jquery ajax ashx返回值为空求解
各位大神帮我看个问题，
<body onload="funStateJudge();">
function funStateJudge() { $.ajax({ url: "Service/PassWordJudge.asmx/StateJudge", contentType: "application/json", dataType: "json", data: "{}", type: "POST", success: function (json) { //alert(json.d);//输出结果 if (json.d == "1") { document.getElementById("divState").style.visibility = "visible"; funGetUserData(); //显示获取登陆信息 } else { funShowpnlLogin(); document.getElementById("divState").style.visibility = "hidden"; } }, error: function (x, e) { alert(x.responseText); errorSolve(); //异常处理 } });}function funGetUserData() { $.ajax({ url: "Service/GetSessionValue.ashx", contentType: "application/json", dataType: "json", type: "POST", data: "{}", success: function (json) { // alert(json.UserName); //输出结果 // alert(json.UserAccount); //输出结果 document.getElementById("lbtnUserName").innerText = json.UserName; //显示输出用户姓名 document.getElementById("lbtnUserAccount").innerText = json.UserAccount; //显示输出用户帐号 }, error: function (x, e) { funGetUserData(); //重复调用，方式页面加载时调用失败{这里两个页面之间来回跳转时无规律的出现失败现象，返回结果为空，反复调用即可得到返回值。。求解} } });} public void ProcessRequest(HttpContext context) { context.Response.ContentType = "text/plain"; string strData = String.Format("{{UserName:\"{0}\",UserAccount:\"{1}\"}}", getUserName(), getUserAccount());//构建的json数据 //下面两句是用来测试前台向此页面发出的查询字符 context.Response.Write(strData); }