entity-framework-core

问题 I noticed that it is possible to disable tracking in three different ways: via AsNoTracking on context properties via AsNoTracking on the final query before executing it via context.ChangeTracker.QueryTrackingBehavior Is there any difference between these three approaches if I want to disable tracking for everything? If I previously used AsNoTracking after each context property and now I replace it with only a single call on the final query (or disable it via the ChangeTracker ) will it have

问题 So here we are trying to get a handle on EF7 ahead of the game and I'm running into what I can only call madness. In EF6 I use annotations quite a bit and I am trying to carry that over into EF7 which according to the UnicornStore project this is totally valid, however I'm running into a problem wherein visual studio 2015 complains that I don't have a reference to the System.ComponentModel.DataAnnotations assembly. Fair enough, I add my reference to the assembly and now I get the following

问题 Is it possible to change schema of __EFMigrationsHistory table in EntityFramework Core? 回答1: Do it in your call to UseSqlServer . optionsBuilder .UseSqlServer( "...", x => x.MigrationsHistoryTable( HistoryRepository.DefaultTableName, "mySchema")); 回答2: Looking into source code (HistoryRepository.cs). You can configure custom migrations table and schema names, inside DbContext constructor public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options) : base(options) { var

问题 We are working on a vary large ASP.NET Core MVC 1.0 application. We have 4-tiers to each of our applications as follows: DTO Repository (Entity Framework - Code First) Service (Business Logic) MVC (UI-MVC) Currently, in our repositories, which handle all database operations we have hard coded the database connection strings in the DbContext as follows: protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) { optionsBuilder.UseSqlServer("Data Source=somedatabase.database

问题 I am trying to generate a DbContext for an existing database structure using ASP.NET 5 and Entity Framework 7. Not surprisingly, there isn't a lot of documentation surrounding how to do this easily. Additionally, I want to scaffold ONLY the context; there are ~900 tables and I only care about a few of them, I don't need a model class for each one. I've been using the commands specified here and here with little luck. So, I guess I have two questions: Where are the generated context files

问题 I'm using Identity Core 1.0 with ASP.NET MVC Core 1.0 and Entity Framework Core 1.0 to create a simple user registration system with this article as a starting point, and I am trying to add user roles. I can add user roles, but I'm unable to edit them. Here is the Edit action in the RolesController : [HttpPost] [ValidateAntiForgeryToken] public IActionResult Edit(IdentityRole role) { try { _db.Roles.Attach(role); _db.Entry(role).State = Microsoft.EntityFrameworkCore.EntityState.Modified; _db

问题 I want to execute an SQL command from Entity Framework Core 2.0, but I can't figure out how to do so. 1.- The reason why I need to, is that I want to delete all data from a database table, and using Context.remove or Context.removeRange would produce many calls to DB (one for each data in the table). 2.- I've read that there is a method .ExecuteSqlCommand to accomplish that, but that method is not present in my Context.Database (maybe in Core 2.0 it was removed?). Here is the source of the

问题 I have a stored procedure with table valued parameter. I have to call it from Entity framework in .net core. I couldn't find any API on context object. I have tried with ADO.net API's and it worked but now I have to call it from EF in .net core. Stored procedure which I have to call returning result which I have to catch. My sample SP as below CREATE PROCEDURE [dbo].[GetMyData] @MyRequest [dbo].[MyRequestType] Readonly As BEGIN --Its sample SP thats why returned request table as it is select

问题 I've been trying to follow the advice of Ben Cull (http://benjii.me/2016/06/entity-framework-core-migrations-for-class-library-projects), but the database is a little different in that I'm trying to inherit from ASP.NET Core IdentityUser class. I created a new solution containing the default ASP.NET Core Web Application from the VS2015 template (CodeFirstTest). I then added an ASP.NET Core class-library (CodeFirstTest.User) to the solution, which would be the data layer in the application and

问题 I am new to EF7. I know this is a duplicate question to: No database providers are configured EF7 But wait before you want to have this question closed... and read on services.AddEntityFramework() .AddSqlServer() .AddDbContext<ApplicationDbContext>(options => options.UseSqlServer(Configuration["Data:DefaultConnection:ConnectionString"])); services.AddIdentity<ApplicationUser, IdentityRole>() .AddEntityFrameworkStores<ApplicationDbContext>() .AddDefaultTokenProviders(); services.AddScoped