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• Silverlight Cream for March 31, 2010 -- #826

  - by Dave Campbell

  In this Issue: Andrea Boschin, Radenko Zec, Andrej Tozon, Bobby Diaz, Brad Abrams, Wolf Schmidt, Colin Eberhardt, Anand Iyer, Matthias Shapiro, Jaime Rodriguez, Bill Reiss, and Lee. Shoutouts: Cigdem has a post up about here MIX10 Interviewing experiences: MIX10 SilverlightShow Interviews Ian T. Lackey has his material up from his talk Silverlight SEO at the St. Louis .Net Users Group Not Silverlight but definitely WP7 cool, Michael Klucher reports that there are New Windows Phone Samples on Creators Club Online Tim Heuer posted a survey: What tools are the minimum to get started in Silverlight? From SilverlightCream.com: A RoleManager to apply roles declaratively to user interface Andrea Boschin also has a new post at SilverlightShow discussing the use of a RoleManager in WCF RIA Services to apply user roles to elements of the UI... good stuff, Andrea. Virtualization in Silverlight 4 RC Radenko Zec has a post out at SilverlightShow where he explains UI and Data Virtualization then gives some examples of their use in Silverlight 4RC, and some issues as well. MS Word Mail Merge with Silverlight 4 COM Automation Andrej Tozon has a post up at SilverlightShow that I missed in the rush of MIX10. He's doing MailMerge with COM automation and Silverlight 4... actually prett cool stuff and all the source! KISS and Tell - MVVM and the ViewModelLocator Bobby Diaz is blogging about a very popular subject right now: ViewModelLocator. He's not showing production code, but it's a thought... check it out. Silverlight 4 + RIA Services - Ready for Business: Validating Data I'm running behind, but Brad Abrams' next post in his series is about validating data in the business application. He also discusses setting up shared code validation. A One-stop Shopping XAML Namespace for Silverlight Client SDK Controls Wolf Schmidt at the Silverlight SDK has a post up highlighting the SL4 XAML namespace prefix. He starts with SL3 then demonstrates the feature's use in SL4. Binding a Silverlight 3 DataGrid to dynamic data via IDictionary (Updated) Colin Eberhardt has an update to his previous article of the same title. This one is a bug fix on an upgrade to SL3 and also an expansion of the previous post. Demo Apps from MIX10 on Windows Phone 7 Anand Iyer posted links to all the WP7 demos used at MIX10 and at least in the case of FourSquare, the source is on CodePlex. XAML Files for Location Visualizations in Silverlight and WPF Matthias Shapiro has graciously provided XAML for us for Silverlight and WPF for a bunch of different US maps... too cool, now we don't have to be asking 'where did you get that map?'... thanks Matthias! Theming in Windows Phone Jaime Rodriguez has a post up that deep-dives theming in general and demonstrates using it on WP7... end-user configurations and developer stuff. Space Rocks game step 7: Moving the ship It appears that in the heat of battle (blogging) I said Bill Reiss' Space Rocks game he's building is for WP7... obviously it's not, but it's a game folks... :) THis is Episode 7 and he's moving the ship now. SL4(RC) RichTextBox and Access Violation Lee has some code that looks like it should work for a RichTextBox in SL4RC, and it's throwing an error... see if you have a solution for him... or is it a bug? 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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• What I've Gained from being a Presenter at Tech Events

  - by MOSSLover

  Originally posted on: http://geekswithblogs.net/MOSSLover/archive/2014/06/12/what-ive-gained-from-being-a-presenter-at-tech-events.aspxI know I fail at blogging lately.  As I've said before life happens and it gets in the way of best laid out plans.  I thought about creating some type of watch with some app that basically dictates using dragon naturally speaking to Wordpress, but alas no time and the write processing capabilities just don't exist yet.So to get to my point Alison Gianotto created this blog post: http://www.snipe.net/2014/06/why-you-should-stop-stalling-and-start-presenting/.  I like the message she has stated in this post and I want to share something personal.It was around 2007 that I was seriously looking into leaving the technology field altogether and going back to school.  I was calling places like Washington University in Saint Louis and University of Missouri Kansas City asking them how I could go about getting into some type of post graduate medical school program.  My entire high school career was based on Medical Explorers and somehow becoming a doctor.  I did not want to take my hobby and continue using it as a career mechanism.  I was unhappy, but I didn't realize why I was unhappy at the time.  It was really a lot of bad things involving the lack of self confidence and self esteem.  Overall I was not in a good place and it took me until 2011 to realize that I still was not in a good place in life.So in about April 2007 or so I started this blog that you guys have been reading or occasionally read.  I kind of started passively stalking people by reading their blogs in the SharePoint and .Net communities.  I also started listening to .Net Rocks & watching videos on their corresponding training for SharePoint, WCF, WF, and a bunch of other technologies.  I wanted more knowledge, so someone suggested I go to a user group.  I've told this story before about how I met Jeff Julian & John Alexander, so that point I will spare you the details.  You know how I got to my first user group presentation and how I started getting involved with events, so I'll also spare those details.The point I want to touch on is that I went out I started speaking and that path I took helped me gain the self confidence and self respect I needed.  When I first moved to NYC I couldn't even ride a subway by myself or walk alone without getting lost.  Now I feel like I can go out and solve any problem someone throws at me.  So you see what Alison states in her blog post is true and I am a great example to that point.  I stood in front of 800 or so people at SharePoint Conference in 2011 and spoke about a topic.  In 2007 I would have hidden or stuttered the entire time.  I have now spoken at over 70 events and user groups.  I am a top 25 influencer in my technology.  I was a most valued professional for years in a row in Microsoft SharePoint.  People are constantly trying to gain my time, so that they can pick my brain for solutions and other life problems.  I went from maybe five or six friends to over hundreds of friends in various cities across the globe.  I'm not saying it's an instant fame and it doesn't take a ton of work, but I have never looked back once at my life and regretted the choice I made in 2007.  It has lead me to a lot of other things in my life, including more positivity and happiness.  If anyone ever wants to contact me and pick my brain on a presentation go ahead.  If you want me to help you find the best meetup that suits you for that presentation I can try to help too (I might be a little more helpful in the Microsoft or iOS arenas though).  The best thing I can state is don't be scared just do it.  If you need an audience I can try to pencil it in my schedule.  I can't promise anything, but if you are in NYC I can at least try.

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• Silverlight Cream for May 08, 2010 -- #858

  - by Dave Campbell

  In this Issue: Phil Middlemiss, Jaime Rodriguez, Senthil Kumar, Mike Snow, DaveDev, Gergely Orosz, Kirupa, Cheryl Simmons, András Velvárt, Dan Wahlin, Michael D. Brown, and Ben Rush. Shoutouts: Erik Mork and crew have their latest up: This Week In Silverlight – Where’s the Tablet? Chris Rouw has a good link post and instructions on WCF RIA services: Deploying and Configuring Silverlight 4 and WCF RIA Services From SilverlightCream.com: Quick and Easy Sscalable Rounded Bevels Phil Middlemiss duplicates some bevel-edged rectangles in Blend, and they look great. Now you don't have to import all the other PhotoShop bits to get those things looking the way you want! A transparent Windows PHONE FAQ Jaime Rodriguez combined a bunch of information into a WP7 FAQ that he's going to keep up to date, so bookmark the page. He also has links to the Training Kit, on and offline versions. Windows Phone Developer Training Kit April Refresh is now available for Download Thanks to Senthil Kumar, I found out there is an April refresh of the WP7 Training kit at Channel 9 -- go get yours now --- I'll still be here when you get back! Silverlight Tip of the Day #16 – Working with IgnoreImageCache Mike Snow's Tip of the day #16 covers IgnoreImageCache and like many other things in life, until you read Mike's post you may be surprised at how it works. DoodlePad – A fun, free, sketching application for Windows Phone 7 DaveDev has a new WP7 App up that lets you or your kids 'Doodle' on the phone... could be a note, or could be a drawing... good post with all the links you need to get this cranked up on the emulator. Printing in Silverlight: Printing Charts and Auto Scaling Gergely Orosz's latest post is a very useful one on auto-scaling charts to fit a printed page and then getting them to print. Smoothly Scrolling a ListBox Check out the smooth scrolling Kirupa has on the ListBox near the top of his post... all good stuff... you wanna know how to do that! Plus... it's dead simple and all in Blend :) http://www.sparklingclient.com/wheres-the-silverlight-tablet/ Cheryl Simmons has a great tip up at the SilverlightSDK if you haven't burned through to figure it out yet ... changing the watermark on a DatePicker control... looks great! The story of a wicked bug András Velvárt tells a story of a bug that just defied logic or being found. Read how he tracked it down and what it actually was... could save you some time. Story learned: if I have a problem that bad, I'm calling András :) Text Trimming in Silverlight 4 Dan Wahlin gives a quick run-through of what TextBox trimming is, and then by a good real example... check it out and start using it in your projects. Enterprise Patterns with WCF RIA Services Michael D. Brown has an article in MSDN Magazine on RIA Services. Great information and link-packed article, with all the source avialable for download. Building Custom Players with the Silverlight Media Framework Ben Rush has a nice long tutorial on the Silverlight Media Framework up on the MSDN Magazine site ... lots of information in there. 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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• Improving performance of a particle system (OpenGL ES)

