用ProtoType框架完成的一个下拉框(asp:DropDownList)联动的AJAX的小例子,和初学者分享一下.
<script language="javascript" type="text/javascript" >
<!--
function goCity()
{
var url = "AreaHandler.ashx";
var father= $F(<%=ddlProvince.ClientID%>)
var pars = "ddl=province&father=" +father;
var myAjax = new Ajax.Request(
url,
{method: get, parameters: pars, onComplete: LoadCity}
);
}
function goArea()
{
var url = "AreaHandler.ashx";
var father= $F(<%=ddlCity.ClientID%>)
var pars = "ddl=city&father=" +father;
var myAjax = new Ajax.Request(
url,
{method: get, parameters: pars, onComplete: LoadArea}
);
}
function LoadCity(originalRequest)
{
var result=originalRequest.responseText;
var ddl=$(<%=ddlCity.ClientID%>)
FillDropDown(ddl,result);
if (ddl.length == 0){
$(<%=ddlArea.ClientID%>).length=0;
$(<%=ddlArea.ClientID%>).disabled = 1;
ddl.disabled = true;
}
else{
$(<%=ddlArea.ClientID%>).disabled = 0;
ddl.disabled = 0;
goArea();
}
}
function LoadArea(originalRequest)
{
var result=originalRequest.responseText;
var ddl=$(<%=ddlArea.ClientID%>)
FillDropDown(ddl,result);
if (ddl.length == 0)
ddl.disabled =1;
esle
ddl.disabled =0;
}
function FillDropDown(objDDL,result ){
var piArray = result.split(",");
objDDL.length=0;
for(var i=0;i<piArray.length;i++)
{
var ary1 = piArray[i].toString().split("|");
if (ary1.length >1 )
objDDL.options.add(new Option(ary1[1].toString(),ary1[0].toString()));
}
}
-->
