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• how to bind data binding source to group radio buttons

  Hi I am working on windows c# application (visual studio 20008).In my form I have 5 Radio buttons ,grouped by group box. I have to bind this radio button to data binding source. this.rdoptPlus.DataBindings.Add(new Binding("Checked", MemberDefinitionsBindingSource, "UnaryOperator", true)); this.rdoptMinus.DataBindings.Add(new Binding("Checked", MemberDefinitionsBindingSource, "UnaryOperator", true)); i am unable to bind single datacolum to 5 radio buttons,please help me  read moreBy masuri suhasiniDid you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Understanding Data Binding for Windows Phone 7

  - by nikhil

  I want to develop a simple app for the Windows Phone 7 platform. It's basically a vocabulary based game that involves the user moving word tiles from one area to another to score points. I want to know what is the best way of tying the UI to the game's backend? I saw the Windows Phone 7 jumpstart videos, there they touch up on Data Binding but don't really go into any depth. I'm a newbie and don't have any experience with designing the architecture for a phone app, It'd be great if someone could explain what steps I should be taking or guide me to a resource from where I could learn more.

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• Drive Innovation from Data with Oracle Business Analytics

  - by Mike.Hallett(at)Oracle-BI&EPM

  Oracle is doing a big marketing push on the transformational value of Business Analytics to our customers, and we hope you as partners can get excited, involved and more business from this campaign.  Work with your local in-country BI business development manager and your partner channel manager: if you want to contribute and are struggling to make contact, then let me know ([email protected]) and I will facilitate introductions. Oracle Day Business Analytics Track Invite your customers to register for their local Oracle Day to get the latest news from OpenWorld and learn about Oracle's Big Data strategy and solution. There is a dedicated Business Analytics track. Business Analytics Facebook Hub Encourage your customers to "Like" the Business Analytics Facebook Page @ www.facebook.com/OracleBusinessAnalytics so they can receive useful and interesting information on their Facebook wall.

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• Common mistakes made by new programmers without CS backgrounds [on hold]

  - by mblinn

  I've noticed that there seems to be a class of mistakes that new programmers without CS backgrounds tend to make, that programmers with CS backgrounds tend not to. I'm not talking about not understanding source control, or how to design large programs, or a whole host of other things that both freshly minted CS graduates and non-CS graduates tend to not understand, I'm talking about basic mistakes that having a CS background will prevent a programmer from making. One obvious and well trod example is that folks who don't have a basic understanding of formal languages will often try to parse arbitrary HTML or XML using regular expressions, and possibly summon Cthulu in the process. Another fairly common one that I've seen is using common data structures in suboptimal ways like using a vector and a search function as if it were a hash map. What sorts of other things along these lines would you look out for when on-boarding a batch of newly minted, non-CS programmers.

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• tic tac toe game ai as3

  - by David Jones

  I'm looking into creating a simple tic tac toe/noughts and crosses game in actionscript3 and am trying to understand the ideas behind the ai used in a game like this. I've seen some simplistic examples online but from what I've read a game tree or something like minimax is the best way to go about this. Can anyone help explain or reference any good examples of this? I've seen that there is a library called as3ds - data structures for game developers which has a number of classes that might help tie this together? Any info/examples or help is much appreciated

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• Optimizing data downloaded via 'link' media queries and asynchronous loading

  - by adam-asdf

  I have a website that tries to make sensible use of media queries and avoid 'expensive' CSS for users of mobile devices. My eventual goal is to make it 'mobile-first' but for now, since it is based on Twitter Bootstrap it isn't. I included some background images (Base64 encoded) and styles that would only apply to "full-size" browsers in a separate stylesheet loaded asynchronously via modernizr.load. In Firefox (but not webkit browsers) it makes it so that if you navigate away from the homepage and then return, the content (specifically, all those extras) 'blinks' when it finishes loading...or maybe I should say reloading. If, instead of using modernizr.load, I include that stylesheet via a link... in the head with a media query attribute will it prevent the data from being downloaded by non-matching browsers (mobile, based on screensize) that it is inapplicable to?

