Tools & Apps

The power of Lightswitch - eyeQuu

Submitted by Robert MacLean on Wed, 09/26/2012 - 09:13

HiringI was recently contacted by Thabo Letsoalo of eyeQuu, a South African software start-up, who has produced a SaaS (software as a service) offering built on top of Windows Azure & LightSwitch! The solution is a full work management tool, including task management & project management features! I am not going into too much detail here because the website does it far better than I can.

I often talk about LightSwitch and why it is perfect for many situations and this is a great example of a number of those situations:

  • It shows what is possible with LS, besides all the form stuff there is plenty of interesting systems like charts!
  • It shows off using LS as the basis for building a business. I think this is a really great LS feature because rather than being stuck into thousand of hours of development and ignoring growing the business, LS enables you to have more time to grow the business since it handles a lot of the development for you!
  • I love the fact it uses Azure, showing the power of the cloud, which allows it to offer a true multi-tenant service, scale massively and maintain the costs of a start-up all at the same time!

I really urge you to go and have a look at Thabo’s fantastic site!

Where do I start to learn Windows 8?

Submitted by Robert MacLean on Tue, 07/03/2012 - 10:11

I have been asked at the talks I do, where can I go to learn Windows 8? What material is available? There is a LOT of content available for Windows 8. For me personally I learnt initially from the Windows 8 Camp in a box and building my own test apps. However the ever amazing Bruce Nicholson provided me with a fantastic list recently (so go thank him):

Who can see my tweets to a friend?

Submitted by Robert MacLean on Tue, 06/19/2012 - 18:12

A while ago I wrote a post about an interesting Twitter behaviour – if you start a tweet with an @<username> only people who follow you & that person can see the tweet (if you unsure see the post which explains it). The question I had today was to find out who is in that list – or put who follows us both on Twitter?

Oddly, I could not find anything (besides some tools that cost money) to do this?! So I built my own awesome little tester you can use below:

First username
Second username

    For the developers among you who want to see how this all works? Check it out on bitbucket: https://bitbucket.org/rmaclean/twittercoalesce

    Known issues:

    • My website uses an older version of jQuery, and I use a newer one in this code. If the loading gives an error or gets stuck on the screen, try refreshing the page (seems to solve it).
    • If you have too many people shared between the two names - it will break. I am looking into how to solve this. If this happens - loading will get stuck :|
    • Twitter limits clients to 150 calls per hour. If the rate limit is exceeded the loading will get stuck.

    Lightswitch & the HTML Client - what does this mean?

    Submitted by Robert MacLean on Thu, 06/14/2012 - 14:56

    Lightswitch Recap

    For you to understand the rest of this post it is vital you have a high level understanding of Lightswitch and how it works. Lightswitch is a RAPID development platform from Microsoft that makes development of line of business (LOB) apps really easy. The team at Microsoft often talk about citizen developers – i.e. people who are not full time developers, but are the “IT guy” in the department or company that need to put together a great looking solution. The team also talk about no-code solutions – where you can build great systems without code.

    imageBoth statements from the team are true and false at the same time. Sure your accountant can build a CRM system with no code in Lightswitch, but Lightswitches true value is that it is a professional development tool, and in reality unless it is a really simple solution you will need a touch of code.

    What is great is that Lightswitch allows the citizen developer to write a system that can be matured by professional developers later on – it’s power is that it does not lock you into being too simple or too complex a development system.

    For me the value proposition is that you get REAL rapid development, that citizen developers can put together and extend solutions that are well architected and that when the need is there a professional developer can extend that solution and hand it back over to the citizen developer – it is the circle of Lightswitch.

    Architecture

    When you craft a (avoiding the development term here on purpose) Lightswitch create a multi-tier architecture, that is either two tier (client & database) or three tier (client, server & database). Two tier is really three tier but the server & client are just one package.

    The database can be any support by Lightswitch, the middle tier is OData and the front end is Silverlight. The choice of front end has recently hurt Lightswitch because Silverlight is dying. However if you step back for a second and think about it Lightswitch provides the easiest and fastest way to build a complete (and I mean complete, authentication, methods, proper designed) OData solution… you could always ignore the client portion and build on top of the OData server.

    Making a HTML Client

    The HTML client mode for Lightswitch is a recently announced new feature that allows you to build a client that runs in a browser, and not just Internet Explorer on Windows (Dynamics CRM I am looking at your shameful behaviour) but pretty much any browser, say on an iPad:

    Deployed app on ipad -1

    This is possible because of two things, the OData server which allows really any technology to connect to it, and the second piece of the Lightswitch system the LSML file.

    I hope you have never heard of the LSML file, as it is not a nice place to go to – it is a MASSIVE (even simple demo’s I build are thousands of lines) XML file that stores ALL of the Lightswitch system in a “Lightswitch domain language”. This enables the team to take that information, parse it and produce output based on it. So the concept of producing a parser that creates HTML rather than Silverlight is really simple… just build the parser.

