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• How can I get DVDs playing after a Vista to XP change? [closed]

  - by Liath

  I replaced my vista install on a Dell Inspiron 1525 with XP and have managed to get most things up and running again however I'm having trouble with playing DVDs. When I try and play a DVD I get the following message: Windows Media Player cannot play this DVD because there is a problem with digital copy protection between your DVD drive, decoder, and video card. Try installing an updated driver for your video card. I have ensured that my drive is configured to play Region 2 discs (I'm in the UK), I've installed the most up to date XP codec pack which makes me think it's a driver issue. In device manager I have got my DVD drivers up to date however under "Other Devices" I'm missing several which sound key: Audio Device on High Definition Audio Bus Modem Device on High Definition Audio Bus Video Controller Video Controller (VGA Compatible) However I've installed all the relevant drivers I can find on the Dell website. The drive itself is working - I've run software from the drive. I'm afraid I am far from a sys-admin so I'm struggling on this one. How can I get my DVDs playing again?

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• Matched or unmatched drives for RAID arrays?

  - by Will

  Looking around there is conflciting information on this, with some strongly suggesting one or the other. From my understanding the issue with matched drives is that the wear on both drives is more or less the same, so the potential for the second drive failing with or very soon after the first is pretty high. People also claim matched drives give substianatally higher performance however assuming the unmatched drives are more or less the same (eg 2, 1 TB STATA II 7200rpm drives with 32MB cache), would the minor differences between say a Seagate and a Western Digital one (say one has a 128MB/s read rate, and the other a 150MB/s read rate, as well as I guess various other minor differences) actually cause any notable performance loss, ie potentialy worse than two matched 128MB/s drives, or does RAID not really care and give you essentially an optimal solution (eg upto 278MB/s total read speed for RAID 0 and 1) and similar for other RAID with more "unmatched" drives (5 and 1+0 come to mind as possibilities)? Also I couldnt find much info on how this is different on different RAID setups, eg RAID 0 or RAID 1, software or hardware RAID, etc. I'm assuming such things have an effect, and thats it's not all the same for RAID in general?

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• My system is always disk-bound (the disk light is always on). Why is this?

  - by Scoobie

  I have been given a laptop by the good folks at my company on which to do my work (Java development). I usually use eclipse as my primary development platform. The laptop is a Dell D830 and runs Windows 7 - 32 bit. Although the processor supports a 64 bit instruction-set, licensing limits me to running the 32 bit OS. The HDD is a WD1600BEVT (Western Digital). I have noticed that my disk is always very slow. Windows start up is usually pretty quick, however as soon as I log on, my disk light stays on and usually, the laptop takes about 4 minutes (after logging in -- immediately upon getting the prompt to press Ctrl + Alt + Del to log in) before it's usable. Questions: Is this expected behavior? What can I do to examine the disk and determine the cause of the problem? What can I do to improve my disk's performance? Any optimizations you may be able to suggest? Other Questions: Some have suggested running Process Monitor (from sysinternals), but how would i get the log since start up? Instead of trying to fix this myself, should I simply push this onto the system administrator? Thanks all.

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• Duplicate monitor on highest resolution in Windows 7

  - by AlexanderMP

  I have a monitor with a native resolution of 2560x1440, connected through display port. I also have an AV Receiver connected to the video card via HDMI, to have surround sound in games. All using Radeon HD 5670 (will upgrade soon to HD 7850). The problem is that my computer detects the receiver as a separate monitor, with the highest available resolution of 1920x1080. I have 3 options: Disconnect the second display. But then the sound (digital audio output through video card) also disappears. Duplicate displays. But then my primary monitor resolution is reduced to a maximum of just 1920x1080, that being the maximum of the second monitor. Extend desktop. This is the solution I picked so far, it being the least evil. The problems I face in this situations are 2: I have a blank part of the desktop where I sometimes lose my mouse pointer, so I made the extension small, 640x480, and placed it in a corner; when I turn off the main display, all windows resize to 640x480. In Kubuntu I had the option to duplicate the displays, while keeping the higher resolution. Which was great. I tried overriding using the Win7 netbook hack, but it's not available on non-netbooks. Is there a similar solution for this problem in Windows 7?

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• WPF DataGrid AutoColumn generation via ICustomTypeDescriptor.

  - by panamack

  In a test project I've managed to AutoGenerate WPF DataGrid columns in the following scenario, where the data is stored in a Dictionary and binding is performed via PropertyDescriptors: public class People:List<Person>{ ... } public class Person:Dictionary<string,string>,INotifyPropertyChanged,ICustomTypeDescriptor { } The problem I'm having is in my real life project I'm using MVVM so it's *People*ViewModel which inherits ViewModelBase and hence can't inherit List<Person>. I've tried implementing IList<Person> instead with an internal List<Person> and explicitly setting the DataContext to an IList<Person> reference but that didn't work. I've seen a similar post on binding a win forms DataGridView here, so I'm wondering if the same sort of logic applies in WPF and primarily, what exactly causes the ICustomTypeDescriptor implementation to be picked up when inheriting List<T> that is missing when you simply implement IList<T> instead.

