ldataset 与 list 的使用

[WebMethod(Description = @"根据时间查询会议项目[时间格式为：2014-01-01]
DateTime StartTime , DateTime Endtime ")]
public List<string []> GetMeetingNameByDate(DateTime StartDate, DateTime EndDate)
{
string dbConnString = SqlDAL.GetDBConnString();

string sqlWhere = string.Format(@"select
MeetingID,
MeetingCaption,
convert(varchar(100), BeginDate ,120) as BeginTime,
convert(varchar(100),EndDate ,120) as EndTime
from T_Meeting where 1 = 1 And BeginDate >= '{0}' And EndDate <= DATEADD(DD ,1,'{1}') ",
StartDate, EndDate);
SqlConnection connGetMeetingNameByDate = new SqlConnection(dbConnString);
connGetMeetingNameByDate.Open();
SqlDataAdapter daGetMeetingNameByDate = new SqlDataAdapter(sqlWhere, connGetMeetingNameByDate);
DataSet dsGetMeetingNameByDate = new DataSet();
daGetMeetingNameByDate.Fill(dsGetMeetingNameByDate);
DataTable dt = dsGetMeetingNameByDate.Tables[0];
List<string[]> lsGetMeetingNameByDate = new List<string[]>();
foreach (DataRow it in dt.Rows)
{
int colCount = it.ItemArray.Count();
string[] item = new string[colCount];
for (int i = 0; i < colCount; i++)
{
item[i]= Convert.ToString( it.ItemArray[i]);
}
lsGetMeetingNameByDate.Add(item);
}

return lsGetMeetingNameByDate;

}