我们平时IEWebContr来做菜单时都是在html中直接输入，也就是说是静态的，现在要做成动态的，而且菜单级数不定，怎么来实现呢？笔者通过研究发现，用IEWebContr来做菜单时，菜单项可以直接输入，也可以用如下的方法指定从某一个文件中读取菜单项：　　

＜iewc:TreeView runat="server" ID="Treeview1" NAME="Treeview1"＞ ＜iewc:TreeNode id="Treenode1" runat="server" TreeNodeSrc="menuone.txt" Expanded="True" Text="信息类别列表"＞ ＜/iewc:TreeNode＞ ＜/iewc:TreeView＞

　
　　其中menuone.txt的内容如下：　　

＜TREENODES＞ ＜treenode text='蔬菜' NavigateUrl='xxcb_add.aspx?classname=蔬菜&classid=01'? Target='main1'＞ 　＜treenode text='白菜' NavigateUrl='xxcb_add.aspx?classname=白菜&classid=0101'?? Target='main1'/＞ 　＜treenode text='萝卜' NavigateUrl='xxcb_add.aspx?classname=萝卜&classid=0102'?? Target='main1'/＞ 　＜treenode text='黄花菜' NavigateUrl='xxcb_add.aspx?classname=黄花菜&classid=0103'?? Target='main1'/＞ ＜/treenode＞ ＜treenode text='水果' NavigateUrl='xxcb_add.aspx?classname=水果&classid=02'? Target='main1'＞ 　＜treenode text='苹果' NavigateUrl='xxcb_add.aspx?classname=苹果&classid=0201'? Target='main1'＞ 　＜treenode text='红富士' NavigateUrl='xxcb_add.aspx?classname=红富士&classid=020101'?? Target='main1'/＞ ＜treenode text='其它苹果' NavigateUrl='xxcb_add.aspx?classname=其它苹果&classid=020102'?? Target='main1'/＞　　 ＜/treenode＞ 　＜treenode text='桃子' NavigateUrl='xxcb_add.aspx?classname=桃子&classid=0202'?? Target='main1'/＞ 　＜treenode text='荔枝' NavigateUrl='xxcb_add.aspx?classname=荔枝&classid=0203'?? Target='main1'/＞ ＜/treenode＞ ＜treenode text='粮食' NavigateUrl='xxcb_add.aspx?classname=粮食&classid=03'? Target='main1'＞ 　＜treenode text='大米' NavigateUrl='xxcb_add.aspx?classname=大米&classid=0301'?? Target='main1'/＞ 　＜treenode text='玉米' NavigateUrl='xxcb_add.aspx?classname=玉米&classid=0302'?? Target='main1'/＞ ＜/treenode＞ ＜/TREENODES＞

　　现在的问题变成了如何将数据表根据“类别号”修改menuone.txt文件。将该过程放在对数据表修改后进行。下面是根据表的内容生成menuone.txt的源代码：　　

Imports System.IO Dim txtwriter As StreamWriter txtwriter = File.CreateText(Server.MapPathstrpath ("\menuone.txt")) txtwriter.WriteLine("＜TREENODES＞") Dim objConn As OleDbConnection Dim objCmd As OleDbCommand Dim objRead As OleDbDataReader Dim strSQL, strDSN As String Dim strid, strname, strid1, strname1 As String Dim strand As String strand = "&"　　 Dim i, j, k, m As Integer i = 0 j = 0 k = 0 m = 0 strSQL = "select * from class order by classid " objConn = New OleDbConnection(ConfigurationSettings.AppSettings("connString")) objCmd = New OleDbCommand(strSQL, objConn) objCmd.Connection.Open() objRead = objCmd.ExecuteReader() While objRead.Read()　 　If j = 0 Then 　　j = Len(Trim(objRead.Item("classid"))) 　Else 　　strid = strid1 　　strname = strname1 　　i = Len(Trim(objRead.Item("classid"))) 　　k = i - j 　　Select Case k 　　　Case Is ＞ 0 　　　　txtwriter.WriteLine("＜treenode text='" & strname & "' NavigateUrl='xxcb_add.aspx?classname=" & strname & "" & strand & "classid=" & strid & "' Target='main1'＞") 　　　Case Is = 0 　　　　txtwriter.WriteLine("＜treenode text='" & strname & "' NavigateUrl='xxcb_add.aspx?classname=" & strname & "" & strand & "classid=" & strid & "' Target='main1'/＞") 　　　Case Is ＜ 0 　　　　txtwriter.WriteLine("＜treenode text='" & strname & "' NavigateUrl='xxcb_add.aspx?classname=" & strname & "" & strand & "classid=" & strid & "' Target='main1'/＞") 　　　'txtwriter.WriteLine("＜/treenode＞") 　　　m = k 　　　While m ＜ 0 　　　　txtwriter.WriteLine("＜/treenode＞") 　　　　m = m + 2 　　　End While 　　End Select 　　j = Len(Trim(objRead.Item("classid"))) 　End If　 　strid1 = Trim(objRead.Item("classid")) 　strname1 = Trim(objRead.Item("classname")) 　End While　　 　'strid = strid1 　'strname = strname1 　i = Len(strid) 　k = j - i 　strid = strid1 　strname = strname1 　Select Case k 　　Case Is ＞ 0 　　　txtwriter.WriteLine("＜treenode text='" & strname & "' NavigateUrl='xxcb_add.aspx?classname=" & strname & "" & strand & "classid=" & strid & "' Target='main1'/＞") 　　　'txtwriter.WriteLine("＜/treenode＞") 　　　m = Len(strid) / 2 　　　While m ＞ 1 　　　　txtwriter.WriteLine("＜/treenode＞") 　　　　m = m - 1 　　　End While 　　Case Is = 0 　　　txtwriter.WriteLine("＜treenode text='" & strname & "' NavigateUrl='xxcb_add.aspx?classname=" & strname & "" & strand & "classid=" & strid & "' Target='main1'/＞") 　　　'txtwriter.WriteLine("＜/treenode＞") 　　　m = Len(strid) / 2 　　　While m ＞ 1 　　　　txtwriter.WriteLine("＜/treenode＞") 　　　　m = m - 1 　　　End While 　　Case Is ＜= 0 　　　txtwriter.WriteLine("＜treenode text='" & strname & "' NavigateUrl='xxcb_add.aspx?classname=" & strname & "" & strand & "classid=" & strid & "' Target='main1'/＞") 　　　'txtwriter.WriteLine("＜/treenode＞") 　　　m = Len(strid) / 2 　　　While m ＞ 1 　　　　txtwriter.WriteLine("＜/treenode＞") 　　　　m = m - 1 　　　End While 　　End Select 　　txtwriter.WriteLine("＜/TREENODES＞") 　txtwriter.Close()

　　这样menuone.txt就按要求生成了菜单源文件。