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• DataSet.GetXml not returning null results

  - by pistacchio

  Hi, whenever I convert a DatSet into an XML with DataSet.GetXml, any null value is ignored, so, where i expect this: <value1>a</value1> <value2></value2> <value3>c</value3> I get this instead: <value1>a</value1> <value3>c</value3> Any quick and dirty way to handle this? Thanks EDIT: I think a solution would be using WriteXml. Could anyone provide me with a sample of using it WITHOUT writing to a file but getting a string just like GetXml does? Thanks

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• Can I draw Qt objects directly to Win32 DC (Device Context)?

  - by Kevin

  I can draw Qt objects to an QImage and then draw the image to HDC or CDC. This may hurt our application's performance. It would be great if I can draw Qt objects directly to Win32 HDC or MFC CDC. I expect that there is a class, say QWin32Image for clear, then I can use it in this way: QWin32Image image(hdc, 100, 100, Format_ARGB32_Premultiplied); QPainter painter(&image); painter.drawText(....); Is it possible for my thought? Or is there a better way to do that?

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• Trouble parsing NMEA data from Serial Port.

  - by rross

  I'm retrieving NMEA sentences from a serial GPS. Then string are coming across like I would expect. The problem is that when parsing a sentence like this: $GPRMC,040302.663,A,3939.7,N,10506.6,W,0.27,358.86,200804,,*1A I use a simple bit of code to make sure I have the right sentect: string[] Words = sBuffer.Split(','); foreach (string item in Words) { if (item == "$GPRMC") { return "Correct Sentence"; } else { return "Incorrect Sentence } } I added the return in that location for the example. I have printed the split results to a text box and have seen that $GPRMC is indeed coming across in the item variable at some point. If the string is coming across why won't the if statement catch? Is is the $? How can I trouble shoot this?

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• How does the timeout work in Restlet's client class?

  - by Greg Noe

  Here's some code: Client client = new Client(Protocol.HTTP); client.setConnectTimeout(1); //milliseconds Response response = client.post(url, paramRepresentation); System.out.println("timed out"); What I would expect to happen is that it prints "timed out" before the resource has time to process. Instead, nothing happens with the timeout and it doesn't print "timed out" until after the resource returns. Even if I put a Thread.sleep(5000) at the resource that's handling the request, the entire sleep is performed, like the timeout did nothing. Anyone have experience with this? I'm using Restlet 1.1.1. Thanks.

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• Terminal services and memory limits

  - by Mark Wassell

  Is there a way in Terminal Services to set limits on memory related parameters for a process. For example working set size and, possibly, if it makes sense, total virtual memory allocation for the session? To turn the question around, we have an application which cannot allocate as much virtual memory running on a terminal server as it can when running on a desktop PC (both I would expect to have a limit of 2GB for user mode address space) and I was wondering if there is another limit for processes or users on a terminal server. Perhaps even 2GB per user rather than per process.

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• zf2 \Zend\Db\Sql\Sql using predicate in where condition

  - by RomanKonz

  i really don't get the point how to use predicates in zend framework 2. this is what i got: $sql->select() ->columns(array('GroupedColum' ,'minValue' => new Expression('min(ValueColumn)'))) ->from('ValueTable') ->group('GroupedColum') ->order('minValue') ->order('GroupedColum') ->limit(10); this is working fine now i want to apply somethin like that: $predicate = new Zend\Db\Sql\Predicate\Predicate(); $sql->where($predicate->greaterThan('filterColumn','20); this is what i tried, it throws no error, but it is not working :-( This is what i expect as SQL: select GroupedColum , min(ValueColumn) as minValue from ValueTable where filterColumn > 20 group by GroupedColum order by minValue GroupedColum limit 10;

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• IIS, Impersonation and COM Interop Premission Denied

  - by user315690

  Hello we are in the throws of integrating a Document Management System with Dynamic CRM 4, have done similar things previously but in this instance we are having to reference a COM dll. We've configured the asp.net page (we are bringing the info in via a i-Frame in CRM), setting Impersonation = True in the Webconfig and ensured that Windows authentication is the only method available within IIS. All works as we would expect when logged into the server itself and the page happily does off finds all the relevant documents for the CRM account and presents them to a user in a nice Infragistics CRM styled grid. However trying this from a client workstation we get the following: System.Runtime.InteropServices.COMException (0xC0042335): Permission denied. Impersonation appears to be passing over the correct details but nothing we've tried thus far has been able to make this work outside of logging into the server. Any thoughts as to what we are missing?

