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• Silverlight Cream for March 28, 2010 -- #823

  - by Dave Campbell

  In this Issue: Michael Washington, Andy Beaulieu, Bill Reiss, jocelyn, Shawn Wildermuth, Cameron Albert, Shawn Oster, Alex Yakhnin, ondrejsv, Giorgetti Alessandro, Jeff Handley, SilverLaw, deepm, and Kyle McClellan. Shoutouts: If I've listed this before, it's worth another... Introduction to Prototyping with SketchFlow (twelve video series) and on the same page is Creating a Beehive Game with Behaviors in Blend 3 (ten video series) Shawn Oster announced his Slides + Code + Video from ‘An Introduction to Developing Applications for Microsoft Silverlight’ from MIX10 Tim Heuer announced earlier this week: Silverlight Client for Facebook updated for Silverlight 4 RC Nikhil Kothari announced the availability of his MIX10 Talk - Slides and Code András Velvárt backed up his great MIX09 effort with MIX10.Zoomery.com... everything in one DZ effort... thanks András! Andy Beaulieu posted his material for his Code Camp 13 in Waltham: Windows Phone: Silverlight for Casual Games From SilverlightCream.com: Silverlight MVVM - The Revolution Has Begun Michael Washington did an awesome tutorial on MVVM and Silverlight creating a simple Silverlight File Manager. The post has a link to the tutorial at CodeProject... great tutorial. Windows Phone 7 + Silverlight Performance Andy Beaulieu has a post up we should all bookmark... getting a handle on the graphics performance of our app on WP7. Great examples, and external links. Space Rocks game step 6: Keyboard handling Bill Reiss has a post up about keyboard input for the WP7 game he's building ... this is Episode 6 ... you're working along with him, right? Panoramic Navigation on Windows Phone 7 with No Code! jocelyn at InnovativeSingapore (I found this by way of Shawn's post), has a Panoramic Navigation template out there for WP7 for all of us to grab... great post about it too. My First WP7 Application Shawn Wildermuth has been playing with WP7 development and has his XBOX Game library app up on the emulator... all with source of course Silverlight and Windows Phone 7 Game Cameron Albert built a web-based game called 'Shape Attack' and also did it for WP7 to compare the performance... check it out for yourself, but hey, it's game source for the phone... cool :) Changing the Onscreen Keyboard layout in Silverlight for Windows Phone using InputScope Shawn Oster has a cool post on changing the keyboard on WP7 to go along with what you're expecting the user to type... how cool is that?? Deep Zoom on WP7 Check out the quick work Alex Yakhnin made of putting DeepZoom on WP7... all source included. How to: Create a sketchy Siverlight GroupBox in Blend/SketchFlow ondrejsv has the xaml up to take Tim Greenfield's GroupBox control and insert it into SketchFlow. Silverlight / Castle Windsor – implementing a simple logging framework Giorgetti Alessandro posted about CastleWindsor for Silverlight, and a logging system inherited from LevelFilteredLogger in the absence of Log4Net. DomainDataSource in a ViewModel Jeff Handley responds to a common forum post about using DomainDataSource in a ViewModel. Read his comments on AutoLoad and ElementName Bindins. Digital Jugendstil TextEffect (Art Nouveau) - Silverlight 3 SilverLaw has a cool TagCloud demo and a UserControl he calls Art Nouveau up at the Expression Gallery... not for a business app, I don't think :) Configuring your DomainService for a Windows Phone 7 application deepm discusses RIA Services for WP7 and how to enable a WP7 app to communicate with a DomainService. Writing a Custom Filter or Parameter for DomainDataSource Kyle McClellan by way of Jeff Handley's blog, is discussing how to leverage the custom parameter types you defined in the previous version of RIA Services. 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 December 12, 2010 -- #1008