  - by Jason

  I'm in the process of implementing a simple particle system for a 2D mobile game (using OpenGL ES 2.0). It's working, but it's pretty slow. I start getting frame rate battering after about 400 particles, which I think is pretty low. Here's a summary of my approach: I start with point sprites (GL_POINTS) rendered in a batch just using a native float buffer (I'm in Java-land on Android, so that translates as a java.nio.FloatBuffer). On GL context init, the following are set: GLES20.glViewport(0, 0, width, height); GLES20.glClearColor(0.0f, 0.0f, 0.0f, 0.0f); GLES20.glEnable(GLES20.GL_CULL_FACE); GLES20.glDisable(GLES20.GL_DEPTH_TEST); Each draw frame sets the following: GLES20.glEnable(GLES20.GL_BLEND); GLES20.glBlendFunc(GLES20.GL_ONE, GLES20.GL_ONE_MINUS_SRC_ALPHA); And I bind a single texture: GLES20.glActiveTexture(GLES20.GL_TEXTURE0); GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textureHandle); GLES20.glUniform1i(mUniformTextureHandle, 0); Which is just a simple circle with some blur (and hence some transparency) http://cl.ly/image/0K2V2p2L1H2x Then there are a bunch of glVertexAttribPointer calls: mBuffer.position(position); mGlEs20.glVertexAttribPointer(mAttributeRGBHandle, valsPerRGB, GLES20.GL_FLOAT, false, stride, mBuffer); ...4 more of these Then I'm drawing: GLES20.glUniformMatrix4fv(mUniformProjectionMatrixHandle, 1, false, Camera.mProjectionMatrix, 0); GLES20.glDrawArrays(GLES20.GL_POINTS, 0, drawCalls); GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, 0); My vertex shader does have some computation in it, but given that they're point sprites (with only 2 coordinate values) I'm not sure this is the problem: #ifdef GL_ES // Set the default precision to low. precision lowp float; #endif uniform mat4 u_ProjectionMatrix; attribute vec4 a_Position; attribute float a_PointSize; attribute vec3 a_RGB; attribute float a_Alpha; attribute float a_Burn; varying vec4 v_Color; void main() { vec3 v_FGC = a_RGB * a_Alpha; v_Color = vec4(v_FGC.x, v_FGC.y, v_FGC.z, a_Alpha * (1.0 - a_Burn)); gl_PointSize = a_PointSize; gl_Position = u_ProjectionMatrix * a_Position; } My fragment shader couldn't really be simpler: #ifdef GL_ES // Set the default precision to low. precision lowp float; #endif uniform sampler2D u_Texture; varying vec4 v_Color; void main() { gl_FragColor = texture2D(u_Texture, gl_PointCoord) * v_Color; } That's about it. I had read that transparent pixels in point sprites can cause issues, but surely not at only 400 points? I'm running on a fairly new device (12 month old Galaxy Nexus). My question is less about my approach (although I'm open to suggestion) but more about whether there are any specific OpenGL "no no's" that have leaked into my code. I'm sure there's GL master out there facepalming right now... I'd love to hear any critique.

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• Silverlight Cream for February 13, 2011 -- #1046

  - by Dave Campbell

  In this Issue: Loek van den Ouweland, Colin Eberhardt, Rudi Grobler, Joost van Schaik, Mike Taulty(-2-, -3-), Deborah Kurata, David Kelley, Peter Foot, Samuel Jack(-2-), and WindowsPhoneGeek(-2-). Above the Fold: Silverlight: "Silverlight Simple MVVM Commanding" Deborah Kurata WP7: "WP7 CustomInputPrompt control with Cancel button" WindowsPhoneGeek Expression Blend: "Silverlight Templated Image Button with two images" Loek van den Ouweland Shoutouts: Dave Campbell posted a write-up about the project he's on and the use of Sterling: Sterling Object-Oriented Database for ISO 1.0 Released!... Also see Jeremy Likness' post on the 1.0 release: Sterling Object-Oriented Database 1.0 RTM Not necessarily Silverlight, but darn cool, a great control by Sasha Barber: WPF : A Weird 3d based control snoutholder announced new content: Windows Phone 7 QuickStarts Live! From SilverlightCream.com: Silverlight Templated Image Button with two images Loek van den Ouweland has a video tutorial up for creating an ImageButton with a hover state... Expression Blend coolness, and check out the external links he has to their training site. Windows Phone 7 Performance Measurements – Emulator vs. Hardware Colin Eberhardt's latest is a popular post comparing performance metrics between the WP7 emulator and a real device. Mileage may vary, but I'm pretty sure the overall results are conculsive, and should help the way you view your app as you're building in the emulator. WP7: WebClient vs HttpWebRequest Rudi Grobler's latest is a discussion of WebClient and HttpWebRequest, gives coding examples of each plus discussion of why you may choose one over the other... and pay attention to his comment about mobile providers. A Blendable Windows Phone 7 / Silverlight clipping behavior Joost van Schaik posted this WP7/Silverlight clipping behavior he developed because all the other solutions were not blendable. Another really useful piece of code from Joost! Blend Bits 22–Being Stylish Mike Taulty has 3 more episodes in his Blend Bits series... first up is on one Styles... explicit, implicit, inheriting... you name it, he's covering it! Blend Bits 23–Templating Part 1 MIke Taulty then has the beginning of a series within his Blend Bits series on Templating. This is something you just have to either bite the bullet and go with Blend to do, or consume someone else's work. Mike shows us how to do it ourself by tweaking the visual aspects of a checkbox Blend Bits 24–Templating Part 2 In part 2 of the Templating series, Mike Taulty digs deeper into Blend and cracks open the Listbox control to take a bunch of the inner elements out for a spin... fun stuff and great tutorial, Mike! Silverlight Simple MVVM Commanding Deborah Kurata has another great MVVM post up... if you don't have your head wrapped around commanding yet, this is a good place to start that process... VB and C# as always. App Development for Windows Phone 7 101 David Kelley goes through the basics of producing a WP7 app both from the Silverlight and XNA side... good info and good external links to get you going. Copyable TextBlock for Windows Phone Peter Foot takes a look at the Copy/Paste functionality in WP7 and how to apply it to a TextBlock... which is NOT an out-of-the-box solution. How to deploy to, and debug, multiple instances of the Windows Phone 7 emulator Samuel Jack has a couple posts up this week... first is this clever one on running multiple copies of the emulator at once... too cool for debugging a multi-player game! Multi-player enabling my Windows Phone 7 game: Day 3 – The Server Side Samuel Jack's latest is a detailed look at his day 3 adventure of taking his multi-player game to WP7... lots of information and external links... what do you say, give him another day? :) WP7 CustomInputPrompt control with Cancel button WindowsPhoneGeek has a couple more posts up... first is this "CustomInputPrompt" control based off the InputPrompt from Coding4Fun. Implementing Windows Phone 7 DataTemplateSelector and CustomDataTemplateSelector In his latest post, WindowsPhoneGeek writes a DataTemplateSelector to allow different data templates for different list elements based on the type of the element. 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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• 12.04 installation started to black screen during boot today

  - by Cedric

  NOTE: Most of this question is now irrelevant. UPDATE 3 summarizes the problem as it stands. I've been running 12.04 on my Lenovo laptop for one month now (updated from 11.04), and I have not had any significant problem until today. This morning, when I boot, I pass the Grub screen, then I get to the purple loading screen with dots as usual, then for some reason I got to the terminal login, with no GUI. startx gives me a black screen. Ctrl+F7-F8 didn't help either. It's similar to: After the update today no graphical interface anymore - 12.04 I followed the instructions at the end, to flush the ATI drivers (which I had installed), and fall back to the community drivers. That made me lose the login! Now I just get a black screen after the Ubuntu loading screen. I can still access the console through recovery, and I've gotten into VESA mode once or twice (not reproducible, for some reason). I've tried various permutations of xorg.conf, without success. Xorg -configure fails for now, though I might be able to get it to work. apt-get update/upgrade doesn't improve anything either. However, both Windows and the 12.04 Live CD still work beautifully, and I know that all my data is still there. Is there any way that I could somehow take the configuration from the Live CD and roll with it? I know that I could reinstall, but that sucks, frankly, especially given that there's no straight-forward way of keeping the home (which, incidentally, is unaccessible from the Live CD) Thank you. Update: it seems that the fglrx drivers are still active, even after I've --purged them. From Xorg.0.log: [ 18.235] (WW) fglrx(0): *********************************************************** [ 18.235] (WW) fglrx(0): * DRI initialization failed * [ 18.235] (WW) fglrx(0): * kernel module (fglrx.ko) may be missing or incompatible * [ 18.235] (WW) fglrx(0): * 2D and 3D acceleration disabled * [ 18.235] (WW) fglrx(0): *********************************************************** [ 18.235] Fatal server error: [ 18.235] AddScreen/ScreenInit failed for driver 0 There's also a mention of the "fbdev" module. What is it? PARTIALLY SOLVED: I've undone the damage from the fglrx purge. I'm still mystified as to why uninstalling the packages didn't kill fglrx entirely, but I've now recovered the prompt. The solution to the DRI initialization error was to add radeon.modeset=0 to the GRUB boot options. So I'm back to being dropped to a prompt without any GUI. startx gives me a bunch of messages, though no obvious errors. I have little reason to suspect the video drivers, as they worked fine before today. There is no apparent error message in any of the log files. UPDATE: When I startx, I get an error, Plymounth command failed mountall: Disconnected from Plymouth This is all over the Internet, but I have not found anything that works for me yet. UPDATE 3: If I press ESC during boot, the splash screen (Plymouth!) disappears, and I no longer have any error from Plymouth. The last error message is: Stopping mount filesystems on boot I can then Ctrl+Alt+F1 to get the TTY1, but startx still does not work. Sadly, the Internet knows nothing about this error message, and neither do I. Help!