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• PhysX for massive performance via GPU ?

  - by devdude

  I recently compared some of the physics engine out there for simulation and game development. Some are free, some are opensource, some are commercial (1 is even very commercial $$$$). Havok, Ode, Newton (aka oxNewton), Bullet, PhysX and "raw" build-in physics in some 3D engines. At some stage I came to conclusion or question: Why should I use anything but NVidia PhysX if I can make use of its amazing performance (if I need it) due to GPU processing ? With future NVidia cards I can expect further improvement independent of the regular CPU generation steps. The SDK is free and it is available for Linux as well. Of course it is a bit of vendor lock-in and it is not opensource. Whats your view or experience ? If you would start right now with development, would you agree with the above ? cheers

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• How to determine whether a dependency object implements a given dependency property (C# / WPF)

  - by Tim Coulter

  I am working with the classes in the System.Windows.Documents namespace, trying to write some generic code that will conditionally set the value of certain dependency properties, depending on whether these properties exist on a given class. For example, the following method assigns an arbitrary value to the Padding property of the passed FrameworkContentElement: void SetElementPadding(FrameworkContentElement element) { element.SetValue(Block.PaddingProperty, new Thickness(155d)); } However, not all concrete implementations of FrameworkContentElement have a Padding property (Paragraph does but Span does not) so I would expect the property assignment to succeed for types that implement this property and to be silently ignored for types that do not. But it seems that the above property assignment succeeds for instances of all derivatives of FrameworkContentElement, regardless of whether they implement the Padding property. I make this assumption because I have always been able to read back the assigned value. I assume there is some flaw in the way I am assigning property values. What should I do to ensure that a given dependency property assignment is ignored by classes that do not implement that property? Many thanks for your advice. Tim

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• JSP tag lifecycle

  - by mkoryak

  i just introduced a bug into my code because i seem to have misunderstood the jsp tag lifecycle. The tag worked like this before the bug: i pass the tag some collection as an attribute, and it displays it as a table. The collection was passed into the JSP from the controller. after the bug: a removed the attribute which set the collection. instead, in the tag i check if the collection is null, and then grab it by name from the request (using a naming convention). the thing that i didnt expect: after the collection was initially set in the tag, it would never become null on subsequent executions! it was still defined as an non-requred attribute in the TLD. I expected the tag to not hold on to previous values between executions.

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• Visual Studio 2012 not building dependent projects

  - by user1438940

  I just upgraded a VS2010 project to VS2012 and am now having a problem where dependent projects are not building on demand. For instance, say I have the following projects in my solution: Library A ConsoleApp 1 Where ConsoleApp 1 references Library A. If I change the signature of a method in a class in Library A and run ConsoleApp 1, there will be a compiler error due to ConsoleApp 1 not seeing my changes because running ConsoleApp 1 did NOT cause Library A to build. If I manually build Library A, then manually build ConsoleApp 1, it works fine. However, I would expect that running ConsoleApp 1 should cause any dependent projects to be rebuilt before launching. Could I have something configured incorrectly? Or is this a bug in VS2012?

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• handleOpenURL not called using a custom url schema in iPhone OS

  - by favo

  Hi, I have successfuly added my own url schemes to my App. The App correctly launches using the schemes. Now I want to handle the incoming data but the delegate is not called. It is an universal app and I have added the following function to both AppDelegates: - (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url { if (!url) { return NO; } NSString *URLString = [url absoluteString]; UIAlertView *alert = [[UIAlertView alloc] initWithTitle:NSLocalizedString(@"test message", nil) message:URLString delegate:self cancelButtonTitle:nil otherButtonTitles:@"OK", nil]; [alert show]; [alert release]; return YES; } I am testing with a schema like: myapp://appalarm.com …and would expect to be appalarm.com in the URLString What is wrong with it? Thanks for your responses!

