EF Core Stored Procedure Discover How to Query a SP in LINQ
The Entity Framework allows you to use stored procedures to perform predefined logic on database tables. Raw SQL queries can be used to execute a stored procedure.
Here is a simple stored procedure, it will return all the records from Customers table when executed.
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[GetAllCustomers]') AND type in (N'P', N'PC')) BEGIN EXEC dbo.sp_executesql @statement = N' CREATE PROCEDURE [dbo].[GetAllCustomers] AS SELECT * FROM dbo.Customers ' END GO
In EF Core, you can execute stored procedures using FromSql() method.
using (var context = new MyContext()) { var customers = context.Customers .FromSql("EXECUTE dbo.GetAllCustomers") .ToList(); }
You can also pass parameters when executing stored procedures.
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[GetCustomer]') AND type in (N'P', N'PC')) BEGIN EXEC dbo.sp_executesql @statement = N' CREATE PROCEDURE [dbo].[GetCustomer] @CustomerID int AS SELECT * FROM dbo.Customers WHERE CustomerID = @CustomerID ' END GO
It will return a specific record from Customers table based on CustomerID passed as a parameter.
using (var context = new MyContext()) { var customer = context.Customers .FromSql("EXECUTE dbo.GetCustomer 1") .ToList(); }
You can also pass a parameter value using C# string interpolation.
using (var context = new MyContext()) { int customerId = 1; var customer = context.Customers .FromSql($"EXECUTE dbo.GetCustomer {customerId}") .ToList(); }
Author: ZZZ Projects