Retrieve data from stored procedure which has multiple result sets

Question

Given a stored procedure in SQL Server which has multiple select statements, is there a way to work with those results separately while calling the procedure?

Answer 1

Create an SqlDataAdapter, set its SelectCommand to execute the SP "GetSomething", and then use the data adapter to fill a DataSet. The DataSet will contain as many DataTable's as you have "select" statements returning recordsets from the SP.

Here's what your code would look like:

System.Data.SqlClient.SqlDataAdapter da = new System.Data.SqlClient.SqlDataAdapter();
System.Data.SqlClient.SqlCommand cmd = new System.Data.SqlClient.SqlCommand();
cmd.Connection = myConnectionObject;
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = "GetSomething";
da.SelectCommand = cmd;

System.Data.DataSet ds = new DataSet();
da.Fill(ds);
// at this point, the (ds) object contains DataTables created from the recordsets returned by the SP
DataTable dt0 = ds.Tables[0];
DataTable dt1 = ds.Tables[1];

// note that dt0 corresponds to the FIRST recordset returned by the SP, etc.

Answer 2

It seems like there's no good simple way to do this, without a hack or a major paradigm shift. It looks like the best way is to just split out the original procs and end up with one more proc than before:

Old way:

create procedure dbo.GetSomething
as
begin
    select * from dbo.Person;
    select * from dbo.Car;
end;

New way:

create procedure dbo.GetPeople
as
begin
    select * from dbo.Person;
end;

create procedure dbo.GetCars
as
begin
    select * from dbo.Car;
end;

-- This gives the same result as before
create procedure dbo.GetSomething
as
begin
    exec dbo.GetPeople;
    exec dbo.GetCars;
end;

Then when I'm in a different proc and need both result sets, I'd just have to call them one at a time.

Answer 3

Would passing a parameter to the sp do the trick
----------------------
CREATE PROCEDURE  dostuff @parm1 int
AS

BEGIN
Declare @resultset Int
Set @resultset = @parm1

--0 = Select ranks
--1 = Select suits
--other - Select ALL

If @resultset = 0 
 SELECT [rank] FROM [ranks]
 Else If @resultset = 1
 SELECT [suit] FROM [suits]
 Else 
 SELECT * FROM [suits]
 cross join   [ranks] 
END
GO

 declare @mytemptbl table (rank text)
 insert @mytemptbl
  exec dostuff 0

 select * from @mytemptbl