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Porting a Xamarin Windows 8 Application to the Windows 10 SDK

I am trying to run one of the examples from this site .

Problem: The projects were made for Windows 8. When I open the solution in Visual Studio, it tells me that I need to install the Windows 8 SDK to continue.

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I am using the Windows 10 SDK now and I will no longer use the SDK 8, so I would prefer not to install this SDK and use a new one. Can I transfer this project to a Windows 10 application in any way?

What it looks like right now:

enter image description here

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Yes, porting is possible. I would suggest creating a new project in this solution (most of the solutions of this git already added UWP support, as I saw) and redid most of the things. In some projects using platform-specific code, this port may not work, as some APIs have changed from WP8 to UWP - as you probably know.

After this procedure, I still had problems - I did not have a working .appxmanifest file, so I can not create a .pfx file. This warns you that the certifcate file is missing.

I'm not sure if all the steps are needed. I leave it as homework;)

In any case, here I will show you the steps to transfer the TodoREST project to UWP:

  • Unloading an iOS and Droid project will simplify
  • Remove all nuget packages from Portable and WinPhone81
  • Change the portable class profile to Profile111 (uncheck WP8 Silverlight as the target)
  • Now you can reinstall Xamarin.Forms and Newtonsoft.Json on the portable project (deletion was necessary to change the profile - which was necessary because there were some errors).
  • Remove app.config from WinPhone81 project

  • Add the project.json file to the WinPhone81 project and add the following content:

     { "dependencies": { "Microsoft.NETCore.UniversalWindowsPlatform": "5.0.0", "Xamarin.Forms": "2.0.0.6482" }, "frameworks": { "uap10.0": { } }, "runtimes": { "win10-arm": { }, "win10-arm-aot": { }, "win10-x86": { }, "win10-x86-aot": { }, "win10-x64": { }, "win10-x64-aot": { } } }

  • Save all and close the WinPhone81 project

  • In the file explorer go to the folder and edit Package.appxmanifest

    • Exchange Package Tag:

       <Package xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10" xmlns:mp="http://schemas.microsoft.com/appx/2014/phone/manifest" xmlns:m3="http://schemas.microsoft.com/appx/manifest/uap/windows10" IgnorableNamespaces="m3 mp">

    • Delete ... and add the following instead:

       <Dependencies> <TargetDeviceFamily Name="Windows.Universal" MinVersion="10.0.0.0" MaxVersionTested="10.0.0.0"/> </Dependencies>

  • Edit TodoREST.WinPhone81.csproj:

    • First, <PropertyGroup> replace <TargetPlatformVersion> as follows:

       <TargetPlatformIdentifier>UAP</TargetPlatformIdentifier> <TargetPlatformVersion>10.0.10586.0</TargetPlatformVersion> <TargetPlatformMinVersion>10.0.10586.0</TargetPlatformMinVersion>

    • Change ProjectTypeGuids to

       <ProjectTypeGuids>{A5A43C5B-DE2A-4C0C-9213-0A381AF9435A};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>

    • On each PropertyGroup with Condition=... replace WINDOWS_PHONE_APP with DefineConstants with WINDOWS_UAP

    • Save
  • Update project in Visual Studio
  • Change MainPage.xaml and change <forms:WindowsPhonePage to <forms:WindowsPage and change the namespace to using:Xamarin.Forms.Platform.UWP (from .WinRT )
  • Here I had to restart VS2015 for some reason, as it did not notice project.json
  • Run the project and debug!

Hope this answers your questions.

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