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• Intercept call to property get method in C#

  - by michajas

  Let's assume that we have this class: public class Person { public int Id { get; set; } public string Name { get; set; } } Now, is it possible in C# to intercept call to property get method, run some other method and return result of that method instead of property value? I'd like to be able to do some additional logic behind the scene. The downside is that this class can't be changed (on C# level). Maybe some IL ?

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• Replace CAPICOM with .NET, validate certificate

  - by Zaky

  Hi My component is responsible for downloading files from the server. As part of file validation I have used CAPICOM (SignedCode object) to validate if a certificate contains a specific string and call to Validate method of the SignedCode object. In case the file contains certificate without a requested string in the name, user was prompted if he trust this file. Since CAPICOM going to be deprecated by Microsoft, I need to implement these logic using .NET libraries. How I can get the same functionality using .NET libraries? Is there any example on the web? Thanks Zaky

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• Proper way to add record to many to many relationship in Django

  - by blcArmadillo

  First off, I'm planning on running my project on google app engine so I'm using djangoappengine which as far as I know doesn't support django's ManyToManyField type. Because of this I've setup my models like this: from django.db import models from django.contrib.auth.models import User class Group(models.Model): name = models.CharField(max_length=200) class UserGroup(models.Model): user = models.ForeignKey(User) group = models.ForeignKey(Group) On a page I have a form field where people can enter a group name. I want the results from this form field to create a UserGroup object for the user - group combination and if the group doesn't yet exist create a new Group object. At first I started putting this logic in the UserGroup class with a add_group method but quickly realized that it doesn't really make sense to put this in the UserGroup class. What would the proper way of doing this be? I saw some stuff about model managers. Is this what those are for?

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• 3-tier architecture v. 3-server architecture

  - by kawai

  I'm building a traditional .NET MVC site, so I've got a natural 3-tier software architecture setup (presentation in the form of Views, business layer in the controller, and data layer in the models and data access layer). When I've deployed such sites, it usually goes either on one server (where the web site and db live), or two servers (a web server and a separate db server). How does one go about a 3-server architecture (WEB, APP, and DB)? Would the web server just have the presentation (e.g. the physical View/aspx pages), the app server would hold the config file and bin folder, and the db server would remain as is? My question is essentially, can you simply move the /bin and all app logic onto a separate server from the presentation views? If so, how do you configure the servers to know where to look? If there's a good primer somewhere or someone can give me the lowdown, I'd be forever indebted.

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• Language Agnostic Basic Programming Question

  - by Rachel

  This is very basic question from programming point of view but as I am in learning phase, I thought I would better ask this question rather than having a misunderstanding or narrow knowledge about the topic. So do excuse me if somehow I mess it up. Question: Let's say I have class A,B,C and D now class A has some piece of code which I need to have in class B,C and D so I am extending class A in class B, class C, and class D Now how can I access the function of class A in other classes, do I need to create an object of class A and than access the function of class A or as am extending A in other classes than I can internally call the function using this parameter. If possible I would really appreciate if someone can explain this concept with code sample explaining how the logic flows. Note Example in Java, PHP and .Net would be appreciated.

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• Modularizing web applications

  - by Matt

  Hey all, I was wondering how big companies tend to modularize components on their page. Facebook is a good example: There's a team working on Search that has its own CSS, javascript, html, etc.. There's a team working on the news feed that has its own CSS, javascript, html, etc... ... And the list goes on They cannot all be aware of what everyone is naming their div tags and whatnot, so what's the controller(?) doing to hook all these components in on the final page?? Note: This doesn't just apply to facebook - any company that has separate teams working on separate components has some logic that helps them out. EDIT: Thanks all for the responses, unfortunately I still haven't really found what I'm looking for - when you check out the source code (granted its minified), the divs have UIDs, my guess is that there is a compilation process that runs through and makes each of the components unique, renaming divs and css rules.. any ideas? Thanks all! Matt Mueller

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• Fiscal year handling strategies in database design

  - by Sapphire

  By fiscal year I mean all the data in the database (in all tables) that occurred in the particular year. Lets say that we are building an application that allows user to choose from different years. What way of implementing this would you prefer, and why: Separate fiscal year data based on multiple separate database instances (for example, on every fiscal year start you could create a new instance with no data) Have everything in one database, but with logic that automatically separates records from different years. Personally, I have "seen" both methods, and I would choose the second. The only argument I can think of for the first method is to have less records in case that these are really big databases - but still, you could "archive" old records by joining them in summaries or by some other way. What do you think?

