sql create table with stored procedure with optional parameters - asp.net

Question

I am writing a report based on parameters, utilizing a sql stored procedure. Problem is there are several 'optional' parameters, where the user can choose a value, or ignore that parameter altogether. I need to use the stored proc as a dataset in asp.net report. Only way I thought of doing it is to create a table from the results. But I'm clueless.
How do I turn this into a 'create table' stored proc?
Any assistance is greatly appreciated.
Cindy
This is what I have so far -
ALTER PROCEDURE [dbo].[rspSCL]
-- Add the parameters for the stored procedure here
(#year as int,
#RRID as int,
#State as nchar(2),
#Sub as varchar(75),
#app as int,
#sprayed as int,
#subcontracted as int,
#thirdapp as bit)
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
-- Insert statements for procedure here
DECLARE #SQL as varchar(4000)
DECLARE #SUBQ AS varchar(400)
--what fields need to be seen
SET #SQL = 'SELECT C.CRID, C.DOT, C.RR, C.Pref, C.MP, C.Division, C.Subdivision,C.City, C.Street,
C.State, C.County, C.RestrictedCounty, C.Remarks, C.SpecialInstructions, C.Route, C.ThirdAppRequired,
C.MainTrks, C.OtherTrks, C.OnSpur, C.MaxSpeed, C.SubContracted, C.FenceEncroachment, C.Lat, C.Long,
C.PropertyType, C.WarningDevice,C.Surface, C.ROWNE, C.ROWNW, C.ROWSE, C.ROWSW, C.ROWWidth, C.ExtNE,
C.ExtNW, C.ExtSE, C.ExtSW, C.TempActive, A.Spray, A.ContractYear'
SET #SUBQ =
CASE WHEN #app = 1 THEN
'FROM Crossings LEFT OUTER JOIN
(select A.CRID, A.spray FROM ApplicationData A
WHERE A.ContractYear = ' + CAST( #year AS varchar(4)) + ') as APPS
ON Crossings.CRID = APPS.CRID'
WHEN #app = 2 THEN
'FROM Crossings inner join
(SELECT crid, C,OUNT(APPID)as count
from ApplicationData
where ContractYear = ' + CAST( #year AS varchar(4)) + '
group by CRID) as APPS
ON Crossings.CRID = APPS.CRID
WHERE Crossings.RR = '+ CAST( #RRID AS varchar(4)) + '
and crossings.state = '+ #state + '
and count = 1'
when #app = 3 THEN
'FROM Crossings inner join
(SELECT crid, COUNT(APPID)as count
from ApplicationData
where ContractYear = ' + CAST( #year AS varchar(4)) + '
group by CRID) as APPS
ON Crossings.CRID = APPS.CRID
WHERE Crossings.RR = '+ CAST( #RRID AS varchar(4)) + '
and crossings.state = '+ #state + '
and count = 2'
ELSE ''
END
--add the FROM to the query
SET #SQL = #SQL + #SUBQ
--add the subdivision to the where statement
If #Sub != 'ALL'
SET #SQL = #SQL + 'AND (C.Subdivision = ' + #Sub + ')'
ELSE
SET #SQL = #SQL
--add sprayed to where
DECLARE #S as varchar(100)
SET #S =
CASE WHEN #sprayed = 1 THEN
'AND (A.sprayed = 1)'
WHEN #sprayed = 0 THEN
'AND (A.sprayed = 0)'
ELSE
''
END
SET #SQL = #SQL + #S
--add subcontracted to where
DECLARE #C as varchar (100)
SET #C =
CASE WHEN #subcontracted = 0 THEN
'AND (C.subcontracted = 0)'
WHEN #subcontracted = 1 THEN
'AND (C.subcontracted = 1)'
ELSE
''
END
SET #SQL = #SQL + #C
IF #thirdapp = 1
SET #SQL = #SQL + 'AND (C.ThirdAppRequired = 1)'
ELSE
SET #SQL = #SQL
END