初学者提问:
帮助的代码:
1、窗口的AfterLoad事件代码改为:
Dim cmd As New SQLCommand
Dim dt As DataTable
cmd.CommandText = "SELECT DISTINCT Year(日期) As 年, Month(日期) As 月, 产品 From {订单}"
dt = cmd.ExecuteReader()
Dim trv As WinForm.TreeView = e.Form.Controls("TreeView1")
trv.BuildTree(dt, "年|月|产品")
2、目录树的NodeMouseDoubleClick事件代码改为:
Dim Value()As String
Dim Filter As String
Value = e.Node.FullPath.Split("\")
Select Case e.Node.Level
Case 0
Filter ="Year(日期) = " & Value(0)
Case 1
Filter ="Year(日期) = " & Value(0) & " And Month(日期) = " & Value(1)
Case 2
Filter ="Year(日期) = " & Value(0) & " And Month(日期) = " & Value(1) & " And 产品 = '" & Value(2) & "'"
End Select
DataTables("订单").LoadFilter = Filter
DataTables("订单").Load()
生成的目录树是:
此主题相关图片如下:sql.png
[此贴子已经被作者于2012-3-16 17:31:06编辑过]