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• mismatch of version of libkdcraw20 and libkdcraw-data

  - by naveen jankar

  I'm using Ubuntu 12.04 LTS. When I'm installlin digiKam, I'm getting a mismatch in the versions of libkdcraw20 and libkdcraw-data wanted by it and that available in the repositories. It wants version 4.8.5-0ubuntu0.2 (or in other words that is the latest version according to synaptic) but the available one is 4.8.5-0ubuntu0.3 in both cases. Is there a work-around? Or how do I request the Ubuntu managers to rectify this? addenda On Synaptic i selected digikam to be installed. it downloaded all the dependencies but the 2 in question were not found - the message it gave "W: Failed to fetch security.ubuntu.com/ubuntu/pool/main/libk/libkdcraw/… 404 Not Found [IP: 91.189.91.13 80]". I google-searched the 2 files in the repositories to find that the version available there is ubuntu0.3 instead of ubuntu0.2.

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• How to modify VBO data

  - by Romeo

  I am learning LWJGL so i can start working on my game. In order to learn LWJGL I got the idea to implement the map builder so I can get comfortable with graphics programming. Now, for the map creation tool I need to draw new elements or draw the old one's with different coordinates. Let me explain this: My game will be a 2D scroller. The map will be consisting of multiple rectangles ( 2 strip triangles). When I click my left-mouse button i want to start the rectangle and when I release it I want to stop the rectangle bottom-right at that position. As I want to use VBOs I want to know how to modify data inside the VBO based on user input. Should i have a copy of a vertex array and then add the whole array to the VBO at each user input? How is usually implemented the VBO update?

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• Custom extensible file format for 2d tiled maps

  - by Christian Ivicevic

  I have implemented much of my game logic right now, but still create my maps with nasty for-loops on-the-fly to be able to work with something. Now I wanted to move on and to do some research on how to (un)serialize this data. (I do not search for a map editor - I am speaking of the map file itself) For now I am looking for suggestions and resources, how to implement a custom file format for my maps which should provide the following functionality (based on MoSCoW method): Must have Extensibility and backward compatibility Handling of different layers Metadata on whether a tile is solid or can be passed through Special serialization of entities/triggers with associated properties/metadata Could have Some kind of inclusion of the tileset to prevent having scattered files/tilesets I am developing with C++ (using SDL) and targetting only Windows. Any useful help, tips, suggestions, ... would be appreciated!

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• SQLAuthority News List of Master Data Services White Paper

  Since my TechEd India 2010 presentation I am very excited with SQL Server 2010 MDS. I just come across very interesting white paper on Microsoft site related to this subject. Here is the list of the same and location where you can download them. They are all written by Top Experts at Microsoft. Master Data [...]...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• New AutoVue for Agile Data Sheet & Solution Brief

  - by Pam Petropoulos

  AutoVue for Agile visualization solutions deliver best-in-class document and CAD (MCAD and ECAD) visualization and collaboration capabilities directly within Oracle Agile PLM. With AutoVue for Agile solutions, companies can enable visual decision-making across the product lifecycle and simplify end-to-end design to manufacturing. They can also optimize new product development and introduction, as well as change management processes, and enable more efficient collaboration with global supply chain partners without jeopardizing critical intellectual property. Check out the latest AutoVue for Agile materials which outline the capabilities of the AutoVue 2D Professional for Agile and AutoVue Electro-Mechanical Professional for Agile solutions and their corresponding benefits. Click here for the data sheet. Click here for the solution brief.