  - by Dave Campbell

  In this Issue: Michael Washington, Samuel Jack, Alfred Astort(-2-), Nokola(-2-), Avi Pilosof, Chris Klug, Pete Brown, Laurent Bugnion(-2-), and Jaime Rodriguez(-2-, -3-). Above the Fold: Silverlight: "Sharing resources and styles between projects in Silverlight" Chris Klug WP7: "Windows Phone Application Performance at Silverlight Firestarter" Jaime Rodriguez Training: "Silverlight View Model (MVVM) - A Play In One Act" Michael Washington Shoutouts: Koen Zwikstra announced the availability of the first Silverlight Spy 4 Preview 1 Gavin Wignall announced the Launch of Festive game built with Silverlight 4, hosted on Azure ... free to play. From SilverlightCream.com: Silverlight View Model (MVVM) - A Play In One Act Michael Washington has an interesting take on writing a blog post with this 'play' version of Silverlight View Models and Expression Blend with a heaping dose of Behaviors added in for flavoring. Build a Windows Phone Game in 3 days – Day 1 Samuel Jack is attempting to build a WP7 game in 3 days including downloading the tools and an XNA book... interesting to see where he's headed wth this venture. 4 of 10 - Make sure your finger can hit the target and text is legible Continuing with a series of tips from the folks reviewing apps for the marketplace via Alfred Astort is this number 4 -- touch target size and legible text. 5 of 10 - Give feedback on touch and progress within your UI Alfred Astort's number 5 is also up, and continues the touch discussion with this tip about giving the user feedback on their touch. Fantasia Painter Released for Windows Phone 7 + Tips Nokola took the release of his Fantasia Painter on WP& as an opportunity not only to blog about the fact that we can go buy it, but has a blog full of hints and tips that he gathered while working on it. Games for Windows Phone 7 Resources: Reducing Load Times, RPG Kit; Other Nokola also blogged about the release of the new games education pack, and gives up the cursor he uses in his videos after being asked... The simplest way to do design-time ViewModels with MVVM and Blend. Avi Pilosof attacks the design-time ViewModel issue in Blend with a 'no code' solution. Sharing resources and styles between projects in Silverlight Chris Klug is talking about sharing resources and styles across a large Silverlight project... near and dear to my heart at this moment. Dynamically Generating Controls in WPF and Silverlight Pete Brown has a post up that's generated some interest... creating controls at runtime... and he's demonstrating several different ways for both Silverlight and WPF #twitter for Windows Phone 7 protips (#wp7) Laurent Bugnion was posting these great tips for Twitter for WP7 and rolled all 16 of them up into a blog post... check them and the app out... Increasing touch surface (#wp7dev) Laurent Bugnion's most current post should be of great interest to WP7 devs... providing more touch surface for your user's fat fingers, err, I mean their fat fingerings :) ... great information and samples ... and interesting it is a fail point as listed by Alfred Astort above. Windows Phone Application Performance at Silverlight Firestarter This material from Jaime Rodriguez actually hit prior to his Firestarter presentation, but should be required reading for anyone doing a WP7 app... great Performance tips from the trenches... slide deck, cheat-sheet, and code. UpdateSourceTrigger on Windows Phone data bindings Another post from Jaime Rodriguez actually went through a couple revisions already.. how about a WP7 TextBox that fires notifications to the ViewModel when the text changes? ... would you like a behavior with that? Details on the Push Notification app limits Jaime Rodriguez has yet another required reading post up on Push Notification limits ... what it really entails and how you can be a good WP7 citizen by the way you program your app. 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 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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• Silverlight Cream for May 11, 2010 -- #859

  - by Dave Campbell

  In this All Submittal Issue: Colin Eberhardt, Ken Johnson, Alan Beasley, Pencho Popadiyn, Phil Middlemiss, Khawar(-2-), Levente Mihály, Alex van Beek, Bart Czernicki, Michael Washington, and Mark Monster. Shoutout: Not Silverlight necessarily, but definitely VS2010, read what Brett Balmer has to say In Defense of Portrait Mode From SilverlightCream.com: Silverlight MultiBinding solution for Silverlight 4 Colin Eberhardt updated his Silverlight Multibinding solution to Silverlight 4. Great article with explanatory graphics, and links to the code... congrats on the use in the FaceBook Client too! Spirograph Shapes: WPF Bezier shapes from math formulae Wow... I haven't seen this much math since my Master's Thesis! ... Check out all the shapes Ken Johnson has built... don't let the math scare you... just use it :) Busy Dizzy Bee-sley Spirographic Animation in Expression Blend and Silverlight This is just fun... I saw Michael Washington playing with this yesterday at the Arizona Day of .NET but didn't have a chance to ask what it was.. Alan Beasley had a good time building this, and is sharing a very detailed tutorial with us. ModalDialogs, IEditableObject and MVVM in Silverlight 4 Pencho Popadiyn said the 'M' word over at SilverlightShow... actually the 'MVVM' word :) ... he's discussing Modal dialogs with no code in the View ... check out how he did it. A Chrome and Glass Theme - Part 6 Phil Middlemiss is up to episode 6 in his Theme-building tutorial... this time out, he's giving the TabControl and TabItem new clothes ... specifically discussing what to change and what to allow to inherit ... good stuff! Silverlight 4 Fonts gotcha Check out Khawar's ATM Machine demo -- there's a link on the page for this post... he had an issue with fonts, ratted it out, and explains it for all of us... thanks Khawar Demystifying Silverlight Obfuscation Khawar also has a good post up on Obfuscating your Silverlight... definitely showing that it's not all that difficult to do. geoGallery, a WinPhone7 sample OK this is interesting... using the geoLocation feature of WP7, Levente Mihály hits Google Picasa to find pictures... good write-up and all the code. Silverlight 4: Digitally signing a XAP with Visual Studio 2010 Alex van Beek has a nice tutorial on Signing your XAP file using Visual Studio 2010... of course you may want to visit Tim Heuer's blog (search at SC) to find the two good deals on certificates that are still in play. Creating Key Performance Indicators (KPIs) in Expression Blend 4 for Business Intelligence applications In an interesting post, Bart Czernicki describes using the shape assets in Blend 4 to produce a KPI display in Silverlight or WPF. A discussion of the shape's evolution for KPI is included as well as some alternate shape uses. A DotNetNuke Silverlight 4 Drag and Drop File Manager Michael Washington has blogged about his Drag and Drop File Manager using the View Model Style pattern. This is covered in two CodeProject articles listed in the post. The design work was done by Alan Beasely and links to his work is there as well as covered in other SC posts. How to select a ListItem on Hover Mark Monster had a Use Case for Selecting a ListBox entry by hovering ... but he did it with a Behavior and for a ListBox and PathListBox and it works with DataBinding... 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 December 07, 2010 -- #1004

