我的Common.js如下 //處理一般AJAX功能。function InvokeHander(url,type,data, onSuccess, onFailure) { ??? $.ajax({??????? url: url, //路徑??????? type: type, //請求方式??????? data: data, //請求的數據??????? dataType: "json",??????? contentType: "application/json;charset=utf-8",??????? beforeSend: function(x) {??????????? x.setRequestHeader("Content-Type", "application/json;");??????? },??????? success: function(result) {??????????? if (onSuccess) {??????????????? if (result.d != undefined)??????????????????? result = result.d;??????????????? onSuccess(result);??????????? } ??????? },??????? error: function(err) {??????????? if (onFailure) {??????????????? onFailure(err);??????????? }??????? } ??? }) } aspx頁面js如下 ?<script type="text/javascript" src="javascript/jquery-1.3.2.min.js"></script>??? <script type="text/javascript" src="javascript/Common.js"></script>??? <script type="text/javascript">??????? $(function() {??????????? $("#d1").change(function() { ??????????????? var did = $("#d1").find("option:selected").val();??????????????? if (did != "請選擇") {??????????????????? InvokeHander("TypeHandler.ashx","POST","{id:'"+did+"'}" ,??????????????????? function(result) {??????????????????????? if (result != null) {??????????????????????????? for (i = 0; i < result.length; i++) {??????????????????????????????? var item = result[i];??????????????????????????????? alert(item.TypeName); ??????????????????????????? } ??????????????????????? }??????????????????? },???????????? function(err) { ???????????????? alert('err');???????????? });??????????????? }??????????????? else { ??????????????? }??????????? }); ??????? });??? ??? </script> ? ashx文件如下： <%@ WebHandler Language="C#" class="TypeHandler" %> using System;using System.Web;using System.Data;using System.Data.SqlClient;using System.Collections;using System.Web.Script.Serialization;public class TypeHandler : IHttpHandler { ??? public void ProcessRequest(HttpContext context)??? { ??????? if (context.Request["id"] == null)//這里永久為null用Request.form["id"]也不行??????? {?????????? ??????? }??????? else??????? {??????????? context.Response.Write(GetType(decimal.Parse(context.Request["id"].ToString())));??????? }??????? ??? } ??? public bool IsReusable??? {??????? get??????? {??????????? return false;??????? } ??? } ??? public string GetType(decimal id)??? {??????? ArrayList arr = new ArrayList();??????? SqlConnection conn = new SqlConnection("server=PC-200911131211;database=petsdata;uid=sa;pwd=sa123456");??????? SqlDataAdapter da = new SqlDataAdapter("select * from infor_type2 where infor_type2_father='" + id + "'", conn);??????? DataSet ds = new DataSet();??????? da.Fill(ds);??????? for (int i = 0; i < ds.Tables[0].Rows.Count; i++)??????? {??????????? arr.Add(new {??????????????? TypeID = ds.Tables[0].Rows[i]["infor_type2_id"].ToString(),??????????????? TypeName=ds.Tables[0].Rows[i]["infor_type2_name"].ToString()??????????? ??????????? });??????? ??????? } ??????? JavaScriptSerializer serializer = new JavaScriptSerializer();??????? string result = serializer.Serialize(arr);??????? return result;????? ??? } ??? }??? 假如我把上面請求方法換成POST傳進去的data換成: "id="+did?，ashx用request.QueryString["id"]就一點問題都沒。 請博客園的高手幫幫我吧。。。。我看見CSDN上也有類似的情況，好像也沒解決。 地址：http://topic.csdn.net/u/20091126/17/a015820e-d41f-4689-b6fe-232a098c2699.html