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DataSet ds3 = DataProvider.Instance().ExecProcedure("R_Parities_Config_CurrencyExchangeRateExportAll", pList3);
var resultA = from r in ds3.Tables[0].AsEnumerable()
orderby DateTime.Parse(r["EffectiveDate"].ToString()) descending
select r;
DataTable TableA = resultA.CopyToDataTable();
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原文地址:http://www.cnblogs.com/dwuge/p/5261231.html