如何使用c＃中的数据集从数据库中获取最近注册的记录。我想在两个给定日期之间获取最近注册的数据并生成报告。
我的表在数据库上是这样的 See image -Table in the database
Id Refno TradingName Seta TransactionDate SetaLevy SetaAdmin SetaInterest SetaPenalty TotalSetaCollected SchemeYear
70112109 L760732281 GOLDMAN SACHS INTERNATIONAL BANKING 2014-01-01 00:00:00.000 -15918,12 -2404,9 0 0 -18323,02 2013
70200624 L250734490 TROPICANA IMPORTERS & EXPORTERS WHOLESALE AND RETAIL 2014-01-01 00:00:00.000 -2805,75 -423,89 0 0 -3229,64 2013
70239219 L760732281 GOLDMAN SACHS INTERNATIONAL BANKING 2014-02-01 00:00:00.000 -178917,65 -27030,73 0 0 -205948,38 2013
70320888 L250734490 TROPICANA IMPORTERS & EXPORTERS WHOLESALE AND RETAIL 2014-02-01 00:00:00.000 -2734,63 -413,15 0 0 -3147,78 2013
70368752 L760732281 GOLDMAN SACHS INTERNATIONAL BANKING 2014-03-01 00:00:00.000 -68072,97 -10284,41 0 0 -78357,38 2013
70450502 L250734490 TROPICANA IMPORTERS & EXPORTERS WHOLESALE AND RETAIL 2014-03-01 00:00:00.000 -2563,18 -387,24 -2,75 -295,04 -3248,21 2013
70575355 L250734490 TROPICANA IMPORTERS & EXPORTERS WHOLESALE AND RETAIL 2014-04-01 00:00:00.000 -2671,44 -403,6 -0,72 -307,5 -3383,26 2013
70575014 L380706855 BONITO DISTRIBUTORS CC WHOLESALE AND RETAIL 2014-04-01 00:00:00.000 -490,42 -74,09 -0,26 -56,75 -621,52 2013
70489231 L760732281 GOLDMAN SACHS INTERNATIONAL BANKING 2014-04-01 00:00:00.000 -17112,97 -2585,41 0 0 -19698,38 2013
70972265 L380706855 BONITO DISTRIBUTORS CC WHOLESALE AND RETAIL 2014-05-01 00:00:00.000 224,18 33,87 -0,59 -33,44 224,02 2013
70972585 L760732281 GOLDMAN SACHS INTERNATIONAL BANKING 2014-05-01 00:00:00.000 -15697,31 -2371,54 0 0 -18068,85 2014
71071473 L250734490 TROPICANA IMPORTERS & EXPORTERS WHOLESALE AND RETAIL 2014-05-01 00:00:00.000 -2727,84 -412,12 0 0 -3139,96 2014
70932675 L740753381 KOREAN JOURNAL PUBLIC SECTOR 2014-05-01 00:00:00.000 -152,68 -21,81 0 0 -174,49 2011
我目前的代码是这样的
public DataSet getRecentRegistrations(DateTime startMonth, DateTime endMonth, long setaCode)
{
var query = (from _transaction in
_entities.LevyTransactions
join _seta in _entities.Setas on _transaction.SetaCode equals _seta.SetaCode
join company_details in _entities.Organisations on _transaction.Refno equals company_details.Refno
where(_transaction.TransactionDate >= startMonth || startMonth == null)
&& (_transaction.TransactionDate <= endMonth || endMonth == null)
&& (_transaction.SetaCode == setaCode || setaCode < 0)
select new
{
SetaCode = _transaction.SetaCode,
RefNo = company_details.Refno,
TradingName = company_details.TradingName,
Seta = _transaction.SetaCode+" - "+_seta.Description,
SetaLevy = _transaction.SetaLevy,
SetaInterest = _transaction.SetaInterest,
SetaAdmin = _transaction.SetaAdmin,
SetaPenalty = _transaction.SetaPenalty,
TotalSetaCollected = _transaction.TotalSetaCollected
});
DataSet ds = new DataSet();
ds.Tables.Add(query.CopyToDataTable());ds.Tables[0].TableName = "Table1";
ds.Tables.Add(headerTable("Transaction Month From : "
+HelperService.formatDate("yyyy-MM-dd", startMonth) + " To :"
+ HelperService.formatDate("yyyy-MM-dd", endMonth),"Recently Registered Companies"));
ds.Tables[1].TableName ="Table2";
var setaRows = (from DataRow dRow in ds.Tables[0].Rows
select new { SetaCode = dRow["SetaCode"], Seta = dRow["Seta"]}).Distinct();
ds.Tables.Add(setaRows.CopyToDataTable()); ds.Tables[2].TableName = "Table3";
return ds;
}
我目前输出的报告只是给了我在两个日期之间找到的所有记录，但需要输出的只是新的注册记录。
所以我目前的出局是这样的。
最近注册日期： 2014-04-01 -2014-05-01
Id Refno TradingName Seta TransactionDate SetaLevy SetaAdmin SetaInterest SetaPenalty TotalSetaCollected SchemeYear
70575355 L250734490 TROPICANA IMPORTERS & EXPORTERS WHOLESALE AND RETAIL 2014-04-01 00:00:00.000 -2671,44 -403,6 -0,72 -307,5 -3383,26 2013
70575014 L380706855 BONITO DISTRIBUTORS CC WHOLESALE AND RETAIL 2014-04-01 00:00:00.000 -490,42 -74,09 -0,26 -56,75 -621,52 2013
70489231 L760732281 GOLDMAN SACHS INTERNATIONAL BANKING 2014-04-01 00:00:00.000 -17112,97 -2585,41 0 0 -19698,38 2013
70972265 L380706855 BONITO DISTRIBUTORS CC WHOLESALE AND RETAIL 2014-05-01 00:00:00.000 224,18 33,87 -0,59 -33,44 224,02 2013
70972585 L760732281 GOLDMAN SACHS INTERNATIONAL BANKING 2014-05-01 00:00:00.000 -15697,31 -2371,54 0 0 -18068,85 2014
71071473 L250734490 TROPICANA IMPORTERS & EXPORTERS WHOLESALE AND RETAIL 2014-05-01 00:00:00.000 -2727,84 -412,12 0 0 -3139,96 2014
70932675 L740753381 KOREAN JOURNAL PUBLIC SECTOR 2014-05-01 00:00:00.000 -152,68 -21,81 0 0 -174,49 2011
出局假设如下图所示
最近注册日期： 2014-04-01 -2014-05-01
Id Refno TradingName Seta TransactionDate SetaLevy SetaAdmin SetaInterest SetaPenalty TotalSetaCollected SchemeYear
70575014 L380706855 BONITO DISTRIBUTORS CC WHOLESALE AND RETAIL 2014-04-01 00:00:00.000 -490,42 -74,09 -0,26 -56,75 -621,52 2013
70932675 L740753381 KOREAN JOURNAL PUBLIC SECTOR 2014-05-01 00:00:00.000 -152,68 -21,81 0 0 -174,49 2011
请帮帮我。