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• Silverlight Cream for March 10, 2011 -- #1058

  - by Dave Campbell

  In this Issue: Ian T. Lackey, Peter Kuhn, WindowsPhoneGeek(-2-), Jesse Liberty(-2-), Martin Krüger, John Papa, Jeremy Likness, Karl Shifflett, and Colin Eberhardt. Above the Fold: Silverlight: "Silverlight TV 65: 3D Graphics" John Papa WP7: "Developing a Windows Phone 7 Jump List Control" Colin Eberhardt Shoutouts: Telerik announced a special sale on their RadControls for WP7... check it out: RadControls for Windows Phone 7 - on Sale from March 16th at a Special Promo Price! From SilverlightCream.com: Prism BootStrapper Load ModuleCatalog Ansyc Ian T. Lackey has a post up about reading the module catalog for Prism from an XML file asynchronously... fun stuff... this is how we kick-started our app... XNA for Silverlight developers: Part 6 - Input (accelerometer) Peter Kuhn has Part 6 of his XNA for Silverlight devs up at SilverlightShow. This post is on the use of the accelerometer... some great diagrams and explanations of it's use along with some code to play with... including a 'problems and pitfalls' section, and some good external links. Getting Started with Unit Testing in Silverlight for WP7 WindowsPhoneGeek has an introduction to Unit Testing in general, and then moves into Unit Testing in Silverlight for WP7, providing 3 options with links to the materials and code demonstrating the concepts. Using DockPanel in WP7 Responding to reader's questions, WindowsPhoneGeek's next post is on the DockPanel from the Silverlight Toolkit, and using it in WP7... defined declaratively and in code. Reactive Extensions–More About Chaining Jesse Liberty has post number 10 on Rx up and is a follow-on to the last one on Chaining. This time he exercises the chaining aspect of SelectMany. Yet Another Podcast #26–Walt Ritscher In his next post, Jesse Liberty has his 26th 'Yet Another Podcast' up and is chatting with my friend Walt Ritscher. If you don't know who Walt is, check out the links Jesse has on the post... I'm sure you've crossed paths. How to: Create A half square from a regular polygon (triangle) Martin Krüger demonstrates the exact placement of a half-square (isosceles right triangle), formed with a regular polygon in Blend... this is much more involved than I've made it sound... check out his post. Silverlight TV 65: 3D Graphics John Papa has Silverlight TV number 65 up and it's all about the 3D graphics stuff we saw at the Firestarter. John is talking with Danny Riddel, the CEO of Archetype, the company that built the awesome 3D demo we all gushed over. Jounce Part 12: Providing History-Based Back Navigation Jeremy Likness has part 12 of his Jounce exploration up... and discussing the stack of navigated pages that Jounce retains and providing a 'go back' functionality... and provides a good example of using it all. Prism 4 Region Navigation with Silverlight Frame Navigation and Unity Karl Shifflett has a post for all us Prism afficianados... Prism, Unity, and the Silverlight Frame Navigation framework. Some great external links for 'required reading' too. Developing a Windows Phone 7 Jump List Control Colin Eberhardt has an awesome tutorial up for creating a JumpList control for WP7... what a bunch of effort... this is a step-by-step description of designing the control he built and blogged about a while back... and it's still cool! 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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• Pondering New Technology

  - by MOSSLover

  So I have been standing at the end of a fork for a year peering down a corner looking at this way and that way trying to figure out where I fit in.  I was so enthusiastic and excited about Silverlight when it came out.  It was this amazing awesome technology that had this really cool animation and webcam/multimedia piece.  I thought if I put my money on Silverlight it’s going somewhere, then HTML 5 came out and the wind shifted.  I realized times were changing. I have been working with web technologies since I was 15 years old.  Playing with html and javascript and even css back when it first came out.  In tech years 15 years is forever.  Things change so quickly and so often.  So I guess the question is where am I heading?  The answer is mobile technology.  For some reason I was resisting change and I have no idea why.  I guess I really wanted to see more than one player.  I didn’t quite feel that Microsoft was ready with Windows Phone 7.  It was a great start, but it just didn’t feel like they went all the way.  Now with Windows 8 it feels like they are at version 2.0.  It’s like hitting Silverlight 2.0 where they finally added the .Net bits.  The path is paved, but we don’t know where it’s leading.  Then we had 3.0, 4.0, and 5.0 to mature the technology into what it is today (man I’m hoping they are going to roll some of the cool bits into other tech if they don’t exist). Anyway, I’m on board, but I’m not buying a Windows Tablet just yet.  I was hoping for a 7 inch screen from Apple around $300 or just above and a 7 inch screen from the MS side around the same price.  What I got was the Apple side, but nothing from Microsoft.  I was pretty disappointed with the $500 market price on the RT version.  I realized Microsoft is close, but not quite where Apple is today.  Yes the devices have Office that they are offering, but the sticker is just too much for a first generation device.  If you guys remember correctly the first generation iPad was quite expensive.  I guess for a 1st generation device $500 is pretty good. So I guess what I’m trying to say is that I am shifting my focus entirely away from Silverlight and more towards mobile.  I will be doing a lot of postings on iOS, Windows 8, and Windows Phone 8 with SharePoint 2013.  Since I don’t have a tablet and don’t foresee myself buying one just yet it might be mostly on the phones for right now.  I want to do a bunch of testing on various devices on what needs to be done in apps on each device.  I might add a bit on porting code from one to the other.  I think it’s going to be a lot of fun and make things flow a little better for me.  In a way it’s kind of like Star Trek 6 where they talk about the Undiscovered Country.  I’m going to jump forward completely and see where I land. Technorati Tags: SharePoint 2013,Mobile,Windows 8,iOS

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• Silverlight Cream for March 08, 2011 -- #1056

  - by Dave Campbell

  In this Issue: Joost van Schaik, Manas Patnaik, Kevin Hoffman, Jesse Liberty, Deborah Kurata, Dhananjay Kumar, Dennis Delimarsky, Samuel Jack, Peter Kuhn, WindowsPhoneGeek, and Jfo. Above the Fold: Silverlight: "How I let the trees grow" Peter Kuhn WP7: "Simple Windows Phone 7 / Silverlight drag/flick behavior" Joost van Schaik Shoutouts: SilverlightShow has their top 5 from last week posted, plus the ECOContest is ready to be voted on: SilverlightShow for Feb 28 - March 06, 2011 Drew DeVault is a young man involved with the Microsoft Student Insiders. He gave a WP7 presentation at RMTT and has posted his material: Post-Session: Windows Phone 7 @ RMTT Rui Marinho has an app in the ECO Contest called Forest Findr. is based on the BIng Map Control for silverlight and Sql Spatial data, and helps you find Forests and get geolocated pictures and wikipedia information, and has a post up with a bunch of info on it here: Forest Findr. my entry on the SilverlightShow EcoContest From SilverlightCream.com: Simple Windows Phone 7 / Silverlight drag/flick behavior Joost van Schaik has a behavior that makes *anything* draggable and 'flickable' in WP7 ... read the intro, scroll to the bottom to watch the demo, and then grab up the code... cool stuff, Joost! Data Aggregation Using Presentation Model in RIA and Silverlight 4 Manas Patnaik sent me a link to his blog, and it appears he's got lots of Silverlight goodness out there so you'll be hearing more about him. This first post is on the Presentation Model in RIA and Silverlight 4... good discussion, diagrams and code... good job, Manas! WP7 for iPhone and Android Developers - Advanced UI Kevin Hoffman has part 3 of an ambitious 12-part tutorial series up on WP7 development ... this go-around is concentrating on Advanced UI - Panorama/Pivot controls, DataBinding, ObservableCollections, and Converters... whew! Sterling DB on top of Isolated Storage – 2 Jesse Liberty has part 2 of his Sterling series up... this time setting up the database in App.xaml so it can be used for dealing with tombstoning. Silverlight Charting: Formatting the Tick Marks Deborah Kurata's next chart tutorial is all about showing you how to continue to dress up your charts.. this time by formatting the tick marks... if you don't know what that is... check out the first image in the post. Stored Procedure in WCF Data Service Dhananjay Kumar has a very nice tutorial up on using a stored proc with WCF Data Services... I happen to know someone working on just that at this time. If you have this in mind, here's a step-by-step guide to getting it done. Windows Phone 7 – Episode 5 – Pages Dennis Delimarsky has part 5 of his WP7 tutorial series up and is discussing Pages in this 17 minute video. Unpacking Simon Squared: My mini framework-independent animation library Samuel Jack has not only Open-Sourced the WP7 game he built and blogged about, but he's now explaining some of the structure of the game in posts such as this one about the animation library he wrote that his game is built on. How I let the trees grow Peter Kuhn shares with us the code he used for the tree animation in his ECO Contest entry. There's a lot to learn in this post about performance ... the fully-animated tree has about 20K elements... 5K branches and 20K leaves... check it out. WP7 ToastPrompt in depth WindowsPhoneGeek takes a deep dive into the ToastPrompt control in the Coding4fun Toolkit... everything you need to completely use the control including sample code. Beware the loaded event Jfo talks about another frustration point she had with WP7 development, and that is around the use of the loaded event... read these tips from someone that's been there. 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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• Implementing features in an Entity System

