2024 C# entity framework multiple databases

C# entity framework multiple databases

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WebMar 30, 2024 · Entity framework core (v2.0) allows separating DB schema into multiple projects where one project holds one or more DB contexts. Sample solution will use the following tables in two schemas: Users.User Users.Role Products.Product MVC Web API Project First step is to create a MVC Web API Core project that will later use our DB … WebJul 25, 2011 · For an example of developing an EF Code-First application that targets multiple databases, see the article "Entity Framework Code-First support for Oracle, MySQL, PostgreSQL and SQLite". When ...

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WebFeb 5, 2014 · Entity Framework with multiple databases Ask Question Asked 9 years, 2 months ago Modified 9 years, 2 months ago Viewed 712 times 0 Is there anyway to map multiple SQL Server databases in a single EF context? For instance I'm trying to do something like this WebSep 30, 2015 · This way in a multi-tenant application you can create database per tenant and use it. You don't need to change your webconfig to add connection string there, you can simply create connection string at run-time. Now you can design an structure to get context based on your tenant detection strategy. fazekas mihály gimnázium debrecen nyílt nap

Using Multiple Databases in ASP.NET Core via Entity …

WebNov 30, 2013 · It's not important that how many DbContexts you have (In entity framework 6). Just put connection strings in appConfig or webConfig of startup project. Then you're ready to go. Example of appConfig with two connectionString with Ef 6.01 & Sql … WebJan 18, 2014 · It is useful when using many DbContexts in you app. For example if you have thousands of tables - I just created so called "modules" with about hundred table per module. And each "module" has single context sometimes though I need to do cross-module data modifications in a single transaction Share Improve this answer Follow WebDec 8, 2024 · Entity Framework Core migrations on multiple databases. I am creating a .NET 6 API using EF core with SQL Server, and trying to implement multiple databases that would different connection strings based on an id that is passed in from an identity token. Essentially, there would be multiple databases that each contain the same … fazekas mihály gimnázium budapest

c# - One transaction with multiple dbcontexts - Stack Overflow

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WebJan 5, 2016 · In entity framework, if you're working with an existing database, you can set the connection string at runtime. The DbContext constructor allows you to include a connection string either by name (in the app.config or web.config file depending on the application) or by the full SQL connection string, but with the additional metadata section. fazekas mihály gimnázium debrecenWebAug 15, 2014 · You just confirmed that all databases need to be upgraded the same time, then you only need to use one database to add the migration, then update it to all databases. You can specify the connection string name parameter based on connection string name in the config. fazekas radiology assistant

"WebMay 14, 2024 · Select “Entity Framework 6.x” : Select required database objects you want to manage (in this example there is only a table named “People”) Rename the model namespace “SampleDB1_Model” to “SampleDB_Model” then click on Finish button. Our model is created, a class named “SampleDB_Entities” inherits of DbContext. " - C# entity framework multiple databases

C# entity framework multiple databases

c# - Entity Framework with multiple databases - Stack Overflow

WebSep 4, 2024 · If the databases can communicate to each other (ie on same server ), which appears to be already done since CustomCode contains lots of views and stored procedures that joins to Vendor and LogData then create a stored procedure to perform the desired queries ( which can join tables from separate databases ). http://olivierhelin.com/blog/entity-framework/entity-framework-6-one-entity-data-model-multiple-databases-2

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WebAug 21, 2024 · You can separate your DbConfiguration for another project using web.config (or app.config) file and setting codeConfigurationType of entityframework xml node. So I use official configuration class as attribute for migration project , however I use my custom configuration class for main web project. – burcinsahin Apr 27, 2024 at 15:15 WebApr 25, 2024 · AddDbContext (options => options.UseSqlServer (@"Server= (localdb)\mssqllocaldb;Database=EFGetStarted.ConsoleApp.NewDb;Trusted_Connection=True;")) .AddDbContext (options => options.UseSqlServer (@"Server= (localdb)\mssqllocaldb;Database=EFGetStarted.ConsoleApp.NewDb;Trusted_Connection=True;")) …

WebMay 23, 2011 · 4 Answers Sorted by: 43 The property modelBuilder.HasDefaultSchema in OnModelCreating is sufficient if you implement IDbModelCacheKeyProvider on your DbContext. A model is created once and than cached internally by EntityFramwork and you can define your own key for the cache. WebApr 9, 2024 · I'm trying to code first a database with spanner and Entity Framework Core. But when EnsureCreated is hit, the application throws the following exception. System.InvalidOperationException: 'No primary key was found in the database for table Table DistributionChannel.

Web1 day ago · Invalid object name 'dbo.__MigrationHistory' using Database.Create; EF6.02 when connection string is passed in 2 Upgraded EF5 to EF 6 and now get "Cannot find the object because it does not exist or you do not have permissions." WebAug 31, 2024 · 5. I have created an application (net core 2 & ef core) with Unit Of Work and Generic repository pattern. I used to have one database context but due to some business logic I had to create a second database with some same entities. For the sake of simplicity, I will use only one Entity, the ProductEntity and I will use only 1 repository method ...

WebJul 20, 2015 · Each instance of your context has one database connection. Assuming that each child database wille have the same code-first model, you can launch one instance of the same context class for each database. Just call DbContext.Initialize ( true ) to migrate the database, then close the connection.

WebMay 11, 2024 · Supporting multi-tenancy. There are many approaches to implementing multi-tenancy in applications. One common approach (that is sometimes a requirement) is to keep data for each customer in a separate database. The schema is the same but the data is customer-specific. Another approach is to partition the data in an existing database by … fazekas mihály gyakorló gimnáziumWebTo return a list from a stored procedure using Entity Framework, you can follow these general steps: Create a stored procedure in your database that returns the data you want to retrieve. Update your Entity Framework model to include the stored procedure. Call the stored procedure using Entity Framework and return the results as a list. honda 140cc dirt bikeWebApr 11, 2024 · Let's assume this table. Table "product". id bigint. name string. status int. The users can filter individually by choosing and combining different filters. So I have a list of filters which should be applied to the query. So if a user wants to filter only by id, I need a query which looks like this, but with the product.id filled by a variable. honda 1.4 i dsi engineWebUsing the following commands would create a new migration for each context. PM> dnx ef migrations add Update1 -c "ContextAContext" PM> dnx ef migrations add Update1 -c "ContextBContext". and the generated files are put in the correct folders. Share. fazekas mihály gimnázium debrecen szóbeli felvételiWebMay 4, 2024 · So basically the steps for adding more DbContexts is to: Create a DbContext Class Create a Connection string for that DbContext in appsettings.json Add the DbContext to your configured services in Startup.cs Setup the DbContext in the controllers that will use it. fazekas mihály gimnázium debrecen gyakori kérdésekWebJan 6, 2014 · Entity framework code first migration to multiple database Ask Question Asked 9 years, 3 months ago Modified 7 years ago Viewed 9k times 3 Lets say we have the architecture model of web application where we have 1 database per 1 account. Database structure is the same for these accounts and differs only on data with in. fazekas mihaly gimnazium debrecenWebApr 9, 2024 · I'm trying to develop a simple c# MVVM CRUD application which hooks up to a SQL Server database, I'm currently having an issue deleting records of my entities Apparently the entityId I'm searching for returns null, in which I'm pretty much sure it exists in the database, Therefore no deleting happens I could really use you help! thank you! honda 150 barueri