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• Silverlight Cream for December 18, 2010 -- #1012

  - by Dave Campbell

  In this Issue: Mark Monster, Kevin Dockx, Jeremy Likness(-2-,-3-), Timmy Kokke, Den Delimarsky, Mike Snow, Samuel Jack(-2-), and Renuka Prasad(-2-). Above the Fold: Silverlight: "Trigger a Storyboard on ViewModel changes" Mark Monster WP7: "Microsoft Push Notification in Windows Phone 7" Renuka Prasad Shoutouts: SilverlightGal sent me the link to The Silverlight Dossier ... I think it's a pretty good start... additions I'd like to see are ways to submit to the various areas. Michael Crump put up a contest that runs from now to January 1st... Win a set of Infragistics Silverlight Controls with Data Visualization!... pretty cool, Michael! If you visit WynApse.com, you'll see I have a subscription to LearnVisualStudio.net... and now they have posted a batch of WP7 videos... 64 of them to be exact... wow!: New video series From SilverlightCream.com: Trigger a Storyboard on ViewModel changes Mark Monster has a great post up about triggering Storyboard on ViewModel changes using the DataTrigger from Blend... cool stuff, and you can also do GoToStateAction or other actions or build yourowndang Trigger Action... fun awaits! ... sorry it took a while to post, Mark... been a tad overloaded here! Working with the Silverlight Rich Text Box control Kevin Dockx has had a post up for a while at SilverlightShow where he takes a good look at the RichText control and it's various capabilities, including source so you can give it a dance yourself. Lessons Learned in Personal Web Page Part 3: Custom Panel and Listbox Jeremy Likness's part 3 of his Personal Web Page lessons learned is covering the tres-cool 3D Panel he did... and he's got it all explained out... building from scratch via a custom panel and a Listbox control... A Silverlight MVVM Feed Reader from Scratch in 30 Minutes Jeremy Likness has a video tutorial showing building an MVVM/Silverlight feedreader in 30 minutes ... plus a couple mods that he noticed after the fact... beat that HTML5 :) Jounce Part 8: Raising Property Changed In Jeremy Likness's latest post, he has number 8 in his series on his MVVM platform, Jounce. This time he's explaining the property changed notification, has a very cool way of doing it, and some interesting comments from readers. Dependency Injection, MVVM, Ninject and Silverlight Timmy Kokke has a great tutorial up with associated demo project on Dependency Injection in MVVM and Silverlight. Some hidden features in the Windows Phone 7 emulator Den Delimarsky shows how to get some of the hidden features on your WP7 emulator like the Call History, Call Settings, and Details about the numbers. Playing sound effects on Windows Phone 7 Mike Snow's latest tip is playing sound effects on your WP7 ... a little bit of XNA here and there, and badabing, badaboom, you got sound! Day 3 of my “Build a Windows Phone 7 game in 3 days” Challenge Samuel Jack has a couple more posts up about his 'Build a WP7 game in 3 Days' challenge... first up is Day 3 from 8:50 to 22:30 ... wow... long day! ... but he's got something good going now... some good external links also Day 3.5 of my “Build a Windows Phone 7 game in 3 days” Challenge Samuel Jack's 3rd day ended with another half-day added on to put on some finishing touches... again, some good external links... and he finished with this Say hello to Simon Squared, my 3.5 day old WP7 Game Microsoft Push Notification in Windows Phone 7 Renuka Prasad has a bunch of material up that I've not been aware of (how did that happen, people??) ... here's the first of a couple of his posts on Code Project ... a very nice tutorial on the Push Notification process... great diagrams and external links. Windows Phone 7 – Toast Notification Using Windows Azure Cloud Service Renuka Prasad has another WP7 post on CodeProject... this one on Toast Notification... and he's using Azure and WCF all rolled into it as well... great diagrams, descriptions and all the code. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Mock a Linq to Sql EntityRef using Moq?

  - by Jeremy Holt

  My datacontext contains a table named Userlog with a one to many relationship with table UserProfile. In class UserLog public UserProfile UserProfile { get {return this._UserProfile.Entity;} } In class UserProfile public EntitySet<UserLog> UserLogs { get{return this._UserLogs;} } { set {this._UserLogs.Assign(value); } How would I go about mocking (using Moq) UserLog.UserProfile without changing the autogenerated code? What I would like to do is something like: var mockUserLog = new Mock<UserLog>(); mockUserLog.Setup(c=>c.UserProfile.FirstName).Returns("Fred"); etc I can do this if I go into the designer.cs and make FirstName and UserProfile virtual, however I would like to do this in the partial class. Any ideas? Thanks Jeremy

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• Audio recording error kAudioQueueErr_CannotStart on iPhone OS 3.0

  - by Jeremy Borden

  I'm working on a couple different iphone apps that both record and play sounds concurrently. Think multitrack mixing... play one sound a save it then listen to that sound while recording the next sound to another file. My mechanism for this has been to start up two different audio queues, one for recording, and one for playing. This was working A-OK until the release of OS 3.0... Since then, however, the following happens: If I start the recording queue first, it supposedly starts fine, but the call to AudioQueueStart for the playback queue returns kAudioQueueErr_CannotStart. If I start the playback queue first, it also supposedly starts fine, but the call to AudioQueueStart for the record queue returns the same error, kAudioQueueErr_CannotStart. Anyone have any luck debugging this error? Seems like maybe the two queues are stomping on each other's memory or something? The official description is: "The audio queue has encountered a problem and cannot start." Not super helpful... Jeremy

