Random writings, thoughts, tools, and ideas....

Coming Soon, an awesome WP7 event!

Update: Details of the event are up at now & Registration is open - GO!

Microsoft is planning in the next few weeks a series of WP7 training events kicking off with a one day event! This event will have a presentation track where you will see a number of topics (see proposed list below) and a lab track where you can build your apps with expert guidance! This is the perfect chance to take that idea to reality and it is possible (I challenged myself to build two apps in 6 hours a few weeks back, and succeeded!).

Keep an eye on my blog or Microsoft South Africa DPE team blog!

PROPOSED Topics:

•  Introduction to Windows Phone
•  Building a Silverlight Application
•  Silverlight Controls for the Phone
•  Advanced Silverlight topics
•  Windows Phone Hardware
•  Services
•  Performance
•  Getting your app onto the Marketplace
•  Building Windows Phone XNA Applications
•  Advanced XNA Topics

Following that event will be a series evening classes where there will be a presentation, a real WP7 dev talking about their app and a Q&A session! So lots of good things coming!

Welcome to Mzanzi!

(for non-South Africans Mzanzi is a townshup slang word for ‘South’ or ‘South Africa’)

With the upcoming Mango release, South Africa will be supported with the Marketplace (finally!). Microsoft have summarised this very nicely below. Before you get to that, take a look at a recent post from Rudi Grobler, where he talks about South African relevant apps that exist today!

Johannesburg, South Africa – 24 August 2011 – Microsoft has announced a series of brand-new enhancements to its App Hub developer portal as part of the highly anticipated ‘Mango’ release. Windows Phone 7 developers can now publish their apps to consumers in 19 new countries, including South Africa. In addition to the 16 countries where Marketplace is already supported, developers can now broaden their opportunity for global distribution and competitive app prices.

Clifford de Wit, developer platform lead at Microsoft South Africa, is calling on all Windows Phone developers to submit Mango apps in August, ahead of the Mango release to market. The new App Hub developer portal allows developers to manage their account, change settings, submit applications and stay up-to-date on Windows Phone.

“The updated App Hub features enhancements such as greater geographic markets for developers, consumers and advertising coverage; new private distribution options; and enhanced application and account management capabilities. We’re making great strides in expanding overall demand for Windows Phone applications.”

Microsoft is offering developers two new private distribution options: beta and targeted distribution. Apps distributed through these private distribution methods can only be downloaded by users using a deep-link and the apps cannot be discovered via browsing or searching in Windows Phone Marketplace. Beta distribution enables developers to distribute pre-certified apps to a group of up to 100 access-controlled beta testers for up to 90 days. The targeted distribution enables developers to distribute applications through Marketplace in a hidden state, where they are not discoverable via browsing or searching Marketplace.

De Wit says he has no doubt that local developers are in a position to create compelling mobile content for the Windows Phone platform. “We want to attract a new wave of Windows Phone developers ahead of the ‘Mango’ release.”

Other enhancements to the Mango App Hub include better application management, an enhanced developer dashboard, more detailed reporting, a new “Crash Count” report, a streamlined application submission process and new application categories – education, kids & family, and government and politics.

For more information, visit the official Windows Phone Blog and the App Hub.

Last year I wrote two posts (finding the best talks at Tech·Ed & why is the Tech·Ed calendar is awesome) which really aimed to help improve your Tech·Ed Africa experience. They are both still relevant this year but I thought of one new tip to share and that is related to travel.

Short version: Book your inbound flight EARLY, your outbound flight LATE and stay at the HILTON.

Why inbound early?

Day 1 is a busy day for you – after you land you need to find the shuttle from the airport to the conference venue. I got separated from the group and lost in the airport last year . Once you are at the conference venue you need to register and get your swag (do this before you go to the hotel) then you need to find the bus to get to your hotel, if you follow the tip below about the Hilton this is easy else you may have a small wait. Once at your hotel, check-in, sort out stuff, see what the swag is etc… and then finally find the bus (wait) and get back to the conference venue for the keynote & opening party. In short – it is a VERY BUSY DAY, so having an extra hour or two helps.