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• Wordpress Not Publishing Posts To Custom Template

  - by thatryan

  I am building a theme that has a lot of custom templates, like every page. Ridiculous, but for some reason the template I made for the "postings" page is not getting the posts? I have set the post page in reading preferences, and I have set the page to use my template, but it still publishes posts to a default template. Of all the customization I built into this I did not expect the blog part to give me trouble! lol Anyone run into this kind of thing? Thank you.

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• What makes good software good?

  - by Jonta

  People probably have a lot of different answers here, like good...: scalability, speed, usability, stability, consistency, completeness, absence of bugs, accessibility, documentation, code-quality and so on. There are a lot of philosophies on development of software. Like the UNIX-philosophy. Often vague and not easy to understand. I am looking for statements such as the one cited below. Which you can ask about the software when it's in the design-stage, is ready to be coded, and has been coded and is ready for launch. The software I am talking about, is of course the software made for the end-user. Ken Rockwell wrote: "I expect that it will let me get more accomplished in less time." (Here one could ask "will this let me get more accomplished in less time?")

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• Latent Dirichlet Allocation, pitfalls, tips and programs

  - by Gregg Lind

  I'm experimenting with Latent Dirichlet Allocation for topic disambiguation and assignment, and I'm looking for advice. Which program is the "best", where best is some combination of easiest to use, best prior estimation, fast How do I incorporate my intuitions about topicality. Let's say I think I know that some items in the corpus are really in the same category, like all articles by the same author. Can I add that into the analysis? Any unexpected pitfalls or tips I should know before embarking? I'd prefer is there are R or Python front ends for whatever program, but I expect (and accept) that I'll be dealing with C.

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• Why `#import("dart:unittest")` can't run?

  - by Freewind

  I write some dart test code: #import("dart:unittest"); main() { test('this is a test', () { int x = 2+3; expect(x).equals(5); }); } It doesn't display any error in dart editor, but when I press the "run" button, it reports: Do not know how to load 'dart:unittest''file:///home/freewind/dev/dart/editor /samples/shuzu.org/test/model_test.dart': Error: line 1 pos 1: library handler failed #import("dart:unittest"); ^ I see there is a "dart:unittest" library in my dart-sdk. Why it can't be run?

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• Javascript window.onunload fires off after Page_Load

  - by gnomixa

  I have noticed that window.onunload event fires off AFTER page_load event which makes no sense. This behaviour is creating an issue for me - in my unonload I clear the session, so if the Page_Load first BEFORE onunload, there are errors on the page displayed. I would expect the javascript onunload to fire BEFORE Page_Load....is that the correct assumption? TO CLARIFY: Let's assume I am on page test.aspx, then I click on the link that goes to the same page (say I click on a menu), what I observe is that Page_Load fires first, then onunload fires off. Makes no sense at all.

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• Android AVD error after update to 2.3

  - by outcast

  (ubuntu8.0.4+eclipse3.6.1+ADT8.0.1) I update android from(1.5+1.6+2.1+2.2) to 2.3,but I got 1:/home/workaccount/Android/android-sdk-linux_86//tools/emulator: /lib/tls/i686/cmov/libc.so.6: version GLIBC_2.8' not found (required by /home/workaccount/Android/android-sdk-linux_86//tools/emulator) 2:/home/workaccount/Android/android-sdk-linux_86//tools/emulator: /lib/tls/i686/cmov/libc.so.6: versionGLIBC_2.11' not found (required by /home/workaccount/Android/android-sdk-linux_86//tools/emulator) when I start an AVD. All versions can't work now. I delete everything expect eclipse,download adt, AndroidSDK, platform2.3/2.2 ,still error. Heeeelp!!!

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• input box height issues

  - by Steven Xu

  I'm trying to set an input box with a specific internal height, and I'm running into issues: font-size: 12px; line-height: 12px; height: 12px; display: block; padding: 5px; Is a sample of what I put in inline styles or stylesheets. I would expect the input box value to be visible at full height, but the inner height of the input box ends up being really small, and it always seems to follow the form: actual inner height = css height - 2*border width - 2*padding Funny, because I swear I've done this before without issue. What am I missing?

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• Exceptions silently caught by Windows, how to handle manually?