  - by Bane

  After asking two questions on Entity Systems (1, 2), and reading some articles on them, I think that I understand them much better than before. But, I still have some uncertainties, and mainly they are about building a Particle Emitter, an Input system, and a Camera. I obviously still have some problems understanding Entity Systems, and they might apply to a whole other range of objects, but I chose these three because they are very different concepts and should cover a pretty big ground, and help me understand Entity Systems and how to handle problems like these myself, as they come along. I am building an engine in Javascript, and I've implemented most of the core features, which include: input handling, flexible animation system, particle emitter, math classes and functions, scene handling, a camera and a render, and a whole bunch of other things that engines usually support. Then, I read Byte56's answer that got me interested into making the engine into an Entity System one. It would still remain an HTML5 game engine with the basic Scene philosophy, but it should support dynamic creation of entities from components. These are some of the definitions from the previous questions, updated: An Entity is an identifier. It doesn't have any data, it's not an object, it's a simple id that represents an index in the Scene's list of all entities (which I actually plan to implement as a component matrix). A Component is a data holder, but with methods that can operate on that data. The best example is a Vector2D, or a "Position" component. It has data: x and y, but also some methods that make operating on the data a bit easier: add(), normalize(), and so on. A System is something that can operate on a set of entities that meet the certain requirements, usually they (the entities) need to have a specified (by the system itself) set of components to be operated upon. The system is the "logic" part, the "algorithm" part, all the functionality supplied by components is purely for easier data management. The problem that I have now is fitting my old engine concept into this new programming paradigm. Lets start with the simplest one, a Camera. The camera has a position property (Vector2D), a rotation property and some methods for centering it around a point. Each frame, it is fed to a renderer, along with a scene, and all the objects are translated according to it's position. Then the scene is rendered. How could I represent this kind of an object in an Entity System? Would the camera be an entity or simply a component? A combination (see my answer)? Another issues that is bothering me is implementing a Particle Emitter. For what exactly I mean by that, you can check out my video of it: http://youtu.be/BObargIMQsE. The problem I have with this is, again, what should be what. I'm pretty sure that particles themselves shouldn't be entities, as I want to support 10k+ of them, and creating that much entities would be a heavy blow on my performance, I believe. Or maybe not? Depends on the implementation, but anyone with experience: please, do answer. The last bit I wan't to talk about, which is also bugging me the most, is how input should be handled. In my current version of the engine, there is a class called Input. It's a handler that subscribes to browser's events, such as keypresses, and mouse position changes, and also it maintains an internal state. Then, the player class has a react() method, which accepts an input object as an argument. The advantage of this is that the input object could be serialized into JSON and then shared over the network, allowing for smooth multiplayer simulations. But how does this translate into an Entity System?

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• SFML fail to load image as texture

  - by zyeek

  I have come to a problem with the code below ... Using SFML 2.0 #include <SFML/Graphics.hpp> #include <iostream> #include <list> int main() { float speed = 5.0f; // create the window sf::RenderWindow window(sf::VideoMode(sf::VideoMode::getDesktopMode().height - 300, 800), "Bricks"); // Set game window position on the screen window.setPosition( sf::Vector2i(sf::VideoMode::getDesktopMode().width/4 + sf::VideoMode::getDesktopMode().width/16 , 0) ); // Allow library to accept repeatitive key presses (i.e. holding key) window.setKeyRepeatEnabled(true); // Hide mouse cursor //window.setMouseCursorVisible(false); // Limit 30 frames per sec; the minimum for all games window.setFramerateLimit(30); sf::Texture texture; if (!texture.loadFromFile("tile.png", sf::IntRect(0, 0, 125, 32))) { std::cout<<"Could not load image\n"; return -1; } // Empty list of sprites std::list<sf::Sprite> spriteContainer; bool gameFocus = true; // run the program as long as the window is open while (window.isOpen()) { sf::Vector2i mousePos = sf::Mouse::getPosition(window); // check all the window's events that were triggered since the last iteration of the loop sf::Event event; while (window.pollEvent(event)) { float offsetX = 0.0f, offsetY = 0.0f; if(event.type == sf::Event::GainedFocus) gameFocus = !gameFocus; else if(event.type == sf::Event::LostFocus) gameFocus = !gameFocus; if(event.type == sf::Event::KeyPressed) { if (event.key.code == sf::Keyboard::Space) { if(gameFocus) { // Create sprite and add features before putting it into container sf::Sprite sprite(texture); sprite.scale(.9f,.7f); sf::Vector2u textSize = texture.getSize(); sprite.setPosition(sf::Vector2f(mousePos.x-textSize.x/2.0f, mousePos.y - textSize.y/2.0f)); spriteContainer.push_front(sprite); } } if(event.key.code == sf::Keyboard::P) std::cout << spriteContainer.size() << std::endl; if( event.key.code == sf::Keyboard::W ) offsetY -= speed; if( event.key.code == sf::Keyboard::A ) offsetX -= speed; if( event.key.code == sf::Keyboard::S ) offsetY += speed; if( event.key.code == sf::Keyboard::D ) offsetX += speed; } // "close requested" event: we close the window if (event.type == sf::Event::Closed || event.key.code == sf::Keyboard::Escape) window.close(); // Move all sprites synchronously for (std::list<sf::Sprite>::iterator sprite = spriteContainer.begin(); sprite != spriteContainer.end(); ++sprite) sprite->move(offsetX, offsetY); //sprite.move(offsetX,offsetY); } // clear the window with black color window.clear(sf::Color::Black); // draw everything here... // window.draw(...); // Draw all sprites in the container for (std::list<sf::Sprite>::iterator sprite = spriteContainer.begin(); sprite != spriteContainer.end(); ++sprite) window.draw(*sprite); // end the current frame window.display(); } return 0; } A couple weeks ago it worked flawlessly to my expectation, but now that I come back to it and I am having problems importing the image as a texture "tile.png". I don't understand why this is evening happening and the only message I get via the terminal is "Cannot load image ..." then a bunch of random characters. My libraries are for sure working, but now I am not sure why the image is not loading. My image is in the same directory as with my .h and .cpp files. This is an irritating problem that keep coming up for some reason and is always a problem to fix it. I import my libraries via my own directory "locals" which contain many APIs, but I specifically get SFML, and done appropriately as I am able to open a window and many other stuff.

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• TechEd Israel 2010 may only accept speakers from sponsors

  - by RoyOsherove

  A month or so ago, Microsoft Israel started sending out emails to its partners and registered event users to “Save the date!” – Micraoft Teched Israel is coming, and it’s going to be this november! “Great news” I thought to myself. I’d been to a couple of the MS teched events, as a speaker and as an attendee, and it was lovely and professionally done. Israel is an amazing place for technology and development and TechEd hosted some big names in the world of MS software. A couple of weeks ago, I was shocked to hear from a couple of people that Microsoft Israel plans to only accept non-MS teched speakers, only from sponsors of the event. That means that according to the amount that you have paid, you get to insert one or more of your own selected speakers as part of teched. I’ve spent the past couple of weeks trying to gather more evidence of this, and have gotten some input from within MS about this information. It looks like that is indeed the case, though no MS rep. was prepared to answer any email I had publicly. If they approach me now I’d be happy to print their response. What does this mean? If this is true, it means that Microsoft Israel is making a grave mistake – They are diluting the quality of the speakers for pure money factors. That means, that as a teched attendee, who paid good money, you might be sitting down to watch nothing more that a bunch of infomercials, or sub-standard speakers – since speakers are no longer selected on quality or interest in their topic. They are turning the conference from a learning event to a commercial driven event They are closing off the stage to the community of speakers who may not be associated with any organization  willing to be a sponsor They are losing speakers (such as myself) who will not want to be part of such an event. (yes – even if my company ends up sponsoring the event, I will not take part in it, Sorry Eli!) They are saying “F&$K you” to the community of MVPs who should be the people to be approached first about technical talks (my guess is many MVPs wouldn’t want to talk at an event driven that way anyway ) I do hope this ends up not being true, but it looks like it is. MS Israel had already done such a thing with the Developer Days event previouly held in Israel – only sponsors were allowed to insert speakers into the event. If this turns out to be true I would urge the MS community in Israel to NOT TAKE PART AT THIS EVENT in any form (attendee, speaker, sponsor or otherwise). by taking part, you will be telling MS Israel it’s OK to piss all over the community that they are quietly suffocating anyway. The MVP case MS Israel has managed to screw the MVP program as well. MS MVPs (I’m one) have had a tough time here in Israel the past couple of years. ever since yosi taguri left the blue badge ranks, there was not real community leader left. Whoever runs things right now has their eyes and minds set elsewhere, with the software MVP community far from mind and heart. No special MVP events (except a couple of small ones this year). No real MVP leadership happens here, with the MVP MEA lead (Ruari) being on a remote line, is not really what’s needed. “MVP? What’s that?” I’m sure many MS Israel employees would say. Exactly my point. Last word I’ve been disappointed by the MS machine for a while now, but their slowness to realize what real community means in the past couple of years really turns me off. Maybe it’s time to move on. Maybe I shouldn’t be chasing people at MS Israel begging for a room to host the Agile Israel user group. Maybe it’s time to say a big bye bye and start looking at a life a bit more disconnected.