  - by Dave Campbell

  In this Issue: András Velvárt, Kunal Chowdhury(-2-), AvraShow, Gill Cleeren, Ian T. Lackey, Richard Waddell, Joe McBride, Michael Crump, Xpert360, keyboardP, and Pete Vickers(-2-). Above the Fold: Silverlight: "Grouping Records in Silverlight DataGrid using PagedCollectionView" Kunal Chowdhury WP7: "Phone 7 Back Button and the ListPicker control" Ian T. Lackey Shoutouts: Colin Eberhardt has some Silverlight 5 Adoption Predictions you may want to check out. Michael Crump has a post up showing lots of the goodness of Silverlight 5 from the Firestarter... screenshots, code snippets, etc: Silverlight 5 – What’s New? (Including Screenshots & Code Snippets) Kunal Chowdhury has a pretty complete Silverlight 5 feature set from the Firestarter and an embedded copy of Scott Guthrie's kenote running on the page: New Features Announced for Silverlight 5 Beta From SilverlightCream.com: Just how productive is WP7 development compared to iOS, Android and mobile Web? András Velvárt blogged about a contest he took part in to build a WP7 app in 1-1/2 hours without any prior knowledge of it's funtion. He and his team-mate were pitted against other teams on Android, IOS, and mobile Web... guess who got (almost) their entire app running? ... just too cool Andras! ... Grouping Records in Silverlight DataGrid using PagedCollectionView Kunal Chowdhury has a couple good posts up, this first one is on using the PagedCollectionView to group the records in a DataGrid... code included. Filtering Records in Silverlight DataGrid using PagedCollectionView Kunal Chowdhury then continues with another post on the PagedCollectionView only this time is showing how to do some filtering. DeepZoom Tips and Techniques AvraShow has a post up discussing using DeepZoom to explore, in his case, a Printed Circuit Board, with information about how he proceeded in doing that, and some tips and techniques along the way. The validation story in Silverlight (Part 2) Gill Cleeren has Part 2 of his Silverlight Validation series up at SilverlightShow. This post gets into IDataErrorInfo and INotifyDataErrorInfo. Lots of code and the example is available for download. Phone 7 Back Button and the ListPicker control Ian T. Lackey has a post up about the WP7 backbutton and what can get a failure from the Marketplace in that area, and how that applies to the ListPicker as well. Very Simple Example of ICommand CanExecute Method and CanExecuteChanged Event Richard Waddell has a nice detailed tutorial on ICommand and dealing with CanExecute... lots of Blend love in this post. Providing an Alternating Background Color for an ItemsControl Joe McBride has a post up discussing putting an alternating background color on an ItemsControl... you know, how you do on a grid... interesting idea, and all the code... Pimp my Silverlight Firestarter Michael Crump has a great Firestarter post up ... where and how to get the videos, the labs... a good Firestarter resource for sure. Adventures with PivotViewer Part 7: Slider control Xpert360 has part 7 of the PivotViewer series they're doing up. This time they're demonstrating taking programmatic control of the Zoom slider. Creating Transparent Lockscreen Wallpapers for WP7 I don't know keyboardP's name, but he's got a cool post up about getting an image up for the WP7 lock screen that has transparent regions on it... pretty cool actually. Windows Phone 7 Linq to XML 'strangeness' Pete Vickers has a post up describing a problem he found with Linq to XML on WP7. He even has a demo app that has the problem, and the fix... and it's all downloadable. Windows Phone 7 multi-line radio buttons Pete Vickers has another quick post up on radio buttons with so much text that it needs wrapping ... this is for WP7, but applies to Silverlight in general. 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 April 25, 2010 -- #847

  - by Dave Campbell

  In this Issue: Michael Washington, David Poll, Andrea Boschin, Kunal Chowdhury(-2-), Lee, and Chad Campbell. Shoutout: Not at all Silverlight, but Kirupa has a great article up about Elastic Collisions From SilverlightCream.com: Easily decouple your MVVM ViewModel from your Model using RX Extensions Michael Washington continues with his Simplified MVVM and uses Rx to allow him to put web service methods in the model and call them from the ViewModel. A “refreshing” Authentication/Authorization experience with Silverlight 4 David Poll expands on his previous post and demonstrates returning the user to the page prior to the login, just the way you'd like it. Using a PollingDuplex service to handle long running activities Andrea Boschin is back discussing PollingDuplex again, this time is discussing getting updates from a long-running process. Introduction to Silverlight - Silverlight tutorials Chapter 1 Kunal Chowdhury has an intro to Silverlight Tutorial that looks good... if you're just getting started, here's a place to look. Introduction to Silverlight Application Development - Silverlight tutorial Chapter 2 In his 2nd introductory tutorial, Kunal Chowdhury gets into code and discusses User Controls. Drag and Drop grouping in Datagrid Lee has a post up where he's taken a DataGrid and produced some of the features of some of the 3rd-party controls, specifically dragging column headers to a place above the grid to sort the grid. Silverlight – HTTP request to [Url] was aborted. …local channel being closed while the request was still in progress Chad Campbell is addressing timeout problems you may hit with connecting up to your WCF service. 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 April 06, 2010 -- #832

