首页：
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Webjax.aspx.cs" Inherits="sanjiliandong.Webjax" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script src="jquery-1.9.1.js" type="text/javascript"></script>
<script type="text/javascript">
$(function () {
$.ajax({
type: "post",
contentType: "application/json",
url: "WebService1.asmx/GetListPro",
data: "{}",
success: function (result) {
var stroption = '';
for (var i = 0; i < result.d.length; i++) {
stroption += '<option value=' + result.d[i].provinceID + '>';
stroption += result.d[i].provincename;
stroption += '</option>';
}
$('#SePro').append(stroption);
}
})
$("#SePro").change(function () {
$("#SeCity option:gt(0)").remove();
$.ajax({
type: "post",
url: "WebService1.asmx/GetListCity",
data: "{proid:'" + $('#SePro').val() + "'}",
success: function (result) {
var stroption = '';
for (var i = 0; i < result.d.length; i++) {
stroption += '<option value=' + result.d[i].cityID + '>';
stroption += result.d[i].cityname;
stroption += '</option>';
}
$('#SeCity').append(stroption);
}
})
})
$("#SeCity").change(function () {
$("#SeArea option:gt(0)").remove();
$.ajax({
type: "post",
url: "WebService1.asmx/GetListArea",
data: "{areaid:'" + $('#SeCity').val() + "'}",
success: function (result) {
var stroption = '';
for (var i = 0; i < result.d.length; i++) {
stroption += '<option value=' + result.d[i].areaID + '>';
stroption += result.d[i].areaname;
stroption += '</option>';
}
$('#SeArea').append(stroption);
}
})
})
})
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<select id="SePro">
<option>--请选择--</option>
</select>
<select id="SeCity">
<option>--请选择--</option>
</select>
<select id="SeArea">
<option>--请选择--</option>
</select>
</div>
</form>
</body>
</html>
WebService1.asmx后台
public List<Model.province> GetListPro()
{
BLL.province pro = new BLL.province();
List<Model.province> listpro= pro.GetListModel();
return listpro;
}
[WebMethod]
public List<Model.city> GetListCity(string proid)
{
BLL.city city = new BLL.city();
List<Model.city> listcity = city.GetListModel("father='" + proid + "'");
return listcity;
}
[WebMethod]
public List<Model.area> GetListArea(string areaid)
{
BLL.area area = new BLL.area();
List<Model.area> listcity = area.GetListModel("father='" + areaid + "'");
return listcity;
}
DAL中：
province.cs
public System.Collections.Generic.List<Model.province> GetListModel()
{
System.Collections.Generic.List<Model.province> list = new System.Collections.Generic.List<Model.province>();
DataTable dt = GetList("").Tables[0];
foreach (DataRow row in dt.Rows)
{
Model.province mpro = new Model.province();
mpro.id = Convert.ToInt32(row["id"]);
mpro.provinceID = row["provinceID"].ToString();
mpro.provincename = row["provincename"].ToString();
list.Add(mpro);
}
return list;
}
public System.Collections.Generic.List<Model.city> GetListModel(string proid)
{
List<Model.city> list = new List<Model.city>();
DataTable dt = GetList(proid).Tables[0];
foreach(DataRow row in dt.Rows)
{
Model.city city = new Model.city();
city.id = Convert.ToInt32(row["id"]);
city.cityID = row["cityID"].ToString();
city.cityname = row["cityname"].ToString();
list.Add(city);
}
return list;
}
public System.Collections.Generic.List<Model.area> GetListModel(string areaid) { DataTable dt = GetList(areaid).Tables[0]; List<Model.area> list = new List<Model.area>(); foreach(DataRow row in dt.Rows) { Model.area area = new Model.area(); area.id= Convert.ToInt32(row["id"]); area.areaID = row["areaID"].ToString(); area.areaname = row["areaname"].ToString(); list.Add(area); } return list; }
原文链接：https://www.f2er.com/ajax/166333.html