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• Data Binding to Attached Properties

  - by Chris Gardner

  Originally posted on: http://geekswithblogs.net/freestylecoding/archive/2013/06/14/data-binding-to-attached-properties.aspx When I was working on my C#/XAML game framework, I discovered I wanted to try to data bind my sprites to background objects. That way, I could update my objects and the draw functionality would take care of the work for me. After a little experimenting and web searching, it appeared this concept was an impossible dream. Of course, when has that ever stopped me? In my typical way, I started to massively dive down the rabbit hole. I created a sprite on a canvas, and I bound it to a background object. <Canvas Name="GameField" Background="Black"> <Image Name="PlayerStrite" Source="Assets/Ship.png" Width="50" Height="50" Canvas.Left="{Binding X}" Canvas.Top="{Binding Y}"/> </Canvas> Now, we wire the UI item to the background item. public MainPage() { this.InitializeComponent(); this.Loaded += StartGame; }   void StartGame( object sender, RoutedEventArgs e ) { BindingPlayer _Player = new BindingPlayer(); _Player.X = Window.Current.Bounds.Height - PlayerSprite.Height; _Player.X = ( Window.Current.Bounds.Width - PlayerSprite.Width ) / 2.0; } Of course, now we need to actually have our background object. public class BindingPlayer : INotifyPropertyChanged { private double m_X; public double X { get { return m_X; } set { m_X = value; NotifyPropertyChanged(); } }   private double m_Y; public double Y { get { return m_Y; } set { m_Y = value; NotifyPropertyChanged(); } }   public event PropertyChangedEventHandler PropertyChanged; protected void NotifyPropertyChanged( [CallerMemberName] string p_PropertyName = null ) { if( PropertyChanged != null ) PropertyChanged( this, new PropertyChangedEventArgs( p_PropertyName ) ); } } I fired this baby up, and my sprite was correctly positioned on the screen. Maybe the sky wasn't falling after all. Wouldn't it be great if that was the case? I created some code to allow me to move the sprite, but nothing happened. This seems odd. So, I start debugging the application and stepping through code. Everything appears to be working. Time to dig a little deeper. After much profanity was spewed, I stumbled upon a breakthrough. The code only looked like it was working. What was really happening is that there was an exception being thrown in the background thread that I never saw. Apparently, the key call was the one to PropertyChanged. If PropertyChanged is not called on the UI thread, the UI thread ignores the call. Actually, it throws an exception and the background thread silently crashes. Of course, you'll never see this unless you're looking REALLY carefully. This seemed to be a simple problem. I just need to marshal this to the UI thread. Unfortunately, this object has no knowledge of this mythical UI Thread in which we speak. So, I had to pull the UI Thread out of thin air. Let's change our PropertyChanged call to look this. public event PropertyChangedEventHandler PropertyChanged; protected void NotifyPropertyChanged( [CallerMemberName] string p_PropertyName = null ) { if( PropertyChanged != null ) Windows.ApplicationModel.Core.CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync( Windows.UI.Core.CoreDispatcherPriority.Normal, new Windows.UI.Core.DispatchedHandler( () => { PropertyChanged( this, new PropertyChangedEventArgs( p_PropertyName ) ); } ) ); } Now, we raised our notification on the UI thread. Everything is fine, people are happy, and the world moves on. You may have noticed that I didn't await my call to the dispatcher. This was intentional. If I am trying to update a slew of sprites, I don't want thread being hung while I wait my turn. Thus, I send the message and move on. It is worth nothing that this is NOT the most efficient way to do this for game programming. We'll get to that in another blog post. However, it is perfectly acceptable for a business app that is running a background task that would like to notify the UI thread of progress on a periodic basis. It is worth noting that this code was written for a Windows Store App. You can do the same thing with WP8 and WPF. The call to the marshaler changes, but it is the same idea.