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• Project structure: where to put business logic

  - by Mister Smith

  First of all, I'm not asking where does business logic belong. This has been asked before and most answers I've read agree in that it belongs in the model: Where to put business logic in MVC design? How much business logic should be allowed to exist in the controller layer? How accurate is "Business logic should be in a service, not in a model"? Why put the business logic in the model? What happens when I have multiple types of storage? However people disagree in the way this logic should be distributed across classes. There seem to exist three major currents of thought: Fat model with business logic inside entity classes. Anemic model and business logic in "Service" classes. It depends. I find all of them problematic. The first option is what most Fowlerites stick to. The problem with a fat model is that sometimes a business logic funtion is not only related to a class, and instead uses a bunch of other classes. If, for example, we are developing a web store, there should be a function that calcs an order's total. We could think of putting this function inside the Order class, but what actually happens is that the logic needs to use different classes, not only data contained in the Order class, but also in the User class, the Session class, and maybe the Tax class, Country class, or Giftcard, Payment, etc. Some of these classes could be composed inside the Order class, but some others not. Sorry if the example is not very good, but I hope you understand what I mean. Putting such a function inside the Order class would break the single responsibility principle, adding unnecesary dependences. The business logic would be scattered across entity classes, making it hard to find. The second option is the one I usually follow, but after many projects I'm still in doubt about how to name the class or classes holding the business logic. In my company we usually develop apps with offline capabilities. The user is able to perform entire transactions offline, so all validation and business rules should be implemented in the client, and then there's usually a background thread that syncs with the server. So we usually have the following classes/packages in every project: Data model (DTOs) Data Access Layer (Persistence) Web Services layer (Usually one class per WS, and one method per WS method). Now for the business logic, what is the standard approach? A single class holding all the logic? Multiple classes? (if so, what criteria is used to distribute the logic across them?). And how should we name them? FooManager? FooService? (I know the last one is common, but in our case it is bad naming because the WS layer usually has classes named FooWebService). The third option is probably the right one, but it is also devoid of any useful info. To sum up: I don't like the first approach, but I accept that I might have been unable to fully understand the Zen of it. So if you advocate for fat models as the only and universal solution you are welcome to post links explaining how to do it the right way. I'd like to know what is the standard design and naming conventions for the second approach in OO languages. Class names and package structure, in particular. It would also be helpful too if you could include links to Open Source projects showing how it is done. Thanks in advance.

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• Silverlight Cream for January 12, 2011 -- #1025

  - by Dave Campbell

  In this Issue: Amyo Kabir, Rob Eisenberg, Doug Rathbone, John Papa, Jeff Blankenburg(-2-), Mike Taulty, Peter Kuhn, Laurent Bugnion, Vangos Pterneas, and Senthil Kumar. Above the Fold: Silverlight: "Silverlight Popup sample" Amyo Kabir WP7: "Navigation in a #WP7 application with MVVM Light" Laurent Bugnion XNA: "XNA for Silverlight developers: Part 0 - Why should I care?" Peter Kuhn Shoutouts: Mohamed Mosallem posted a video of an Expression Blend demo he gave recently: Expression Blend Demo Rob Eisenberg posted the winners of the Caliburn.Micro Contest he was running .. and a nice bunch of swag too! Announcing the Caliburn.Micro Contest Winners! Dan Moyer is a LightSwitch enthusiast and writes Why I Believe Visual Studio LightSwitch will be a Win... good well-thought-out and written take on Lightswitch. From SilverlightCream.com: Silverlight Popup sample Amyo Kabir has a post up that is short on description but long on demo and the code is available... put this in the 'a picture is worth 1,000 words category' :) Caliburn.Micro Soup to Nuts Part 7 - All About Conventions The 7th episode of Rob Eisenberg's tutorial series on Caliburn.Micro is up. This episode about some of the conventions that you get out-of-the-box with Caliburn.Micro, what it'll do for you, and how you can modify the behavior of the convention to suit your own taste/style. Two little tips for working with Silverlight chart DateTime Axes Doug Rathbone has been working with the Toolkit Charts for WP7 and finding it difficult to get the info he needs, and now that he's worked it out... he's sharing... particularly information about DateTimeAxis. Silverlight TV 56: WCF RIA Services and Azure The first Silverlight TV of 2011 was John Papa discussing WCF RIA Services and Azure with Saurabh Plant. What I Learned In WP7 – Issue 14 As usual, Jeff Blankenburg is a couple ahead of me... his Issue 14 is about some panorama trickery... like navigating to a specific place in one, or preventing wrapping. What I Learned In WP7 – Issue 15 In Jeff Blankenburg's latest WP7 post, he's sharing some interesting insight into Trial Mode and app sales... from the standpoint of someone selling apps. Blend Bits 20–Group Into Mike Taulty has Part 20 of his Blend Bits series up. This one is demonstrating grouping, and what all can be accomplished (or not) with grouping in Blend. XNA for Silverlight developers: Part 0 - Why should I care? Peter Kuhn has the beginning of a series on WP7 and XNA up at SilverlightShow... this looks to be a good intro and way to get your head wrapped around XNA on the phone. Navigation in a #WP7 application with MVVM Light Laurent Bugnion discusses WP7 navigation via MVVM Light, resolving many of the communication/navigation complexities you can get involved in without a tool like his. Motion detection in Silverlight Vangos Pterneas has a followup postto the one on facial detection... this one is on Motion Detection in Silverlight. If you've got a webcam hooked up, you can give a demo app a dance via a link he has in the post. Adding ApplicationBar in Windows Phone 7 using Expression Blend Senthil Kumar follows up a post about using VS to add an application bar to a WP7 app with this one using Expression Blend 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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• std::map for storing static const Objects

  - by Sean M.

  I am making a game similar to Minecraft, and I am trying to fine a way to keep a map of Block objects sorted by their id. This is almost identical to the way that Minecraft does it, in that they declare a bunch of static final Block objects and initialize them, and then the constructor of each block puts a reference of that block into whatever the Java equivalent of a std::map is, so there is a central place to get ids and the Blocks with those ids. The problem is, that I am making my game in C++, and trying to do the exact same thing. In Block.h, I am declaring the Blocks like so: //Block.h public: static const Block Vacuum; static const Block Test; And in Block.cpp I am initializing them like so: //Block.cpp const Block Block::Vacuum = Block("Vacuum", 0, 0); const Block Block::Test = Block("Test", 1, 0); The block constructor looks like this: Block::Block(std::string name, uint16 id, uint8 tex) { //Check for repeat ids if (IdInUse(id)) { fprintf(stderr, "Block id %u is already in use!", (uint32)id); throw std::runtime_error("You cannot reuse block ids!"); } _id = id; //Check for repeat names if (NameInUse(name)) { fprintf(stderr, "Block name %s is already in use!", name); throw std::runtime_error("You cannot reuse block names!"); } _name = name; _tex = tex; //fprintf(stdout, "Using texture %u\n", _tex); _transparent = false; _solidity = 1.0f; idMap[id] = this; nameMap[name] = this; } And finally, the maps that I'm using to store references of Blocks in relation to their names and ids are declared as such: std::map<uint16, Block*> Block::idMap = std::map<uint16, Block*>(); //The map of block ids std::map<std::string, Block*> Block::nameMap = std::map<std::string, Block*>(); //The map of block names The problem comes when I try to get the Blocks in the maps using a method called const Block* GetBlock(uint16 id), where the last line is return idMap.at(id);. This line returns a Block with completely random values like _visibility = 0xcccc and such like that, found out through debugging. So my question is, is there something wrong with the blocks being declared as const obejcts, and then stored at pointers and accessed later on? The reason I cant store them as Block& is because that makes a copy of the Block when it is entered, so the block wouldn't have any of the attributes that could be set afterwards in the constructor of any child class, so I think I need to store them as a pointer. Any help is greatly appreciated, as I don't fully understand pointers yet. Just ask if you need to see any other parts of the code.

