jquery 中的ajax中回调函数的怎样用

Question

代码如下
: $(function() {
            $("#userid").blur(function() {
                if ($(this).val() != "") {
                    $.ajax({
                        type: "POST",
                        url: "UserRegister.aspx/ChangeID",
                        data: "{'id':'" + $(this).val() + "'}",
                        contentType: "application/json;charset=utf-8",
                        dataType: "text",
                        success: function(msg, dd, ss) {
                            alert(msg);
                        },
                        error: function(err) {
                            alert('获取信息失败');
                        }
                    })
                }            })
        })后台代码是:[System.Web.Services.WebMethod]
    public static  bool    ChangeID(string id)
    {
        LoginBll bll = new LoginBll();
        bool flag = bll.TrOrFa(id);        return flag;
    }
返回值alert(msg) 怎么是{"d":true}和{"d":false}; 我该怎样提出true和false呢?

Answer 1

 $(eval("(" + msg + ")").d)

Answer 2

msg = eval("(" + msg + ")");
alert(msg.d);

Answer 3

学习一下json数据就明白了  2楼正解 我就不写了

Answer 4

jQuery(function($) {
    var username = $("#username");
    var pwd = $("#pwd");
    var code = $("#code");
    $("#oalogin").click(function() {
    $.post("Ajax/Help/Ajax_Help.ashx?method=login&date=" + new Date().getTime(), { Action: "post", username: username.val(), pwd: pwd.val(), code: code.val()},
        function(data, textStatus) {
            if (data.result == 'Eok') {
                top.location.href = "index.aspx?a0e4=ee11cbb19052e40b07aac0ca060c23ee";
            }
            else if(data.result == 'Aok') { 
                top.location.href = "index.aspx?a0e4=21232f297a57a5a743894a0e4a801fc3";
            }
            else {
                        if(data.result=="Code")
                        {
                           showMsgErr("RegVerifyCode_info","");
                           pass=false;
                           return false;
                           checkform();
                        }
                        else if(data.result=="UP")
                        {
                          showMsgErr("loginid_info","");
                          showMsgErr("password_info","");
                          pass=false;
                          return false;
                          checkform();
                        }
                        else
                        {
                          checkform();
                        }
            }         }, "json");
    });
});

Answer 5

var StateID = $(this).parents('tr').attr('id'); 
$.ajax({ 
    url: 'Remote/State.cfc' 
    ,data: { 
        method:'Delete' 
        ,'StateID':StateID 
    } 
    ,context: StateID 
    ,success: function(result){  
        alert(this);     // the value of StateID 
        alert(StateID);  // same as above 
         }; 
    } 
}); 

Answer 6

 <script language="javascript" type="text/javascript">
        function GetClientInfo() {
            var RepairNo = $.trim($("#txtRepairsNo").val());            if (RepairNo.length == 0) {
                //                alert('请输入报修单号！');
                return false;
            }
            $.get("../ashx/Handler.ashx?strstate=Entrance&strRepairNo=" + RepairNo, function(data) {
                if (data != "") {
                    var arrInfo = data.split(',');
                    $("#txtCarNo").val(arrInfo[0]);
                    $("#txtCarModel").val(arrInfo[1]);
                    $("#txtClientName").val(arrInfo[2]);
                    $("#txtLinkMan").val(arrInfo[3]);
                    $("#txtLinkManTel").val(arrInfo[4]);
                    $("#txtClientNo").val(arrInfo[5]);
                    $("#txtServerName").val(arrInfo[6]);
                   
                }
            });
        }
    </script> 

Answer 7

<%@ WebHandler Language="C#" Class="Handler" %>using System;
using System.Collections.Generic;
using System.Web;
using System.Data;
using System.Data.Common;
using System.Data.SqlClient;
using GarageWebService;
public class Handler : IHttpHandler {
    
    public void ProcessRequest (HttpContext context) {
        context.Response.ContentType = "text/plain";        if (context.Request.HttpMethod == "GET")
        {
            //string strNo = context.Request.QueryString["strRepairNo"].ToString();
           // string strstate=context.Request.QueryString["strstate"].ToString();
           string strstate = "InitTask";
           string strNo = "1000141252";
            if (strstate == "Entrance")
            {
                //string strNo = "1000141252";
                if (!string.IsNullOrEmpty(strNo))
                {                    GarageWebService.TYMics2CarInfo GetFristTaskinfo = new GarageWebService.TYMics2CarInfo();
                    DataTable dt = GetFristTaskinfo.GetFristTaskInfo(strNo);
                    if (dt == null)
                    {
                        context.Response.Write("<script>alert('取到的值为空！');</script>");
                    }
                    else
                    {
                        DataRow row = dt.Rows[0];
                        context.Response.Write(row["vehicleNumber"].ToString() + ","
                            + row["vehicleTypeNumber"].ToString() + ","
                            + row["people"].ToString() + ","
                            + row["person"].ToString() + ","
                            + row["phone"].ToString() + ","
                            + row["ClientID"].ToString() + ","
                            + row["operationName"].ToString());
                        // + "," + row["ClientID"].ToString()
                        // + row["bulletinRepair"].ToString() + ",
                        //
                    }
                }
            }
            if (strstate == "InitTask")
            {
                if (!string.IsNullOrEmpty(strNo))
                {                    GarageWebService.TYMics2CarInfo GetFristTaskinfo = new GarageWebService.TYMics2CarInfo();
                    DataTable dt = GetFristTaskinfo.GetFristTaskInfo(strNo);
                    if (dt == null)
                    {
                        context.Response.Write("<script>alert('取到的值为空！');</script>");
                    }
                    else
                    {
                        DataRow row = dt.Rows[0];
                        context.Response.Write(row["vehicleNumber"].ToString() + ","
                            + row["vehicleTypeNumber"].ToString() + ","
                            + row["people"].ToString() + ","
                            + row["person"].ToString() + ","
                            + row["phone"].ToString() + ","
                            + row["operationName"].ToString() + ","
                            + row["bulletinRepair"].ToString() + ","
                            + row["bulletinRepair"].ToString());
                        // + "," + row["ClientID"].ToString()
                        // + row["bulletinRepair"].ToString() + ",
                        //
                    }
                }
                
            }
        }
        
    }
 
    public bool IsReusable {
        get {
            return false;
        }
    }}