Entity Framework code-first & stored procedure - entity-framework

Question

I am using a code-first approach in my application. I have generated the entities (tables) using the approach. Now I would like to create a stored procedure as well through code. Can someone guide me as I tried migration option and it's failing.
I am using Entity Framework Code First approach.Using this,I have created Customer and some other entities.
Now I want to create a stored procedure 'GetCustomers' using context class and pass parameters and get result set in a collection
it has to return 2 collections as below
create procedure getcustomer #name nvarchar(max),#zipcode int
as
select id,name,zipcode from Customer where name like (#name );
select id,name,zipcode from Customer where zipcode =#zipcode
I want to create a stored procedure 'GetCustomers' using context class and not manually execute in DB.I need to achieve below results:
1.Pass name parameter alone and return first collection
2.Pass zipcode parameter alone and return 2nd collection.
3.Combine result collection of 1 and 2 into a single collection using merge

Answer 1

You can create/generate stored Procedure using CreateStoredProcedure() method using Add-
Migration option in Entity Framework.
Step 1: Generate Migration script using add-migration SP_DO_NOT_DELETE in Package Manager Console. If no Model Changes is there, then the system will generate Empty migration script like below.
public partial class SP_DO_NOT_DELETE : DbMigration
{
public override void Up()
{
}
public override void Down()
{
}
}
Step 2: After generating the Script, Please add your stored procedure inside Up() and down() methods like below. Note: below example, "dbo.GetNextDisplayId" is the Stored Procedure Name which will be used to get the NextAvailableDisplayId using Stored procedure.
public partial class SP_DO_NOT_DELETE : DbMigration
{
public override void Up()
{
CreateStoredProcedure(
"dbo.GetNextDisplayId",
body:
#"DECLARE #requestid INT
SELECT #requestid = NextAvailableDisplayId
FROM [TrackingNumberHistories] WITH (TABLOCKX)
UPDATE [TrackingNumberHistories]
SET NextAvailableDisplayId = #requestid + 1
SELECT #requestid AS 'NextAvailableDisplayId'"
);
}
public override void Down()
{
DropStoredProcedure("dbo.GetNextDisplayId");
}
}
Note: CreateStoredProcedure() in Up() Method will create Stored procedure automatically whenever running migration script. DropStoredProcedure() in Down() will be used to drop stored procedure when ever we roll back/delete the stored procedure automatically in migration script.
Hope this might help you to move forward!!