Entity Framework (Core) Query Multiple Tables From 2 Different Databases

Entity Framework 6 - Missing table with only primary keys referencing different tables

We are learning Entity Framework 6.1 (from NuGet) as we move away from Linq2Sql. We have a small handful of tables that associate two separate tables like shown below....EF6 Database First generation...DB Diagram:...Schema Overview:...When in Visual studios, blank class library, doing a Database First EF6 EDMX file, the diagram only generates Tabl...

Joining multiple tables from different databases

No, you can't do that with EntityFramework (neither 6.x nor Core). A DbContext is per database and you can only do joins within the same DbContext. ...You could create a view and map the view to the models you needs, but iirc. mapping of views is still on the roadmap for EntityFramework Core. May work with EntityFramework 6.x though....Edit:...At l...

Run different database types in different environments in dotnet core 2

So I guess I found a nice way for you to do that. You can use the ...ConfigureDevelopmentServices... startup convention to add your SQLSite DbContext. So, just as some basic example you would have:...// Production "like" ConfigureServices public void ConfigureServices(IServiceCollection services) { // Use Sql Server services.AddDbContext<Sc...

Entity Framework Core Database First - Multiple Foreign keys to one table

For posterity:...With the database approach a scaffold of the db is done to create the context and data models. ...The data models generated (using the example tables above) look something like this -...public partial class Buzz { public Buzz() { } public Guid Id { get; set; } public int TypeId1 { get; set; } public int TypeId2...

Searching for multiple strings using single database query with entity framework and LINQ

Alternative solution: use the EF 6.2 ...Like...:....Where(x => stringsToSearchFor.Any(s => DbFunctions.Like(x.name, $"%{s}%"))) ...Here's the documentation for ...DbFunctions.Like....

Using a single Entity Framework Core DbContext to manage multiple database schemas with homonymous tables

I think you can't get away from having two different EF objects for the different tables, and you probably shouldn't as they may diverge at some point in the future....At a minimum you need two classes ...Db1Panel... and ...Db2Panel... . I assume that actually the "Db" prefix is meant to meant a different schema, not actually a different database...

Add child entities to database and assign them to parent object in database Entity Framework Core

"First of all I don't see where a foreign key is set for the instance of type "DocumentLine"."...Well, then first of all - check that. In the actual database created by EF. You're most probably gonna find an FK on ...DocumentId... in your ...DocumentLines... table....Your ...Document... and ...DocumentLines... are in a 1toMany relationship - a ...D...

Pull data from multiple tables in one SQL query using LINQ and Entity Framework (Core)

You wrote:...I wanted to grab the 10 latest transactions and 10 latest customers in one LINQ query...It is a bit unclear what you want. I doubt that you want one sequence with a mix of Customers and Transactions. I guess that you want the 10 newest Customers, each with their last 10 Transactions?...I wonder why you would deviate from the ...entity ...

Connect multiple Databases to .NET core project via Entity Framework Core

I am trying to create a .NET core application that connects to multiple databases, but using one generic repository that contains the logic for all CRUD operations. What is the best way to achieve this? ... public Repository(ApplicationDbContext dbContext) { _dbContext = dbContext; _set = _dbContext.Set<T>(); } ...Above i...

Use multiple huge databases in one Entity Framework Core query with SQL Server?

I want to query multiple tables from different databases [on one server] in one single query...The simplest way to do this is to create views or synonyms for all the tables in a single database. EF won't be able to scaffold the model automatically, but if you create the model by-hand EF will simply send SQL to that single database ...as if... it c...