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1. #Xamarin studio entity framework how to#
2. #Xamarin studio entity framework install#
3. #Xamarin studio entity framework android#

If not, I suggest you get familiar with them first. NET Core tools EntityFramework Core, and all other tools needed to develop a Xamarin Forms app. Note: I assume that you have basic knowledge and have installed the.

#Xamarin studio entity framework how to#

In this article we will explain in a step-by-step tutorial how to set up a Xamarin Forms App with a SQLite local storage, and we are going to use EntityFramework Core to generate a Code-First Database and apply that migration to our app. Now it is possible to use EntityFramework Core to generate a local storage for our Xamarin Applications. NET Core and EntityFramework Core a new possibility arose when it comes to data persistence. Meworks//Versions/10.4.0.114/src/mono/mcs/class/dlr/Runtime/Microsoft.Dynamic/Interpreter/LightCompiler.Data persistence plays a big role in almost every application there is. > System.NotImplementedException: Interpreter of ref typesĪt .CompileMethodCallExpression ( expr) in /Library/Frameworks//Versions/10.4.0.114/src/mono/mcs/class/dlr/Runtime/Microsoft.Dynamic/Interpreter/LightCompiler.cs:1283Īt .CompileNoLabelPush ( expr) in /Library/Frameworks//Versions/10.4.0.114/src/mono/mcs/class/dlr/Runtime/Microsoft.Dynamic/Interpreter/LightCompiler.cs:1642Īt .Compile ( expr) in /Library/Fra > : Exception has been thrown by the target of an invocation. : Exception has been thrown by the target of an invocation. To use EF Core 2.0 you need at least Mono 5.2, hence you need to ensure you have installed Visual Studio 15.3 or higher. If you run any Mono Version lower than 5.0, you will get the following error, in iOS, if using an older version of EF Core. NET Standard 2.0 in UWP is still in the works, hence you must wait for that support, and then UWP will work with EFCore 2.0. EFCore 2.0 with Mono 5.0+ will work on all platforms except UWP. Note: EFCore 1.0 with Mono 5.0+ will work on all platforms. OptionsBuilder.UseSqlite($"Filename=) Īnd then if you run the project on Android, UWP or iOS, will you see. Protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) Public DatabaseContext(string databasePath)

All you need to do, is create a class, and if you want a primary key, or other attributes, add them as appropriate. I add it just before the (), in the AppDelegate.cs SQLitePCL.Batteries_V2.Init() Database Setupįirst you want to create the Tables, for your database. IOS complains on startup, if you don’t add the following line. Var dbPath = Path.Combine(Environment.GetFolderPath(), ".", "Library", "exrin.db") Var dbPath = Path.Combine(.LocalFolder.Path, "exrin.db") Var dbPath = Path.Combine(Environment.GetFolderPath(), "exrin.db")

For simplicity sake, I will just pass this through the constructor of the App.cs. You will need to pass this value into the class library, and that approach is up to your existing architecture. This is slightly different in each platform. Native Project SetupĪll you need to do in each platform, is get the path to the SQLite database. It’s easier to wipe them all out and add them again, rather than manually doing it.

Now reload your project, and add back in your Nuget packages and references. $(PackageTargetFallback) portable-win+net45+wp8+win81+wpa8 Delete everything inside, and replace it with this. NET Standard Library, is to edit the csproj of this PCL. If you have a PCL, a quick way to convert it to a. Note: Do NOT add the SQLite extension in UWP, this is not needed with EF Core and will cause a conflict, if added. I have an example repo, EFXamarin on GitHub if you want to see a completed solution.

#Xamarin studio entity framework install#

It will install all other required dependencies, as appropriate.

Install in every project, the traditional and the class library. NET Core SDK 2.0 installed, and your class library must be set to use. For those coming from server or desktop development, this will mean a very easy transition to mobile database development.

#Xamarin studio entity framework android#

With the release of Entity Framework Core 2.0, you can now run EF with a SQLite database on iOS, Android and UWP.