Click here to close now.

Welcome!

Apache Authors: Yeshim Deniz, Pat Romanski, Alena Prokharchyk, AppDynamics Blog, Carmen Gonzalez

Related Topics: .NET, Silverlight, Apache

.NET: Blog Post

The Road to Windows 8 Development Success

Key Tenets and Skills

Did you spend the weekend getting to know your Surface – like many of those who lined up at Microsoft Stores across the country?

And now you’re considering getting your own application into the Windows Store, but not sure where to begin?

Well, we all started somewhere, and although I’m far from laying claim to a Windows 8 app with thousands of downloads, over the past few months of working with developers as well as on my own, I’ve settled on my own shortlist of things to know about Windows 8 development that are I feel are keys to future success.

Read the store certification requirements, then read them again.

For your application to be in the Windows Store, it must pass certification which comprises a set of security, technical, and content compliance tests. Simply leaving a debug statement in your code or forgetting to provide a privacy policy for your application can result in rejection. Before you submit your app you’ll definitely want to make sure it passes the Windows Application Certification Kit on your own device. Take a look as well at Resolving certification errors to avoid common issues and the resulting delay in getting your application on the market.

User experience matters.

Windows Store applications are different. They look different and act differently from what many of us have previously built on the Windows platform – whether it be Windows Forms, WPF, Silverlight or ASP.NET. It’s not just a matter of translating user interface elements or applying a new theme or skin. Successful Windows 8 applications will embrace the modern Windows application design, which have been influenced by movements like the Swiss Style and Bauhaus. Take time to embrace the Windows 8 design principles, and eschew skeumorphism!.

When it comes to crafting that user experience, there are many different avenues available: XAML (with Visual Basic, C#, and C++), DirectX with C++, and CSS with HTML5 and JavaScript. The more adept you are with those rendering technologies, the more compelling your app will be. In that journey, you’ll likely find yourself gravitating more and more to the incredible functionality of Blend for Visual Studio.

For building games, even more options abound, including multiple JavaScript libraries like ImpactJS and EaselJS and offerings like GameSalad and Construct 2. Full-featured game engines like Unreal Engine 3 and Unity have also announced support for Windows 8.

Embrace the MVVM pattern.

Windows 8 applications typically consist of just a few (or perhaps even just one) page, with controls and data-binding governing much of the experience. The Model-View-ViewModel design pattern (which is a close cousin of Presentation Model, Model-View-Presenter and Model-View-Controller) has quickly become the de facto model for XAML based application development, whether it be Silverlight, WPF, or Windows 8. For HTML5/JS applications, data-binding is also a key facet; however, since two-way binding is not explicitly supported, there can be a bit more work involved when using MVVM.

You’ll find there’s even a DefaultViewModel property for many of the XAML-based Windows 8 project templates to steer you toward this goal.  There are also some excellent blog posts from various authors on the topic, and the MVVM Light Toolkit (from Laurent Bugnion) is a common starting point.

Windows Store applications are mobile applications.

If you’ve built applications for Windows Phone or even iOS or Android, you will be familiar with a focus on providing a consistent, responsive user experience. To guarantee that level of experience regardless of the what is currently running on that device, applications are necessarily constrained. They run within a sandbox with limited access outside of that sandbox (unless authorized by the user), and they have a very distinct lifecycle controlled by the user and the operating system more so than by the developer.

Successful applications built for Windows 8 will be mindful of battery life, provide both a connected and a disconnected experience, work well on low-power devices, and mold the experience to the characteristics of the device on which they are executing thus becoming authentically digital.

Understand the application lifecycle.

Every Windows 8 Store application is bound by the same lifecycle, and it’s incumbent on the developer to understand when state transitions occur and what actions should be taken as a result.

For instance, an application can be activated by clicking on its live tile of course, but it may also be activated through a search or by another application via protocol activation. And as soon that other application is brought into view, the current application is suspended. It’s then up to the developer to save any application state, since a suspended application could be completely terminated by the operating system – with no further notification - should there be memory or battery life pressure.

State diagram showing transitions between app execution states

Asynchrony is the norm.

Windows 8 applications are often characterized in marketing-speak as fast and fluid. The consistency of performance in reaction to user input is a key part of the experience and enforced by strict timing requirements. For instance, applications much launch within five seconds or less and must suspend in two seconds or less.

In fact, any operation that takes more than 200 ms is a prime candidate for an asynchronous implementation, one that does not require the UI to stop and wait for it to complete. This is baked into Windows RT as well since most file and network operations are available only as asynchronous methods.

Luckily asynchronous processing has become that much easier in .NET 4.5, and Visual Basic and C# developers can leverage the async/await pattern, allowing them to code in a synchronous style but with asynchronous methods. JavaScript developers can use promises that similarly abstract the complexities of asynchronous programming. And if you’re a C++ developer, then you’ll be using the task class that’s part of the Concurrency Runtime,

Notifications can be a key application differentiator.

