Newtonsoft.Json解析数组的小例子

http://www.cnblogs.com/usharei/category/373071.html 有四篇很好的文章，建议学习下，但是现在的各种服务的json数据都是复杂类型的，本文只是补充一个复杂数据（数组）的小例子

上面提到的第四篇文章最后有个解析数组的例子，出现了 .First.First.First.First.Children(); 我表示很晕，网上找的的例子大多数是关于JObject的，但是我很少看到JArray的例子，其实解析json数组的时候是需要用到JArray的，复杂数据实际上是JObject和JArray的组合：{}对应的是JObject，而[]对应的是JArray。举个json的例子吧（数据来源是腾讯地图api的示例，解析的是北京某处的地理信息和周边信息，略长啊）

{
    "status": 0,"message": "query ok","result": {
        "address": "北京市海淀区彩和坊路海淀西大街74号","address_component": {
            "province": "北京市","city": "北京市","district": "海淀区","street": "彩和坊路","street_number": "海淀西大街74号"
        },"pois": [
            {
                "id": "3629720141162880123","title": "中国技术交易大厦","address": "北京市海淀区北四环西路66号","category": "房产小区;商务楼宇","location": {
                    "lat": "39.984122","lng": "116.307484"
                },"_distance": "3.6"
            },{
                "id": "2845372667492951071","title": "中国技术交易大厦A座","location": {
                    "lat": "39.984273","lng": "116.307577"
                },"_distance": "15.2"
            },{
                "id": "12925244666643621769","title": "中国技术交易大厦B座","location": {
                    "lat": "39.983902","lng": "116.307588"
                },"_distance": "29.3"
            },{
                "id": "7472400256925846331","title": "中国化工博物馆","address": "海淀区北四环西路62号中国化工集团大厦3楼(海淀桥西)","category": "文化场馆;博物馆","location": {
                    "lat": "39.984582","lng": "116.308877"
                },"_distance": "127.5"
            },{
                "id": "16243165360295251323","title": "贝塔咖啡","address": "北京市海淀区北四环西路66号中关村第三极大厦1层西北侧","category": "娱乐休闲;咖啡厅","location": {
                    "lat": "39.984391","lng": "116.307380"
                },"_distance": "28.0"
            },{
                "id": "7246616758286733108","title": "基督教堂","address": "北京市海淀区彩和坊路9号","category": "旅游景点;教堂","location": {
                    "lat": "39.983146","lng": "116.307507"
                },"_distance": "112.2"
            },{
                "id": "8627298709465036679","title": "北京三木和商店","address": "北京市海淀区北四环西路66号中关村文化商厦三层D-006-009单元","category": "购物;综合商场","location": {
                    "lat": "39.984093","lng": "116.307983"
                },"_distance": "42.6"
            },{
                "id": "12020256857742021617","title": "图书城昊海楼","address": "北京市海淀区海淀西街36号","category": "房产小区;住宅区;住宅小区","location": {
                    "lat": "39.984400","lng": "116.306794"
                },"_distance": "65.4"
            },{
                "id": "10394251724976454044","title": "北京点点酷东东商贸中心海淀分部","address": "北京市海淀区北四环西路66号中关村文化商厦2B001",{
                "id": "16427755502147943355","title": "北京资源燕园宾馆","address": "北京市海淀区颐和园路1号","category": "酒店宾馆;星级酒店","location": {
                    "lat": "39.986712","lng": "116.305822"
                },"_distance": "318.3"
            }
        ]
    }
}

HttpWebRequest request = (HttpWebRequest)result.AsyncState;
HttpWebResponse response = (HttpWebResponse)(request.EndGetResponse(result));
stream = response.GetResponseStream();
StreamReader reader = new StreamReader(stream,false);
string apiText = reader.ReadToEnd();
JObject jsonObj = null;
try
{
    jsonObj = JObject.Parse(apiText);
    if (jsonObj.Count == 1 || (int)(jsonObj["status"]) != 0) this.isError = true;
    else
    {
        string provinceName = (string)jsonObj["result"]["address_component"]["province"];
        string cityName = this.cityName_s = (string)jsonObj["result"]["address_component"]["city"];
        string districtName = (string)jsonObj["result"]["address_component"]["district"];
        string street = (string)jsonObj["result"]["address_component"]["street"];

        /*下面是解析JArray的部分*/
        JArray jlist = JArray.Parse(jsonObj["result"]["pois"].ToString()); //将pois部分视为一个JObject，JArray解析这个JObject的字符串
        LocationItem locationitem = null;      //存储附近的某个地点的信息
        locations = new List<LocationItem>();  //附近位置的列表
        for(int i = 0; i < jlist.Count ; ++i)  //遍历JArray
        {
            locationitem = new LocationItem();
            JObject tempo = JObject.Parse(jlist[i].ToString());
            locationitem.id = tempo["id"].ToString();
            locationitem.title = tempo["title"].ToString();
            locationitem._distance = tempo["_distance"].ToString();
            locationitem.address = tempo["address"].ToString();
            locationitem.category = tempo["category"].ToString();
            locationitem.location.lat = tempo["location"]["lat"].ToString();
            locationitem.location.lng = tempo["location"]["lng"].ToString();
            locations.Add(locationitem);
        }
    }
}
catch (Exception)
{
    isError = true;
}

public class LngLat
    {
        public string lat { get; set; }
        public string lng { get; set; }
    }
    public class LocationItem
    {
        public string id{get;set;} //
        public string title { get; set; } //名称
        public string address { get; set; } //地址
        public string category { get; set; } //类型
        public LngLat location { get; set; } //经纬度
        public string _distance { get; set; } //距离（米）

        public LocationItem()
        {
            id = "0";
            title = "";
            address = "";
            _distance = "0";
            location = new LngLat { lng = "0",lat = "0" };
            category = "";
        }
    }

（编辑：李大同）

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