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• Can you define a ResourceDictionary.MergedDictionary together with other (local) resources in <Wind

  - by Jeremy Holt

  I would like to refer to a MergedDictionary together with locally declared resources in my Windows.Resources. However, I'm getting this error: "All objects added to an IDictionary must have a Key attribute or some other type of key associated with them." Is it possible to mix local resources together with imported resources in the same Window.Resources? The XAML is: <Window.Resources> <CollectionViewSource x:Key="cvsData" Source="{Binding Path=Data}"> <CollectionViewSource.GroupDescriptions> <PropertyGroupDescription PropertyName="Country"/> </CollectionViewSource.GroupDescriptions> </CollectionViewSource> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary x:Name="images" Source="pack://application:,,,/CoreWpfControls;component/Images.xaml"/> </ResourceDictionary.MergedDictionaries> </ResourceDictionary> </Window.Resources> Thanks Jeremy

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• Can't reconnect to my RDP session

  - by Jeremy Stein

  I use a VM through RDP. When I'm done for the day, I just disconnect the session and reconnect in the morning. That allows me to pick up what I was doing and not close all the applications. As I'm the only user, this generally works well. Today, I can't reconnect to my session from yesterday. When I RDP, I get a new session. When I run query user, I can see my other session: USERNAME SESSIONNAME ID STATE IDLE TIME LOGON TIME me rdp-tcp#82 1 Active 15:00 4/22/2010 9:00 AM me rdp-tcp#91 2 Active . 4/30/2010 9:00 AM If I try to use Terminal Services Manager to remote control the other session, I get this error: Session (ID 1) remote control failed (Error 7044 - The request to control another session remotely was denied. ) Is there any way to reconnect to this session, or do I need to just kill it?

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• Manually inserting varbinary data into SQL Server

  - by Jeremy Jarrell

  Hi, We have a SQL Server table for user settings. Originally the settings were domain objects which had been serialized as XML into the table but we recently begun serializing them as binary. However, as part of our deployment process we statically pre-populate the table with predefined settings for our users. Originally, this was as simple as copying the XML from a customized database and pasting it into an INSERT statement that was ran after the database was built. However, since we've moved to storing the settings as binary data we can't get this to work. How can we extract binary data from a varbinary column in SQL Server and paste it into a static INSERT script? We only want to use SQL for this, we don't want to use any utilities. Thanks in advance, Jeremy

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• Annoying Search Behavior - Search Companion

  - by David Stein

  I'm running Windows XP Professional, and ever since the last service pack I've had a searching problem. When I want to search a network drive, I get the following message: This folder is not indexed. To search this directory plase use Search Companion or add this directory to your index via options. Basically, I have two questions. Is there some way that I can use the indexed search where appropriate and then have it switch over to the Search Companion automatically? Second, how does a programmer look at this code and think this is a good idea? I realize that this question is rhetorical. However, I must enter my search string into one search, receive the error, and then click "Search Companion" to bring up the new search window. This window doesn't even take the defaults from the previous one so I have to specify the search string and drive again.

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• Backing Up Transaction Logs to Tape?

  - by David Stein

  I'm about to put my database in Full Recovery Model and start taking transaction log backups. I am taking a full nightly backup to another server and later in the evening this file and many others are backed up to tape. My question is this. I will take hourly (or more if necessary) t-log backups and store them on the other server as well. However, if my full backups are passing DBCC and integrity checks, do I need to put my T-Logs on tape? If someone wants point in time recovery to yesterday at 2pm, I would need the previous full backup and the transaction logs. However, other than that case, if I know my full back ups are good, is there value in keeping the previous day's transaction log backups?

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• Spaces in SETX PATH command

  - by Jeremy Stein

  Suppose my PATH is C:\WINDOWS\system32\;C:\Program Files\Important\ SET NEW_PATH=C:\My\Dir\ SETX PATH "%PATH%;%NEW_PATH%" Results in a path of: C:\WINDOWS\system32\;C:\Program Files\Important\;C:\My\Dir" Notice the quotation mark at the end of the path. It's as though the backslash at the end of %NEW_PATH% escaped the final quote mark. I need the quotation marks because I have spaces in my path, but I don't want backslashes to be interpreted as escape characters. What's the right way to include my PATH in the call to SETX?

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• View changelog of all packages to be upgraded before upgrading

  - by Stein G. Strindhaug

  When using synaptic on my Ubuntu desktop computer i can review all changelog of all the packages to be upgraded, and unselect a package for upgrade if I want. On my desktop I usually install everything, but I like to at least review what the changes are so that I can delay the upgrade if I suspect it could cause problems with the development tools I use. On a server (Ubuntu Server) with no x-server how can I do the same thing on the console: list all packages that will be updated (apt-get --dry-run upgrade does this along with a lot of noisy simulated install messages), view the changelog (if any) from last upgrade to the version it will be upgraded to. select which packages I want to ignore, or which I want to upgrade I've searched a lot for this but I haven't found anything, possibly I'm not using the correct terminology; but surely this must be possible. Synaptic must get it's info from some some low-level tool I assume? Complicated shellscripts are welcome too, if this is not already easily done with the existing tools.

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• Can a WCF Service provide publish/subscribe activity to a Linux-based C++ client application?

