C# 使用json

本人使用的VS2010 需要下載的是 ：Json50r6.zip C#5使用；

網上還有一個版本：Newtonsoft.Json.rar 這個只有在C#6才能使用；

下載解壓以后應用看自己的.net版本引用，本人引用的是

使用很方便：

反序列化：

          string jsonText = "{\"zone\":\"海淀\",\"zone_en\":\"haidian\"}";

            JObject jo = (JObject)JsonConvert.DeserializeObject(jsonText);
            string zone = jo["zone"].ToString();
            string zone_en = jo["zone_en"].ToString();
            //LogUtil.LogInfo(zone);
            //LogUtil.LogInfo(zone_en);

序列化：

首先新建一個類

 class a
        {
            /// <summary>
            /// 定義實體轉換名字
            /// </summary>
            [JsonProperty(PropertyName = "CName")]
            public string s;
            [JsonIgnore]//忽略的屬性
            public string d;
            [JsonConverter(typeof(ChinaDateTimeConverter))]
            [JsonProperty]//支持非公共屬性
            DateTime dd;
            public DateTime dt;
            [JsonConverter(typeof(BoolConvert))]
            public bool b;
            [DefaultValue(10)]//默認值
            int x;
        }

里面涉及到了時間格式的轉化和bool類型的轉換（true轉為是，false轉為否），需要重寫兩個類：

//時間類轉換

public class ChinaDateTimeConverter : DateTimeConverterBase
    {
        private static IsoDateTimeConverter dtConverter = new IsoDateTimeConverter { DateTimeFormat = "yyyy-MM-dd" };//可以自己修改

        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
        {
            return dtConverter.ReadJson(reader, objectType, existingValue, serializer);
        }

        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
        {
            dtConverter.WriteJson(writer, value, serializer);
        }
    }  

//bool類轉化

public class BoolConvert : JsonConverter
    {
        private string[] arrBString { get; set; }

        public BoolConvert()
        {
            arrBString = "是,否".Split(',');
        }

        /// <summary>  
        /// 構造函數  
        /// </summary>  
        /// <param name="BooleanString">將bool值轉換成的字符串值</param>  
        public BoolConvert(string BooleanString)
        {
            if (string.IsNullOrEmpty(BooleanString))
            {
                throw new ArgumentNullException();
            }
            arrBString = BooleanString.Split(',');
            if (arrBString.Length != 2)
            {
                throw new ArgumentException("BooleanString格式不符合規定");
            }
        }

        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
        {
            bool isNullable = IsNullableType(objectType);
            Type t = isNullable ? Nullable.GetUnderlyingType(objectType) : objectType;

            if (reader.TokenType == JsonToken.Null)
            {
                if (!IsNullableType(objectType))
                {
                    throw new Exception(string.Format("不能轉換null value to {0}.", objectType));
                }

                return null;
            }

            try
            {
                if (reader.TokenType == JsonToken.String)
                {
                    string boolText = reader.Value.ToString();
                    if (boolText.Equals(arrBString[0], StringComparison.OrdinalIgnoreCase))
                    {
                        return true;
                    }
                    else if (boolText.Equals(arrBString[1], StringComparison.OrdinalIgnoreCase))
                    {
                        return false;
                    }
                }

                if (reader.TokenType == JsonToken.Integer)
                {
                    //數值  
                    return Convert.ToInt32(reader.Value) == 1;
                }
            }
            catch (Exception ex)
            {
                throw new Exception(string.Format("Error converting value {0} to type '{1}'", reader.Value, objectType));
            }
            throw new Exception(string.Format("Unexpected token {0} when parsing enum", reader.TokenType));
        }

        /// <summary>  
        /// 判斷是否為Bool類型  
        /// </summary>  
        /// <param name="objectType">類型</param>  
        /// <returns>為bool類型則可以進行轉換</returns>  
        public override bool CanConvert(Type objectType)
        {
            return true;
        }

        public bool IsNullableType(Type t)
        {
            if (t == null)
            {
                throw new ArgumentNullException("t");
            }
            return (t.BaseType.FullName == "System.ValueType" && t.GetGenericTypeDefinition() == typeof(Nullable<>));
        }

        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
        {
            if (value == null)
            {
                writer.WriteNull();
                return;
            }

            bool bValue = (bool)value;

            if (bValue)
            {
                writer.WriteValue(arrBString[0]);
            }
            else
            {
                writer.WriteValue(arrBString[1]);
            }
        }
    }  

然后實例化類：

            a d = new a();
            d.s = "1";
            d.d = "2";
            d.dt = DateTime.Now;
            d.b = false;
            ///全局設置
            JsonSerializerSettings setting = new JsonSerializerSettings();
            setting.DateFormatHandling = DateFormatHandling.MicrosoftDateFormat;
            setting.DateFormatString = "yyyy-MM-dd HH:mm:ss";
            setting.NullValueHandling = NullValueHandling.Ignore;  //忽略空值
            setting.Converters.Add(new BoolConvert("是,否"));  
            string js = JsonConvert.SerializeObject(d, Formatting.Indented, setting);