  - by Dave Campbell

  In this Issue: Alex van Beek, Gill Cleeren, SilverlightShow, Michael Sync, Rénald Nollet, Charles Petzold, The-Oliver, and Max Paulousky. Shoutouts: Denislav Savkov of SilverlightShow ported his Slider control to WP7: Windows Phone 7 Series Sample Image Viewer SilverlightShow interview: The Silverlight Tour - what, where and why. Interview with one of the Tour organizers Laurent Duveau From SilverlightCream.com: Silverlight 4: using the VisualStateManager for state animations with MVVM Alex van Beek has an approach to resolving the MVVM issue of Animations without keeping a reference to the ViewModel by way of VisualStateManager Leveraging the ASP.NET Membership in Silverlight Gill Cleeren's post at SilverlightShow talks about using ASP.NET authentication inside your Silverlight making membership not only something you know and understand, but now the transition from your ASP.NET apps to Silverlight is simple as well. Windows Phone 7 Series RSS reader SilverlightShow has a demo RSS Reader for WP7 up... no text, but the code is there. Step by Step Tutorial : Installing Multi-Touch Simulator for Silverlight Phone 7 Michael Sync actually has a multi-touch simulator working for WP7 ... it involves a bunch of moving parts and one of the requirements is Windows 7, but if that works for you, this will too :) Element Property Binding Improvements in Blend 4 Beta and Visual Studio 2010 RC Rénald Nollet demonstrates new Blend and VS2010 features that assists you in Element Property binding with real examples. Projection Transforms Sans Math Charles Petzold is writing about Silverlight and 3D and specifically in this post 3D without math which becomes PlaneProjection... good long tutorial on it and code to back it all up. Daily Demo: Silverlight Install out of browser & Check for Update Behaviors The-Oliver has a post up about OOB and checking for updates using behaviors with only a slight change to your xaml... cool! Wizards. Prototype of sketching Wizard for WPF – 2 Max Paulousky has part 2 of his tutorial on a sketchflow Wizard for WPF ... yes WPF, but check it out... source 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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• Silverlight Cream for May 18, 2010 -- #864

  - by Dave Campbell

  In this Issue: Jesse Liberty, Chris Koenig, Kyle McClellan, Kunal Chowdhury(-2-), Tim Heuer, and Jonathan van de Veen. Shoutout: René Schulte has posted a SLARToolkit Beginner's Guide Erik Mork and the Sparkling Podcast crew posted Silverlight Week – Silverlight Android? John Papa opens up a dialog: Ask the Experts on Silverlight TV ... get your questions answered! From SilverlightCream.com: Windows Phone 7 For Silverlight Programmers Jesse Liberty's starting a series on WP7, so you obviously don't want to miss this... source, commentary, external links, how-to's... what more could you ask for?? WP7 Part 3: Navigation Chris Koenig is revamping his WP7 application to use Community Megaphone instead of Nerd Dinner and in this episode 3 he's looking into Navigation ... definitely good stuff here. RIA Services Authentication Out-Of-Browser Kyle McClellan has code up demonstrating how to get around the fact that the Browser networking stack handles cookies differently than the client networking stack used OOB, and achieve forms authentication OOB. How to work with the Silverlight BusyIndicator? Kunal Chowdhury has a post up talking about the busy indicator and how to use it to show an active indicator while disabling other content. Drag and Drop Operation in Silverlight ListBox In a second entry, Kunal Chowdhury has a nice long post displaying drag-and-drop within and between ListBox controls. Silverlight 4 Tools, WCF RIA Services and Themes Released As usual, Tim Heuer has a great post up about the new releases not only for those with 'clean' machines, but also instructions for those that have been playing along. Advanced printing in Silverlight 4 Just after a post on printing yesterday, Jonathan van de Veen has a post up at SilverlightShow on printing as well, and is demonstrating fitting the text to the page and printing multiple pages. 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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• Beginner learning assembly preserving esp after function calls

  - by Daniel

  I'm a beginner learning some assembly, when preserving the ESP register before a function call does it matter if you do it by adding or subtracting? hard to explain, consider the following mov esi, esp sub esp, 12 // on 32bit OS this would mean that there are 3 arguments to the function // push, function call etc cmp esi, esp // should be the same or mov esi, esp // push, function call etc add esp, 12 cmp esi, esp // should be the same Also if for some reason the cmp fails, is it safe to do mov esp, esi to re-align the stack? Thanks EDIT: Also how come i need to do this for a call like sprintf, but MessageBox seems to fix ESP for me? How am i to know what function needs this and what doesn't?