  - by Jeremy Roddingham

  I have a WCF service written to provide certain functionality to intranet-based clients. This is easy when a client is running Windows. I want to implement the same functionality for my Windows clients that is available to my linux clients. My questions are? How can I communicate to a linux c++ based client (supporting callback operations for a publish subscribe) type situation? I am aware of using SOAP over the HTTPBinding but is that the only way (does not support callbacks I believe)? Would the same apply if I were using TCPBinding on the service-side? Currently, the service is set up using TCP but what are my options for the linux client communcation? I read somewhere that messages can also be sent (via webservices I believe) in XML rather than SOAP? Which would be a better approach or how to determine which is a better approach? I am trying to understand the options I would have for a WCF data service if I wanted to communicate with it from a linux client. I appreciate all your help. Thank You, Jeremy

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• How to access a method on a generic datacontext which is only created at runtime

  - by Jeremy Holt

  I'm creating my generic DataContext using only the connectionString in the ctor. I have no issues in retrieving the table using DataContext.GetTable(). However, I need to also be able to retrieve entities of inline table functions. The dbml designer generates public IQueryable<testFunctionResult> testFunction() { return this.CreateMethodCallQuery<testFunctionResult>(this, ((MethodInfo)(MethodInfo.GetCurrentMethod()))); } The question is how do I get the MethodInfo.GetCurrentMethod() when the DataContext has no method called "testFunction", i.e.typeof(DataContext).GetMethod("testFunction") returns null? What I'm trying to achieve is something like: public class UnitofWork<T> { public UnitofWork(string connectionString) { this.DataContext = new DataContext(connectionString); } public UnitofWork(IQueryable<T> tableEntity) { _tableEntity = tableEntity; } public IQueryable<T> TableEntity { get { if (DataContext == null) return _tableEntity; var metaType = DataContext.Mapping.GetMetaType(typeof (T)); if (metaType.IsEntity) _tableEntity = DataContext.GetTable<T>(); else { var s = typeof(T).Name; string methodName = s.Substring(0, s.IndexOf("Result")) + "()"; // the designer automatically affixes "Result" to the type name // Make a method from methodName // _tableEntity = DataContext.CreateMethodCallQuery(DataContext, method, new object[]{}); } return _tableEntity; } set { _tableEntity = value; } } ) Thanks in advance for any insight Jeremy

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• What *is* an IPM.DistList?

  - by Jeremy

  I'm trying to get the recipient addresses within an IPM.DistList that is stored in a public folder (of type contacts) in Exchange 2003. The typeName of the object (once I get hold of it) is a Message (with a parent object being a Messages collection) and the messageType is "IPM.DistList". I can find all sorts of things about IPM.DistListItems, which you would think an IPM.DistList would contain, but there apparently isn't any documentation on the DistList (that I can find) and DistListItems documentation lists no parent possibilities in MSDN. I'll state it another way in case I've left you confused: We have an Exchange 2003 info store with Public Folders. Within those Public Folders is a [sub]folder (that holds items of type "Contact") that has a bunch of distribution lists (IPM.DistList's) that have contact entries, members of the list essentially. I need to get the addresses of the members of the lists in the Public Folder sub-folder using any VB language, because the company I work for hired me as a VB guy and expects me to write VB solutions, even though I could do it in C++... alas, I digress. VB is the language I'm supposed to figure this out in. (.net, script, vba, vb6, it doesn't matter which one. Yes, I know vb.net is not really related to those that came before, but they don't know that.) Anyone ran into anything like this? Am I just not finding the IPM.DistList documentation but it does actually exist somewhere? This isn't a Message.MAPIOBJECT (iUnknown) problem is it? Thanks.... Jeremy

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• Silverlight Cream for December 11, 2010 -- #1007

  - by Dave Campbell

  In this Issue: Mike Wolf, Colin Eberhardt, Mike Snow(-2-, -3-), David Kelley(-2-, -3-), Jesse Liberty(-2-), Erik Mork, Jeff Blankenburg, Laurent Duveau, and Jeremy Likness(-2-). Above the Fold: Silverlight: "The definitive guide to Notification Window in Silverlight 4" Laurent Duveau WP7: "Making the MS Adcontrol REALLY work on phone 7" David Kelley Silverlight 5: "Silverlight 5: In the Trenches" Mike Wolf From SilverlightCream.com: Silverlight 5: In the Trenches How many people can discuss Silverlight 5 'In the Trenches' ... apparently Mike Wolf can, and that's just what he's done in the post to whet your whistle (do people say that any more?) for when we can all get our hands on the bits. Visiblox, Visifire, DynamicDataDisplay – Charting Performance Comparison Colin Eberhardt responds to reader requests, and revisits his Charting Performance after also some discussion with David Anson about the Silverlight Toolkit. This time including Dynamic Data Display which is quite impressive in the ratings... check out the post and the code. Win7 Mobile Back Arrow Key Interception The simple fact is heavy bloggers rise, like Cream, to the top of my list, and I've been missing some goodness from Mike Snow... he's blogging WP7 stuff now... first up of the 'missed' ones is this one on intercepting the Back Arrow Key. Animating the Color of an Object Switching back to Silverlight in general, Mike Snow's next post is on Animating color of an object, such as text foreground. Tombstoning on the Win7 Mobile Platform And now back to WP7, Mike Snow is discussing Tombstoning... discussing the various aspects of it, and some code to use, if you haven't gotten your head around this one yet. What I tell Designers to give me... Integrating and Digital Zen David Kelley has a post up describing what he needs from designers to get his job done... I heard him discussing this at the Firestarter, and didn't realize he had written it up... these 8 items are things learned by doing, and should be discussed with your designers. Making the MS Adcontrol REALLY work on phone 7 David Kelley also has a post up discussing how to really get the Ad control working on WP7 apps... since I've seen lots of posts about this, having a definitive explanation from someone that's doing it is a good thing. Performance Optimization on Phone 7 In a break from his norm of discussing UX, David Kelley is talking about performance on WP7 devices in this post. Windows Phone From Scratch #10 – Visual State Part 2 When I saw Jesse Liberty's latest post, I realized I had missed his Part 2 of VSM for WP7 ... don't you miss it... this completes the good stuff from number 9 :) Windows Phone From Scratch #11 – Behaviors Jesse Liberty's latest Windows Phone from Scratch is up... and he's talking about Behaviors this time out... more of an overview or introduction to behaviors, but all good Show 112: Scott Guthrie on Silverlight 5 Erik Mork's latest Sparkling Client podcast is up and he was able to get some time with Scott Guthrie at the Firestarter. What I Learned in WP7 – Issue #1 Jeff Blankenburg decided to do another series, only this one isn't promised as every day... it's "What I Learned in WP7" ... and the first is up... good interesting bits found surrounding the WP7 device. The definitive guide to Notification Window in Silverlight 4 Laurent Duveau has a great post up that will have you doing Silverlight 'toast' notifications in no time... good descriptions and source. Lessons Learned in Personal Web Page Part 1: Dynamic XAML Jeremy Likness has rebuilt his personal website in Silverlight and is sharing some of that experience on his blog. This first post discusses the dynamic content. He used Jounce, of course, and included the Silverlight Navigation Framework, and... you can download all the source Lessons Learned in Personal Web Page Part 2: Enter the Matrix Jeremy Likness's second post about building his website is all about the 'Matrix' page ... pretty cool stuff... check it out... I think it looks great Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Silverlight Cream for February 17, 2011 -- #1048