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• Silverlight Cream for May 27, 2010 -- #871

  - by Dave Campbell

  In this Issue: Phil Middlemiss, Max Paulousky, Jeff Wilcox, David Anson, René Schulte, Xianzhong Zhu, Jeff Handley, John Papa, Jeremy Likness, and Marlon Grech. Shoutouts: SilverLaw has a great demo at the Expression Gallery, and we're all going to look forward to the blog post explaining it: Flexible Surface Effect SilverLaw> has another use for the above in this text morphing Effect: Morphing Text Effect Matthias Shapiro contributed a chapter for a book on Visualization and it's available as a free download: Free Chapter From Beautiful Visualization Andy Beaulieu has a demo up as almost a spoiler for a future Coding4Fun app... and how cool is this: Shuffleboard: A Windows Phone 7 Sample Game From SilverlightCream.com: Separating Content and Presentation with the ContentControl Phil Middlemiss' latest is out on SilverlightShow and is all about the ContentControl and separating layout and content ... demo project source included Search Engine Optimization (SEO) for Silverlight Applications. Part 1 Max Paulousky has part one of a long series he's starting on a demo project to explain a bunch of MEF, MVVM, and WCF RIA concepts. This first one contains the overview and also discusses SEO. There is a link to the app and material in the post if you read Russian :) Updated Silverlight Unit Test Framework bits for Windows Phone and Silverlight 3 Jeff Wilcox has available updated Unit Test bits for Silverlight 3 -- read that as WP7... read the rest of the information on his post. Easily animate orientation changes for any Windows Phone application with this handy source code David Anson has some code up that you're going to want if you're programming WP7 ... just watch the video ... you'll be downloading the code just like I did :) SilverShader – Introduction to Silverlight and WPF Pixel Shaders René Schulte has a post up at Coding4Fun about PixelShaders... how to write them and an application that uses them... this is a great long tutorial... a must read. Developing Freecell Game Using Silverlight 3 Part 2 Xianzhong Zhu has part 2 of his FreeCell game development posted ... lots of detailed descriptions and code, plus all the code of course! Async Validation with RIA Services Jeff Handley has a post up that is sort of a follow-on to a year-old post on async validation with RIA services and DataForm and how it's all much easier now in SL4. Learning Blend with .toolbox (Silverlight TV #29) John Papa and Arturo Toledo discuss .toolbox in Silverlight TV #29 -- have you made yourself an avatar yet? ... well go get on-board with this great learning tool! Silverlight Out of Browser Dynamic Modules in Offline Mode OOB isn't difficult, dynamic modules can become a bit more, but what if you're OOB... ok what if you're OOB and offline? ... Jeremy Likness has a possible solution for this with an OfflineCatalog. MEFedMVVM v1.0 Explained Marlon Grech has a great into to MEFedMVVM in this post. If you're trying to get your head around MEF and MVVM in either WPF or Silverlight, here's a good starting point. 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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• A tiny Utility to recycle an IIS Application Pool

  - by Rick Strahl

  In the last few weeks I've annoyingly been having problems with an area on my Web site. It's basically ancient articles that are using ASP classic pages and for reasons unknown ASP classic locks up on these pages frequently. It's not an individual page, but ALL ASP classic pages lock up. Ah yes, gotta old tech gone bad. It's not super critical since the content is really old, but still a hassle since it's linked content that still gets quite a bit of traffic. When it happens all ASP classic in that AppPool dies. I've been having a hard time tracking this one down - I suspect an errant COM object I have a Web Monitor running on the server that's checking for failures and while the monitor can detect the failures when the timeouts occur, I didn't have a good way to just restart that particular application pool. I started putzing around with PowerShell, but - as so often seems the case - I can never get the PowerShell syntax right - I just don't use it enough and have to dig out cheat sheets etc. In any case, after about 20 minutes of that I decided to just create a small .NET Console Application that does the trick instead, and in a few minutes I had this:using System; using System.Collections.Generic; using System.Text; using System.DirectoryServices; namespace RecycleApplicationPool { class Program { static void Main(string[] args) { string appPoolName = "DefaultAppPool"; string machineName = "LOCALHOST"; if (args.Length > 0) appPoolName = args[0]; if (args.Length > 1) machineName = args[1]; string error = null; DirectoryEntry root = null; try { Console.WriteLine("Restarting Application Pool " + appPoolName + " on " + machineName + "..."); root = new DirectoryEntry("IIS://" + machineName + "/W3SVC/AppPools/" +appPoolName); Console.WriteLine(root.InvokeGet("Name")); root.Invoke("Recycle"); Console.WriteLine("Application Pool recycling complete..."); } catch(Exception ex) { error = "Error: Unable to access AppPool: " + ex.Message; } if ( !string.IsNullOrEmpty(error) ) { Console.WriteLine(error); return; } } } } To run in you basically provide the name of the ApplicationPool and optionally a machine name if it's not on the local box. RecyleApplicationPool.exe "WestWindArticles" And off it goes. What's nice about AppPool recycling versus doing a full IISRESET is that it only affects the AppPool, and more importantly AppPool recycles happen in a staggered fashion - the existing instance isn't shut down immediately until requests finish while a new instance is fired up to handle new requests. So, now I can easily plug this Executable into my West Wind Web Monitor as an action to take when the site is not responding or timing out which is a big improvement than hanging for an unspecified amount of time. I'm posting this fairly trivial bit of code just in case somebody (maybe myself a few months down the road) is searching for ApplicationPool recyling code. It's clearly trivial, but I've written batch files for this a bunch of times before and actually having a small utility around without having to worry whether Powershell is installed and configured right is actually an improvement. Next time I think about using PowerShell remind me that it's just easier to just build a small .NET Console app, 'k? :-) Resources Download Executable and VS Project© Rick Strahl, West Wind Technologies, 2005-2012Posted in IIS7  .NET  Windows   Tweet !function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); (function() { var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true; po.src = 'https://apis.google.com/js/plusone.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s); })();

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• T-SQL in Chicago – the LobsterPot teams with DataEducation

  - by Rob Farley

  In May, I’ll be in the US. I have board meetings for PASS at the SQLRally event in Dallas, and then I’m going to be spending a bit of time in Chicago. The big news is that while I’m in Chicago (May 14-16), I’m going to teach my “Advanced T-SQL Querying and Reporting: Building Effectiveness” course. This is a course that I’ve been teaching since the 2005 days, and have modified over time for 2008 and 2012. It’s very much my most popular course, and I love teaching it. Let me tell you why. For years, I wrote queries and thought I was good at it. I was a developer. I’d written a lot of C (and other, more fun languages like Prolog and Lisp) at university, and then got into the ‘real world’ and coded in VB, PL/SQL, and so on through to C#, and saw SQL (whichever database system it was) as just a way of getting the data back. I could write a query to return just about whatever data I wanted, and that was good. I was better at it than the people around me, and that helped. (It didn’t help my progression into management, then it just became a frustration, but for the most part, it was good to know that I was good at this particular thing.) But then I discovered the other side of querying – the execution plan. I started to learn about the translation from what I’d written into the plan, and this impacted my query-writing significantly. I look back at the queries I wrote before I understood this, and shudder. I wrote queries that were correct, but often a long way from effective. I’d done query tuning, but had largely done it without considering the plan, just inferring what indexes would help. This is not a performance-tuning course. It’s focused on the T-SQL that you read and write. But performance is a significant and recurring theme. Effective T-SQL has to be about performance – it’s the biggest way that a query becomes effective. There are other aspects too though – such as using constructs better. For example – I can write code that modifies data nicely, but if I haven’t learned about the MERGE statement and the way that it can impact things, I’m missing a few tricks. If you’re going to do this course, a good place to be is the situation I was in a few years before I wrote this course. You’re probably comfortable with writing T-SQL queries. You know how to make a SELECT statement do what you need it to, but feel there has to be a better way. You can write JOINs easily, and understand how to use LEFT JOIN to make sure you don’t filter out rows from the first table, but you’re coding blind. The first module I cover is on Query Execution. Take a look at the Course Outline at Data Education’s website. The first part of the first module is on the components of a SELECT statement (where I make you think harder about GROUP BY than you probably have before), but then we jump straight into Execution Plans. Some stuff on indexes is in there too, as is simplification and SARGability. Some of this is stuff that you may have heard me present on at conferences, but here you have me for three days straight. I’m sure you can imagine that we revisit these topics throughout the rest of the course as well, and you’d be right. In the second and third modules we look at a bunch of other aspects, including some of the T-SQL constructs that lots of people don’t know, and various other things that can help your T-SQL be, well, more effective. I’ve had quite a lot of people do this course and be itching to get back to work even on the first day. That’s not a comment about the jokes I tell, but because people want to look at the queries they run. LobsterPot Solutions is thrilled to be partnering with Data Education to bring this training to Chicago. Visit their website to register for the course. @rob_farley

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• Windows Phone 8, possible tablets and what the latest update might mean

