<HTML>
<HEAD>
<title>XmlHttp实现无刷新三联动下拉框</title>
<meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<INPUT style="Z-INDEX: 102; LEFT: 448px; WIDTH: 56px; POSITION: absolute; TOP: 8px; HEIGHT: 24px"
onclick="getData();" type="button" value="test">
<asp:TextBox id="TextBox1" style="Z-INDEX: 101; LEFT: 16px; POSITION: absolute; TOP: 8px" runat="server"
Width="424px"></asp:TextBox>
<asp:DropDownList id="DropDownList2" runat="server" style="Z-INDEX: 103; LEFT: 176px; POSITION: absolute; TOP: 48px"></asp:DropDownList>
<asp:DropDownList id="DropDownList1" runat="server" style="Z-INDEX: 104; LEFT: 16px; POSITION: absolute; TOP: 48px"></asp:DropDownList>
<asp:DropDownList id="DropDownList3" runat="server" style="Z-INDEX: 105; LEFT: 296px; POSITION: absolute; TOP: 48px"></asp:DropDownList>
<SCRIPT LANGUAGE="JavaScript">
<!--
//以XML求取DropDownList2的数据
function XmlPost2(obj)
{
var svalue = obj.value;
var webFileUrl = "?provinceid=" + svalue;
var result = "";
var xmlHttp = new ActiveXObject("MSXML2.XMLHTTP");
xmlHttp.open("POST", webFileUrl, false);
xmlHttp.send("");
result = xmlHttp.responseText;
if(result != "")
{
document.all("DropDownList2").length=0;
var piArray = result.split(",");
for(var i=0;i<piArray.length;i++)
{
var ary1 = piArray[i].toString().split("|");
document.all("DropDownList2").options.add(new Option(ary1[1].toString(),ary1[0].toString()));
}
}
else
{
alert(result);
}
}
//以XML求取DropDownList3的数据
function XmlPost3(obj)
{
var svalue = obj.value;
var webFileUrl = "?cityid=" + svalue;
var result = "";
var xmlHttp = new ActiveXObject("MSXML2.XMLHTTP");
xmlHttp.open("POST", webFileUrl, false);
xmlHttp.send("");
result = xmlHttp.responseText;
if(result != "")
{
document.all("DropDownList3").length=0;
var piArray = result.split(",");
for(var i=0;i<piArray.length;i++)
{
var ary1 = piArray[i].toString().split("|");
document.all("DropDownList3").options.add(new Option(ary1[1].toString(),ary1[0].toString()));
}
}
else
{
alert(result);
}
}
function getData()
{
var province=document.getElementById("DropDownList1");
var pindex = province.selectedIndex;
var pValue = province.options[pindex].value;
var pText = province.options[pindex].text;
var city=document.getElementById("DropDownList2");
var cindex = city.selectedIndex;
var cValue = city.options[cindex].value;
var cText = city.options[cindex].text;
var area=document.getElementById("DropDownList3");
var aindex = area.selectedIndex;
var aValue = area.options[aindex].value;
var aText = area.options[aindex].text;
var txt=document.getElementById("TextBox1");
document.getElementById("<%=TextBox1.ClientID%>").innerText="省:"+pValue+"|"+pText+"市:"+cValue+"|"+cText+"区:"+aValue+"|"+aText;
}
//-->
</SCRIPT>
</form>
</body>
</HTML>
cs:
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
public partial class XmlHttpSelect : System.Web.UI.Page
{
public static string ConnectionString = System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"];
GetDataSet#region GetDataSet
public static DataSet GetDataSet(string sql)
{
SqlDataAdapter sda = new SqlDataAdapter(sql, ConnectionString);
DataSet ds = new DataSet();
sda.Fill(ds);
return ds;
}
#endregion
property#region property
private string provinceid
{
get
{
if (ViewState["provinceid"] != null && ViewState["provinceid"].ToString() != "")
{
return ViewState["provinceid"].ToString();
}
else
{
if (Request["provinceid"] != null && Request["provinceid"].ToString() != "")
{
return Request["provinceid"];
}
else
{
return "";
}
}
}
set
{
ViewState["provinceid"] = value;
}
}
private string cityid
{
get
{
if (ViewState["cityid"] != null && ViewState["cityid"].ToString() != "")
{
return ViewState["cityid"].ToString();
}
else
{
if (Request["cityid"] != null && Request["cityid"].ToString() != "")
{
return Request["cityid"];
}
else
{
return "";
}
}
}
set
{
ViewState["provinceid"] = value;
}
}
#endregion
Page_Load#region Page_Load
protected void Page_Load(object sender, System.EventArgs e)
{
if (!this.IsPostBack)
{
this.down1_bind();
this.DropDownList1.Attributes.Add("onchange", "XmlPost2(this);");
this.DropDownList2.Attributes.Add("onchange", "XmlPost3(this);");
}
if (provinceid != "")
{
this.down2_bind(provinceid);
}
if (cityid != "")
{
this.down3_bind(cityid);
}
}
#endregion
down2_bind#region down2_bind
private void down2_bind(string id)
{
string mystr = "";
string sql = "select cityID,city from city where father = '" + id + "'";
DataSet ds = GetDataSet(sql);
if (ds.Tables[0].Rows.Count != 0)
{
for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
{
mystr += "," + ds.Tables[0].Rows[i][0].ToString() + "|" + ds.Tables[0].Rows[i][1].ToString();
}
mystr = mystr.Substring(1);
}
this.Response.Write(mystr);
this.Response.End();
}
#endregion
down3_bind#region down3_bind
private void down3_bind(string id)
{
string mystr = "";
string sql = "select areaID,area from area where father = '" + id + "'";
DataSet ds = GetDataSet(sql);
if (ds.Tables[0].Rows.Count != 0)
{
for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
{
mystr += "," + ds.Tables[0].Rows[i][0].ToString() + "|" + ds.Tables[0].Rows[i][1].ToString();
}
mystr = mystr.Substring(1);
}
this.Response.Write(mystr);
this.Response.End();
}
#endregion
down1_bind#region down1_bind
private void down1_bind()
{
string sql = "select provinceID,province from province";
DataSet ds = GetDataSet(sql);
this.DropDownList1.DataSource = ds;
this.DropDownList1.DataValueField = "provinceID";
this.DropDownList1.DataTextField = "province";
this.DropDownList1.DataBind();
}
#endregion
Web Form Designer generated code#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//
InitializeComponent();
base.OnInit(e);
}
/**//// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
}
#endregion
}
web.config
<appSettings>
<add key="ConnectionString" value="Data Source=A3161228A954417;Initial Catalog=DbHisTech501;Persist Security Info=True;User ID=sa;Password=sa;"></add>
</appSettings>
posted on
2007-03-03 14:52
ipusr
阅读(
355)
评论()
收藏
举报
浙公网安备 33010602011771号