  - by Dave Campbell

  In this Issue: Oren Gal, Andrea Boschin(-2-), Kevin Hoffman, Rudi Grobler(-2-, -3-), Michael Crump, Yochay Kiriaty, Peter Kuhn, Loek van den Ouweland, Jeremy Likness, Jesse Liberty, and WindowsPhoneGeek. Above the Fold: Silverlight: "Multiple page printing in Silverlight4 - Part 2 - preview before printing" Oren Gal WP7: "Windows Phone 7 Tombstoning with MVVM and Sterling" Jeremy Likness XNA: "XNA for Silverlight developers: Part 4 - Animation (frame-based)" Peter Kuhn From SilverlightCream.com: Multiple page printing in Silverlight4 - Part 2 - preview before printing Oren Gal has part 2 of his Printing with Silverlight 4 series up, and this time he's putting up a preview... how cool is that? Inject ApplicationServices with MEF reloaded: supporting recomposition Andrea Boschin revisited his Inject ApplicationServices with MEF post because of feedback, and took it from the realm of an interesting example to a useful solution. Windows Phone 7 - Part #5: Panorama and Pivot controls Andrea Boschin also has part 5 of his WP7 series up at SilverlightShow... want a good demo of both the panorama and the pivot controls... here it is all in one tutorial WP7 for iPhone and Android Developers - Introduction to C# This should be good.. a 12-part series on SilverlightShow by Kevin Hoffman on porting your iPhone/Android app to WP7... this first part an intro to C# Balls of Steel Rudi Grobler discusses the upcoming (?) release of 'Duke Nukem Forever', and has a 'soundboard' for WP7 to celebrate the event... get your Duke Nukem on with these sounds! Moonlight 4 (Preview) is here Rudi Grobler also has a post up about the release of Moonlight by Novel for Silverlight 4!... explanation and links on his post. WP7 Podcasts Rudi Grobler highlights two WP7 Podcasts that are putting out good material... check them out if you haven't already. Having Fun with Coding4Fun’s Windows Phone 7 Controls Michael Crump takes a look at his WP7 app and uses the Coding4Fun project toolset while doing so... getting the tools, setting them up, and consuming them. Windows Phone Silverlight Application Faster Load Time Yochay Kiriaty has a good long discussion up about how to get faster load time out of your WP7 apps... good useful external links throughout. XNA for Silverlight developers: Part 4 - Animation (frame-based) Peter Kuhn's part 4 of his XNA for Silverlight devs is up at Silverlightshow and is a great tutorial on frame-based animation. Windows Phone SoundEffect clipping Loek van den Ouweland has some good information about soudn clips on WP7... the solutions aren't always code solutions.... good to know info. Windows Phone 7 Tombstoning with MVVM and Sterling Jeremy Likness is discussing Tombstoning via MVVM and Sterling... read on how Sterling gives you a leg up on the Tombstone express. Video: Reactive Phone Programming For Windows Phone 7 Fitting in nicely with his podcast on Reactive Programming, Jesse Liberty releases a video on Reactive Programming for WP7. Talking about Data Binding in WP7 | Coding4fun TextBoxBinding helper in depth WindowsPhoneGeek's latest post walks through WP7 databinding in detail with lots of good external links, then follows up with a discussion of the Coding4Fun Binding Helpers Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Silverlight Cream for January 15, 2011 -- #1028