For speakers there is also the advantage of taking that extra hour or two you can get to do a quick tech check the day before and help calm those nerves.

Why outbound late?

The last day ends with the closing keynote and those can run long – I have seen people RUN for the busses and have to drag luggage around with them in the closing because of time constraints. Plus when you get to the first few busses you have the fight for bus space! It really just messes with the last day, rather take a later flight which means you do not need to fight for bus seats or rush around.

Why the Hilton?

The Hilton in Durban is the best place to stay, as it is RIGHT next door to the ICC where Tech·Ed is held. In fact the picture to the left, the bottom left hand corner is the ICC. You don’t even have to cross a road!

So it means getting up later, staying out later (Hilton bar is famous for after parties), it means being where all the Microsoft staff, media & presenters are (great for those informal discussions in the elevator) and generally a top end experience.

Big issue, it sells out FAST so you should be booking NOW!

Follow these travel tips and you will be on your way for a great Tech·Ed!

In Windows Phone 7 there are two ways to store values State & IsolatedStorageSettings which have their various pro’s and con’s. I prefer to use the IsolatedStorageSettings for most scenarios but this tip will apply to both, so when you see the code referring to one it will work on both.

Very simply the first setting you should store is one called version (or similar) and should have a version indicator. In short it tells you what version of the settings you are working with!

IsolatedStorageSettings.ApplicationSettings["version"] = "1";

Having this field has two advantages for you, first it gives you a very simple way to check if you have settings available & if it is not, then your app is running for the first time.:

if (IsolatedStorageSettings.ApplicationSettings.Contains("version"))
{
    // do something with settings
}

The other advantage is that when you update your application you can upgrade settings easily. 

if (IsolatedStorageSettings.ApplicationSettings.Contains("version"))
{
    switch ((int)IsolatedStorageSettings.ApplicationSettings["version"])
    {
        case 1:
        {
            // upgrade version setting and add missing settings or change existing settings
            break;
        }
        case 2:
        {
            // normal reading of settings
            break;
        }
    }
}

Even if you never use it for upgrades, at least it is there for a simple check and if one day you need it - you are ready to go!

In my ever growing list of Windows Phone 7 apps I introduce you to the latest one, a cricket run rate toolset!

This is another calculator type that allows you to work out cricket run rates, projected scores at the current run rate and also projected scores if the run rate changes to 4, 5 or 6 runs per over!

The second screen is the compete screen which allows you to put in the score of the first batting side and then see if the chasing team is at, above or below the run rate needed to catch them and what run rate is needed!

It’s a very nice and simple tool to have in your toolbox for cricket fans!

I was put onto this interesting feature of Twitter by Scott Hanselman, where needs repeating. When you use Twitter to send a tweet all of your followers will get it, unless when you start the tweet with a name (called an @ reply). For example:

The above tweet would have been seen by everyone who follows me!

This second tweet starts with William Branders name, so only people who follow BOTH of us will see it. In other words, it is only that group in the middle of the following Venn chart which will see that tweet!

So how can you send a tweet starting with someone's name & have all of your followers see it? Start the tweet with a dot, like in the example below.

A final important to note about starting a tweet with a name, those tweets are still public. Even though your followers don't automatically see them, they could just browse to the Twitter website and find them their. If you want a tweet that is private, you a direct message

If you walk into any store to buy a game or movie you will find a little blue triangle sticker which contains the age restriction from the Film and Publications Board who review and rate content.

Since I created a game recently I decided to see what the process is for classification of a game is and learnt some very interesting things for developers.

Put simply only games/films that are sold or hired require to be classified – so if you are developing a game/films that will be available for FREE then you do not require classification! Below is the email from the head of the classification unit confirming that!

GREAT NEWS for hobbyist developers!

If you do plan to sell your game then you need to complete the forms on the website (game submission form), provide a disc with screenshots and videos of your game, a game synopsis and pay the registration fee (currently R1 508.64) and then wait for the classification.

