ASP.NET中不定級(jí)動(dòng)態(tài)菜單的完成
發(fā)表時(shí)間:2024-01-17 來源:明輝站整理相關(guān)軟件相關(guān)文章人氣:
[摘要]作者:xiangwa 出處:CSDN 前日,根據(jù)客戶需要,要根據(jù)如下的表動(dòng)態(tài)生成如下的菜單:表中的數(shù)據(jù)是動(dòng)態(tài)更新的。 我們平時(shí)IEWebContr來做菜單時(shí)都是在html中直接輸入,也就是說是靜態(tài)的,現(xiàn)在要做成動(dòng)態(tài)的,而且菜單級(jí)數(shù)不定,怎么來實(shí)現(xiàn)呢?筆者通過研究發(fā)現(xiàn),用IEWebContr...
作者:xiangwa 出處:CSDN
前日,根據(jù)客戶需要,要根據(jù)如下的表動(dòng)態(tài)生成如下的菜單:表中的數(shù)據(jù)是動(dòng)態(tài)更新的。
我們平時(shí)IEWebContr來做菜單時(shí)都是在html中直接輸入,也就是說是靜態(tài)的,現(xiàn)在要做成動(dòng)態(tài)的,而且菜單級(jí)數(shù)不定,怎么來實(shí)現(xiàn)呢?筆者通過研究發(fā)現(xiàn),用IEWebContr來做菜單時(shí),菜單項(xiàng)可以直接輸入,也可以用如下的方法指定從某一個(gè)文件中讀取菜單項(xiàng):
<iewc:TreeView runat="server" ID="Treeview1" NAME="Treeview1">
<iewc:TreeNode id="Treenode1" runat="server" TreeNodeSrc="menuone.txt" Expanded="True" Text="信息類別列表"></iewc:TreeNode>
</iewc:TreeView>
其中menuone.txt的內(nèi)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='蘿卜' NavigateUrl='xxcb_add.aspx?classname=蘿卜&classid=0102'?? Target='main1'/>
<treenode text='黃花菜' NavigateUrl='xxcb_add.aspx?classname=黃花菜&classid=0103'?? Target='main1'/>
</treenode>
<treenode text='水果' NavigateUrl='xxcb_add.aspx?classname=水果&classid=02'? Target='main1'>
<treenode text='蘋果' NavigateUrl='xxcb_add.aspx?classname=蘋果&classid=0201'? Target='main1'>
<treenode text='紅富士' NavigateUrl='xxcb_add.aspx?classname=紅富士&classid=020101'?? Target='main1'/>
<treenode text='其它蘋果' NavigateUrl='xxcb_add.aspx?classname=其它蘋果&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='糧食' NavigateUrl='xxcb_add.aspx?classname=糧食&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>
現(xiàn)在的問題變成了如何將數(shù)據(jù)表根據(jù)“類別號(hào)”修改menuone.txt文件。將該過程放在對(duì)數(shù)據(jù)表修改后進(jìn)行。下面是根據(jù)表的內(nèi)容生成menuone.txt的源代碼:
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()
這樣menuone.txt就按要求生成了菜單源文件。