  - by Dave Campbell

  Note to #1024 Swag Winners: I'm sending emails to the vendors Sunday night, thanks for your patience (a few of you have not contacted me yet) In this Issue: Ezequiel Jadib, Daniel Egan(-2-), Page Brooks, Jason Zander, Andrej Tozon, Marlon Grech, Jonathan van de Veen, Walt Ritscher, Jesse Liberty, Jeremy Likness, Sacha Barber, William E. Burrows, and WindowsPhoneGeek. Above the Fold: Silverlight: "Building a Radar Control in Silverlight - Part 1" Page Brooks WP7: "Tutorial: Dynamic Tile Push Notification for Windows Phone 7" Jason Zander Training: "WP7 Unleashed Session I–Hands on Labs" Daniel Egan From SilverlightCream.com: Silverlight Rough Cut Editor SP1 Released Ezequiel Jadib has an announcement about the Rough Cut Editor SP1 release, and he walks you through the content, installation and a bit of the initial use. WP7 Unleashed Session I–Hands on Labs Daniel Egan posted Part 1 of 3 of a new WP7 HOL ... video online and material to download... get 'em while they're hot! WP7 Saving to Media Library Daniel Egan has another post up as well on saving an image to the media library... not the update from Tim Heuer... all good info Building a Radar Control in Silverlight - Part 1 This freakin' cool post from Page Brooks is the first one of a series on building a 'Radar Control' in Silverlight ... seriously, go to the bottom and run the demo... I pretty much guarantee you'll take the next link which is download the code... don't forget to read the article too! Tutorial: Dynamic Tile Push Notification for Windows Phone 7 Jason Zander has a nice-looking tutorial up on dynamic tile notifications... good diagrams and discussion and plenty of code. Reactive.buffering.from event. Andrej Tozon is continuing his Reactive Extensions posts with this one on buffering: BufferWithTime and BufferWIthCount ... good stuff, good write-up, and the start of a WP7 game? MEFedMVVM with PRISM 4 Marlon Grech combines his MEFedMVVM with Prism 4, and says it was easy... check out the post and the code. Adventures while building a Silverlight Enterprise application part #40 Jonathan van de Veen has a discussion up about things you need to pay attention to as your project gets close to first deployment... lots of good information to think about Silverlight or not. Customize Windows 7 Preview pane for XAML files Walt Ritscher has a (very easy) XAML extension for Windows 7 that allows previewing of XAML files in an explorer window... as our UK friends say "Brilliant!" Entity Framework Code-First, oData & Windows Phone Client From the never-ending stream of posts that is Jesse Liberty comes this one on EF Code-First... so Jesse's describing Code-First and OData all wrapped up about a WP7 app Sterling Silverlight and Windows Phone 7 Database Triggers and Auto-Identity Sterling and Database Triggers sitting in a tree... woot for WP7 from Jeremy Likness... provides database solutions including Validation, Data-specific concerns such as 'last modified', and post-save processing ... all good, Jeremy! A Look At Fluent APIs Sacha Barber has a great post up that isn't necessarily Silverlight, but is it? ... we've been hearing a lot about Fluent APIs... read on to see what the buzz is. Windows Phone 7 - Part 3 - Final Application William E. Burrows has Part 3 of his WP7 tutorial series up... this one completing the Golf Handicap app by giving the user the ability to manage scores. User Control vs Custom Control in Silverlight for WP7 WindowsPhoneGeek has a great diagram and description-filled post up on User Controls and Custom Controls in WP7... good external links too. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• VirtualBox host-only networking fails on Ubuntu 11.10 host

  - by Jeremy Kendall

  I've installed Ubuntu 11.10 on a new Lenovo Thinkpad 420s and I'm trying to get some VirtualBox VMs up and running (using Vagrant). Everything works fine until I try to add host-only networking. This is the failure I get in the terminal: I set logging to debug and tried again. Here's a paste of the relevant portion of the log. When I try to add host-only networks with the VirtualBox gui (File-Preferences-Networking-Add host-only networking), I get the following error message: This error is occurring with three different virtual boxes, all Ubuntu 11.10 64bit guests, one of which I've run without issue on a Windows host and an OSX host. Here is the Vagrantfile for the box I've successfully run on Windows and OSX: Vagrant::Config.run do |config| config.vm.box = "ubuntu-11.10" config.vm.box_url = "http://timhuegdon.com/vagrant-boxes/ubuntu-11.10.box" config.vm.network :hostonly, "192.168.33.10" config.vm.customize ["modifyvm", :id, "--memory", "512"] config.vm.customize ["modifyvm", :id, "--natnet1", "10.0.28.0/24"] config.vm.forward_port 80, 4567 end I've tried two other boxes as well, one of which I built last night with veewee, all of which are getting the exact same error. I've used rvm to install ruby 1.9.3-p125 [ x86_64 ], and I've got Vagrant running in its own gemset. I've Googled quite a lot and haven't been able to find any resolution. Suggestions?

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• Print SSRS Report / PDF automatically from SQL Server agent or Windows Service

