c# - How to execute stored procedure with input and output parameters using EF?

Question

I am using EF code first approach and I have created stored procedure using migration as following:

public override void Up()
    {
        Sql(@"CREATE TYPE IdsList AS TABLE   
                    ( 
                    Id Int
                    )
                    GO

                    Create Procedure getChildIds(
                    @IdsList dbo.IdsList ReadOnly
                    )
                    As
                    Begin
                    WITH RecursiveCTE AS
                    (
                        SELECT Id
                        FROM dbo.PhysicalObjects
                        WHERE ParentId in (Select * from @IdsList)
                        --Where Id=108
                        UNION ALL

                        SELECT t.Id
                        FROM dbo.PhysicalObjects t
                        INNER JOIN RecursiveCTE cte ON t.ParentId = cte.Id
                    )
                    SELECT * FROM RecursiveCTE
                    End");
    }

    public override void Down()
    {
        Sql(@"Drop Type IdsList
                Go
                Drop Procedure getChildIds");
    }

Now If I go to sql server management studio and execute the following scripts:

Declare @Ids dbo.IdsList

Insert into @Ids
SELECT 1

Exec getChildIds @Ids

It will execute successfuly, but Now I am trying to execute that stored procedure as following:

 var idsList = new SqlParameter {ParameterName = "idsList",  Value = new int[] { 1,2,3,4,5} };

 var idParams = new SqlParameter("idParams", SqlDbType.Structured)
            {
                Direction = System.Data.ParameterDirection.Output
            };

var results = dbContext.Database.SqlQuery<int>("getChildIds @idsList, @idParams out", idsList,idParams) ;

var idsResult = (List<int>)idParams.Value;

It does not return anything.

So how I could execute stored procedure with input and output parameters of type Table?

Answer 1

You will have to obtain your data a different way:

You cannot return data in a table-valued parameter. Table-valued parameters are input-only; the OUTPUT keyword is not supported.