How can I call a SQL Stored Procedure using EntityFramework 7 and Asp.Net 5

Question

For last couple of days I am searching for some tutorials about how to call a Stored Procedure from inside a Web API controller method using

Answer 1

For Database first approach , you have to use Scaffold-DbContext command

Install Nuget packages Microsoft.EntityFrameworkCore.Tools and Microsoft.EntityFrameworkCore.SqlServer.Design

Scaffold-DbContext "Server=(localdb)\mssqllocaldb;Database=Blogging;Trusted_Connection=True;" Microsoft.EntityFrameworkCore.SqlServer -OutputDir Models

but that will not get your stored procedures. It is still in the works,tracking issue #245

But, To execute the stored procedures, use FromSql method which executes RAW SQL queries

e.g.

var products= context.Products
    .FromSql("EXECUTE dbo.GetProducts")
    .ToList();

To use with parameters

var productCategory= "Electronics";

var product = context.Products
    .FromSql("EXECUTE dbo.GetProductByCategory {0}", productCategory)
    .ToList();

or

var productCategory= new SqlParameter("productCategory", "Electronics");

var product = context.Product
    .FromSql("EXECUTE dbo.GetProductByName  @productCategory", productCategory)
    .ToList();

There are certain limitations to execute RAW SQL queries or stored procedures.You can’t use it for INSERT/UPDATE/DELETE. if you want to execute INSERT, UPDATE, DELETE queries, use the ExecuteSqlCommand

var categoryName = "Electronics";
dataContext.Database
           .ExecuteSqlCommand("dbo.InsertCategory @p0", categoryName);