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• Cannot read from 2nd SATA data drive connected via SATA docking station

  - by Robbo

  Installed 10.10 this week on dual boot system. Everything else works fine but cannot read from 2nd SATA drive with all my data. Same drive works normally when booted to Windows XP. Interesting part is that I can see the drive in Ubuntu Disk Manager, can read all its attributes, can test it, shows up in Disk Manager, Storage Device Manager and Mount Manager, and can mount it, even change attributes; it appears healthy but does not show up in "Computer" or anywhere else that it can be accessed. The drive is connected via an external e-SATA docking station which is connected to a SATA port on the motherboard.

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• Mounting ntfs windows drive and retrieving its data

  - by Sarmad

  Hej, A friend gave me his laptop which had problems with booting (windows). He claims his data on the drive to be retrieved and saved. I have Linux Ubuntu Server to mount its hard drive and check the contents. Now when I have mounted it I see only boot.sdi, sources, System Volume Information I have no idea why is it so? How can I access and retrieve the contents? results of sudo fdisk -l are as follows: Enhet Start Början Slut Block Id System /dev/sdb1 2048 3074047 1536000 27 Hidden NTFS WinRE /dev/sdb2 * 3074048 246945791 121935872 7 HPFS/NTFS/exFAT /dev/sdb3 246945792 416354295 84704252 7 HPFS/NTFS/exFAT /dev/sdb4 416354304 488394751 36020224 f W95 Utökad (LBA) /dev/sdb5 416356352 488394751 36019200 7 HPFS/NTFS/exFAT Please help me in this regard.

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• in memory datastore in haskell

  - by Simon

  I want to implement an in memory datastore for a web service in Haskell. I want to run transactions in the stm monad. When I google hash table steam Haskell I only get this: Data. BTree. HashTable. STM. The module name and complexities suggest that this is implemented as a tree. I would think that an array would be more efficient for mutable hash tables. Is there a reason to avoid using an array for an STM hashtable? Do I gain anything with this stem hash table or should I just use a steam ref to an IntMap?

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• Tic-Tac-Toe game AI

  - by David Jones

  I'm looking into creating a simple tic tac toe/noughts and crosses game in Actionscript3 and am trying to understand the ideas behind the AI used in a game like this. I've seen some simplistic examples online but from what I've read a game tree or something like minimax is the best way to go about this. Can anyone help explain or reference any good examples of this? I've seen that there is a library called as3ds - data structures for game developers which has a number of classes that might help tie this together? Any info/examples or help is much appreciated.

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• Can't mount data DVD using 12.04

  - by dash2

  I cannot mount a data DVD using Ubuntu 12.04. I can read the DVD using a different OS, so the DVD is not the problem. I can read other CDs using Ubuntu. The error I get is: $ sudo mount /dev/dvd /cdrom mount: no medium found on /dev/sr0 The relevant output from lshw is: *-cdrom description: DVD reader product: DVD/CDRW UJDA775 vendor: MATSHITA physical id: 0.0.0 bus info: scsi@4:0.0.0 logical name: /dev/cdrom logical name: /dev/cdrw logical name: /dev/dvd logical name: /dev/sr0 version: CB03 capabilities: removable audio cd-r cd-rw dvd configuration: ansiversion=5 status=nodisc I have installed ubuntu-restricted-extras and run /usr/share/doc/libdvdread4/install-css.sh.

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• Slow transfer to external USB3 hard drive

  - by JMP

  Trying to backup data from hard drive before reloading windows following some issue with its load. Having trouble with the file transfer to a USB3/2 external hard drive NTFS. Getting transfer speed of about 116.7kB/sec. In other words its taking about 5 hours to transfer 1.4GB. I've got about 80GB to go. So the transfer is going to take 11days. Seems a little on the slow side. Am I missing something? Is there a way to make this faster. No issue with the external drive transferring this amount in windows. But don't have that option at the moment.

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• Clear Linux file system after shutdown / start

  - by user35443

  I have very specific task. I need to clear the desktop, downloads, documents and so on after every shutdown or finish. For example, if anyone downloads something using Google Chrome, he will work with it and then he'll shutdown the computer for next use. And when second user sits for working on the computer, he'll find a clear file system without the data downloaded by the first user. On Windows, I used to work with Returnil Virtual System, but it doesn't have support for Linux. Can anybody tell me if is it possible and, if so, how? I was also thinking of using Wine for this program, but don't think it will be the best idea.

