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  • Silverlight : How to pass data from the reqest to the respose using Webclient Asychronous mode ?

    - by user318332
    This is probably a basic question .. void method1() { String VIP = "test"; WebClient proxy = new WebClient(); proxy.OpenReadCompleted += new OpenReadCompletedEventHandler(proxy_OpenReadCompleted); String urlStr = "someurl/lookup?q=" + keyEntityName + "&fme=1&edo=1&edi=1"; } void proxy_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e) { } I need to access VIP in the proxy_OpenReadCompleted method. Pl. help

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  • How do I debug a difficult-to-reproduce crash with no useful call stack?

    - by David M
    I am encountering an odd crash in our software and I'm having a lot of trouble debugging it, and so I am seeking SO's advice on how to tackle it. The crash is an access violation reading a NULL pointer: First chance exception at $00CF0041. Exception class $C0000005 with message 'access violation at 0x00cf0041: read of address 0x00000000'. It only happens 'sometimes' - I haven't managed to figure out any rhyme or reason, yet, for when - and only in the main thread. When it occurs, the call stack contains one incorrect entry: For the main thread, which this is, it should show a large stack full of other items. At this point, all other threads are inactive (mostly sitting in WaitForSingleObject or a similar function.) I have only seen this crash occur in the main thread. It always has the same call stack of one entry, in the same method at the same address. This method may or may not be related - we do use the VCL in our application. My bet, though, is that something (possibly quite a while ago) is corrupting the stack, and the address where it's crashing is effectively random. Note it has been the same address across several builds, though - it's probably not truly random. Here is what I've tried: Trying to reproduce it reliably at a certain point. I have found nothing that reproduces it every time, and a couple of things that occasionally do, or do not, for no apparent reason. These are not 'narrow' enough actions to narrow it down to a particular section of code. It may be timing related, but at the point the IDE breaks in, other threads are usually doing nothing. I can't rule out a threading problem, but think it's unlikely. Building with extra debugging statements (extra debug info, extra asserts, etc.) After doing so, the crash never occurs. Building with Codeguard enabled. After doing so, the crash never occurs and Codeguard shows no errors. My questions: 1. How do I find what code caused the crash? How do I do the equivalent of walking back up the stack? 2. What general advice do you have for how to trace the cause of this crash? I am using Embarcadero RAD Studio 2010 (the project mostly contains C++ Builder code and small amounts of Delphi.)

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  • CQRS - Should a Command try to create a "complex" master-detail entity?

    - by Simon Crabtree
    I've been reading Greg Young and Udi Dahan's thoughts on Command Query Responsibilty Separation and a lot of what I read strikes a chord with me. My domain (we track vehicles which are doing deliveries) has the concept of a Route which contains one or more Stops. I need my customers to be able to set these up in our system by calling a webservice, and then be able to retrieve information about a Route and how the vehicle is progressing. In the past I would have "cut-down" DTO classes which closely resemble my domain classes, and the customer would create a RouteDto with an array of StopDto(s), and call our CreateRoute webmethod, passing in the RouteDto. When they query our system by calling the GetRouteDetails method, I would return exactly the same objects to them. One of the appealing aspects of CQRS is that the RouteDto might have all manner of properties that the customer wants to query, but have no business setting when they create a Route. So I create a separate CreateRouteRequest class which is passed in when calling the CreateRoute "command", and a Route DTO class which gets returned as a query result. class Route{ string Reference; List<Stop> Stops; } But I need my customer to provide me with Route AND Stop details when they create a route. As I see it I could either... Give my CreateRouteRequest class a Stops(s) property which is an array of "something" representing the data they need to provide about each stop - but what do I call this class? It's not a Stop as that's what I'm calling the list of DTO inside my Route DTO, but I don't like "CreateStopRequest". I also wonder if I'm stuck in a CRUD mindset here thinking in terms of master-detail information and asking the customer to think like that too. class CreateRouteRequest{ string Reference; ... List<CreateStopRequest> Stops; } or They call CreateRoute, and then make a number of calls to an AddStopToRoute method. This feels a bit more "behavioural" but I'm going to lose the ability to treat creating a route including its stops as a single atomic command. If they create a Route and then try to add a Stop which fails due to some validation problem they're going to have a partially correct Route. The fact that I can't come up with a good name for the list of "StopCreationData" objects I'd be working with in option 1, makes me wonder if there's something I'm missing.

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  • Cocoa Touch - setting text of header of UITableView

    - by Mark
    Hey all, I'm trying to set the title of the header of my entire UITableView, but am having no success. For example, on this webpage: http://www.iphonesdkarticles.com/2009/01/uitableview-sectioned-table-view.html I am trying to replicate creating the "Countries" header programmatically. I have a UITableView that works and displays data. When I insert the following line: self.navigationItem.title = @"Countries"; In my viewDidLoad method, nothing happens. Thoughts?

