Rockford Lhotka's Blog

Home | Lhotka.net | CSLA .NET

 Tuesday, July 01, 2014
« Xamarin.Forms has some potential | Main | Third Party Dev Tools Strike Back »

There’s been a lot of exciting change in cross-platform development for C# developers over the past few months. Microsoft introduced the Universal Apps concept for WinRT (Windows 8 and Windows Phone 8.1), and Xamarin introduced Xamarin.Forms (Windows Phone 8, Android, and iOS).

Beneath the Universal App support in Visual Studio 2013 is a broader concept called a Shared Project. With the Shared Project Reference Manager add-in for VS13 you can reference these shared projects from any project, not just Universal App projects.

As a result, you can build a solution like this one:

SharedCodeSolution

This solution includes a Xamarin.Forms MobileApp, a Microsoft Universal App (based on the Hub control), a Windows Forms app, and a WPF app. All of these apps use non-UI code from the NonUICode.Shared project.

In fact, the Android, iOS, WinPhone, Windows, and WindowsPhone UI projects have basically no code at all. In the MobileApp all the UI code is in the MobileApp1.Shared project. In the WinRTApp all the UI code is in the HubApp1.Shared project.

The Windows Forms and WPF apps each have their own UI code. Windows Forms is its own thing, and although WPF uses XAML, it is an older dialect that doesn’t share enough in common with WinRT or Xamarin.Forms for sharing.

None of the UI projects contain any business logic or logic to call services. All that code is in the NonUICode.Shared project so it can be maintained just one time. The service calls use HttpClient, which is reasonably common across all the UI platforms, and for the few differences I’m using #if statements to accommodate the per-platform code. For example, here’s a bit of code from a shared viewmodel class: 

    public async Task SaveData()
    {
      if (this.IsDataLoaded)
      {
        var webClient = new HttpClient();
        var data = JsonConvert.SerializeObject(this.Speaker);
#if ANDROID || __ANDROID__ || __IOS__
        var content = new StringContent(data, System.Text.Encoding.UTF8, "application/json");
#else
        var content = new HttpStringContent(data);
#endif
        var urlString = apiSpeakerUrl + @"/" + this.Speaker.Id.ToString();
        var response = await webClient.PutAsync(new Uri(urlString), content);
        if (!response.IsSuccessStatusCode)
          throw new Exception("SaveData failed");
      }
    }

The overall result is that with reasonable effort you can create an app that spans every type of smart client technology available today; from Windows Forms up to iOS. These apps can share all your business and service client code, and can often share a lot of UI code.

(fwiw, if you build your business logic with CSLA .NET it is a lot easier to create and maintain the shared business and service client code than if you try to build that code by hand)

CSLA .NET | WinRT | WP8 | Xamarin
Wednesday, July 02, 2014 8:31:00 AM (Central Standard Time, UTC-06:00)
This whole concept is one I would love to explore and start trying to prototype as an avenue for our own large scale CSLA application - but being so busy I'm just not ready to do so until I feel like there is some level of confidence I'll get somewhere.

Rocky, have you gotten to the point where something like "Project Tracker" or "MyVote" works in the scenario you have above?

In Xamarin.Forms, is there a way to provide custom markup of sorts such that one might end up being able to inject a generic propertystatus and have it generated appropriately in each native app?
chris
Wednesday, July 02, 2014 9:44:02 AM (Central Standard Time, UTC-06:00)
I'm working on a PropertyStatus concept for Xamarin.Forms. Their documentation is very limited so it is slow going, but yes this should be possible. My hope is to have a Csla.Xaml assembly to support Xamarin.Forms.

We do plan to update MyVote to use some or all of these concepts for Modern Apps Live in Orlando.

I'll probably update Project Tracker too, but right now I'm working with a different project as I learn the ins and outs of this technology.
Tuesday, July 08, 2014 1:19:11 PM (Central Standard Time, UTC-06:00)
Once you get to a comfortable point with this, it would be great to see a Using e-book covering this multi-platform scenario.
Tim
Comments are closed.
On this page....
Search
Archives
Feed your aggregator (RSS 2.0)
October, 2014 (1)
August, 2014 (2)
July, 2014 (3)
June, 2014 (4)
May, 2014 (2)
April, 2014 (6)
March, 2014 (4)
February, 2014 (4)
January, 2014 (2)
December, 2013 (3)
October, 2013 (3)
August, 2013 (5)
July, 2013 (2)
May, 2013 (3)
April, 2013 (2)
March, 2013 (3)
February, 2013 (7)
January, 2013 (4)
December, 2012 (3)
November, 2012 (3)
October, 2012 (7)
September, 2012 (1)
August, 2012 (4)
July, 2012 (3)
June, 2012 (5)
May, 2012 (4)
April, 2012 (6)
March, 2012 (10)
February, 2012 (2)
January, 2012 (2)
December, 2011 (4)
November, 2011 (6)
October, 2011 (14)
September, 2011 (5)
August, 2011 (3)
June, 2011 (2)
May, 2011 (1)
April, 2011 (3)
March, 2011 (6)
February, 2011 (3)
January, 2011 (6)
December, 2010 (3)
November, 2010 (8)
October, 2010 (6)
September, 2010 (6)
August, 2010 (7)
July, 2010 (8)
June, 2010 (6)
May, 2010 (8)
April, 2010 (13)
March, 2010 (7)
February, 2010 (5)
January, 2010 (9)
December, 2009 (6)
November, 2009 (8)
October, 2009 (11)
September, 2009 (5)
August, 2009 (5)
July, 2009 (10)
June, 2009 (5)
May, 2009 (7)
April, 2009 (7)
March, 2009 (11)
February, 2009 (6)
January, 2009 (9)
December, 2008 (5)
November, 2008 (4)
October, 2008 (7)
September, 2008 (8)
August, 2008 (11)
July, 2008 (11)
June, 2008 (10)
May, 2008 (6)
April, 2008 (8)
March, 2008 (9)
February, 2008 (6)
January, 2008 (6)
December, 2007 (6)
November, 2007 (9)
October, 2007 (7)
September, 2007 (5)
August, 2007 (8)
July, 2007 (6)
June, 2007 (8)
May, 2007 (7)
April, 2007 (9)
March, 2007 (8)
February, 2007 (5)
January, 2007 (9)
December, 2006 (4)
November, 2006 (3)
October, 2006 (4)
September, 2006 (9)
August, 2006 (4)
July, 2006 (9)
June, 2006 (4)
May, 2006 (10)
April, 2006 (4)
March, 2006 (11)
February, 2006 (3)
January, 2006 (13)
December, 2005 (6)
November, 2005 (7)
October, 2005 (4)
September, 2005 (9)
August, 2005 (6)
July, 2005 (7)
June, 2005 (5)
May, 2005 (4)
April, 2005 (7)
March, 2005 (16)
February, 2005 (17)
January, 2005 (17)
December, 2004 (13)
November, 2004 (7)
October, 2004 (14)
September, 2004 (11)
August, 2004 (7)
July, 2004 (3)
June, 2004 (6)
May, 2004 (3)
April, 2004 (2)
March, 2004 (1)
February, 2004 (5)
Categories
About

Powered by: newtelligence dasBlog 2.0.7226.0

Disclaimer
The opinions expressed herein are my own personal opinions and do not represent my employer's view in any way.

© Copyright 2014, Marimer LLC

Send mail to the author(s) E-mail



Sign In