DropDownList联动（经典）

CS :

protected void Page_Load(object sender, System.EventArgs e)
2

{
3

if (!IsPostBack)
4

{
5

DataSet ds = new DataSet();
6

ds.ReadXml(Server.MapPath("DataSource.xml"));
7

for(int i = 0;i <ds.Tables[0].Rows.Count ;i++)
8

{
9

DataRow dr = ds.Tables[0].Rows[i];
10

Want.Text += String.Format("Group[Groupcount++] = new Array(\"{0}\",\"{1}\",\"{2}\");\n", dr["v_Source"],dr["v_GroupName"].ToString(), dr["v_title"].ToString());
11

if (SourceList1.Items.FindByText(dr["v_Source"].ToString()) == null)
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{
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SourceList1.Items.Add(dr["v_Source"].ToString());
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}
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}
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}
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}

ASPX:

<%@ Page language="c#" Inherits="TowDropDownList.TowDropDownList" CodeFile="TreeDropDownList.aspx.cs" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >

<HTML>

<HEAD>

<title>TreeDropDownList</title>

var Wantcount;

var Groupcount;

Groupcount=0;

Group = new Array();

<asp:Literal id="Want" runat="server"></asp:Literal>

function changelocation1(locationid)

{

document.submit.DirectionList1.length = 0;

document.submit.WantList1.length = 0;

var locationid=locationid;

var i;

var flag;

var j;

for (i=0;i<Groupcount; i++)

{

if (Group[i][0] == locationid)

{

flag = true;

for (j =0;j<document.submit.DirectionList1.length;j++)

if (document.submit.DirectionList1[j].value == Group[i][1])

{

flag = false;

break;

}

if (flag)

document.submit.DirectionList1.options[document.submit.DirectionList1.length]

= new Option(Group[i][1], Group[i][1]);

}

function changelocation11(locationid, direction)

{

document.submit.WantList1.length = 0;

var locationid=locationid;

var i;

var flag;

var j;

for (i=0;i<Groupcount;i++)

{

if (Group[i][0] == locationid && Group[i][1] == direction)

{

flag = true;

for (j=0;j<document.submit.WantList1.length;j++)

if (document.submit.WantList1[j].value == Group[i][2])

{

flag = false;

break;

}

if (flag)

document.submit.WantList1.options[document.submit.WantList1.length]

= new Option(Group[i][2], Group[i][2]);

}

</script>

</HEAD>

<BODY>

<TR>

<asp:dropdownlist id="SourceList1" runat="server" DataTextField="v_source" DataValueField="v_source" onchange="changelocation1(document.submit.SourceList1.options[document.submit.SourceList1.selectedIndex].value);changelocation11(document.submit.SourceList1.options[document.submit.SourceList1.selectedIndex].value,document.submit.DirectionList1.options[document.submit.DirectionList1.selectedIndex].value)" Width="100px"></asp:dropdownlist>

<asp:dropdownlist id="DirectionList1" runat="server" DataValueField="v_GroupName" onchange="changelocation11(document.submit.SourceList1.options[document.submit.SourceList1.selectedIndex].value,document.submit.DirectionList1.options[document.submit.DirectionList1.selectedIndex].value)" Width="100px"></asp:dropdownlist>

<asp:dropdownlist id="WantList1" runat="server" DataValueField="v_title" Width="100px"></asp:dropdownlist></TD>

</TR>

</TABLE>

</form>

changelocation1(document.submit.SourceList1.options[document.submit.SourceList1.selectedIndex].value);

changelocation11(document.submit.SourceList1.options[document.submit.SourceList1.selectedIndex].value,document.submit.DirectionList1.options[document.submit.DirectionList1.selectedIndex].value)

</script>

</BODY>

</HTML>

XML:

<Data>

<v_Source>计算机类</v_Source>

<v_GroupName>软件</v_GroupName>

<v_title>程序员</v_title>

</Data>

<Data>

<v_Source>计算机类</v_Source>

<v_GroupName>软件</v_GroupName>

<v_title>系统分析员</v_title>

</Data>

<Data>

<v_Source>计算机类</v_Source>

<v_GroupName>软件</v_GroupName>

<v_title>项目经理</v_title>

</Data>

<Data>

<v_Source>计算机类</v_Source>

<v_GroupName>硬件</v_GroupName>

<v_title>网络工程师</v_title>

</Data>

<Data>

<v_Source>计算机类</v_Source>

<v_GroupName>硬件</v_GroupName>

<v_title>计算机维护</v_title>

</Data>

<Data>

<v_Source>计算机类</v_Source>

<v_GroupName>数据库</v_GroupName>

<v_title>数据库开发</v_title>

</Data>

<Data>

<v_Source>计算机类</v_Source>

<v_GroupName>数据库</v_GroupName>

<v_title>数据库管理</v_title>

</Data>

<Data>

<v_Source>行政/管理类</v_Source>

<v_GroupName>行政</v_GroupName>

<v_title>文秘</v_title>

</Data>

<Data>

<v_Source>行政/管理类</v_Source>

<v_GroupName>行政</v_GroupName>

<v_title>助理</v_title>

</Data>

<Data>

<v_Source>行政/管理类</v_Source>

<v_GroupName>管理</v_GroupName>

<v_title>总经理</v_title>

</Data>

<Data>

<v_Source>行政/管理类</v_Source>

<v_GroupName>管理</v_GroupName>

<v_title>部门经理</v_title>

</Data>

<Data>

<v_Source>行政/管理类</v_Source>

<v_GroupName>管理</v_GroupName>

<v_title>总监</v_title>

</Data>

</DataSource>

posted on 2006-12-28 10:46 Caviare 阅读(535) 评论(0) 编辑收藏举报