Notifications are a fantastic feature of the Windows 8 platform, one that can take your application from meh to wow. A built-in notification engine can serve up tile, toast, and badge updates to your application even when the application isn’t running - thus expanding its presence and impact in the eyes of your users.

Live tile updatesTile notifications provide the glance-and-go experience that differentiates the Windows 8 Start Screen. Live tiles are the only persistent visual presence of your application on the user’s device, and they are “live” solely because of notifications, providing updates to your application and enticing the user to run your app again and again.

Toast notifications are more personalized and immediate, informing the user of something of specific interest that’s actionable right at that time. Used appropriately they can provide a compelling, just-in-time experience and be part of an application the user just can’t do with out.

Lastly, badges are essentially an extension of the tile, providing a quick indication of the state of an application, like whether a video has been paused or how many unread e-mails are in your in-box.

Leverage contracts and extensions to broaden your application’s presence.

The sandbox model of a Windows Store application at first seems incredibly constraining – you can’t write to the file system, can’t read from the registry, can’t even detect what version of Windows is currently running! If you step back and view things from an end-user perspective though, you’ll realize that many of those capabilities serve the developer and not the user. In Windows 8 the user is in charge, and a consistent experience is paramount.

In some ways it’s liberating and democratizing for developers, there are defined rules – contracts, if you will – that every application has access to and no application can circumvent.

  • Want to save a file to C:\ directly? Your application can, but the user must approve that action through the file picker.
  • Want to have your application automatically handle a certain type of file? You can, but via file activation, and even then the user gets to pick which application she wants to response to that request (from among installed applications than can handle that file type).
  • Want to search across data managed by other applications? You can - via the search contract.

It’s through these contracts and extensions that your users’ experience can extend beyond the boundaries of your own application and your application can reach new users through discovery mechanisms built-in to the Windows 8 runtime.

The Cloud is a unifier.

Does anyone have only one internet connected device in this day and age? We have smartphones, laptops, desktops, game consoles, etc., many of which run similar or companion applications, and increasingly we expect our experiences to transcend the device. We watch a movie on our slate or phone during the commute on the train and expect to finish that movie at home on our Xbox. We increasingly rely on apps like OneNote and Evernote to make our to-do list available wherever we happen to be at the time.

Underlying the connected experiences is the cloud, and within Windows 8 it’s not a bolted-on experience. SkyDrive is a first class citizen, your social media presence on Twitter, Facebook, LinkedIn, Google are linked in the People app, and developers can make use of roaming storage which automatically handles the synchronization of application data across Windows 8 devices linked to a given user’s Microsoft account.

Windows Azure - try free for 90 daysStepping it up a notch, Windows 8 applications can easily tie into Windows Azure Mobile Services for common application needs like simple structured data storage, authentication across identity providers like Facebook and Twitter, and to provide the plumbing for push notifications. Of course you don’t have to stop there, Windows Azure has numerous other services that you can easily tap into to increase the impact, reach, and agility of your application.

Your profits are in your hands.

Having your application in the Windows Store is a tremendous opportunity, with over 670 millions upgradeable licenses of Windows 7 in the wild now and an estimated 300 million units of Windows 8 shipping in 2013, so take some time to decide how to monetize your application, as there are several options you can use alone or in combination.

  • You can simply charge for your application (anywhere from $1.49 to $999.99), where each download is a purchase and you retain 70% of the proceeds (or 80% once you’ve reached the $25,000 mark). Optionally, you can opt to enable a time-limited or feature-limited trial as part of your application, which can significantly increase your purchase rate over an application without such an option.
  • You might decide not to charge for the app at all and make your money from ads presented within your application via the Microsoft Advertising SDK or a third-party ad provider. By the way, according to a 2011 Gartner report, mobile advertising revenue is slated to reach $20.6 billion 2015, up from $3.3 billion in 2011.
  • Increasingly, applications are turning to in-app purchases as a primary monetization technique either using the built-in Windows.ApplicationModel.Store namespace or a third-party commerce provider. As food for thought, in July 2011 Distimo noted that although only 4% of all iPhone applications leveraged in-app purchases, those purchases accounted for 72% of all application revenue, a 150% increase over the prior year. That same report also showed that free downloads of applications exceeded those of paid applications by a factor of five.

Before settling on your approach, do take time to review other apps in your category and the monetization trends for those applications. Different types of applications engender different expectations on the part of end users. For example, statistics from the Windows Phone store indicate that consumers are more likely to pay for games than for any other category of applications, by a factor of six.

In conclusion, I wish you good luck on your Windows 8 development journey, and I welcome your thoughts, stories, and feedback!

