主题：[求助]筛选数增加根节点的代码

自己写代码就行，以帮助的那个例子为例：

Dim trv As WinForm.TreeView = e.Form.Controls("TreeView1")
Dim rd As WinForm.TreeNode = trv.Nodes.add("全部")
For Each cp As String In DataTables("订单").GetUniqueValues("","产品")
    Dim nd As WinForm.TreeNode = rd.Nodes.Add(cp)
    For Each kh As String In DataTables("订单").GetUniqueValues("产品 = '" & cp & "'","客户")
        nd.Nodes.add(kh)
    Next
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