ToDataTable
组合统计得到的结果类型为fxDataSource。
fxDataSource有个ToDataTable方法,可以将其转换为一个临时的DataTable,方便后续使用。
例如:
Dim
bd1 As
New
GroupTableBuilder("统计表1",DataTables("进货单"))
Dim
dt1 As
fxDataSource
bd1.Groups.AddDef("型号")
'根据型号分组
bd1.Totals.AddDef("数量","进货_数量")
'对数量进行统计
bd1.Totals.AddDef("金额","进货_金额")
'对金额进行统计
dt1 =
bd1.BuildDataSource()
Dim
bd2 As
New
GroupTableBuilder("统计表2",DataTables("销售单"))
Dim
dt2 As
fxDataSource
bd2.Groups.AddDef("型号")
'根据型号分组
bd2.Totals.AddDef("数量","销售_数量")
'对数量进行统计
bd2.Totals.AddDef("金额","销售_金额")
'对金额进行统计
dt2 =
bd2.BuildDataSource()
Dim
bd3 As
New
GroupTableBuilder("统计表3",DataTables("退货单"))
Dim
dt3 As
fxDataSource
bd3.Groups.AddDef("型号")
'根据型号分组
bd3.Totals.AddDef("数量","退货_数量")
'对数量进行统计
bd3.Totals.AddDef("金额","退货_金额")
'对金额进行统计
dt3 =
bd3.BuildDataSource()
dt1.Combine("型号",dt2,"型号")
'将销售统计数据组合到进货统计数据
dt1.Combine("型号",dt3,"型号")
'将退货统计数据组合到进货统计数据
Dim tbl As DataTable = dt1.TodataTable() '将结果转换成DataTable