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Adventures in Windows 8: Solving activation errors

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Note: I tagged this article with “MVVM” because I got a few support requests for MVVM Light regarding this exact issue. In fact it is a Windows 8 issue and has nothing to do with MVVM Light per se… Sometimes when you work on a Windows 8 app, you will get a very annoying issue when starting the app. In that case, the app doesn’t not even start past the Splash screen. Putting a breakpoint in App.xaml.cs doesn’t help because the app doesn’t even reach that point! So what exactly is happening? Well when a Windows 8 app
starts, the system is performing a few check first. One of the checks, for instance, is to see if an app with the same package ID is already available. The package ID is a unique value set in the package manifest. In the Solution Explorer, double click on Package.appxmanifest. This opens the manifest in a special editor Click on the Packaging tab See the GUID under Package Name. This is the unique ID I am talking about.

Giveaways on the Celebration for 500+ Posts Completion - #Pluralsight Subscription + #SQL Book + #Telerik License

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It’s celebration time for me as I have completed a 500 posts milestone in my blog and as announced, I am going to raffle few goodies to my blog followers for their support. This will have 4 different types of items to giveaway.   Don’t waste your time and enter to this small contest to Win subscription from Pluralsight, SQL Server Interview book from Pinal Dave/Vinod Kumar, Telerik license and more.   No doubt it’s a time for celebration for me and I want to contribute it to my blog followers
who actively participated in my blog, facebook page and twitter handle. And due to this, I am throwing out a contest to win one of the few items listed below: Monthly Subscription to Pluralsight Video Library SQL Server Interview Questions book authored by Pinal Dave and Vinod Kumar Telerik DevCraft Complete License  Complimentary “Screen Capture” license for everyone   To participate...(Read whole news on source site)

Controlling a NETMF Gadgeteer Robot from a Windows 8 App

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At several recent events (VSLive Redmond, thatConference, the Heartland Developer Conference and more), I've had a neat little .NET Micro Framework robot with me. The remote control for the robot is a Windows 8 tablet running a simple Modern UI/Windows Store app I wrote in C#/XAML. The example shows both how you can use C# skills to build robots, and also how flexible the new Windows Store app model is when it comes to communicating with remote devices. Video When on campus, I also recorded a video with Robert Green. You can see it here: http://channel9.msdn.com/Shows/Visual-Studio-Toolbox/Windows-8-and-the-NET-Micro-Framework The remainder of this post will explain what you need to do
to build one yourself. Parts Although they're out there, it's rare to find a robot as a complete kit. Typically you need to assemble one from a number of different parts. Here are the parts I used. The body When you create a robot, it can be a huge help to start with a chassis kit. Sparkfun Magician Chassis $14.95 The chassis comes with two motors, the robot body, assembly screws and stand-offs, two wheels, one ball coaster, and 4xAA battery holder. The motors are cheap, and unbalanced, but … they're cheap! This is a great chassis for experimentation and includes a set of features almost unheard of at this price point....(Read whole news on source site)

Introduction to Windows 8 Development–Go Metro!

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Last week I had the pleasure of speaking at this year’s Heartland Developers Conference (HDC).  I gave an introductory talk on developing “Metro” applications for Windows 8.  The goal of the talk was to cover some of the basic features that every developer writing Windows 8 apps would have to face when first getting started.  Some of these features include: Obtaining Windows 8 Obtaining the developers tools – e.g. Visual Studio 2012 Understanding the Windows Runtime framework Specific application features such as:
Roaming data (e.g. app settings) to the cloud Contracts and extensions Using the File Picker Implementing application settings (via the charms bar) Create app bars Understanding the application lifecycle Windows Store Registration Packaging Publishing The talk went very well and I was...(Read whole news on source site)

Giveaways on the Celebration for 500+ Posts Completion

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It’s celebration time for me as I have completed a 500 posts milestone in my blog and as announced, I am going to raffle few goodies to my blog followers for their support. This will have 4 different types of items to giveaway.   Don’t waste your time and enter to this small contest to Win subscription from Pluralsight, SQL Server Interview book from Pinal Dave/Vinod Kumar, Telerik license and more.   No doubt it’s a time for celebration for me and I want to contribute it to my blog followers
who actively participated in my blog, facebook page and twitter handle. And due to this, I am throwing out a contest to win one of the few items listed below: Monthly Subscription to Pluralsight Video Library SQL Server Interview Questions book authored by Pinal Dave and Vinod Kumar Telerik DevCraft Complete License  To participate in this contest to win those, you need to drop a feedback about my blog...(Read whole news on source site)

Nightly news, 10 Sep 2012

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TechEd last week so this covers last weeks news :) LightSpeed Add attributes to scope validation traversal Allow NoActionNoCheck to be applied to ToMany associations generally Web Workbench Fix for intellisense getting lost on the line immediately following a comment Added recoverability to syntax highlighting parser WPF Elements Misc fixes for DataGrid control Chart control [...]

Solution Explorer in Visual Studio 2012

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There are lots of new Solution Explorer features in Visual Studio 2012, so many that they did not all fit into one blog post. The following are posts that outline the new features: Solution Explorer Sync'ing in Visual Studio 2012 Visual Studio 2012: Did You Call Me? Solution Explorer Scoping in Visual Studio 2012 Solution Explorer Filtering in Visual Studio 2012 Preventing Tab Bloat with Visual Studio 2012 Working with Multiple Solution Explorer Windows in
Visual Studio 2012 Enjoy!
...(Read whole news on source site)

Single Page Apps - Part 10 - Saving, Change Tracking, Commanding, and Validation

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Saving data is simple, right? What app isn’t complete without some sort of saving mechanism? And while I’m at it, it’s nice to be able to track when changes occur so I can tell if a user can press the save button or even leave the current screen. Which bring me to making my buttons smart enough to know that they are already involved in a asynchronous process, so commanding would be nice. Finally, if I want to save data, it might be a good idea to validate the input on the client (and the server). There are a lot
of moving parts involved with saving changes, and I cover these in my new Pluralsight course “Single Page Apps with HTML5, ASP.NET Web API, Knockout, and jQuery”. You can catch up on the previous posts in this series here: More on the Code Camper SPA Part 1 - The Story Begins (What is the Code Camper SPA?) Part 2 - Client Technologies Part 3 - Server Technologies (the Data Layer) Part 4 - Serving JSON with ASP.NET Web API Part 5 - HTML 5 and ASP.NET Web Optimization Part 6 -...(Read whole news on source site)

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