    What do we know about this HTML client so far?

    It is early days, in fact there are no bits available yet, but we do know some things from the demo’s and screen shots that are available.

    • Multiple themes will be supported (their is a dark & a light at least) – thanks to the jQuery Mobile that powers it.
    • It is a separate client – so you will have a Silverlight experience and then also have the HTML experience added in.
    • It follows the true Lightswitch model of being easy to build with no code, but if you need that little extra, the JavaScript can be edited.

    Light theme - 2Dark theme -  2imageCustomizing UI with JavaScript

    The Important Two Issues

    To wrap this up it is a very exciting point in time for the Lightswitch world with so much happening that I think it is important to take a step back and find a few key aspects about this amazing feature that will help position it. There are two that really stand out to me from all the announcements:

    Separate Client

    This is not a Silverlight to HTML generator – it is separate. This means that awesome Silverlight chart you use today will not magically work in the HTML client. This has both advantages and disadvantages, but if you think about the dying of Silverlight I am very glad that they have a whole new growth path.

    It also allows for the real scenario of supporting a rich experience in Silverlight in a company (where we control all the machines and know we can run Silverlight for a long time still) and having a mobile or companion experience in HTML for those people on the road. Sure they do not get the great sales forecast chart but they can still capture their sales on their iPad.

    Web Developers

    A recent did an survey of app developers looked at what they are building today, what they were building and what they intend to build in the future (future = one year in this survey). Interestingly there are only TWO platforms that are getting growth in the future? HTML & Windows Phone. Android, iPhone and many others are all expected to decline.

    If you think about those numbers and add in the MASSIVE investments in HTML development that are in Windows 8, it should not surprise you that web development is a MAJOR area in the future of all developers. It also means that web developers can start to have way more opportunities in the market outside of building websites & portals, and that is very exciting as that little garage web designer company today could be a major line of business developer in a few years.

    Visual Studio Extension Manager Error 417

    Submitted by Robert MacLean on Thu, 06/07/2012 - 08:54

    imageWith Visual Studio 2012 there is an increase importance placed on the Extension Manager component, not only does it provide a great integrated experience to the Visual Studio gallery for downloading and updating extensions but it will also be used to delivery updates for Visual Studio itself!

    At work it would constantly fail to work with error 417 – expectation failed, so working with our facilities team we were able to identify the problem as an issue with the proxy server we use, Squid.

    Squid seems unable to handle the HTTP status code 100, and will then fail with the error 417. To solve this you simple need to add the following to your squid.conf file: ignore_expect_100 on

    South African Postal Codes for Windows Phone

    Submitted by Robert MacLean on Tue, 04/17/2012 - 06:34

    1I can NEVER EVER remember the postal code for where I work or where I live – that little four digit number just eludes my brain. So to solve that I thought, why can’t I have EVERY postal code with me always? So that is what I made happen with this simple Windows Phone application: Postal codes!

    It is dog simple: one input the name of what you want then hit search and boom results. It includes both street and box codes Smile

    For the developers out there, this application source code is available too at: https://bitbucket.org/rmaclean/postal-codes

    IntelliTrace vs. PreEmptive Analytics

    Submitted by Robert MacLean on Fri, 03/30/2012 - 14:19

    IntelliTrace

    Visual Studio 2010 introduced an amazing feature: IntelliTrace which allows for deep debugging experiences inside Visual Studio by collecting an AMAZING amount of information (basically a stack trace for every call in your code + meta data) and allowing you to use it later to replay the way the application was used. With this feature you could eliminate those “No Repro” bugs! The catch in 2010 was it was NOT allowed to be used in production. In Visual Studio 11 that has changed and we can use it in production: http://msdn.microsoft.com/en-us/library/hh398365(v=vs.110).aspx & http://msdn.microsoft.com/en-us/hh440472

    PreEmptive Analytics

    This change in licensing may seem to put IntelliTrace in direct competition with another great tool, PreEmptive Analytics (PA). I have mentioned this amazing tool before and with Visual Studio 11 it is included “in the box” so there seems to be a conflict brewing – but there isn’t.

    Two sides of the same coin

    These two tools are both part of the collect information so you can react to it later and fix bugs set of tools, but they have very different use cases. IntelliTrace is specific to the scenario of replaying an application for diagnosis and debugging purposes. It is not meant to be an always on tool and it is a tool that writes to a local file that needs to be collected some how.

    PA on the other hand is a tool to always have on, it does capture error information but nothing more than the simple Exception + Stack which is not as useful, detailed or integrated into VS when compared to IntelliTrace. In addition PA allows me to do a lot of a lot of analytics on my application that are not possible in IntelliTrace:

    • what features are people using
    • where in the world are they
    • when are they using it
    • what are their machines like

    In addition the PA reports get automatically sent to a server (that they run or that you can run if you have privacy/security concerns) so there is not need to waddle around collecting files.

