Remove duplicate data on the basis of a large DataTable, create two small DataTable respectively, save multiple database connections, improve efficiency, speed up program running, datatable updates Database

Remove duplicate data on the basis of a large DataTable, create two small DataTable respectively, save multiple database connections, improve efficiency, speed up program running, datatable updates Database

DataTable tab = new DataTable ();

Tab = DBUtil. GetDataSet (strCmd, "TESTA. V_YHJ_VIP_WX_XSMX"). Tables [0];

Create a small table:

DataView view = new DataView (tab );


DataTable orderTable = view. ToTable (true, "ORDERDATE", "MEMBER_CODE", "INV_NUM", "ZJE", "ZFJE", "SELL_QTY", "SHOP_CODE ");

Generate a smaller table in str_Inv_Num Based on orderTable

For (int I = 0; I <orderTable. Rows. Count; I ++)
{
For (int j = 0; j <orderTable. Columns. Count; j ++)
{
If (j = 0)
{
Str_INV_DATE = orderTable. Rows [I] [j]. ToString (). Trim ();
// Shop_code = tab. Rows [I] [j]. ToString ();
}
If (j = 1)
Str_MemberCode = orderTable. Rows [I] [j]. ToString (). Trim ();
If (j = 2)
{
Str_Inv_Num = orderTable. Rows [I] [j]. ToString (). Trim ();
SubInv_Num = str_Inv_Num;
}
If (j = 3)
Inv_Totalamt = Convert. ToInt32 (orderTable. Rows [I] [j]. ToString (). Trim ());
If (j = 4)
Str_INV_AMT = Convert. ToInt32 (orderTable. Rows [I] [j]. ToString (). Trim ());
If (j = 5)
Int_Sell_Qty = Convert. ToInt32 (orderTable. Rows [I] [j]. ToString (). Trim ());
If (j = 6)
Str_Shop_Code = tab. Rows [I] [j]. ToString (). Trim ();
}


If (str_old_Inv_Num.Trim ()! = Str_Inv_Num.Trim () // remove a member with more than two documents, and each document has repeated records when multiple items are sold. At present, the first item of the First Order Number will list the item information. If there are multiple items in a list, duplicate data will appear if this sentence is not added. The result is incorrect.
{
View. RowFilter = "INV_NUM = '" + str_Inv_Num + "'";
OrderDetailTable = view. ToTable (true, "INV_NUM", "SKU", "C_SHORT_DE", "SELL_QTY", "SERIAL_NO ");


List <CofflineOrderDetail> lCofflineOrderDetail = DBUtil. GetList <CofflineOrderDetail> (orderDetailTable); // return the generic List
// OracleAccess. logger. Debug ("CAL_getOfflineOrder sub-table:" + str_vip.ToString () + DateTime. Now. ToLongDateString () + DateTime. Now. ToLongTimeString () +
// "," + Str_INV_DATE + "," + str_MemberCode + "," + str_Inv_Num + "," + Inv_Totalamt + "," + str_INV_AMT + "," + int_Sell_Qty + ", "+ str_Shop_Code +
// DBUtil. ToJson (subtab ));
Listorder. Add (new COfflineOrder (str_INV_DATE, str_MemberCode, str_Inv_Num, Inv_Totalamt, str_INV_AMT, str_Shop_Code, int_Sell_Qty, lCofflineOrderDetail ));
View. RowFilter = "";
Str_old_Inv_Num = str_Inv_Num;
}


}

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