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• I am a beginner to C and this is the dumbest question..Confused about getchar() function

  - by happysoul

  Sorry if I am not supposed to post beginner level questions here..I am new to this site Please read the code below first I am confused about getchar() 's role in the following code.. I mean I know its helping me see the output window which will only be closed when I press enter key So getchar() is basically waiting for me to press enter and then reads a single character .. Now my question.. what is that single character this function is reading ?? I did not press any key from the keyboard for it to read Now when its not reading anything..why it does not give an error saying hey u didn't enter anything for me to read ..lol...(told u its a dumb question) #include <stdio.h> int main() { printf( "blah \n" ); getchar(); return 0; }

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• Searching for a Kohana Beginner's Tutorial for PHP

  - by Andreas Grech

  I am going to try to build a PHP website using a framework for the first time, and after some research here and there, I've decided to try to use Kohana I downloaded the source from their website, and ran the downloaded stuff on my web server, and was then greeted with a 'Welcome to Kohana!' page, and nothing more... I've tried to find some beginner tutorials on the web as regard this particular framework, but to my surprise, came up with almost nothing (only this one, but it's not a great deal of help) I am not new to PHP and neither am I new to the MVC concept, but I am very new to PHP Frameworks...so can anyone point me to a Kohana tutorial somewhere on the web that will help me get started in building my website using this framework, from scratch ? P.S. As I said, I want a beginners tutorial as regarding this case. [UPDATE] I am currently reading the Official Guide...we'll see how that goes.

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• Understanding Thread/BeginInvoke? [beginner]

  - by Moberg

  Consider the code: class Work { public void DoStuff(string s) { Console.WriteLine(s); // .. whatever } } class Master { private readonly Work work = new Work(); public void Execute() { string hello = "hello"; // (1) is this an ugly hack ? var thread1 = new Thread(new ParameterizedThreadStart(o => this.work.DoStuff((string)o))); thread1.Start(hello); thread1.Join(); // (2) is this similar to the one above? new Action<string>(s => this.work.DoStuff(s)).BeginInvoke(hello, null, null); } } Is (1) an acceptable way of easy starting some work in a seperate thread? If not a better alternative would be much appreciated. Is (2) doing the same? I guess what I ask is if a new thread is started, or.. Hope you can help a beginner to a better understanding :) /Moberg

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• Silverlight Visual Studio XAML Design view not working

  - by Piyush

  I have installed visual studio 2008 sp1, silverlight tools, silverlight sdk, silverlight toolkit 2009 but still when I open silverlight application silverlight tools are not showing on my tool window as well as silverlight XAML Design view(color code formate) is not working. Whole xaml code is coming in black color.

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• What potential do you see in Silverlight?

  - by Cyril Gupta

  Silverlight has been available since quite some time, and Silverlight 2 allows .Net programming on the front-end. I've been thinking about the apps that I can make using Silverlight, but I can't decide if I should go for development in Silverlight because i am still concerned about accessibility and acceptance. What potential do you see in Silverlight judging from the current trends, and what do you think Silverlight will be used for in the coming years?

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• Silverlight Commands Hacks: Passing EventArgs as CommandParameter to DelegateCommand triggered by Ev