More Stories By Jim O'Neil

Jim is a Technology Evangelist for Microsoft who covers the Northeast District, namely, New England and upstate New York. He is focused on engaging with the development community in the area through user groups, code camps, BarCamps, Microsoft-sponsored events, etc., and just in general serve as ambassador for Microsoft. Since 2009, Jim has been focusing on software development scenarios using cloud computing and Windows Azure. You can follow Jim on Twitter at @jimoneil

@ThingsExpo Stories
SYS-CON Events announced today that IDenticard will exhibit at SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. IDenticard™ is the security division of Brady Corp (NYSE: BRC), a $1.5 billion manufacturer of identification products. We have small-company values with the strength and stability of a major corporation. IDenticard offers local sales, support and service to our customers across the United States and Canada. Our partner network encompasses some 300 of the world's leading systems integrators and security s...
SYS-CON Events announced today the IoT Bootcamp – Jumpstart Your IoT Strategy, being held June 9–10, 2015, in conjunction with 16th Cloud Expo and Internet of @ThingsExpo at the Javits Center in New York City. This is your chance to jumpstart your IoT strategy. Combined with real-world scenarios and use cases, the IoT Bootcamp is not just based on presentations but includes hands-on demos and walkthroughs. We will introduce you to a variety of Do-It-Yourself IoT platforms including Arduino, Raspberry Pi, BeagleBone, Spark and Intel Edison. You will also get an overview of cloud technologies s...
The best mobile applications are augmented by dedicated servers, the Internet and Cloud services. Mobile developers should focus on one thing: writing the next socially disruptive viral app. Thanks to the cloud, they can focus on the overall solution, not the underlying plumbing. From iOS to Android and Windows, developers can leverage cloud services to create a common cross-platform backend to persist user settings, app data, broadcast notifications, run jobs, etc. This session provides a high level technical overview of many cloud services available to mobile app developers, includi...
“In the past year we've seen a lot of stabilization of WebRTC. You can now use it in production with a far greater degree of certainty. A lot of the real developments in the past year have been in things like the data channel, which will enable a whole new type of application," explained Peter Dunkley, Technical Director at Acision, in this SYS-CON.tv interview at @ThingsExpo, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
Health care systems across the globe are under enormous strain, as facilities reach capacity and costs continue to rise. M2M and the Internet of Things have the potential to transform the industry through connected health solutions that can make care more efficient while reducing costs. In fact, Vodafone's annual M2M Barometer Report forecasts M2M applications rising to 57 percent in health care and life sciences by 2016. Lively is one of Vodafone's health care partners, whose solutions enable older adults to live independent lives while staying connected to loved ones. M2M will continue to gr...
SYS-CON Events announced today that Ciqada will exhibit at SYS-CON's @ThingsExpo, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. Ciqada™ makes it easy to connect your products to the Internet. By integrating key components - hardware, servers, dashboards, and mobile apps - into an easy-to-use, configurable system, your products can quickly and securely join the internet of things. With remote monitoring, control, and alert messaging capability, you will meet your customers' needs of tomorrow - today! Ciqada. Let your products take flight. For more inform...
Containers and microservices have become topics of intense interest throughout the cloud developer and enterprise IT communities. Accordingly, attendees at the upcoming 16th Cloud Expo at the Javits Center in New York June 9-11 will find fresh new content in a new track called PaaS | Containers & Microservices Containers are not being considered for the first time by the cloud community, but a current era of re-consideration has pushed them to the top of the cloud agenda. With the launch of Docker's initial release in March of 2013, interest was revved up several notches. Then late last...
While not quite mainstream yet, WebRTC is starting to gain ground with Carriers, Enterprises and Independent Software Vendors (ISV’s) alike. WebRTC makes it easy for developers to add audio and video communications into their applications by using Web browsers as their platform. But like any market, every customer engagement has unique requirements, as well as constraints. And of course, one size does not fit all. In her session at WebRTC Summit, Dr. Natasha Tamaskar, Vice President, Head of Cloud and Mobile Strategy at GENBAND, will explore what is needed to take a real time communications ...
SYS-CON Media announced today that @WebRTCSummit Blog, the largest WebRTC resource in the world, has been launched. @WebRTCSummit Blog offers top articles, news stories, and blog posts from the world's well-known experts and guarantees better exposure for its authors than any other publication. @WebRTCSummit Blog can be bookmarked ▸ Here @WebRTCSummit conference site can be bookmarked ▸ Here
Dave will share his insights on how Internet of Things for Enterprises are transforming and making more productive and efficient operations and maintenance (O&M) procedures in the cleantech industry and beyond. Speaker Bio: Dave Landa is chief operating officer of Cybozu Corp (kintone US). Based in the San Francisco Bay Area, Dave has been on the forefront of the Cloud revolution driving strategic business development on the executive teams of multiple leading Software as a Services (SaaS) application providers dating back to 2004. Cybozu's kintone.com is a leading global BYOA (Build Your O...
