WP7 Json 解析那些事儿(上)

Windows Phone7中,我们查阅msdn首先得到的是System.Runtime.Serialization.Json空间下的DataContractJsonSerializer 类,没错,最简单最方便的就是微软自带的这个类.可以通过这个类轻松的将对象序列化为 JSON，或者将 JSON 数据反序列化为对象。但是这个类解析的时候有缺陷,后面的文章再提.

话不多说,直接切入正题,使用方法:

1.引入System.ServiceModel.Web.dll

2.using System.Runtime.Serialization.Json;

3.代码部分:

    internal static class JsonParse
    {
        public static T Parse<T>(Stream stream)
        {
            return JsonParse._parse<T>(stream);
        }

        //从Json串解析
        private static T _parse<T>(Stream stream)
        {
            return (T)new DataContractJsonSerializer(typeof(T)).ReadObject(stream);
        }

        //将某个序列类合并成Json串,参见:htt p://m s dn.microsoft.com/en-us/library/bb908432(v=VS.96).aspx
        public static string constructJsonString(object jsonObject)
        {
            using (var ms = new MemoryStream())
            {
                new DataContractJsonSerializer(jsonObject.GetType()).WriteObject(ms, jsonObject);
                byte[] byteArr = ms.ToArray();
                return Encoding.UTF8.GetString(byteArr, 0, byteArr.Length);
            }
        }
    }

自此,Json的解析工具类制作完毕
接下来,需要构建一个序列类来测试这个解析工具函数:

            string strJson = @"{'cid':7,'v':'2.0.7.20100715173500','nb':true,'p':true,'l':true,
                                            'xq':true,'ms':[{'msi':1,'n':'租房','nb':true,'p':true,'l':true,'xq':true},
                                             {'msi':5,'n':'二手房','nb':true,'p':true,'l':true,'xq':true},
                                            {'msi':3,'n':'合租房','nb':true,'p':true,'l':true,'xq':true},
                                            {'msi':10,'n':'日租房\/短期租房','nb':false,'p':true,'l':true,'xq':false},
                                            {'msi':2,'n':'求租房','nb':false,'p':true,'l':true,'xq':false},
                                            {'msi':4,'n':'二手房求购','nb':false,'p':true,'l':true,'xq':false},
                                            {'msi':6,'n':'商铺出租\/求租','nb':false,'p':true,'l':true,'xq':false},
                                            {'msi':7,'n':'商铺出售\/求购','nb':false,'p':true,'l':true,'xq':false},
                                            {'msi':8,'n':'写字楼出租\/求租','nb':false,'p':true,'l':true,'xq':false},
                                            {'msi':9,'n':'写字楼出售\/求购','nb':false,'p':true,'l':true,'xq':false},
                                            {'msi':11,'n':'厂房\/仓库\/土地','nb':false,'p':false,'l':true,'xq':false}],
                                            'n':'房产',
                                            's':3}";

            MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(strJson));
            SubCategory subCategoryObj = JsonParse.Parse<SubCategory>(ms);

SubCategory类是根据Json串定义的序列类:

    [DataContract]
    public class SubCategoryItem
    {
        [DataMember(Order = 0)]
        public int msi { get; set; }
        [DataMember(Order = 1)]
        public string n { get; set; }
        [DataMember(Order = 2)]
        public bool nb { get; set; }
        [DataMember(Order = 3)]
        public bool p { get; set; }
        [DataMember(Order = 4)]
        public bool l { get; set; }
        [DataMember(Order = 5)]
        public bool xq { get; set; }
    }
    //详细:htt p://msdn.microsoft.com/zh-cn/library/bb412179.aspx
    [DataContract]
    public class SubCategory
    {
        [DataMember(Order = 0)]
        public int cid { get; set; }
        [DataMember(Order = 1)]
        public string v { get; set; }
        [DataMember(Order = 2)]
        public bool nb { get; set; }
        [DataMember(Order = 3)]
        public bool p { get; set; }
        [DataMember(Order = 4)]
        public bool l { get; set; }
        [DataMember(Order = 5)]
        public bool xq { get; set; }
        [DataMember(Order = 6)]
        public SubCategoryItem[] ms { get;set; }//都是按照名字解析的
        [DataMember(Order = 7)]
        public string n { get; set; }
        [DataMember(Order = 8)]
        public int s { get; set; }

    }

代码经过本人测试