  - by brainbox

  Today I've tried to find a way how to pass EventArgs as CommandParameter to DelegateCommand triggered by EventTrigger. By reverse engineering of default InvokeCommandAction I find that blend team just ignores event args.To resolve this issue I have created my own action for triggering delegate commands.public sealed class InvokeDelegateCommandAction : TriggerAction<DependencyObject>{    /// <summary>    ///     /// </summary>    public static readonly DependencyProperty CommandParameterProperty =        DependencyProperty.Register("CommandParameter", typeof(object), typeof(InvokeDelegateCommandAction), null);    /// <summary>    ///     /// </summary>    public static readonly DependencyProperty CommandProperty = DependencyProperty.Register(        "Command", typeof(ICommand), typeof(InvokeDelegateCommandAction), null);    /// <summary>    ///     /// </summary>    public static readonly DependencyProperty InvokeParameterProperty = DependencyProperty.Register(        "InvokeParameter", typeof(object), typeof(InvokeDelegateCommandAction), null);    private string commandName;    /// <summary>    ///     /// </summary>    public object InvokeParameter    {        get        {            return this.GetValue(InvokeParameterProperty);        }        set        {            this.SetValue(InvokeParameterProperty, value);        }    }    /// <summary>    ///     /// </summary>    public ICommand Command    {        get        {            return (ICommand)this.GetValue(CommandProperty);        }        set        {            this.SetValue(CommandProperty, value);        }    }    /// <summary>    ///     /// </summary>    public string CommandName    {        get        {            return this.commandName;        }        set        {            if (this.CommandName != value)            {                this.commandName = value;            }        }    }    /// <summary>    ///     /// </summary>    public object CommandParameter    {        get        {            return this.GetValue(CommandParameterProperty);        }        set        {            this.SetValue(CommandParameterProperty, value);        }    }    /// <summary>    ///     /// </summary>    /// <param name="parameter"></param>    protected override void Invoke(object parameter)    {        this.InvokeParameter = parameter;                if (this.AssociatedObject != null)        {            ICommand command = this.ResolveCommand();            if ((command != null) && command.CanExecute(this.CommandParameter))            {                command.Execute(this.CommandParameter);            }        }    }    private ICommand ResolveCommand()    {        ICommand command = null;        if (this.Command != null)        {            return this.Command;        }        var frameworkElement = this.AssociatedObject as FrameworkElement;        if (frameworkElement != null)        {            object dataContext = frameworkElement.DataContext;            if (dataContext != null)            {                PropertyInfo commandPropertyInfo = dataContext                    .GetType()                    .GetProperties(BindingFlags.Public | BindingFlags.Instance)                    .FirstOrDefault(                        p =>                        typeof(ICommand).IsAssignableFrom(p.PropertyType) &&                        string.Equals(p.Name, this.CommandName, StringComparison.Ordinal)                    );                if (commandPropertyInfo != null)                {                    command = (ICommand)commandPropertyInfo.GetValue(dataContext, null);                }            }        }        return command;    }}Example:<ComboBox>    <ComboBoxItem Content="Foo option 1" />    <ComboBoxItem Content="Foo option 2" />    <ComboBoxItem Content="Foo option 3" />    <Interactivity:Interaction.Triggers>        <Interactivity:EventTrigger EventName="SelectionChanged" >            <Presentation:InvokeDelegateCommandAction                 Command="{Binding SubmitFormCommand}"                CommandParameter="{Binding RelativeSource={RelativeSource Self}, Path=InvokeParameter}" />        </Interactivity:EventTrigger>    </Interactivity:Interaction.Triggers>                </ComboBox>BTW: InvokeCommanAction CommandName property are trying to find command in properties of view. It very strange, because in MVVM pattern command should be in viewmodel supplied to datacontext.

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• March 21st Links: ASP.NET, ASP.NET MVC, AJAX, Visual Studio, Silverlight

  - by Latest Microsoft Blogs

  Here is the latest in my link-listing series . If you haven’t already, check out this month’s " Find a Hoster ” page on the www.asp.net website to learn about great (and very inexpensive) ASP.NET hosting offers.  [In addition to blogging, I Read More......(read more)

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• Silverlight layout hack: Centered content with fixed maxwidth

  - by brainbox

   Today we need to create centered content with fixed maxwidth. It is very easy to implement it for fixed width, but is not clear how to achieve the same for maxwidth.The solution to the problem is Grid with 3 columns: <Grid>      <Grid.ColumnDefenitions>            <ColumnDefenition Width="0.01*" />             <ColumnDefenition Width="0.98*" MaxWidth="1280" />            <ColumnDefenition Width="0.01*" />      </Grid.ColumnDefenitions> </Grid>Huh... like html coding xaml coding is still full of dirty tricks =)

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• Silverlight hierarchy gridview with MVVM

  - by Suresh Behera

  Since few days i have been struggling to bind a gridview from a simple WCF async call. Following article look promising… http://blogs.telerik.com/vladimirenchev/posts/09-10-16/how_to_silverlight_grid_hierarchy_load_on_demand_using_mvvm_and_ria_services.aspx I conclude binding is not simple traditional databind() method call from gridview if you don’t know howto ;) Thanks, Suresh...(read more)

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• [Silverlight] How to watermark a WriteableBitmap with a text

  - by Benjamin Roux

  Hello, In my current project, I needed to watermark a WriteableBitmap with a text. As I couldn’t find anything I decided to create a small extension method to do so. public static class WriteableBitmapEx { /// <summary> /// Creates a watermark on the specified image /// </summary> /// <param name="input">The image to create the watermark from</param> /// <param name="watermark">The text to watermark</param> /// <param name="color">The color - default is White</param> /// <param name="fontSize">The font size - default is 50</param> /// <param name="opacity">The opacity - default is 0.25</param> /// <param name="hasDropShadow">Specifies if a drop shadow effect must be added - default is true</param> /// <returns>The watermarked image</returns> public static WriteableBitmap Watermark(this WriteableBitmap input, string watermark, Color color = default(Color), double fontSize = 50, double opacity = 0.25, bool hasDropShadow = true) { var watermarked = GetTextBitmap(watermark, fontSize, color == default(Color) ? Colors.White : color, opacity, hasDropShadow); var width = watermarked.PixelWidth; var height = watermarked.PixelHeight; var result = input.Clone(); var position = new Rect(input.PixelWidth - width - 20 /* right margin */, input.PixelHeight - height, width, height); result.Blit(position, watermarked, new Rect(0, 0, width, height)); return result; } /// <summary> /// Creates a WriteableBitmap from a text /// </summary> /// <param name="text"></param> /// <param name="fontSize"></param> /// <param name="color"></param> /// <param name="opacity"></param> /// <param name="hasDropShadow"></param> /// <returns></returns> private static WriteableBitmap GetTextBitmap(string text, double fontSize, Color color, double opacity, bool hasDropShadow) { TextBlock txt = new TextBlock(); txt.Text = text; txt.FontSize = fontSize; txt.Foreground = new SolidColorBrush(color); txt.Opacity = opacity; if (hasDropShadow) txt.Effect = new DropShadowEffect(); WriteableBitmap bitmap = new WriteableBitmap((int)txt.ActualWidth, (int)txt.ActualHeight); bitmap.Render(txt, null); bitmap.Invalidate(); return bitmap; } } For this code to run, you need the WritableBitmapEx library. As you can see, it’s quite simple. You just need to call the Watermark method and pass it the text you want to add in your image. You can also pass optional parameters like the color, the opacity, the fontsize or if you want a drop shadow effect. I could have specify other parameters like the position or the the font family but you can change the code if you need to. Here’s what it can give Hope this helps.