  - by Jeremy Ramos

  Originally posted on: http://geekswithblogs.net/JeremyRamos/archive/2013/10/22/print-ssrs-report--pdf-from-sql-server-agent-or.aspxI have turned the Web upside-down to find a solution to this considering the least components and least maintenance as possible to achieve automated printing of an SSRS report. This is for the reason that we do not have a full software development team to maintain an app and we have to minimize the support overhead for the support team.Here is my setup:SQL Server 2008 R2 in Windows Server 2008 R2PDF format reports generated by SSRS Reports subscriptions to a Windows File ShareNetwork printerColoured reports with logo and brandingI have found and tested the following solutions to no avail:ProsConsCalling Adobe Acrobat Reader exe: "C:\Program Files (x86)\Adobe\Reader 11.0\Reader\acroRd32.exe" /n /s /o /h /t "C:\temp\print.pdf" \\printserver\printername"Very simple optionAdobe Acrobat reader requires to launch the GUI to send a job to a printer. Hence, this option cannot be used when printing from a service.Calling Adobe Acrobat Reader exe as a process from a .NET console appA bit harder than above, but still a simple solutionSame as cons abovePowershell script(Start-Process -FilePath "C:\temp\print.pdf" -Verb Print)Very simple optionUses default PDF client in quiet mode to Print, but also requires an active session.    Foxit ReaderVery simple optionRequires GUI same as Adobe Acrobat Reader Using the Reporting Services Web service to run and stream the report to an image object and then passed to the printerQuite complexThis is what we're trying to avoid  After pulling my hair out for two days, testing and evaluating the above solutions, I ended up learning more about printers (more than ever in my entire life) and how printer drivers work with PostScripts. I then bumped on to a PostScript interpreter called GhostScript (http://www.ghostscript.com/) and then the solution starts to get clearer and clearer.I managed to achieve a solution (maybe not be the simplest but efficient enough to achieve the least-maintenance-least-components goal) in 3-simple steps:Install GhostScript (http://www.ghostscript.com/download/) - this is an open-source PostScript and PDF interpreter. Printing directly using GhostScript only produces grayscale prints using the laserjet generic driver unless you save as BMP image and then interpret the colours using the imageInstall GSView (http://pages.cs.wisc.edu/~ghost/gsview/)- this is a GhostScript add-on to make it easier to directly print to a Windows printer. GSPrint automates the above  PDF -> BMP -> Printer Driver.Run the GSPrint command from SQL Server agent or Windows Service:"C:\Program Files\Ghostgum\gsview\gsprint.exe" -color -landscape -all -printer "printername" "C:\temp\print.pdf"Command line options are here: http://pages.cs.wisc.edu/~ghost/gsview/gsprint.htmAnother lesson learned is, since you are calling the script from the Service Account, it will not necessarily have the Printer mapped in its Windows profile (if it even has one). The workaround to this is by adding a local printer as you normally would and then map this printer to the network printer. Note that you may need to install the Printer Driver locally in the server.So, that's it! There are many ways to achieve a solution. The key thing is how you provide the smartest solution!

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• "Loading operating system... boot error" when booting from live CD

  - by jeremy

  I'm having a problem installing Ubuntu 12.10 on a new drive. I was running Windows7 on my SSD but when the drive crashed, I decided to use that as an excuse to make the switch to Ubuntu. I've been experimenting with it on my old laptop until I got my SSD replaced under warranty. Now I have my SSD back and want to install Ubuntu on my desktop machine. I used UNetbootin to make a bootable flash drive. I then I went into my BIOS and made sure USB loaded before the hard drive. However, when I try to load it I get an error that says: Loading operating system ... boot error I know the flash drive works because if I reboot my laptop or my other Windows PC with the flash drive and it loads into Ubuntu...just when I try to do it in the PC with no OS currently on the drive.

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• When to implement: Together with or after the source product?

  - by Jeremy Oosthuizen

  Somebody recently relayed a prospect's question to me: How hard would it be to implement OUBI after the source product (CC&B, WAM or NMS) has already been implemented? Fact is that MOST non-OUBI Data Warehouse / Business Intelligence implementations take place after the source application(s) are in place and hopefully stable. If an organization decides that they need better reporting and management information, then the logical path (see The Data Warehouse Institute's Data Warehouse Maturity Model) is to a Data Warehouse -- no matter when their last applications were implemented. If there is a pre-built Data Warehouse for their specific application, or even for the desired business process in their industry, they're in luck. Else they have to design and build from scratch, using a toolset. The implementation of a toolset is unlike the implementation of OUBI which, like OBI Apps, contain pre-built ETL routines and user content. Much has been written before about the advantages of that. So, because OUBI is designed specifically for Oracle Utilities transactional products, we often implement them in parallel -- with OUBI lagging a little behind by necessity, like Reporting. Customers know from the start they're going to need the solution, and therefore purchase the products at the same time. My biggest argument FOR a parallel installation/implementation of OUBI with the source product is two-fold: - There could be things (which is the technical term for data elements) that customers figure out they need when implementing OUBI, which are often easier added to the source product's implementation project, than to add later; - OUBI's ETL often points out errors (severe or not) with converted data, which are easier to fix during the source product's implementation project, or it may even be impossible to fix afterwards. The Conversion routines sometimes miss these errors, because the source system can live with the not-quite-perfect converted data. If the data can't be properly extracted, i.e. the proper Dimensions linked to the Facts, then it can't get into OUBI. That means it can't be analyzed effectively along with the rest of the organization's data. Then there is also the throw-away-work argument, which may be significant. The operational / transactional system cannot go live without reports on Day 1. A lot of those reports would be taken care of by the implementation of OUBI. If OUBI is implemented after go-live, those reports STILL have to be built during the source product's implementation project, but they become throw-away after the OUBI implementation. I have sometimes been told that it is better to implement OUBI after the source product, because it cuts down on scope and risk for the source product's implementation project. All I can say to that, is bah humbug. No, seriously, given the arguments above, planning has to include the OUBI implementation and it has to be managed properly -- just like any other implementation. If so, it should not add any risk and it should be included in the scope from the start. The answer to the prospect's question is therefore that it is not that much more difficult; after all, most DW/BI implemenations are done like that. They just have to consider the points above.

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• On the Fourth Day of the SQL Series...