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• any real MVC library in PHP (for GUI apps)

  - by mario

  I'm wondering if there are any abstraction frameworks for one of the PHP gui libraries. We have PHP-GTK, a PHP/Tk interface, and seemingly also PHP-QT. (Not tried any.) I know that writing against the raw Gtk+ interface in Python is just bearable, and it therefore seems not very enticing for PHP. I assume it's the same for Qt, and Tk is pretty low-level too. So I'm looking for something that provides a nicer object structure atop any of the three. Primarily TreeViews are always a chore and php-gtk callbacks are weird in PHP, so I'd like a simplification for that. If it eases adding the GUI/View atop my business logic without much control code, that might already help. And so since GUI apps are an area where MVC or MVP would actually make sense, I'd like to know if any library for that exists. Btw, recently rediscovered PHP interface preprocessor, but that's rather low-level and just provides a simple widget/interface abstraction for Gtk/ncurses/pdf/xhtml output.

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• How to achieve conditional resource import in a Spring XML context?

  - by Boris Terzic

  What I would like to achieve is the ability to "dynamically" (i.e. based on a property defined in a configuration file) enable/disable the importing of a child Spring XML context. I imagine something like: <import condition="some.property.name" resource="some-context.xml"/> Where the property is resolved (to a boolean) and when true the context is imported, otherwise it isn't. Some of my research so far: Writing a custom NamespaceHandler (and related classes) so I can register my own custom element in my own namespace. For example: <myns:import condition="some.property.name" resource="some-context.xml"/> The problem with this approach is that I do not want to replicate the entire resource importing logic from Spring and it isn't obvious to me what I need to delegate to to do this. Overriding DefaultBeanDefinitionDocumentReader to extend the behaviour of the "import" element parsing and interpretation (which happens there in the importBeanDefinitionResource method). However I'm not sure where I can register this extension.

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• iText - Modifying PDFWriter# Verticle Alignment manually

  - by simon622

  Ive hit upon a problem using iText (java), despite hours of looking thru the docs.. Most of the code I use goes via the Document# API which tracks (via the PDFWriter instance) the current Y position. HOWEVER, we need to use the PdfContentByte part of the API to insert some Java2d into the document, but in doing so this appears to bypass the logic which tracks verticle writes. So next time I use the Document API, it overwrites the contents of the manually inserted things. I want to mimick the behaviour of the Document# API by manually moving the cursor on N number of units (N being the height of the element inserted by the PDFContentByte API), such that when I then use the Document object again, bingo, its cursor is in the correct location. I can see that a method to obtain the cursor exists; PdfWriter#getVerticalPosition(boolean); But not one to set it?! Any ideas anyone? Thanks.

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• How to get rid of "Uncaught SoapFault exception: [Client] looks like we got no XML document in..." e

  - by Eedoh

  Hello I'm trying to develop business logic for a dynamic site using nusoap on server side (because I need wsdls, and PHP SOAP extension can't generate wsdls), and PHP SOAP extenstion on client side. However, I can't get even login and getRole functions right. When i try to invoke client, I get following message Uncaught SoapFault exception: [Client] looks like we got no XML document in [some paths]... Wsdl does exist on server side, and client does read it (when I put wrong url for wsdl, I get an error). Can anyone help??

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• RIA Services versus WCF services: what is a difference

  - by Budda

  There are a lot of information how to build Silverlight application using .NET RIA services, but it isn't clear what is unique thing in RIA that is absent in WCF? Here are few topics that are talking around this topic: http://stackoverflow.com/questions/1647225/ria-services-versus-wcf-services http://stackoverflow.com/questions/945123/net-ria-services-wcf-services But they doesn't give an answer to the question. Sorry for the stupid question, but what does "RIA Services" layer bring into your app if you already have "Silverlight <-- WCF Service <-- Business Logic <-- Entity Framework Model <-- Database"? Authentication? Validation? Is it relly asset for you? At the moment the only thing I see: with RIA services usage you don't need to host WCF service manually and don't need to configure any references on the client side (clien side == Silverlight application). Probably I don't know some very useful features of the RIA Services? So could you please point me to the good doc for that? Many thanks.

