主题：[求助]按条件生成目录树

请教老师，如何按条件生成目录树？比如只生成 HGB402 =  _UserDept 的目录树，以下代码如何修改？

Dim cmd As New SQLCommand
Dim dt As DataTable
cmd.C
cmd.CommandText = "SELECT DISTINCT HGB402,HJYG003,楼院名称 Fro m {XWGHDH}"
dt = cmd.ExecuteReader()
Dim trv As WinForm.TreeView = e.Form.Controls("TreeView1")
trv.BuildDataTree(dt, "","HGB402","HJYG003", "楼院名称")