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  • How to handle search term concatenations in SOLR

    - by Joost Moesker
    We are currently replacing our product search from mysql to a SOLR backend. Our customer often search for terms like 'startrek online', 'starwars', 'redsteel' or even 'grandtheftauto'. Is there a method in SOLR to either expand or spellcheck these searches into syllables eg.'star trek online', 'star wars', 'red steel', 'grand theft auto'?

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  • Deleteing an image in run time

    - by Nadav Stern
    hey, i am trying to delete an image with the method: (the file path is correct by 100%) if(File.Exists(filePath)) File.Delete(filePath); and i am getting the following exception : An unhandled exception of type 'System.IO.IOException' occurred in mscorlib.dll Additional information: The process cannot access the file 'C:\visual_programming\yad2\yad2\bin\Debug\images\1.jpg' because it is being used by another process. thanks in advance for your help

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  • C# On Quit WebPage Delete Files and Folders on Server with no user action

    - by user325558
    Hi, I have some problems to delete temporary folder and files on my server when users not finish some action in webpages and quit to other webpages. Initialy at Page Load folders are created to allow the user to load files.I have tried implementing destruction during Idisposable without success. Could someone point the best method to delete folders and files when user quit the page with no action or cancel button. Thanks.

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  • jquery effects after load

    - by Tony
    My slideDown effects didn't showup after invoking load method , my code is : $("#outerDiv").load("vacation.do #innerDiv",{},function () {$("#outerDiv").slideDown("slow");}); What's the problem ?

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  • Subclassing NSObject, can it cause problems?

    - by Sheehan Alam
    I have a very basic data class that is subclassed from NSObject. I declare a few strings, make sure they have properties (nonatomic, copy), and synthesize them. The only method I implemented was dealloc() which releases my strings. Can any memory problems arise from just this? Are there any other methods I need to implement?

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  • ListView, CheckBoxes and the ID's

    - by anselmophil
    So, i'm having a problem (newbie one) with a CheckBox Listener AND a ListView. I need to request the '...long id) that passes through the Overriden method onListItemClick and put it into a OnCheckedChangeListener. How should i do that? If you guys need the code i can post it! Thanks in advance!!

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  • Why we use "this" in Extension Methods ?

    - by M.H
    Hi, I want to ask why we use "this" keyword before the parameter in an extension method (C# Language)........... like this function : public static int ToInt(this string number) { return Int32.Parse(number); } I know that we have to use it but I don't know why.

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  • NSOperation inside NSOperationQueue not being executed

    - by Martin Garcia
    I really need help here. I'm desperate at this point. I have NSOperation that when added to the NSOperationQueue is not being triggered. I added some logging to see the NSOperation status and this is the result: Queue operations count = 1 Queue isSuspended = 0 Operation isCancelled? = 0 Operation isConcurrent? = 0 Operation isFinished? = 0 Operation isExecuted? = 0 Operation isReady? = 1 Operation dependencies? = 0 The code is very simple. Nothing special. LoadingConflictEvents_iPad *loadingEvents = [[LoadingConflictEvents_iPad alloc] initWithNibName:@"LoadingConflictEvents_iPad" bundle:[NSBundle mainBundle]]; loadingEvents.modalPresentationStyle = UIModalPresentationFormSheet; loadingEvents.conflictOpDelegate = self; [self presentModalViewController:loadingEvents animated:NO]; [loadingEvents release]; ConflictEventOperation *operation = [[ConflictEventOperation alloc] initWithParameters:wiLr.formNumber pWI_ID:wiLr.wi_id]; [queue addOperation:operation]; NSLog(@"Queue operations count = %d",[queue operationCount]); NSLog(@"Queue isSuspended = %d",[queue isSuspended]); NSLog(@"Operation isCancelled? = %d",[operation isCancelled]); NSLog(@"Operation isConcurrent? = %d",[operation isConcurrent]); NSLog(@"Operation isFinished? = %d",[operation isFinished]); NSLog(@"Operation isExecuted? = %d",[operation isExecuting]); NSLog(@"Operation isReady? = %d",[operation isReady]); NSLog(@"Operation dependencies? = %d",[[operation dependencies] count]); [operation release]; Now my operation do many things on the main method, but the problem is never being called. The main is never executed. The most weird thing (believe me, I'm not crazy .. yet). If I put a break point in any NSLog line or in the creation of the operation the main method will be called and everything will work perfectly. This have been working fine for a long time. I have been making some changes recently and apparently something screw things up. One of those changes was to upgrade the device to iOS 5.1 SDK (iPad). To add something, I have the iPhone (iOS 5.1) version of this application that use the same NSOperation object. The difference is in the UI only, and everything works fine. Any help will be really appreciated. Regards,

