1.html代码
<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 MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<INPUT style="Z-INDEX: 102; LEFT: 448px; WIDTH: 56px; POSITION: absolute; TOP: 80px; HEIGHT: 24px"
onclick="getData();" type="button" value="保存" id="Button1" name="Button1" runat="server">
<asp:TextBox id="TextBox1" style="Z-INDEX: 101; LEFT: 16px; POSITION: absolute; TOP: 80px" runat="server"
Width="424px"></asp:TextBox>
<asp:DropDownList id="DropDownList2" runat="server" style="Z-INDEX: 103; LEFT: 176px; POSITION: absolute; TOP: 120px"></asp:DropDownList>
<asp:DropDownList id="DropDownList1" runat="server" style="Z-INDEX: 104; LEFT: 16px; POSITION: absolute; TOP: 120px"></asp:DropDownList>
<asp:DropDownList id="DropDownList3" runat="server" style="Z-INDEX: 105; LEFT: 296px; POSITION: absolute; TOP: 120px"></asp:DropDownList><INPUT style="Z-INDEX: 106; LEFT: 8px; WIDTH: 160px; POSITION: absolute; TOP: 176px; HEIGHT: 22px"
type="hidden" size="21" id="hidprovince" runat="server"><INPUT style="Z-INDEX: 107; LEFT: 184px; POSITION: absolute; TOP: 176px" type="hidden"
id="hidcity" runat="server"><INPUT style="Z-INDEX: 108; LEFT: 360px; POSITION: absolute; TOP: 176px" type="hidden"
id="hidarea" runat="server">
<SCRIPT LANGUAGE="JavaScript">
<!--
//以XML求取DropDownList2的数据
function XmlPost2(obj)
{
var svalue = obj.value;
var webFileUrl = "?povinceid=" + 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;
document.Form1.hidprovince.value=pValue;
document.Form1.hidcity.value=cValue;
document.Form1.hidarea.value=aValue;
}
//-->
</SCRIPT>
</form>
</body>
</HTML>
2.cs代码
3.数据库area1.rar
4.Ajax实现无刷新三联动下拉框
5.源代码下载XmlHttpselect.rar