一种新的省市二级联动Javascript

省市数据表结构:
ID:Guid
CreationDate:DateTime
LastModified:DateTime
RecordState:Int
LabelID:Guid
LabelCode:Varchar
ParentID:Guid
Code:Varchar
ChineseText:Nvarchar
EnglishText:Varchar
SortKeyword:Varchar

// JScript 文件
 function initialize()
 {
   var xmlhttp;
    if(window.ActiveXObject)
    {
       xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
    else if(window.XMLHttpRequest)
    {
       xmlhttp=new XMLHttpRequest();
    }
    xmlhttp.onreadystatechange=function(){
        if(xmlhttp.readystate==4)//判断是否是完成状态
        {
            if(xmlhttp.status==200)//判断是否执行成功
            {
               document.getElementById("ProvinceTD").innerHTML=xmlhttp.responsetext;
            }
        }
    };
    xmlhttp.open("GET","GetData.aspx?type=Province",true);
    xmlhttp.send(null);
 }

 function initializeType()
 {
   var xmlhttp;
    if(window.ActiveXObject)
    {
       xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
    else if(window.XMLHttpRequest)
    {
       xmlhttp=new XMLHttpRequest();
    }
    xmlhttp.onreadystatechange=function(){
        if(xmlhttp.readystate==4)//判断是否是完成状态
        {
            if(xmlhttp.status==200)//判断是否执行成功
            {
               document.getElementById("TypeTD").innerHTML=xmlhttp.responsetext;
               document.getElementById("TypeTD").innerHTML=xmlhttp.responsetext;
            }
        }
    };
    xmlhttp.open("GET","GetData.aspx?type=ProductType",true);
    xmlhttp.send(null);
 } 

function changeProvince(proObj, cityObj)
{
    var xmlhttp;
    if(window.ActiveXObject)
    {
       xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
    else if(window.XMLHttpRequest)
    {
       xmlhttp=new XMLHttpRequest();
    }
    xmlhttp.onreadystatechange=function(){
        if(xmlhttp.readystate==4)//判断是否是完成状态
        {
            if(xmlhttp.status==200)//判断是否执行成功
            {
               document.getElementById(cityObj).innerHTML=xmlhttp.responsetext;
            }
        }
    };
    xmlhttp.open("GET","GetData.aspx?type="+document.getElementById(proObj).value,true);
    xmlhttp.send(null); 
}

 

 

GetData.aspx.cs

 

protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack) {
            //是否接收参数
            if (!string.IsNullOrEmpty(Request["type"])) {
                
                switch (Request["type"]) { 
                    //获取省份
                    case "Province":
                        if (Cache["Province"] == null)
                        {
                            List<XbDataLabelItem> ProvinceList = new List<XbDataLabelItem>();
                            List<string> SearchProv = new List<string>();
                            SearchProv.Add("ParentID='c02c099d-2098-41a3-99f4-23711aff5b88'");
                            ProvinceList = XbDataLabelBPM.SelectDataLabelItemList(SearchProv.ToArray(), "ChineseText,ID", "ChineseText", -1, 0, "ID");
                            StringBuilder SbProvince = new StringBuilder();
                            SbProvince.Append("<select name=\"SProvince\" id=\"SProvince\"  onchange=\"changeProvince('SProvince','CityTD');\">");
                            SbProvince.Append("<option value=''>请选择省份</option>");
                            for (int i = 0; i < ProvinceList.Count; i++)
                            {
                                SbProvince.Append("<option value='" + ProvinceList[i].ID + "'>" + ProvinceList[i].ChineseText + "</option>");
                            }
                            SbProvince.Append("</select>");
                            Cache.Insert("Province", SbProvince.ToString(), null, DateTime.Now.AddMinutes(5), TimeSpan.Zero);
                            Response.Write(Cache["Province"].ToString());
                            //Response.Write(SbProvince.ToString());
                        }
                        else
                        {
                            Response.Write(Cache["Province"].ToString());
                        }
                        break;
                    //默认无返回
                    default:
                        //如果传入为GUID,刚返回下线数据,主要为省市二级联动服务
                        try
                        {
                            new Guid(Request["type"].ToString());
                            List<XbDataLabelItem> CityList = new List<XbDataLabelItem>();
                            List<string> SearchCity = new List<string>();
                            SearchCity.Add("ParentID='" + Request["type"].ToString() + "'");
                            CityList = XbDataLabelBPM.SelectDataLabelItemList(SearchCity.ToArray(), "ChineseText,ID", "ChineseText", -1, 0, "ID");
                            StringBuilder SbCity = new StringBuilder();
                            SbCity.Append("<select name=\"SCity\" id=\"SCity\">");
                            SbCity.Append("<option value=''>请选择城市</option>");
                            for (int i = 0; i < CityList.Count; i++) {
                                SbCity.Append("<option value='" + CityList[i].ID + "'>" + CityList[i].ChineseText + "</option>");
                            }
                            SbCity.Append("</select>");
                            Response.Write(SbCity.ToString());
                        }
                        catch { }
                        break;
                }
            }
        }
    }