Microsoft have confirmed & I have tested that the forced requirement for the FPB certification in the marketplace no longer exists. You can submit a certification but you are not forced to. Only downside at the moment is Window Phone 7 – when you submit a game for the South African market regardless of price they require the certification which is incorrect. I have submitted a request to Microsoft for details on this and will update you as soon as I have any information.

Community Night, the best way to meet, mingle and learn (if you don’t know about it – read here) happens on the second Tuesday of the month… except in September due to an event at the venue on the Tuesday which can’t be moved.

So for September it will take place the Monday before, in other words Monday the 12th September. Please help get the word out to the various user groups and communities!

See you there!

This past weekend I had the opportunity to present at a fantastic event, Dev4Devs which is a free event where anyone can present on anything (software developer related) for 20min. It is a lot of fun, because of the variety of talks, the variety of people (some new speakers and some experiences speakers) and the HORRID 20min timeline.

This time I presented on a topic I am very interested in, Codename: Roslyn which is the next version of the C# & VB.NET compilers which are fully managed code (C# one written in C# and the VB.NET one written in VB.NET).

Since there is no public bits available I made use of the compiler from Project Mono – which has had similar things (the REPL environment and hosted compiler) for years.

As with all presentations here (or at the end of the post) are my slides, demo notes, demo files and other info!

During my research and prep, I found a bunch of interesting posts and information about it so here is the info I found. I’ve bolded the ones I think are especially interesting.

• http://stackoverflow.com/questions/4222524/what-would-you-do-with-compiler-as-a-service
• http://codebetter.com/patricksmacchia/2010/05/31/c-5-and-meta-programming/
• http://research.microsoft.com/en-us/events/fs2011
• http://social.msdn.microsoft.com/Forums/en-US/async/thread/03a51936-b4fd-4814-9161-46544eda63cf/
• http://blogs.msdn.com/b/ericlippert/archive/2010/12/16/hiring-for-roslyn.aspx
• http://blog.functionalfun.net/2008/10/dynamic-future-of-c-40.html
• http://channel9.msdn.com/Shows/Checking-In-with-Erik-Meijer/Checking-In-Eric-Lippert-On-Compiler-Evolution-Designing-C-and-Blogging
• http://castroller.com/Podcasts/NetRocks/2230612-Eric%20Lippert%20Talks%20About%20Project%20Roslyn
• http://channel9.msdn.com/Shows/Going+Deep/Anders-Hejlsberg-Questions-and-Answers
• http://blogs.msdn.com/b/lisa/archive/2011/03/29/teched-middle-east-2011.aspx
• http://www.mono-project.com/CsharpRepl

Image from Ezu

16 November 2011: This application has had a major update, see the details in this post

Following the same idea as my AA Rate WP7 app, another very popular spreadsheet I built is one that verifies South African ID Numbers so I also decided to build a Windows Phone 7 app to do that.

This does a little more than the spreadsheet could, so it has lots of info about what in an ID number does not verify which is very useful.

In addition it includes a awesome new feature a South African ID Number GENERATOR! With this you put in a few required details, hit a button and BOOM! An ID number that will validate.

Important to remember that validation of a number doesn’t mean it actually exists, just the math works. So please don’t use this for anything except interest or development!

(btw screenshots are from 1.1, which is soon to be out – so if you download and it looks different then give it a day or two)

16 November 2011: This application has had a major update, see the details in this post

One of the most popular posts on my website is the AA Rate calculation spreadsheet I built in 2008. The goal of the spreadsheet is you provide the details about your vehicle and it tells you what the AA Rate for your vehicle is. So I decided to rebuild this for Windows Phone 7!

This was a lot of fun because it has some complex issues (matrixes of values) which had to be solved, so that tickled my developer brain.

This also allowed me the opportunity to update the calculations since they change every so often which is important for you!

An interesting thing that I learnt with this release is that the official/documented calculations is NOT equal to what the AA online calculator does. So there is an option now called “quirks mode” which runs it equal to the online calculator where if you turn it off, it runs it using the documented mode!