SYS-CON Events announced today that GENBAND, a leading developer of real time communications software solutions, has been named “Silver Sponsor” of SYS-CON's WebRTC Summit, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. The GENBAND team will be on hand to demonstrate their newest product, Kandy. Kandy is a communications Platform-as-a-Service (PaaS) that enables companies to seamlessly integrate more human communications into their Web and mobile applications - creating more engaging experiences for their customers and boosting collaboration and productiv...
SYS-CON Events announced today that BroadSoft, the leading global provider of Unified Communications and Collaboration (UCC) services to operators worldwide, has been named “Gold Sponsor” of SYS-CON's WebRTC Summit, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. BroadSoft is the leading provider of software and services that enable mobile, fixed-line and cable service providers to offer Unified Communications over their Internet Protocol networks. The Company’s core communications platform enables the delivery of a range of enterprise and consumer calling...
The 17th International Cloud Expo has announced that its Call for Papers is open. 17th International Cloud Expo, to be held November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA, brings together Cloud Computing, APM, APIs, Microservices, Security, Big Data, Internet of Things, DevOps and WebRTC to one location. With cloud computing driving a higher percentage of enterprise IT budgets every year, it becomes increasingly important to plant your flag in this fast-expanding business opportunity. Submit your speaking proposal today!
So I guess we’ve officially entered a new era of lean and mean. I say this with the announcement of Ubuntu Snappy Core, “designed for lightweight cloud container hosts running Docker and for smart devices,” according to Canonical. “Snappy Ubuntu Core is the smallest Ubuntu available, designed for security and efficiency in devices or on the cloud.” This first version of Snappy Ubuntu Core features secure app containment and Docker 1.6 (1.5 in main release), is available on public clouds, and for ARM and x86 devices on several IoT boards. It’s a Trend! This announcement comes just as...
What exactly is a cognitive application? In her session at 16th Cloud Expo, Ashley Hathaway, Product Manager at IBM Watson, will look at the services being offered by the IBM Watson Developer Cloud and what that means for developers and Big Data. She'll explore how IBM Watson and its partnerships will continue to grow and help define what it means to be a cognitive service, as well as take a look at the offerings on Bluemix. She will also check out how Watson and the Alchemy API team up to offer disruptive APIs to developers.
The IoT Bootcamp is coming to Cloud Expo | @ThingsExpo on June 9-10 at the Javits Center in New York. Instructor. Registration is now available at http://iotbootcamp.sys-con.com/ Instructor Janakiram MSV previously taught the famously successful Multi-Cloud Bootcamp at Cloud Expo | @ThingsExpo in November in Santa Clara. Now he is expanding the focus to Janakiram is the founder and CTO of Get Cloud Ready Consulting, a niche Cloud Migration and Cloud Operations firm that recently got acquired by Aditi Technologies. He is a Microsoft Regional Director for Hyderabad, India, and one of the f...
In 2015, 4.9 billion connected "things" will be in use. By 2020, Gartner forecasts this amount to be 25 billion, a 410 percent increase in just five years. How will businesses handle this rapid growth of data? Hadoop will continue to improve its technology to meet business demands, by enabling businesses to access/analyze data in real time, when and where they need it. Cloudera's Chief Technologist, Eli Collins, will discuss how Big Data is keeping up with today's data demands and how in the future, data and analytics will be pervasive, embedded into every workflow, application and infra...
As Marc Andreessen says software is eating the world. Everything is rapidly moving toward being software-defined – from our phones and cars through our washing machines to the datacenter. However, there are larger challenges when implementing software defined on a larger scale - when building software defined infrastructure. In his session at 16th Cloud Expo, Boyan Ivanov, CEO of StorPool, will provide some practical insights on what, how and why when implementing "software-defined" in the datacenter.
SYS-CON Media announced today that @ThingsExpo Blog launched with 7,788 original stories. @ThingsExpo Blog offers top articles, news stories, and blog posts from the world's well-known experts and guarantees better exposure for its authors than any other publication. @ThingsExpo Blog can be bookmarked. The Internet of Things (IoT) is the most profound change in personal and enterprise IT since the creation of the Worldwide Web more than 20 years ago.
The world's leading Cloud event, Cloud Expo has launched Microservices Journal on the SYS-CON.com portal, featuring over 19,000 original articles, news stories, features, and blog entries. DevOps Journal is focused on this critical enterprise IT topic in the world of cloud computing. Microservices Journal offers top articles, news stories, and blog posts from the world's well-known experts and guarantees better exposure for its authors than any other publication. Follow new article posts on Twitter at @MicroservicesE