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• Loading Separate Pages With Animation in JQTouch

  - by Donovan Keith

  I'm trying to convert a database-driven multiple-choice-style study website (written in JSP) into an iPhone app using JQTouch. If I load all of the Q&A's into their own divs in the same file I can easily link and animate between them using links to hashtags, like: a class="button" href="#question22" Unfortunately this isn't practical. The logic of the website as it currently works requires calls to a number of dynamically generated pages; I can't include every question in its own div in the same flat file. How would I go about dynamically (pre)loading the next question (a JSP page like AskQuestion.jsp?questionId=Kzhctand ) then serving that up within the app after the user presses a button? Thanks for any help you might offer. -Donovan

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• SelectionChanged event binding in Silverlight+MVVM-Light

  - by Budda

  The handler of the "SelectionChanged" event of the ComboBox control has the following signature: void SelectionChangedMethod(object sender, SelectionChangedEventArgs e) How to bind to that property under Silverlight 4 and MVVM-Light to the corresponding method of the ViewModel object? As far as I know, I need to do something like this: public void Changed(Object obj, SelectionChangedEventArgs e) { // .... implement logic here } RelayCommand<Object, SelectionChangedEventArgs> _command; public ICommand ObjectSelectionChanged { get { if (_command == null) { _command = new RelayCommand<Object, SelectionChangedEventArgs>(Changed); } return _command; } } The problem is that RelayCommand class in the MVVM-Light framework doesn't support 2 generic parameters... Is there any solution or workaround for this case? How bind control event to the method with 2 parameters?

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• Best UI development framework on windows?

  - by TG

  I have been developing UI in Win32/MFC, but developing cool UI in Win32/MFC is very difficult and time consuming. Please note, I always want my code to be platform independent, So I prefer programming back-end (Business logic) in C++. Which is the best framework for developing cool UI on windows platform? I heard of quite a few, like Qt, Flex, Delphi. What is your thoughts (Pros and Cons) on these UI development frameworks. Which one do you recommend ?

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• Blackberry Development, communicating two Blackberry device in a multiplayer game programatically

  - by Nikesh Yadav

  Hi Forum, We are developing a game application for Blackberry, which will have multi player option to let two or more player compete against each other. We have implemented the logic for that and already two or more player are able to play the game simultaneously on single device. Now we want to upgrade our application so that two or more user can compete each other playing from different device and different locations. Can anyone please help me by providing me the way (or code) to achieve this (communicating two blackberry devices over the air to access single session programmaticaly)? I found the code to connect two device using Bluetooth but as the player may situated in different geographic regions we need to achieve this using over the air connection. Thanks in advance. Thanks, Nikesh

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• iPad UISplitView initial state in portrait: how to display popover controller widget?

  - by Patrick Linskey

  Hi, I'm working on an iPad app that uses a UISplitView. Inspired by http://blog.blackwhale.at/2010/04/your-first-ipad-split-view-application/, I display a button in my detail view when in portrait mode that shows the popover controller. This works great. However, the appropriate UISplitViewControllerDelegate message is only sent when the device rotates. So, when the app first loads (in portrait mode), my navigation button is not visible. Is it possible to somehow convince the UISplitViewController to send that message on load or something, or do I need to re-implement my own popover logic to get things working? Thanks, -Patrick

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• OpenId + Facebook Connect

  - by Claudio Redi

  Hi! I have a request for implementing a login system using local credentials + openId + facebook-connect. So a user could sign up/sign in using any of the 3 possibilities. I think that allowing OpenId AND facebook connect adds some flexibility in one had, but in other hand adds some restrictions since you have to integrate all different logic and make existing differences transparent for users. What do you think? Any good reference for managing federated login using both external mechanisms? Any well known site doing it right now?

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• JSF2 - what scope for f:ajax elements?

  - by Konrad Garus

  I have this form: <h:form> <h:outputText value="Tag:" /> <h:inputText value="#{entryRecorder.tag}"> <f:ajax render="category" /> </h:inputText> <h:outputText value="Category:" /> <h:inputText value="#{entryRecorder.category}" id="category" /> </h:form> What I'm trying to achieve: When you type in the "tag" field, the entryRecorder.tag field is updated with what was typed. By some logic upon this action the bean also updates its category field. This change should be reflected in the form. Questions: What scope shall I use for EntryRecorder? Request may not be satisfactory for multiple AJAX requests, while session will not work with multiple browser windows per one session. How can I register my updateCategory() action in EntryRecorder so that it is triggered when the bean is updated?

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• Grails GORM (Hibernate) query

  - by bsreekanth

  Hello, I'm trying to do the below sql statement in GORM select * from table1 where table1.x not in (select x from table 2 where y='something'); so, I have two tables, and needs to find the entries from table 1 which are not in table 2. In Grails def xx= table2.findByY('something') def c = table1.createCriteria() def result= c.list { not ( in('x', xx) ) } the syntax is wrong, and I'm not sure how to simulate not in sql logic. As a learning point, if someone can also tell me why minus (-) operator in grails/groovy doesn't work with list. I tried getting x and y seperately, and doing x.minus(y), but it doesn't change the list. I saw an explanation at http://stackoverflow.com/questions/1754576/groovy-on-grails-list-not-working , but I would expect the list defined are local. thank you so much.

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