  - by Roger Hart

  Microsoft have just announced an update to Windows Phone 8. As one of the five, maybe six people who actually bought a WP8 handset I found this interesting. Then I read the blog post about it, and rushed off to write somewhat less than a thousand words about a single picture. The blog post announces an extra column of tiles on the start screen, and support for higher resolutions. If we ignore all the usual flummery about how this will make your life better, that (and the rotation lock) sounds a little like stage setting for tablets. Looking at the preview screenshot, I started to wonder. What it’s called Phablet_5F00_StartScreenProductivity_5F00_01_5F00_072A1240.jpg Pretty conclusive. If you can brand something a “phablet” and sleep at night you’re made of sterner stuff than I am, but that’s beside the point. It’s explicit in the post that Microsoft are expecting a broader range of form factors for WP8, but they stop short of quite calling out tablet size. The extra columns and resolution definitely back that up, so why stop at a 6 inch “phablet”? Sadly, the string of numbers there don’t really look like a Lumia model number – that would be a bit tendentious even for a speculative blog post about a single screenshot. “Productivity” is interesting too. I get into this a bit more below, but this is a pretty clear pitch for a business device. What it looks like Something that would look quite decent on a 7 inch screen, but something a bit too vertical to go toe-to-toe with the Surface. Certainly, it would look a lot better on a large-factor phone than any of the current models. Those tiles are going to get cramped and a bit ugly if the handsets aren’t getting bigger. What’s on it You have a bunch of missed calls, you rarely text, use a stocks app, and your budget spreadsheet and meeting notes are a thumb-reach away. Outlook is your main form of email. You care enough about LinkedIn to not only install its app but give it a huge live tile. There’s no beating about the bush here, the implicit persona is a corporate exec. With Nokia in the bag and Blackberry pushing daisies, that may not be a stupid play. There’s almost certainly a niche there if they can parlay their corporate credentials into filling it before BYOD (which functionally means an iPhone) reaches the late adopters. The really quite slick WP8 Office implementation ought to help here. This is the face they’ve chosen to present, the cultural milieu they’re normalizing for Windows Phone. It’s an iPhone for Serious Business Grown-ups. Could work, I guess. Does it mean anything? Is the latest WP8 update a sign that we can expect to see tablets running Windows Phone rather than WinRT? Well, WinRT tablets haven’t exactly taken off but I’m not quite going to make a leap like that just from a file name and a column of icons. I feel pretty safe, however, conjecturing that Microsoft would like to squeeze a WP8 “phablet” into the palm of every exec who’s ever grumbled about their Blackberry, and this release might get them a bit closer. If it works well incrementing up to larger devices, then that could be a fair hedge against WinRt crashing and burning any harder in the marketplace.

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• DAC pack up all your troubles

  - by Tony Davis

  Visual Studio 2010, or perhaps its apparently-forthcoming sister, "SQL Studio", is being geared up to become the natural way for developers to create databases. Central to this drive is the introduction of 'data-tier application components', or DACs. Applications are developed as normal but when it comes to deployment, instead of supplying the DBA with a bunch of scripts to create the required database objects, the developer creates a single DAC Package ("DAC Pack"); a zipped XML file containing all the database objects needed by the application, along with versioning information, policies for deployment, and so on. It's an intriguing prospect. Developers can work on their development database using their existing tools and source control, and then package up the changes into a single DACPAC for deployment and management. DBAs get an "application level view" of how their instances are being used and the ability to collectively, rather than individually, manage the objects. The DBA needing to manage a large number of relatively small databases can use "DAC snapshots" to get a quick overview of what has changed across all the databases they manage. The reason that DAC packs haven't caused more excitement is that they can only be pushed to SQL Server 2008 R2, and they must be developed or inspected using Visual Studio 2010. Furthermore, what we see right now in VS2010 is more of a 'work-in-progress' or 'vision of the future', with serious shortcomings and restrictions that render it unsuitable for anything but small 'non-critical' departmental databases. The first problem is that DAC packs support a limited set of schema objects (corresponding closely to the features available on 'Azure'). This means that Service Broker queues, CLR Objects, and perhaps most critically security (permissions, certificates etc.), are off-limits. Applications that require these objects will need to add them via a post-deployment TSQL script, rather defeating the whole idea. More worrying still is the process for altering a database with a DAC pack. The grand 'collective' philosophy, whereby a single XML file can be used for deploying and managing builds and changes, extends, unfortunately, to database upgrades. Any change to a database object will result in the creation of a new database, copying the data from the old version, nuking the previous one, and then renaming the new one. Simple eh? The problem is that even something as trivial as adding a comment to a stored procedure in a 5GB database will require the server to find at least twice as much space, as well sufficient elbow-room in the transaction log for copying the largest table. Of course, you'll need to take the database offline for the full course of the deployment, which is likely to take a long time if there is a lot of data. This upgrade/rename process breaks the log chain, makes any subsequent full restore operation highly complicated, and will also break log shipping. As with any grand vision, the devil is always in the detail. It's hard to fathom why Microsoft hasn't used a SQL Compare-style approach to the upgrade process, altering a database with a change script, and this will surely be adopted in the near future. Something had to be in place for VS2010, but right now DAC packs only make sense for Azure. For this, they're cute, but hardly compelling. Nevertheless, DBAs would do well to get familiar with VS 2010 and DAC packs. Like it or not, they're both coming. Cheers, Tony.

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• Python Coding standards vs. productivity

  - by Shroatmeister

  I work for a large humanitarian organisation, on a project building software that could help save lives in emergencies by speeding up the distribution of food. Many NGOs desperately need our software and we are weeks behind schedule. One thing that worries me in this project is what I think is an excessive focus on coding standards. We write in python/django and use a version of PEP0008, with various modifications e.g. line lengths can go up to 160 chars and all lines should go that long if possible, no blank lines between imports, line wrapping rules that apply only to certain kinds of classes, lots of templates that we must use, even if they aren't the best way to solve a problem etc. etc. One core dev spent a week rewriting a major part of the system to meet the then new coding standards, throwing away several suites of tests in the process, as the rewrite meant they were 'invalid'. We spent two weeks rewriting all the functionality that was lost, and fixing bugs. He is the lead dev and his word carries weight, so he has convinced the project manager that these standards are necessary. The junior devs do as they are told. I sense that the project manager has a strong feeling of cognitive dissonance about all this but nevertheless agrees with it vehemently as he feels unsure what else to do. Today I got in serious trouble because I had forgotten to put some spaces after commas in a keyword argument. I was literally shouted at by two other devs and the project manager during a Skype call. Personally I think coding standards are important but also think that we are wasting a lot of time obsessing with them, and when I verbalized this it provoked rage. I'm seen as a troublemaker in the team, a team that is looking for scapegoats for its failings. Since the introduction of the coding standards, the team's productivity has measurably plummeted, however this only reinforces the obsession, i.e. the lead dev simply blames our non-adherence to standards for the lack of progress. He believes that we can't read each other's code if we don't adhere to the conventions. This is starting to turn sticky. Now I am trying to modify various scripts, autopep8, pep8ify and PythonTidy to try to match the conventions. We also run pep8 against source code but there are so many implicit amendments to our standard that it's hard to track them all. The lead dev simple picks faults that the pep8 script doesn't pick up and shouts at us in the next stand-up meeting. Every week there are new additions to the coding standards that force us to rewrite existing, working, tested code. Thank heavens we still have tests, (I reverted some commits and fixed a bunch of the ones he removed). All the while there is increasing pressure to meet the deadline. I believe a fundamental issue is that the lead dev and another core dev refuse to trust other developers to do their job. But how to deal with that? We can't do our job because we are too busy rewriting everything. I've never encountered this dynamic in a software engineering team. Am I wrong to question their adherence to coding standards? Has anyone else experienced a similar situation and how have they dealt with it successfully? (I'm not looking for a discussion just actual solutions people have found)

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• maintaining a growing, diverse codebase with continuous integration

