我用的方法是这个 Response.Write(Request.Form["DropDownList2"]);文件 :aa.ascxcs 代码
Ajax.Utility.RegisterTypeForAjax(typeof(AjaxMethod));
if(!Page.IsPostBack)
{
this.DropDownList1.DataSource=AjaxMethod.GetPovinceList();
this.DropDownList1.DataTextField="province";
this.DropDownList1.DataValueField="provinceID";
this.DropDownList1.DataBind();
this.DropDownList1.Attributes.Add("onclick","cityResult();");
this.DropDownList2.Attributes.Add("onclick","areaResult();");
}js代码<SCRIPT language="javascript">
//城市------------------------------
function cityResult()
{
var city=document.getElementById("aa1_DropDownList1");
AjaxMethod.GetCityList(city.value,get_city_Result_CallBack);
}
function get_city_Result_CallBack(response)
{
if (response.value != null)
{
//debugger;
document.all("aa1_DropDownList2").length=0;
var ds = response.value;
if(ds != null && typeof(ds) == "object" && ds.Tables != null)
{
for(var i=0; i<ds.Tables[0].Rows.length; i++)
{
var name=ds.Tables[0].Rows[i].city;
var id=ds.Tables[0].Rows[i].cityID;
document.all("aa1_DropDownList2").options.add(new Option(name,id));
}
}
}
return
}
//市区----------------------------------------
function areaResult()
{
var area=document.getElementById("aa1_DropDownList2");
AjaxMethod.GetAreaList(area.value,get_area_Result_CallBack);
}
function get_area_Result_CallBack(response)
{
if (response.value != null)
{
document.all("aa1_DropDownList3").length=0;
var ds = response.value;
if(ds != null && typeof(ds) == "object" && ds.Tables != null)
{
for(var i=0; i<ds.Tables[0].Rows.length; i++)
{
var name=ds.Tables[0].Rows[i].area;
var id=ds.Tables[0].Rows[i].areaID;
document.all("aa1_DropDownList3").options.add(new Option(name,id));
}
}
}
return
}
function getData()
{
var province=document.getElementById("aa1_DropDownList1");
var pindex = province.selectedIndex;
var pValue = province.options[pindex].value;
var pText = province.options[pindex].text;
var city=document.getElementById("aa1_DropDownList2");
var cindex = city.selectedIndex;
var cValue = city.options[cindex].value;
var cText = city.options[cindex].text;
var area=document.getElementById("aa1_DropDownList3");
var aindex = area.selectedIndex;
var aValue = area.options[aindex].value;
var aText = area.options[aindex].text;
var txt=document.getElementById("aa1_TextBox1"); }
Ajax.Utility.RegisterTypeForAjax(typeof(AjaxMethod));
if(!Page.IsPostBack)
{
this.DropDownList1.DataSource=AjaxMethod.GetPovinceList();
this.DropDownList1.DataTextField="province";
this.DropDownList1.DataValueField="provinceID";
this.DropDownList1.DataBind();
this.DropDownList1.Attributes.Add("onclick","cityResult();");
this.DropDownList2.Attributes.Add("onclick","areaResult();");
}js代码<SCRIPT language="javascript">
//城市------------------------------
function cityResult()
{
var city=document.getElementById("aa1_DropDownList1");
AjaxMethod.GetCityList(city.value,get_city_Result_CallBack);
}
function get_city_Result_CallBack(response)
{
if (response.value != null)
{
//debugger;
document.all("aa1_DropDownList2").length=0;
var ds = response.value;
if(ds != null && typeof(ds) == "object" && ds.Tables != null)
{
for(var i=0; i<ds.Tables[0].Rows.length; i++)
{
var name=ds.Tables[0].Rows[i].city;
var id=ds.Tables[0].Rows[i].cityID;
document.all("aa1_DropDownList2").options.add(new Option(name,id));
}
}
}
return
}
//市区----------------------------------------
function areaResult()
{
var area=document.getElementById("aa1_DropDownList2");
AjaxMethod.GetAreaList(area.value,get_area_Result_CallBack);
}
function get_area_Result_CallBack(response)
{
if (response.value != null)
{
document.all("aa1_DropDownList3").length=0;
var ds = response.value;
if(ds != null && typeof(ds) == "object" && ds.Tables != null)
{
for(var i=0; i<ds.Tables[0].Rows.length; i++)
{
var name=ds.Tables[0].Rows[i].area;
var id=ds.Tables[0].Rows[i].areaID;
document.all("aa1_DropDownList3").options.add(new Option(name,id));
}
}
}
return
}
function getData()
{
var province=document.getElementById("aa1_DropDownList1");
var pindex = province.selectedIndex;
var pValue = province.options[pindex].value;
var pText = province.options[pindex].text;
var city=document.getElementById("aa1_DropDownList2");
var cindex = city.selectedIndex;
var cValue = city.options[cindex].value;
var cText = city.options[cindex].text;
var area=document.getElementById("aa1_DropDownList3");
var aindex = area.selectedIndex;
var aValue = area.options[aindex].value;
var aText = area.options[aindex].text;
var txt=document.getElementById("aa1_TextBox1"); }
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