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  • off a sound effect with NSUserDefaults

    - by Momeks
    i try to off a sound effect on my app play method is [myMusic play]; ' BOOL soundIsOff = [defaults boolForKey:@"sound_off"]; //the problem is here //xcode compiler doesn't copile this code [myMusic play] = soundIsOff; sound code : ///sound effect ', NSString * musicSonati = [[NSBundle mainBundle] pathForResource:@"sound" ofType:@"wav"]; myMusic = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:musicSonati] error:NULL]; myMusic.delegate = self; myMusic.numberOfLoops = 0;

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  • How to configure log4j with a properties file

    - by Dan
    How do I get log4j to pick up a properties file. I'm writing a Java desktop app which I want to use log4j. In my main method if have this: PropertyConfigurator.configure("log4j.properties"); The log4j.properties file sits in the same directory when I open the Jar. Yet I get this error: log4j:ERROR Could not read configuration file [log4j.properties]. java.io.FileNotFoundException: log4j.properties (The system cannot find the file specified) What am I doing wrong?

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  • Accessing a web service and a HTTP interface using certificate authentication

    - by ADC
    It is the first time I have to use certificate authentication. A commercial partner expose two services, a XML Web Service and a HTTP service. I have to access both of them with .NET clients. What I have tried 0. Setting up the environment I have installed the SSLCACertificates (on root and two intermediate) and the client certificate in my local machine (win 7 professional) using certmgr.exe. 1. For the web service I have the client certificate (der). The service will be consumed via a .NET proxy. Here's the code: OrderWSService proxy = new OrderWSService(); string CertFile = "ClientCert_DER.cer"; proxy.ClientCertificates.Add(new System.Security.Cryptography.X509Certificates.X509Certificate(CertFile)); orderTrackingTO ot = new orderTrackingTO() { order_id = "80", tracking_id = "82", status = stateOrderType.IN_PREPARATION }; resultResponseTO res = proxy.insertOrderTracking(ot); Exception reported at last statement: The request failed with an empty response. 2. For the HTTP interface it is a HTTPS interface I have to call through POST method. The HTTPS request will be send from a .NET client using HTTPWebRequest. Here's the code: string PostData = "MyPostData"; //setting the request HttpWebRequest req; req = (HttpWebRequest)HttpWebRequest.Create(url); req.UserAgent = "MyUserAgent"; req.Method = "POST"; req.ContentType = "application/x-www-form-urlencoded"; req.ClientCertificates.Add(new System.Security.Cryptography.X509Certificates.X509Certificate(CertFile, "MyPassword")); //setting the request content byte[] byteArray = Encoding.UTF8.GetBytes(PostData); Stream dataStream = req.GetRequestStream(); dataStream.Write(byteArray, 0, byteArray.Length); dataStream.Close(); //obtaining the response WebResponse res = req.GetResponse(); r = new StreamReader(res.GetResponseStream()); Exception reported at last statement: The request was aborted: Could not create SSL/TLS secure channel. 3. Last try: using the browser In Chrome, after installing the certificates, if I try to access both urls I get a 107 error: Error 107 (net::ERR_SSL_PROTOCOL_ERROR) I am stuck.

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  • How to REALLY focus a link using jQuery / javascript

    - by Bobby Jack
    Calling the jQuery focus() method on a link appears to only partially focus the link. Whilst the link has focus to the extent that pressing ENTER follows the link, it doesn't take on the default outline styling (or adopt any styling set via the :focus pseudo-class), nor is the tab-order correctly 'entered'. Any ideas on how to resolve this? (results observed in Firefox 3.6.2)

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  • Rspec - Rails - How to follow a redirect

    - by Jonas Söderström
    Does anyone know how to make rspec follow a redirect (in a controller spec)? (e.g test/unit has follow_redirect!) I have tried "follow_redirect!" and "follow_redirect" but only get undefined method `follow_redirect!' for #<Spec::Rails::Example::ControllerExampleGroup::Subclass_1:0xb6df5294>

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  • How would I set up this enum to return the image I want?

    - by Justen
    I'm trying to set up this enum so that it has the ability to return the correct image, though I'm struggling with a way to incorporate the context since it is in a separate class. public enum CubeType { GREEN { public Drawable getImage() { return Context.getResources().getDrawable( R.drawable.cube_green ); } }; abstract public Drawable getImage(); } The error I'm getting is: Cannot make a static reference to the non-static method getResources() from the type Context

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