  - by Mark Ingram

  We're having problems with Windows silently eating exceptions and allowing the application to continue running, when the exception is thrown inside the message pump. For example, we created a test MFC MDI application, and overrode OnDraw: void CTestView::OnDraw(CDC* /*pDC*/) { *(int*)0 = 0; // Crash CTestDoc* pDoc = GetDocument(); ASSERT_VALID(pDoc); if (!pDoc) return; // TODO: add draw code for native data here } You would expect a nasty error message when running the application, but you actually get nothing at all. The program appears to be running perfectly well, but if you check the output window you will see: First-chance exception at 0x13929384 in Test.exe: 0xC0000005: Access violation writing location 0x00000000. First-chance exception at 0x77c6ee42 in Test.exe: 0xC0150010: The activation context being deactivated is not active for the current thread of execution. I know why I'm receiving the application context exception, but why is it being handled silently? It means our applications could be suffering serious problems when in use, but we'll never know about it, because our users will never report any problems.

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• undefined reference linker error

  - by klaus-johan

  Hi, I've stuck myself in a c++ project under linux ,for which I get an undefined reference when I try to create an object of a class that I just wrote.I believe this is an linker error caused by the fact that somewhere , somehow I should tell the linker to take into account the new class. I looked at the project properties and at the run command it executes a script (cmake.sh) . Because the project wasn't created by me , and because I'm a novice in working under linux, I just don't know how to direct the linker to do what I expect him to do !

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• TelerikProfileProvider with custom Membership Provider

  - by Larsenal

  I've setup two membership providers: my custom provider and the Sitefinity provider. My custom membership provider is set as the default. I want to use Sitefinity's Profile provider for both sets of users. However, the profile provider only seems to work for the users that I pull out of the Sitefinity membership provider. After poking around with Reflector a bit, it seems that the Telerik Profile Provider assumes that the username exists in its own DB. User userByName = this.Application.GetUserByName(userName); if (userByName != null) { // magic happens here... } All the magic only happens if it was able to retrieve the user locally. Seems to violate the principles of the providers. Shouldn't I be able to arbitrarily add properties to any user regardless of the membership provider? (I've also posted this on the Sitefinity forum, but haven't got a response yet. SO has spoiled me. I've come to expect an answer in minutes, not days.)

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• Crystal Reports and Report Viewer runtime question

  - by Spooky2010

  Using vs2008 c#. Howdy, Ive got an application where im trying to decide if i should use the Crystal reports or the Report viewer that comes with the visual studio install. My issue is that while it will run fine on my development machine, a lot of the machines the application will be deployed to in remote locations WONT have the runtime for either crystal reports or the report viewer installed. therefore if i build an application using either of these, and prevent user access to the reports only on the machines that do NOT have the runtimes, can the application run ok, or should i expect crazy errors on install and such Any advice appreciated.

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• How to pass -f specdoc option through rake task

  - by dorelal

  I am using rails 2.3.5 .rake spec works fine. This is from spec --help. spec --help -f, --format FORMAT[:WHERE] Specifies what format to use for output. Specify WHERE to tell the formatter where to write the output. All built-in formats expect WHERE to be a file name, and will write to $stdout if it's not specified. The --format option may be specified several times if you want several outputs Builtin formats: silent|l : No output progress|p : Text-based progress bar profile|o : Text-based progress bar with profiling of 10 slowest examples specdoc|s : Code example doc strings nested|n : Code example doc strings with nested groups indented html|h : A nice HTML report failing_examples|e : Write all failing examples - input for --example failing_example_groups|g : Write all failing example groups - input for --example How do I pass -f specdoc through rake task.

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• Deploying WPF application: .NET 3.5 issues

  - by Robbert Dam

  Hi all, Users around my country are currently beta-testing our application. My app uses WPF & Linq, so I need .NET 3.5 installation. On most system, everything works find, including automatic installation on .NET 3.5 on machines that do not have that installed yet. However, on one machine (XP SP2) my application does not run. The user reported no issues during .NET 3.5 installation (except for a process that need to close before the installer could continue - he closed the process and continued). The application crashes on startup. To debug this issue, I did the following: Have him reboot his machine Let him manually re-install the .NET 3.5 framework (no errors reported) Have him run a test WPF app that only displays a button - also crashes Let him send the .NET 3.5 installation logs - these are huge, don't now where to look Does anyone have strategy on how to debug such issues? I expect that this will occur more when the application is released..

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