public static IEnumerable <ResultWithHotelId> processResults(SqlDataReader reader)
{
var i = new intervals.IntervalCounter();
int currentHotel = int.MinValue;
while (reader.Read())
{
if (currentHotel != reader.GetInt32(0))
{
if (currentHotel != int.MinValue)
{
//send the results
foreach (intervals.IntervalCounter.Result r in i.Terminate())
{
yield return(new ResultWithHotelId()
{
Result = r, HotelId = currentHotel
});
}
}
currentHotel = reader.GetInt32(0);
i.Init();
}
i.Accumulate(reader.GetDateTime(1), reader.GetDateTime(2));
}
//send back the final set of results
foreach (intervals.IntervalCounter.Result r in i.Terminate())
{
yield return(new ResultWithHotelId()
{
Result = r, HotelId = currentHotel
});
}
}
public static void GetHotelStayIntervalCounts(
SqlInt32 MinHotelId,
SqlInt32 MaxHotelId)
{
SqlConnectionStringBuilder sb = new SqlConnectionStringBuilder();
sb.ContextConnection = true;
using (var conn = new SqlConnection(sb.ConnectionString))
{
var comm = conn.CreateCommand();
comm.CommandText =
@"SELECT
HotelId,
CheckInDate,
CheckOutDate
FROM dbo.HotelStays
WHERE
HotelId BETWEEN @minHotelId AND @maxHotelId
ORDER BY
HotelId,
CheckInDate";
comm.Parameters.AddWithValue("@minHotelId", MinHotelId);
comm.Parameters.AddWithValue("@maxHotelId", MaxHotelId);
conn.Open();
var reader = comm.ExecuteReader(CommandBehavior.CloseConnection);
var i = new intervals.IntervalCounter();
SqlDataRecord dr = new SqlDataRecord(
new SqlMetaData("HotelId", SqlDbType.Int),
new SqlMetaData("intervalStart", SqlDbType.Date),
new SqlMetaData("intervalEnd", SqlDbType.Date),
new SqlMetaData("numberOfRooms", SqlDbType.Int));
SqlContext.Pipe.SendResultsStart(dr);
int currentHotel = int.MinValue;
while (reader.Read())
{
if (currentHotel != reader.GetInt32(0))
{
if (currentHotel != int.MinValue)
{
dr.SetInt32(0, currentHotel);
//send the results
foreach (intervals.IntervalCounter.Result r in i.Terminate())
{
dr.SetDateTime(1, r.Start);
dr.SetDateTime(2, r.End);
dr.SetInt32(3, r.Count);
SqlContext.Pipe.SendResultsRow(dr);
}
}
currentHotel = reader.GetInt32(0);
i.Init();
}
i.Accumulate(reader.GetDateTime(1), reader.GetDateTime(2));
}
//send back the final set of results
foreach (intervals.IntervalCounter.Result r in i.Terminate())
{
dr.SetDateTime(1, r.Start);
dr.SetDateTime(2, r.End);
dr.SetInt32(3, r.Count);
SqlContext.Pipe.SendResultsRow(dr);
}
SqlContext.Pipe.SendResultsEnd();
}
}
public void Init()
{
counter = new intervals.IntervalCounter();
}