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• DallasXAML.com – A New User Group for Silverlight, WPF, XBAP, etc.

  - by vblasberg

                                   http://DallasXAML.com   I’ve devoted much of last month to starting the DallasXAML User Group.  I finally got back into user group management after 2 years away from leading the Dallas C# SIG.  Now I’m having fun getting a Silverlight/WPF user group going strong for the Dallas / Ft. Worth community.  Our first meeting was March 3rd at the Improving Enterprises offices in North Dallas.  We had about 25 to 35 attendees in the first meeting and it went well.  We covered the most important topic that everyone should understand well – data binding.   So I chose the XAML user group so we can get together for a common group improvement in the Dallas / Ft. Worth area and learn cross-technology information that we can use now.  It is not a lecture hall.  The great thing is that we’ll provide hands-on experience with most every meeting.  The goal is to get the experience that we can use the next work day.  I unfortunately broke that rule by speaking all through the first meeting, but next month is part two with more hands-on data binding.   The differentiation is this group concentrates on XAML, not Silverlight or Windows Client alone.  What we learn in one area, we gain for all areas.  That includes the Silverlight for Windows Phone 7 coming later this year.  Next year it may be Windows Phone 8, 9, or whatever.    I started developing WPF seriously almost a year ago.  I experienced the painful learning curve.  Anyone who reports that there isn’t a big learning curve either thinks in XAML before it was developed, is on the Silverlight or WPF development team, or has already conquered the learning and forgot the pain.  So I wanted to share the pain or make it easier for others – same thing.  I have found that the more I learn and use good disciplined techniques, the more interesting and rewarding development is again.   A few months ago, I was sitting in the iPhone development session at the Dallas C# SIG.  After the meeting, the audience was polled for future topics.  After a few suggestions, Silverlight got the big hands up.  That makes sense because it’s still the hot topic for many Microsoft developers.  So I surfed around and found that there aren’t enough user groups to help in this area.  I polled a few local group leaders and did the work to start the group.  This week I got a telerik controls licence and improved the site with some great controls, namely the RadHtmlPlaceholder control.  It provides a Silverlight control to show HTML in an IFrame-like area.  On DallasXAML.com, the newsletters and resource pages display in HTML because Silverlight just isn’t there yet.  I’m looking forward to a Silverlight XPS viewer with flow documents.  There are some good commercial version available, but this is a non-profit group.    The DallasXAML.com site points to many other resources such as podcasts and webcasts.  I would rather give them the credit than try to out-do them.  So check out the DallasXAML user group site and attend our meetings if you can.  We meet the first Tuesday of the month.   -Vince DallasXAML User Group Leader  

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• Alternative of SortedDictionary in Silverlight

  - by Rajneesh Verma

  Hi, As we know SortedDictionary is not not present in Silverlightso to find alternative of this i am using Dictionary as System.Collections.Generic . Dictionary (Of TKey, TValue ) . KeyCollection and for sorting i am using LINQ query. see the full code below. Dim sortedLists As New Dictionary(Of String, Object) Dim query = From sortedList In sortedLists Order By sortedList.Key Ascending Select sortedList.Key, sortedList.Value For Each que In query 'get the key value using que.Key 'get the value using...(read more)

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• Pythonic mapping of an array (Beginner)