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• Fast Track Data Warehouse 3.0 Reference Guide

  - by jchang

  Microsoft just release Fast Track Data Warehouse 3.0 Reference Guide version. The new changes are increased memory recommendation and the disks per RAID group change from 2-disk RAID 1 to 4-Disk RAID 10. Memory The earlier FTDW reference architecture cited 4GB memory per core. There was no rational behind this, but it was felt some rule was better than no rule. The new FTDW RG correctly cites the rational that more memory helps keep hash join intermediate results and sort operations in memory. 4-Disk...(read more)

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• Evolution and thunderbird sharing same mail data?

  - by balki

  Hi, I have been using Evolution for a quite long and it has downloaded around 1.6GBs of mails from gmail. I want to try thunderbird but I dont want to re download everything again. Is that possible to have both clients sharing same data? I'll make sure I don't use both at the same time if that matters. I'll move to thunderbird fully if I'm happy with it. Problems I face with evolution is that I have to have the GUI running always if I want to get instant alerts and send mail immediately. Also it loads the messages slow and even after I move to the next mail, it slowly downloads all the linked images before moving on.

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• Google analytics/adwords account and leaking of private data

  - by Satellite

  I am frequently asked to log into clients google analytics and adwords accounts. If I forget to log out before visiting other google properties (google search, youtube etc), this leaves tracks of my views/searches etc, exposing my activities to the client. Summary: Client gives me access to their Google Analytics / AdWords account I log into clients Analytics account and do some stuff Then in another tab I perform some related google searches to solve some related issues Issues solved, I then close the Analytics tab I then visit google.com, perform some unrelated searches I then visit YouTube, view some unrelated videos All Web and YouTube searches are recorded in clients google account, thus leaking potentially sensitive data Even assuming that I remember to log out correctly at step 4 (as I do 95% of the time), anything I do at step 3 is exposed to the client. I would be surprised if this is not a very common issue. I'm looking for a technical solution to ensure that this can never happen. Any ideas?

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• Increase the /home partition without losing the data

  - by sagarchalise

  I have a 320 GB harddrive with three partitions / , /home and swap. What I want to do is change the size of swap which now is 8 GB to 5 GB and append that 3 GB to my /home partition. I have searched through the web for this but don't seem to find a proper way to increase my home partition. Can anyone help ? By the way, I know how to decrease size of swap I just need the proper way to append that unallocated 3 GB of space to my /home partition without loosing the data. Thank You

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• Crawling for geotagged data

  - by abe3

  I have no experience with web crawlers -- but I know that Apache maintains an open source web crawler called "Lucene." How would I go about writing such a crawler to search the web for geo tagged data close to a particular location? What would a general road map look like? How do I pick which slice of the web to crawl? Do I use regular expressions to find things that look like longitudes and latitudes? What does a general sketch of that solution look like?

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• What are some good, simple examples for queues?

  - by Michael Ekstrand

  I'm teaching CS2 (Java and data structures), and am having some difficulty coming up with good examples to use when teaching queues. The two major applications I use them for are multithreaded message passing (but MT programming is out of scope for the course), and BFS-style algorithms (and I won't be covering graphs until later in the term). I also want to avoid contrived examples. Most things that I think of, if I were actually going to solve them in a single-threaded fashion I would just use a list rather than a queue. I tend to only use queues when processing and discovery are interleaved (e.g. search), or in other special cases like length-limited buffers (e.g. maintaining last N items). To the extent practical, I am trying to teach my students good ways to actually do things in real programs, not just toys to show off a feature. Any suggestions of good, simple algorithms or applications of queues that I can use as examples but that require a minimum of other prior knowledge?

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