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'首先生成统计表
Dim dt As DataTable
Dim b As New SQLGroupTableBuilder("统计表1","订单")
b.Groups.AddDef("日期",DateGroupEnum.Year,"年")
b.Groups.AddDef("日期",DateGroupEnum.Month,"月")
b.Groups.AddDef("产品")
b.Totals.AddExp("金额","单价 * 数量")
dt = b.Build(False) '参数设置为False,生成一个临时表,不在主界面显示
'然后根据统计表生成目录树
Dim trv As WinForm.TreeView = e.Form.Controls("TreeView1")
trv.BuildTree(dt, "年|月|产品")
trv.StopRedraw
For Each nd As WinForm.TreeNode In trv.AllNodes
Dim Year As Integer = nd.DataRow("年")
Dim Month As Integer = nd.DataRow("月")
Dim Product As String = nd.DataRow("产品")
Select Case nd.Level
Case 0
nd.Text = nd.text & "年(" & dt.Compute("Sum(金额)","年 = " & Year) & ")"
Case 1
nd.Text = nd.text & "月(" & dt.Compute("Sum(金额)","年 = " & Year & " And 月 = " & Month) & ")"
Case 2
nd.Text = nd.text & "(" & nd.DataRow("金额") & ")"
End Select
Next
trv.Nodes.Insert("加载所有行","加载所有行(" & dt.Compute("Sum(金额)") & "条)",0)
trv.ResumeRedraw
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Post By：2017/7/12 11:16:00 [显示全部帖子]