  - by scott_karana

  Hey StackOverflow, I've got a question related to a beginner Python snippet I've written to introduce myself to the language. It's an admittedly trivial early effort, but I'm still wondering how I could have written it more elegantly. The program outputs NATO phoenetic readable versions of an argument, such "H2O" - "Hotel 2 Oscar", or (lacking an argument) just outputs the whole alphabet. I mainly use it for calling in MAC addresses and IQNs, but it's useful for other phone support too. Here's the body of the relevant portion of the program: #!/usr/bin/env python import sys nato = { "a": 'Alfa', "b": 'Bravo', "c": 'Charlie', "d": 'Delta', "e": 'Echo', "f": 'Foxtrot', "g": 'Golf', "h": 'Hotel', "i": 'India', "j": 'Juliet', "k": 'Kilo', "l": 'Lima', "m": 'Mike', "n": 'November', "o": 'Oscar', "p": 'Papa', "q": 'Quebec', "r": 'Romeo', "s": 'Sierra', "t": 'Tango', "u": 'Uniform', "v": 'Victor', "w": 'Whiskey', "x": 'Xray', "y": 'Yankee', "z": 'Zulu', } if len(sys.argv) < 2: for n in nato.keys(): print nato[n] else: # if sys.argv[1] == "-i" # TODO for char in sys.argv[1].lower(): if char in nato: print nato[char], else: print char, As I mentioned, I just want to see suggestions for a more elegant way to code this. My first guess was to use a list comprehension along the lines of [nato[x] for x in sys.argv[1].lower() if x in nato], but that doesn't allow me to output any non-alphabetic characters. My next guess was to use map, but I couldn't format any lambdas that didn't suffer from the same corner case. Any suggestions? Maybe something with first-class functions? Messing with Array's guts? This seems like it could almost be a Code Golf question, but I feel like I'm just overthinking :)

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• Beginner problems with references to arrays in python 3.1.1

  - by Protean

  As part of the last assignment in a beginner python programing class, I have been assigned a traveling sales man problem. I settled on a recursive function to find each permutation and the sum of the distances between the destinations, however, I am have a lot of problems with references. Arrays in different instances of the Permute and Main functions of TSP seem to be pointing to the same reference. from math import sqrt class TSP: def __init__(self): self.CartisianCoordinates = [['A',[1,1]], ['B',[2,2]], ['C',[2,1]], ['D',[1,2]], ['E',[3,3]]] self.Array = [] self.Max = 0 self.StoredList = ['',0] def Distance(self, i1, i2): x1 = self.CartisianCoordinates[i1][1][0] y1 = self.CartisianCoordinates[i1][1][1] x2 = self.CartisianCoordinates[i2][1][0] y2 = self.CartisianCoordinates[i2][1][1] return sqrt(pow((x2 - x1), 2) + pow((y2 - y1), 2)) def Evaluate(self): temparray = [] Data = [] for i in range(len(self.CartisianCoordinates)): Data.append([]) for i1 in range(len(self.CartisianCoordinates)): for i2 in range(len(self.CartisianCoordinates)): if i1 != i2: temparray.append(self.Distance(i1, i2)) else: temparray.append('X') Data[i1] = temparray temparray = [] self.Array = Data self.Max = len(Data) def Permute(self,varray,index,vcarry,mcarry): #Problem Class array = varray[:] carry = vcarry[:] for i in range(self.Max): print ('ARRAY:', array) print (index,i,carry,array[index][i]) if array[index][i] != 'X': carry[0] += self.CartisianCoordinates[i][0] carry[1] += array[index][i] if len(carry) != self.Max: temparray = array[:] for j in range(self.Max):temparray[j][i] = 'X' index = i mcarry += self.Permute(temparray,index,carry,mcarry) else: return mcarry print ('pass',mcarry) return mcarry def Main(self): out = [] self.Evaluate() for i in range(self.Max): array = self.Array[:] #array appears to maintain the same reference after each copy, resulting in an incorrect array being passed to Permute after the first iteration. print (self.Array[:]) for j in range(self.Max):array[j][i] = 'X' print('I:', i, array) out.append(self.Permute(array,i,[str(self.CartisianCoordinates[i][0]),0],[])) return out SalesPerson = TSP() print(SalesPerson.Main()) It would be greatly appreciated if you could provide me with help in solving the reference problems I am having. Thank you.

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• Is anyone else experiencing weird debug + crash behavior with Silverlight?

  - by Scott Barnes

  I have noticed that after awhile of debug/tweakcode/debug etc that eventually Silverlight starts to crash all of my browsers (i.e. doesn't matter which i fire, they all just crash). If i then go to a site that has Silverlight, it works fine? so it has something to do with debugger + Silverlight not getting along? I then reboot and the problem goes away? Is anyone else experiencing this kind of weird behaviour? I have noticed though that if i put breakpoints on the code they all seem to halt, in that it appears that it can instantiate the said .xap etc ok, but just can't seem to render it to screen without a crash? (There's nothing in the log files and i've tried to attach a seperate VS2008 instance to both IE, Devenv and Blend etc trying to see if i can catch what's causing this to occur?)

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• Updating Silverlight with data. JSON or WCF?

  - by Alastair Pitts

  We will be using custom Silverlight 4.0 controls on our ASP.NET MVC web page to display data from our database and was wondering what the most efficient method was? We will be having returned values of up to 100k records (of 2 properties per record). We have a test that uses the HTML Bridge from Javascript to Silverlight. First we perform a post request to a controller action in the MVC web app and return JSON. This JSON is then passed to the Silverlight where it is parsed and the UI updated. This seems to be rather slow, with the stored procedure (the select) taking about 3 seconds and the entire update in the browser about 10-15sec. Having a brief look on the net, it seems that WCF is another option, but not having used it, I wasn't sure of it's capability or suitability. Does anyone have any experiences or recommendations?

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