主题：[求助]关于用SQL语句设计加载树

都一样，万变不离其宗，理解了代码，一通百通：

    Dim dr As DataRow = e.Node.DataRow '获取生成此节点的DataRow
    Select Case e.Node.Level
        Case 0
            Filter ="[产品] = '" & dr("产品") & "'"
        Case 1
            Filter ="[产品] = '" & dr("产品") & "' And [客户] = '" & dr("客户") & "'"
        Case 2
            Filter ="[产品] = '" & dr("产品") & "' And [客户] = '" & dr("客户") & "' And 雇员 = '" & dr("雇员") & "'"
    End Select