  - by Nate

  I am in need of some help with philosophy and design of a continuous integration setup. Our current CI setup uses buildbot. When I started out designing it, I inherited (well, not strictly, as I was involved in its design a year earlier) a bespoke CI builder that was tailored to run the entire build at once, overnight. After a while, we decided that this was insufficient, and started exploring different CI frameworks, eventually choosing buildbot. One of my goals in transitioning to buildbot (besides getting to enjoy all the whiz-bang extras) was to overcome some of the inadequacies of our bespoke nightly builder. Humor me for a moment, and let me explain what I have inherited. The codebase for my company is almost 150 unique c++ Windows applications, each of which has dependencies on one or more of a dozen internal libraries (and many on 3rd party libraries as well). Some of these libraries are interdependent, and have depending applications that (while they have nothing to do with each other) have to be built with the same build of that library. Half of these applications and libraries are considered "legacy" and unportable, and must be built with several distinct configurations of the IBM compiler (for which I have written unique subclasses of Compile), and the other half are built with visual studio. The code for each compiler is stored in two separate Visual SourceSafe repositories (which I am simply handling using a bunch of ShellCommands, as there is no support for VSS). Our original nightly builder simply took down the source for everything, and built stuff in a certain order. There was no way to build only a single application, or pick a revision, or to group things. It would launched virtual machines to build a number of the applications. It wasn't very robust, it wasn't distributable. It wasn't terribly extensible. I wanted to be able to overcame all of these limitations in buildbot. The way I did this originally was to create entries for each of the applications we wanted to build (all 150ish of them), then create triggered schedulers that could build various applications as groups, and then subsume those groups under an overall nightly build scheduler. These could run on dedicated slaves (no more virtual machine chicanery), and if I wanted I could simply add new slaves. Now, if we want to do a full build out of schedule, it's one click, but we can also build just one application should we so desire. There are four weaknesses of this approach, however. One is our source tree's complex web of dependencies. In order to simplify config maintenace, all builders are generated from a large dictionary. The dependencies are retrieved and built in a not-terribly robust fashion (namely, keying off of certain things in my build-target dictionary). The second is that each build has between 15 and 21 build steps, which is hard to browse and look at in the web interface, and since there are around 150 columns, takes forever to load (think from 30 seconds to multiple minutes). Thirdly, we no longer have autodiscovery of build targets (although, as much as one of my coworkers harps on me about this, I don't see what it got us in the first place). Finally, aformentioned coworker likes to constantly bring up the fact that we can no longer perform a full build on our local machine (though I never saw what that got us, either, considering that it took three times as long as the distributed build; I think he is just paranoically phobic of ever breaking the build). Now, moving to new development, we are starting to use g++ and subversion (not porting the old repository, mind you - just for the new stuff). Also, we are starting to do more unit testing ("more" might give the wrong picture... it's more like any), and integration testing (using python). I'm having a hard time figuring out how to fit these into my existing configuration. So, where have I gone wrong philosophically here? How can I best proceed forward (with buildbot - it's the only piece of the puzzle I have license to work on) so that my configuration is actually maintainable? How do I address some of my design's weaknesses? What really works in terms of CI strategies for large, (possibly over-)complex codebases?

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• Ubuntu 13.04 installation issues: unable to handle kernel paging request error

  - by user173944

  I wish I could say that I’ve done more for the Linux community as of recent but I am very VERY new to all of this and I feel very much in over my head. I figured I would install Ubuntu. on my computer and then I would learn and contribute to the community simultaneously. I will try to be as detailed as I can, please ask questions if you need clarification. I installed Ubuntu. 13.04 (64-bit) on my dell Inspiron 1501. This has an AMD Turion 64-bit TL-56 1.8 Ghz mobile processor. It is a dual core. It has an ATI Radeon Xpress 1150 chipset in it as well. As of right now I only have a total of 2Ghz ram, however I was planning on upgrading that in the near future so I opted for the 64-bit Ubuntu. 13.04. I first tried the live CD and everything seemed to be functioning correctly other than the wireless (but that's not the issue at hand, there are plenty of guides on the internet on how to get that functioning). The internet worked just fine when it was plugged in so no issues there. However, once I went from that to installing 13.04 (just 13.04, no dual partitioning... I want this computer to run strictly Ubuntu.) it did not work. It took me into a shell that I could not type anything into. In this shell it said Bug: unable to handle kernel paging and then it called a bunch of traces and froze up. I had to hard reset the laptop. I tried the boot-repair program multiple times with many different settings and typically after starting up the laptop would say something along the lines of recursive errors. will attempt to fix and then it would attempt to fix a couple of things, and then the computer would freeze up after the text said end trace... so I had to hard reset it again. I'm not an impatient person either, when I say it would freeze up it would be for a period of at least 15 minutes each time before I decided to hard reset. I attempted to install 12.10 on it instead and I got the same exact message, and when I ran boot-repair it did the same exact thing as before. I am currently in the process of running memtest64+ on the computer's memory, though I really don't believe that, nor any of the hardware is at fault due to the fact that it was still running windows vista perfectly when I had decided to switch over to Ubuntu. so far the memtest has came back just fine without any errors, but I’ve only been running it for approximately an hour. So this is the situation I’m in. I did notice when I was using the live disk that the video driver needed updated so I performed that, though I’m fairly certain that has nothing to do with this. I have also attempted (though I’m not certain that my attempt was successful in accomplishing what I had planned) to manually edit the grub settings by making acpi=0 along top of adding nomodeset to the boot commands. Like I said, I’m not sure I did that correctly though, but I’m fairly certain I did. If anyone needs any more information I will be more than happy to provide it, I will post back once I get the full results of the memtest. I very much appreciate any ideas anyone else has, I’ve been at this for a few days to no avail... thank you

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• Tuning Red Gate: #1 of Many

  - by Grant Fritchey

  Everyone runs into performance issues at some point. Same thing goes for Red Gate software. Some of our internal systems were running into some serious bottlenecks. It just so happens that we have this nice little SQL Server monitoring tool. What if I were to, oh, I don't know, use the monitoring tool to identify the bottlenecks, figure out the causes and then apply a fix (where possible) and then start the whole thing all over again? Just a crazy thought. OK, I was asked to. This is my first time looking through these servers, so here's how I'd go about using SQL Monitor to get a quick health check, sort of like checking the vitals on a patient. First time opening up our internal SQL Monitor instance and I was greeted with this: Oh my. Maybe I need to get our internal guys to read my blog. Anyway, I know that there are two servers where most of the load is. I'll drill down on the first. I'm selecting the server, not the instance, by clicking on the server name. That opens up the Global Overview page for the server. The information here much more applicable to the "oh my gosh, I have a problem now" type of monitoring. But, looking at this, I am seeing something immediately. There are four(4) drives on the system. The C:\ has an average read time of 16.9ms, more than double the others. Is that a problem? Not sure, but it's something I'll look at. It's write time is higher too. I'll keep drilling down, first, to the unclosed alerts on the server. Now things get interesting. SQL Monitor has a number of different types of alerts, some related to error states, others to service status, and then some related to performance. Guess what I'm seeing a bunch of right here: Long running queries and long job durations. If you check the dates, they're all recent, within the last 24 hours. If they had just been old, uncleared alerts, I wouldn't be that concerned. But with all these, all performance related, and all in the last 24 hours, yeah, I'm concerned. At this point, I could just start responding to the Alerts. If I click on one of the the Long-running query alerts, I'll get all kinds of cool data that can help me determine why the query ran long. But, I'm not in a reactive mode here yet. I'm still gathering data, trying to understand how the server works. I have the information that we're generating a lot of performance alerts, let's sock that away for the moment. Instead, I'm going to back up and look at the Global Overview for the SQL Instance. It shows all the databases on the server and their status. Then it shows a number of basic metrics about the SQL Server instance, again for that "what's happening now" view or things. Then, down at the bottom, there is the Top 10 expensive queries list: This is great stuff. And no, not because I can see the top queries for the last 5 minutes, but because I can adjust that out 3 days. Now I can see where some serious pain is occurring over the last few days. Databases have been blocked out to protect the guilty. That's it for the moment. I have enough knowledge of what's going on in the system that I can start to try to figure out why the system is running slowly. But, I want to look a little more at some historical data, to understand better how this server is behaving. More next time.

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• forEach and Facelets - a bugfarm just waiting for harvest

  - by Duncan Mills

  An issue that I've encountered before and saw again today seems worthy of a little write-up. It's all to do with a subtle yet highly important difference in behaviour between JSF 2 running with JSP and running on Facelets (.jsf pages). The incident I saw today can be seen as a report on the ADF EMG bugzilla (Issue 53) and in a blog posting by Ulrich Gerkmann-Bartels who reported the issue to the EMG. Ulrich's issue nicely shows how tricky this particular gochya can be. On the surface, the problem is squarely the fault of MDS but underneath MDS is, in fact, innocent. To summarize the problem in a simpler testcase than Ulrich's example, here's a simple fragment of code: <af:forEach var="item" items="#{itemList.items}"> <af:commandLink id="cl1" text="#{item.label}" action="#{item.doAction}"  partialSubmit="true"/> </af:forEach> Looks innocent enough right? We see a bunch of links printed out, great. The issue here though is the id attribute. Logically you can kind of see the problem. The forEach loop is creating (presumably) multiple instances of the commandLink, but only one id is specified - cl1. We know that IDs have to be unique within a JSF component tree, so that must be a bad thing?  The problem is that JSF under JSP implements some hacks when the component tree is generated to transparently fix this problem for you. Behind the scenes it ensures that each instance really does have a unique id. Really nice of it to do so, thank you very much. However, (you could see this coming), the same is not true when running with Facelets  (this is under 11.1.2.n)  in that case, what you put for the id is what you get, and JSF does not mess around in the background for you. So you end up with a component tree that contains duplicate ids which are only created at runtime.  So subtle chaos can ensue.  The symptoms are wide and varied, from something pretty obscure such as the combination Ulrich uncovered, to something as frustrating as your ActionListener just not being triggered. And yes I've wasted hours on just such an issue.  The Solution  Once you're aware of this one it's really simple to fix it, there are two options: Remove the id attribute on components that will cause some kind of submission within the forEach loop altogether and let JSF do the right thing in generating them. Then you'll be assured of uniqueness. Use the var attribute of the loop to generate a unique id for each child instance.  for example in the above case: <af:commandLink id="cl1_#{item.index}" ... />.  So one to watch out for in your upgrades to JSF 2 and one perhaps, for your coding standards today to prepare you for. For completeness, here's the reference to the underlying JSF issue that's at the heart of this: JAVASERVERFACES-1527

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