  - by andyleonard

  Introduction Brent Ozar ( Blog | @BrentO ) has done it again - started something. This time it's The Twelve Days of SQL Series . I was passed the baton from David Stein ( Blog | @made2mentor ) who covered Day 3 with a tribute to his favorite post . And Now, My Selection: I liked Rafael Salas' ( Blog | @RafSalas ) post entitled Denali CTP 1: SSIS Parameters – Bring Them On! Rafael is a friend and fellow SSIS guy. In this post he does a good job pointing out the differences between SSIS Parameters...(read more)

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• Where can I find fellow developers who are looking for help to create a startup?

  - by Jeremy Child

  Where can I find fellow developers who are looking for help to create a startup? Are there any collaboration websites whereby people pitch ideas and a group of people 'join' the project in an effort to create some kind of prototype? Edit: @Vitor Braga - Seriously i'm not looking to make money, just finding developers who are interested in making a trivial little app with someone else. Edit: It may be worthy to explain that I live in a remote area of Australia.

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• Hiring a Junior Developer, What should I ask?

  - by Jeremy

  We are currently hiring a junior developer to help me out, as I have more projects than I can currently manage. I have never hired anyone who wasn't a friend or at least an acquaintance. I have a phone interview with the only applicant that actually stood out to me (on paper), but I have never done this before. Our projects are all high scalability, data intensive web applications that process millions of transactions an hour, across multiple servers and clients. To be language/stack specific, we use ASP.Net MVC2, WebForms and C# 4, MSSQL 2008 R2, all running atop Windows Server 2008 R2 What should I ask him? How should I structure the phone call?

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• Movement and Collision with AABB