    I can also see scenarios that these two work hand in hand – PreEmptive getting higher level info that shows a lot of users having issue X, then the support guys contact some users and do a more detailed capture of the issue with IntelliTrace.

    Important changes to Express Editions of Visual Studio "11"

    Submitted by Robert MacLean on Wed, 02/29/2012 - 19:34

    manualtrafficexchangetipNote: The source of this is the Visual Studio “11” beta Product Guide (http://go.microsoft.com/fwlink/?linkid=243994) so this may change by release.

    Today we have five Express products: C++, C#, Visual Basic, Web and Phone however with the launch of Visual Studio “11” we will only have TWO!

    These two editions of Express we will have are Web & Windows. I do not believe we will only ever have two editions, as the 2010 Express editions grew during the product so I would expect a few new ones coming along post launch.

    So how does the old Express editions map to the new Express editions?

    • C++ maps to NOTHING
    • C# for WinForm/WPF/Silverlight maps to NOTHING
    • VB for WinForm/WPF/Silverlight maps to NOTHING
    • Phone maps to NOTHING
    • Web maps to Web

    Let me reiterate this, if you want to build non-Metro applications (unless they are web) there is NO Express edition anymore for this! The Windows Express edition ONLY allows the building of Metro apps (including ARM). Web dev using Express editions still continue to work as before.

    Both Express editions have a new enhancements too, which is a fantastic thing: The ability Version Control & Work Item Tracking with TFS is included out of the box.

    For the Windows express edition it has even more enhancements

    • A subset of static analysis (fxCop) for helping developers pass Win Store evaluation
    • Performance Profiling has been added: CPU Sampling for C#/VB/C++ Metro apps and Instrumentation for HTML/JS Metro Apps

    Stop/Important image from http://sitechoppers.com/why-it-is-important-to-build-your-downline/

    Presentation Dump - End 2011: Azure, Windows 8, Lightswitch, Visual Studio Tools, TFS & Roslyn

    Submitted by Robert MacLean on Wed, 01/04/2012 - 08:54

    With 2011 finally done and dusted it is time for the bi-annual presentation dump, where I upload most of the slides I have done in the last six months to share with you! I say most, as some presentations are NDA and those, unfortunately, I can’t share out – but where I can upload slides I do!

    In this presentation dump we have:

    • Windows Azure Platform Overview: This is a talk I gave at the ImagineCup to faculty members about what Microsoft Azure can offer!
    • Windows 8: A brief introduction shortly after the //Build conference to help share what information we had on Windows 8
    • Lightswitch: The latest iteration of my Lightswitch talk contains a structure overview before the demo and then goes into detail on the themes and extension model in the product.
    • Developer Productivity Tools: A session that looks at FIVE FREE tools for Visual Studio that will assist in the productivity of any Microsoft .NET developer in Visual Studio. Tools covered are fxCop, StyleCop, Pro Power Tools, CodeRush Xpress & Nuget.
    • An Introduction to TFS: The target audience for this is someone or company who is using another source control (like VSS) and is thinking about moving to TFS but isn’t sure where to start. This BRIEF introduction tries to provide a high level view that TFS is not just source control it is a LOT of more and thus has a lot more power. It also mentions migration from VSS and provides guidance for success.
    • Roslyn: This is an early look at Roslyn

    It is definitely a quieter period than most, in terms of number of unique slide shows and I think a lot of that comes out of the information black out from Microsoft prior to //Build, but it was still a very period with me presenting Lightswitch NUMEROUS times and also Tech·Ed Africa where I did four presentations!

    You can get all the slides and details by clicking “read more” below!

    Windows Azure Platform Overview

    Windows 8

    Lightswitch

    Developer Productivity Tools

    An Introduction To TFS

    Roslyn

    Portal 2: Lab Rat

    Submitted by Robert MacLean on Wed, 12/21/2011 - 10:28

    If you do not know what Portal is, then you are dead to me! DEAD! But since I know everyone knows of Portal that won’t be an issue. What you may not have known is that Valve created a comic book that chronicles the gap between the end of Portal 1 and the beginning of Portal 2, and your character (Chell) ends up back inside the facility.

    This comic is called Lab Rat and you can view it in super great details at http://www.thinkwithportals.com/comic/

    But what about when you are travelling this festive season and want to read it quickly, or show your family so they can be caught up before you take them through Portal 2 on Christmas day? Well, for my seventh WP7 app (yes, I have build 7 Windows Phone apps this year!) let me introduce Lab Rat.

    In addition to offering the comic in your pocket you can save any page, with or without text, to your phone for use as a login screen or any such thing! AWESOME!

    In no way should you think this is an alternative to going online though, the detail of this comic should be seen at the BEST resolution possible – but this makes a good companion experience.

    screenshot-v1.0_12-9-2011_14.18.5.10screenshot-v1.0_12-9-2011_14.18.8.170screenshot-v1.0_12-9-2011_14.18.27.813screenshot-v1.0_12-9-2011_14.18.29.695