![]() With version Core 2.0 all platforms Android, iOS and UWP (uwp soon) are supported so I decided to write this blog post. First time I seen EF was in ASPNET MVC and I fall in love with it, now when I am also very active in Xamarin Development, Entity Framework is something that I miss from my ASP.NET dev "world". The OnAppearing function of returns all Blog records and stores them into a List variable.I am very exiced to write this blog post.The following are some instances in the app where EF Core is used to access SQLite. The OnConfiguring function sets up the location of the SQLite database on the physical device.The SQLitePCL.Batteries_V2.Init() is needed in the constructor to initiate SQLite on iOS.Both properties in this class of type DbSet are used to operate on the underlying tables representing Blogs and Posts.A DbContext is used to group together database queries and changes. The BloggingContext class is located in the Services folder and inherits from the EF Core DbContext class. The BlogId and Blog properties relate back to the parent Blog object for the instance of the Post. The Posts property defines a parent-child relationship between Blog and Post. The model classes are composed only of properties, which model columns in the database. In this sample, two classes are used: Blog and Post which can be found in the Models folder. The following NuGet package is needed in each of the projects in the Xamarin.Forms solution.Įach table in the SQLite database accessed through EF Core is modeled in a class. To create Xamarin.Forms apps with EF Core, you install the package for the EF Core database provider(s) you want to target into all of the projects in the Xamarin.Forms solution. (This approach isn't ideal as it may result in rejection from the store). This article explains more about the Xamarin.iOS linker including how to set the behavior on Xamarin.iOS. Alternatively set the Xamarin.iOS Linker behavior to Don't Link in the iOS Build options.The first is to add -linkskip System.Core to the Additional mtouch arguments in the iOS Build options.It is assumed that you are familiar with the Xamarin.Forms topics of displaying data and navigating between pages.Įntity Framework Core uses reflection to invoke functions which the Xamarin.iOS linker may strip out while in Release mode configurations. ![]() The following sections will walk you through the code in the sample project that reads, creates, updates, and deletes data from a SQLite database using EF Core with Xamarin.Forms. All blogs and their corresponding posts will then be deleted from the app's SQLite database. The new post will be associated to the blog post you clicked on in a previous step and will save to the app's SQLite database and show in the list. You can click on one of the blog entries in the list and see any posts for that blog.Ī page then appears that allows you to fill out information about a new blog post.įill out all the information and click Save in the toolbar. The new blog will save to the app's SQLite database and will show in the list. When the app first starts, it will populate the local SQLite database with two entries representing blogs.Ī new page will appear that allows you to enter information about a new blog.įill out all the info and click Save from the toolbar. Once downloaded, open the solution file EFGettingStarted.sln in Visual Studio or Visual Studio for Mac and run the application on the platform of your choice. To run and explore this sample application, download the code on GitHub. This documentation provides detailed step-by-step installation instructions for each platform. Visual Studio 2019 version 16.3 or later with this workload:.You can view this article's sample on GitHub. ![]() ![]() You can follow the tutorial by using Visual Studio on Windows or Visual Studio for Mac. In this tutorial, you create a Xamarin.Forms application that performs data access against a SQLite database using Entity Framework Core. ![]()
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