GET", data: latLongJSON, url: "map/getaddresses", success: function(data) { returnedAddresses = JSON.parse(data); } }); Then in my 'getaddresses' method, my parameter coming through looks like: Parameters: {"address"=>"[object Object]"} I'm not sure what to do with this. I'm fairly new to Ruby, and I'm not sure if I need to convert this to something else, or what. Ideally I want to be able to pass in multiple sets of lat/long in the 'address' array, then be able to iterate over those in my Ruby code.

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  • confused about python decorators

    - by nbv4
    I have a class that has an output() method which returns a matplotlib Figure instance. I have a decorator I wrote that takes that fig instance and turns it into a Django response object. My decorator looks like this: class plot_svg(object): def __init__(self, view): self.view = view def __call__(self, *args, **kwargs): print args, kwargs fig = self.view(*args, **kwargs) canvas=FigureCanvas(fig) response=HttpResponse(content_type='image/svg+xml') canvas.print_svg(response) return response and this is how it was being used: def as_avg(self): return plot_svg(self.output)() The only reason I has it that way instead of using the "@" syntax is because when I do it with the "@": @plot_svg def as_svg(self): return self.output() I get this error: as_svg() takes exactly 1 argument (0 given) I'm trying to 'fix' this by putting it in the "@" syntax but I can't figure out how to get it working. I'm thinking it has something to do with self not getting passed where it's supposed to...

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  • Can I provide nil for the -dequeueReusableCellWithIdentifier: method?

    - by mystify
    dequeueReusableCellWithIdentifier: Returns a reusable table-view cell object located by its identifier. (UITableViewCell *)dequeueReusableCellWithIdentifier:(NSString *)identifier Parameters identifier A string identifying the cell object to be reused. By default, a reusable cell's identifier is its class name, but you can change it to any arbitrary value. Ok so if by default it's the class name, why should I put much brain force into thinking about an identifier? Could I provide just nil? Would it then use the class name? Or what did they try to say here? Must I make an NSString with the class name by myself and provide it as identifier?

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  • Changing the message (or exception) in WPF ValidatesOnException binding

    - by Emad
    I have a WPF application using MVVM. I am using binding to a POCO object. The Textbox is bound to a property in the object like: <TextBox.Text> <Binding Path="CertainProperty" Mode="TwoWay" > <Binding.ValidationRules> <ExceptionValidationRule/> </Binding.ValidationRules> </Binding> </TextBox.Text> Now this property is a a int property and when the user tried to enter a non-numeric value, they get the "input string was not in a correct format". What I need to do is customize this message to a more user friendly one. How can I do that ?

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  • Invalid receiver type 'NSUInteger'

    - by CJ
    I have a Core Data entity whose header file looks like this: @interface MyEntity : NSManagedObject { } @property (nonatomic, retain) NSNumber * index; @end And it's implementation file looks like this: @implementation MyEntity @dynamic index; @end Now, I have a piece of code that looks like this: NSArray* selectedObects = [myEntityArrayController selectedObjects]; NSUInteger theIndex = [[[selectedObects objectAtIndex:0] index] unsignedIntegerValue]; The 'myEntityArrayController' object is a NSArrayController which manages all entities of MyEntity. This code executes correctly, however XCode always gives the warning "Invalid receiver type 'NSUInteger'" for the last line of code. For some reason, XCode thinks that the index method returns a NSUInteger. I'm not sure why it thinks this, because 'objectAtIndex' returns an object of type 'id'. I've cleaned the project several times, and these warnings have hung around for a while. Any suggestions are appreciated.

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  • JSINQ (Linq for JavaScript library) sub-queries (how-to)

    - by Tom Tresansky
    I'm using this library: jsinq. I want to create a new object using subqueries. For example, in .NET LINQ, I could do something like this: from a in Attendances where a.SomeProperty = SomeValue select new { .Property1 = a.Property1, .Property2 = a.Property2, .Property3 = (from p in People where p.SomeProperty = a.Property3 select p) } such that I get a list of ALL people where Property3 value matches the attendance's Property3 value in EACH object returned in the list. I didn't see any sample of this in the docs or on the playground. Made a couple tries of it and didn't have any luck. Anybody know if this is possible and how to?

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  • Upgrading to IIS7 stopped Firefox from receiving cookies?

    - by Ted Spence
    Our website has been using IIS6 for a long time. We test on IE8, Firefox, and Chrome. All browsers worked fine. We recently did an upgrade to IIS7, and Chrome and IE8 continue to work normally, but Firefox appears to be unable to get the ASP session cookie. As a result, when our code checks the Session[] object, we see nothing, we think the user has logged out, and the site resets your session. Does anyone know why upgrading to IIS7 would cause this behavior in Firefox? We've: 1) Reverted our application pool back to classic mode (no change); 2) Added a dummy value in the Global.asax object (no change); and 3) changed the web.config file from "authentication cookieless=autodetect" to "cookieless=usercookie" and back (no change).

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  • UITableView not getting populated

    - by jayshree430
    Hi. I have a peculiar problem. I created a normal Objective c class called SampleTable. I then extended UITableView instead of NSObject. Then in the initWithFrame constructor i initialized the table. I also made a NSMutableArray object for the datasource. I also conformed UITableViewDelegate and UITableViewDatasource. I have overridden the necessary methods also. Now i made an object of this class in another class, and added the object as a subview. The tableView is getting drawn according to the CGRectMake() coordinates i gave to the initWithFrame constructor. But it is not getting populated with the data. I dnt know what the problem is . Can plz someone help me. SampleTable.h #import @interface SampleTable : UITableView { NSMutableArray *ItemArray; } @property (nonatomic,retain) NSMutableArray *ItemArray; -(NSMutableArray *) displayItemArray; @end SampleTable.m #import "SampleTable.h" @implementation SampleTable @synthesize ItemArray; -(id)initWithFrame:(CGRect)frm { [super initWithFrame:frm]; self.delegate=self; self.dataSource=self; [self reloadData]; return self; } -(NSMutableArray *) displayItemArray { if(ItemArray==nil) { ItemArray=[[NSMutableArray alloc] initWithObjects:@"1",@"2",@"3",@"4",@"5",nil]; } return ItemArray; } (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return 1; } (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return [ItemArray count]; } (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell= [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell==nil) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier]; [cell autorelease]; } NSString *temp=[self.ItemArray objectAtIndex:indexPath.row]; cell.textLabel.text = temp; return cell; } (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { NSLog(@"didselect"); } -(void) dealloc { [ItemArray release]; [super dealloc]; } @end

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