我用2003的的一个项目 不能用ajax做了(不然我也不会在这里提问题鸟)我用js做鸟一个DropDownList无刷新联动,效果是出来鸟~~~但是当你DropDownList.SelectedItem.Value的时候取不到值(值是空的,因为是客户端添加的所以服务器端是怎么都取不到值)我现在的问题就是 怎么把这个值取到~~~下面是我js代码
function load(){
var drp2 = document.getElementById("select2");
drp2.innerText="";
for(var i = 0;i<=drp2.options.length -1;i++){
drp2.remove(i);
}
var drp3 = document.getElementById("select3");
for(var i = 0;i<=drp3.options.length -1;i++){
drp3.remove(i);
}
var xmlhttp = new ActiveXObject("MSXML2.XMLHTTP");
var oDoc = new ActiveXObject("MSXML2.DOMDocument");
var state=document.getElementById("select1").value;
xmlhttp.open("POST", "zhongjian.aspx?rank="+state,false);
xmlhttp.send("");
var res=oDoc.loadXML(xmlhttp.responseText);
var naItems = oDoc.selectNodes("//Market/Table/sort");
var idItems = oDoc.selectNodes("//Market/Table/sort");
var item;
var id;
for (item = naItems.nextNode(),id=idItems.nextNode(); item&&id; item = naItems.nextNode(),id=idItems.nextNode()){
var nastr = item.nodeTypedValue;
var idstr = id.nodeTypedValue;
var newOption = document.createElement("OPTION");
newOption.text =nastr;
newOption.value = idstr;
drp2.options.add(newOption);
}
}
function load(){
var drp2 = document.getElementById("select2");
drp2.innerText="";
for(var i = 0;i<=drp2.options.length -1;i++){
drp2.remove(i);
}
var drp3 = document.getElementById("select3");
for(var i = 0;i<=drp3.options.length -1;i++){
drp3.remove(i);
}
var xmlhttp = new ActiveXObject("MSXML2.XMLHTTP");
var oDoc = new ActiveXObject("MSXML2.DOMDocument");
var state=document.getElementById("select1").value;
xmlhttp.open("POST", "zhongjian.aspx?rank="+state,false);
xmlhttp.send("");
var res=oDoc.loadXML(xmlhttp.responseText);
var naItems = oDoc.selectNodes("//Market/Table/sort");
var idItems = oDoc.selectNodes("//Market/Table/sort");
var item;
var id;
for (item = naItems.nextNode(),id=idItems.nextNode(); item&&id; item = naItems.nextNode(),id=idItems.nextNode()){
var nastr = item.nodeTypedValue;
var idstr = id.nodeTypedValue;
var newOption = document.createElement("OPTION");
newOption.text =nastr;
newOption.value = idstr;
drp2.options.add(newOption);
}
}
你可以调试,查看在写 XML之前看你返回的DataSet 结构。
蛮简单的...呵呵
Label1.Text=Request.Form["select2"];我这是个测试~~你把这段代码放在按钮中你就知道效果鸟~
Request.Form["你想要获取那个控件的id"] 呵呵 就这么简单.