  - by Jeremy Giberson

  I'm having a little difficulty figuring out the following scenarios. http://i.stack.imgur.com/8lM6i.png In scenario A, the moving entity has fallen to (and slightly into the floor). The current position represents the projected position that will occur if I apply the acceleration & velocity as usual without worrying about collision. The Next position, represents the corrected projection position after collision check. The resulting end position is the falling entity now rests ON the floor--that is, in a consistent state of collision by sharing it's bottom X axis with the floor's top X axis. My current update loop looks like the following: // figure out forces & accelerations and project an objects next position // check collision occurrence from current position -> projected position // if a collision occurs, adjust projection position Which seems to be working for the scenario of my object falling to the floor. However, the situation becomes sticky when trying to figure out scenario's B & C. In scenario B, I'm attempt to move along the floor on the X axis (player is pressing right direction button) additionally, gravity is pulling the object into the floor. The problem is, when the object attempts to move the collision detection code is going to recognize that the object is already colliding with the floor to begin with, and auto correct any movement back to where it was before. In scenario C, I'm attempting to jump off the floor. Again, because the object is already in a constant collision with the floor, when the collision routine checks to make sure moving from current position to projected position doesn't result in a collision, it will fail because at the beginning of the motion, the object is already colliding. How do you allow movement along the edge of an object? How do you allow movement away from an object you are already colliding with. Extra Info My collision routine is based on AABB sweeping test from an old gamasutra article, http://www.gamasutra.com/view/feature/3383/simple_intersection_tests_for_games.php?page=3 My bounding box implementation is based on top left/bottom right instead of midpoint/extents, so my min/max functions are adjusted. Otherwise, here is my bounding box class with collision routines: public class BoundingBox { public XYZ topLeft; public XYZ bottomRight; public BoundingBox(float x, float y, float z, float w, float h, float d) { topLeft = new XYZ(); bottomRight = new XYZ(); topLeft.x = x; topLeft.y = y; topLeft.z = z; bottomRight.x = x+w; bottomRight.y = y+h; bottomRight.z = z+d; } public BoundingBox(XYZ position, XYZ dimensions, boolean centered) { topLeft = new XYZ(); bottomRight = new XYZ(); topLeft.x = position.x; topLeft.y = position.y; topLeft.z = position.z; bottomRight.x = position.x + (centered ? dimensions.x/2 : dimensions.x); bottomRight.y = position.y + (centered ? dimensions.y/2 : dimensions.y); bottomRight.z = position.z + (centered ? dimensions.z/2 : dimensions.z); } /** * Check if a point lies inside a bounding box * @param box * @param point * @return */ public static boolean isPointInside(BoundingBox box, XYZ point) { if(box.topLeft.x <= point.x && point.x <= box.bottomRight.x && box.topLeft.y <= point.y && point.y <= box.bottomRight.y && box.topLeft.z <= point.z && point.z <= box.bottomRight.z) return true; return false; } /** * Check for overlap between two bounding boxes using separating axis theorem * if two boxes are separated on any axis, they cannot be overlapping * @param a * @param b * @return */ public static boolean isOverlapping(BoundingBox a, BoundingBox b) { XYZ dxyz = new XYZ(b.topLeft.x - a.topLeft.x, b.topLeft.y - a.topLeft.y, b.topLeft.z - a.topLeft.z); // if b - a is positive, a is first on the axis and we should use its extent // if b -a is negative, b is first on the axis and we should use its extent // check for x axis separation if ((dxyz.x >= 0 && a.bottomRight.x-a.topLeft.x < dxyz.x) // negative scale, reverse extent sum, flip equality ||(dxyz.x < 0 && b.topLeft.x-b.bottomRight.x > dxyz.x)) return false; // check for y axis separation if ((dxyz.y >= 0 && a.bottomRight.y-a.topLeft.y < dxyz.y) // negative scale, reverse extent sum, flip equality ||(dxyz.y < 0 && b.topLeft.y-b.bottomRight.y > dxyz.y)) return false; // check for z axis separation if ((dxyz.z >= 0 && a.bottomRight.z-a.topLeft.z < dxyz.z) // negative scale, reverse extent sum, flip equality ||(dxyz.z < 0 && b.topLeft.z-b.bottomRight.z > dxyz.z)) return false; // not separated on any axis, overlapping return true; } public static boolean isContactEdge(int xyzAxis, BoundingBox a, BoundingBox b) { switch(xyzAxis) { case XYZ.XCOORD: if(a.topLeft.x == b.bottomRight.x || a.bottomRight.x == b.topLeft.x) return true; return false; case XYZ.YCOORD: if(a.topLeft.y == b.bottomRight.y || a.bottomRight.y == b.topLeft.y) return true; return false; case XYZ.ZCOORD: if(a.topLeft.z == b.bottomRight.z || a.bottomRight.z == b.topLeft.z) return true; return false; } return false; } /** * Sweep test min extent value * @param box * @param xyzCoord * @return */ public static float min(BoundingBox box, int xyzCoord) { switch(xyzCoord) { case XYZ.XCOORD: return box.topLeft.x; case XYZ.YCOORD: return box.topLeft.y; case XYZ.ZCOORD: return box.topLeft.z; default: return 0f; } } /** * Sweep test max extent value * @param box * @param xyzCoord * @return */ public static float max(BoundingBox box, int xyzCoord) { switch(xyzCoord) { case XYZ.XCOORD: return box.bottomRight.x; case XYZ.YCOORD: return box.bottomRight.y; case XYZ.ZCOORD: return box.bottomRight.z; default: return 0f; } } /** * Test if bounding box A will overlap bounding box B at any point * when box A moves from position 0 to position 1 and box B moves from position 0 to position 1 * Note, sweep test assumes bounding boxes A and B's dimensions do not change * * @param a0 box a starting position * @param a1 box a ending position * @param b0 box b starting position * @param b1 box b ending position * @param aCollisionOut xyz of box a's position when/if a collision occurs * @param bCollisionOut xyz of box b's position when/if a collision occurs * @return */ public static boolean sweepTest(BoundingBox a0, BoundingBox a1, BoundingBox b0, BoundingBox b1, XYZ aCollisionOut, XYZ bCollisionOut) { // solve in reference to A XYZ va = new XYZ(a1.topLeft.x-a0.topLeft.x, a1.topLeft.y-a0.topLeft.y, a1.topLeft.z-a0.topLeft.z); XYZ vb = new XYZ(b1.topLeft.x-b0.topLeft.x, b1.topLeft.y-b0.topLeft.y, b1.topLeft.z-b0.topLeft.z); XYZ v = new XYZ(vb.x-va.x, vb.y-va.y, vb.z-va.z); // check for initial overlap if(BoundingBox.isOverlapping(a0, b0)) { // java pass by ref/value gotcha, have to modify value can't reassign it aCollisionOut.x = a0.topLeft.x; aCollisionOut.y = a0.topLeft.y; aCollisionOut.z = a0.topLeft.z; bCollisionOut.x = b0.topLeft.x; bCollisionOut.y = b0.topLeft.y; bCollisionOut.z = b0.topLeft.z; return true; } // overlap min/maxs XYZ u0 = new XYZ(); XYZ u1 = new XYZ(1,1,1); float t0, t1; // iterate axis and find overlaps times (x=0, y=1, z=2) for(int i = 0; i < 3; i++) { float aMax = max(a0, i); float aMin = min(a0, i); float bMax = max(b0, i); float bMin = min(b0, i); float vi = XYZ.getCoord(v, i); if(aMax < bMax && vi < 0) XYZ.setCoord(u0, i, (aMax-bMin)/vi); else if(bMax < aMin && vi > 0) XYZ.setCoord(u0, i, (aMin-bMax)/vi); if(bMax > aMin && vi < 0) XYZ.setCoord(u1, i, (aMin-bMax)/vi); else if(aMax > bMin && vi > 0) XYZ.setCoord(u1, i, (aMax-bMin)/vi); } // get times of collision t0 = Math.max(u0.x, Math.max(u0.y, u0.z)); t1 = Math.min(u1.x, Math.min(u1.y, u1.z)); // collision only occurs if t0 < t1 if(t0 <= t1 && t0 != 0) // not t0 because we already tested it! { // t0 is the normalized time of the collision // then the position of the bounding boxes would // be their original position + velocity*time aCollisionOut.x = a0.topLeft.x + va.x*t0; aCollisionOut.y = a0.topLeft.y + va.y*t0; aCollisionOut.z = a0.topLeft.z + va.z*t0; bCollisionOut.x = b0.topLeft.x + vb.x*t0; bCollisionOut.y = b0.topLeft.y + vb.y*t0; bCollisionOut.z = b0.topLeft.z + vb.z*t0; return true; } else return false; } }

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• How to make a python script run in Anacron

  - by Jeremy

  I have a python script that I would like to run daily using anacron, but I haven't been able to get it to work. The script is in my home directory, and I have put a symlink to it in /etc/cron.daily/. I saw somewhere that things here can't have dots in the filename, so the symlink has the .py extension removed (the original file still has it). The python file does have #!/usr/bin/python on the first line. This is my first experience with cron / anacron, and so I'm sure I'm making a dumb mistake - I just don't know what it is. Is a symlink a problem? Do I need the actual file there? Is the python script the problem? Do I need to run a bash script that will open the python script? Is there something else I'm not thinking of?

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