使用Json.net进行序列化主要是为了解决成员对象循环引用的问题
给出一个例子:
要注意的有两点:
一是对要序列化的成员加上Attribute : [JsonProperty],要序列化的类为了循环引用要加上[DataContract(IsReference=true)]
二是[JsonConverter(typeof(MyIntQuoteConverter))],这个是指定转换协议,对一些特殊类型的变量比如时间,我们可以通过这个类改变他在序列化后的格式
[DataContract(IsReference=true)]
public class Programme {/// <summary>/// 构造函数/// </summary>public Programme(){}/// <summary>/// /// </summary>[JsonProperty][JsonConverter(typeof(MyIntQuoteConverter))]public virtual Int64 proid { get; set; }/// <summary>/// 节目名称/// </summary>[JsonProperty]public virtual string proname { get { return this.program_module.cl_pro_modulename; } set { proname = value; } }/// <summary>/// 节目日期/// </summary>[JsonProperty]public virtual string prodate { get; set; }/// <summary>/// 节目模板号/// </summary>[JsonProperty][JsonConverter(typeof(MyIntQuoteConverter))]public virtual int pro_moduleid { get; set; }/// <summary>/// 主持人列表/// </summary>[JsonProperty]public virtual IList<Host> host { get { return this.program_module.hostinfos; } set { host = value; } }/// <summary>/// 节目图片地址/// </summary>[JsonProperty]public virtual string pro_imgurl { get; set; }/// <summary>/// 节目图标地址/// </summary>[JsonProperty]public virtual string pro_thumbimgurl { get; set; }/// <summary>/// 嘉宾信息/// </summary>[JsonProperty]public virtual string guests { get; set; }/// <summary>/// 节目描述/// </summary>[JsonProperty]public virtual ProgramTopic proTopic { get; set; }/// <summary>/// yyyy-MM-dd HH:mm:ss,部分节目跨零点,但属于前一天的节目单,实际时间是一个带日期的详细时间,用于查询某天的节目单/// </summary>[JsonProperty][JsonConverter(typeof(MyJsonDateTimeConverter))]public virtual DateTime probegin { get; set; }/// <summary>/// yyyy-MM-dd HH:mm:ss,部分节目跨零点,但属于前一天的节目单,实际时间是一个带日期的详细时间,用于查询某天的节目单/// </summary>[JsonProperty][JsonConverter(typeof(MyJsonDateTimeConverter))]public virtual DateTime proend { get; set; }/// <summary>/// 当前时间/// </summary>[JsonProperty][JsonConverter(typeof(MyJsonDateTimeConverter))]public virtual DateTime procurrent { get { return DateTime.Now; } }/// <summary>/// 节目模板/// </summary>public virtual ProgrammeModule program_module { get; set; }/// <summary>/// 频率/// </summary>public virtual Radio radio { get; set; }/// <summary>/// 返回一个表示节目实际时间的字符串/// </summary>/// <returns></returns>public virtual string getProgrammePeriod(){string result = probegin.ToString("yyyy/MM/dd HH:mm") + "-" + proend.ToString("HH:mm");return result;}}public virtual string ToJson(var obj){StringWriter sw = new StringWriter();JsonSerializer serializer = JsonSerializer.Create(new JsonSerializerSettings{Converters = new JsonConverter[] { new MyJsonDateTimeConverter() },ReferenceLoopHandling = ReferenceLoopHandling.Serialize,NullValueHandling = NullValueHandling.Include,PreserveReferencesHandling = PreserveReferencesHandling.Objects,ContractResolver = new DefaultContractResolver()});using (JsonWriter jsonWriter = new JsonTextWriter(sw)){jsonWriter.Formatting = Formatting.Indented;serializer.Serialize(jsonWriter, obj);}return sw.ToString();}