Dynamic动态Json解析帮助类,C#动态解析JSON方法,

不用model直接解析JSON,方便快捷的首选方式,

Dynamic动态解析JSON代码量最起码减少一半


DynJsonHelper 全称为DynamicJsonHelper
中文简称:动态Json解析帮助类
开始封装时间:2016.3.30(持续更新中)
适用版本:.NET Framework 4.0以上版本(包含.NET4.0)
核心技术:运用Dynamic特性将json字符串自动转换为Dynamic Object实现动态解析json数组
核心理念:采用动态解析json数据的方式,去除.Net中对Model实体对象封装,
               达到节约时间成本、精简代码、提高开发效率的目的
调用方法:暂时封装了两个实用方法
               Json字符串转为Json对象 : DynJsonHelper.ToObject(Json字符串);
               数组/对象转为Json字符串:DynJsonHelper.ToJson(数组/对象);


DynJsonHelper源码下载

using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.Dynamic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.Serialization.Json;
using System.Text;
using System.Xml;
using System.Xml.Linq;

namespace AutoHome.JsonDynamic
{
    /**
     * DynJsonHelper 全称为DynamicJsonHelper
     * 中文简称:动态Json解析帮助类
     * 开始封装时间:2016.3.30(持续更新中)
     * 适用版本:.NET Framework 4.0以上版本(包含.NET4.0)
     * 核心技术:运用Dynamic特性将json字符串自动转换为Dynamic Object实现动态解析json数组
     * 核心理念:采用动态解析json数据的方式,去除.Net中对Model实体对象封装,
     *          达到节约时间成本、精简代码、提高开发效率的目的
     * 调用方法:暂时封装了两个实用方法
     *          Json字符串转为Json对象 : DynJsonHelper.ToObject(Json字符串);
     *          数组/对象转为Json字符串:DynJsonHelper.ToJson(数组/对象);
     * 
     * 
     * **/
    public class DynJsonHelper : DynamicObject
    {

        #region Json操作方法
        /// <summary>
        /// 把Json字符串转为Json对象
        /// </summary>
        /// <param name="json">String类型 符合Json规范的字符串</param>
        /// <returns>Json对象或Json数组List</returns>
        public static dynamic ToObject(string json)
        {
            return ToObject(json, Encoding.Unicode);
        }
        /// <summary>
        /// 把Json字符串转为Json对象(可自定义编码)
        /// </summary>
        /// <param name="json">String类型 符合Json规范的字符串</param>
        ///  <param name="encoding">自定义编码</param>
        /// <returns>Json对象或Json数组List</returns>
        public static dynamic ToObject(string json, Encoding encoding)
        {
            try
            {
                using (var reader = JsonReaderWriterFactory.CreateJsonReader(encoding.GetBytes(json), XmlDictionaryReaderQuotas.Max))
                {
                    return ToValue(XElement.Load(reader));
                }
            }
            catch (Exception exc) { return exc.Message; }
        }
        /// <summary>
        /// 把Stream类型的Json数据转为Json对象
        /// </summary>
        /// <param name="stream">Stream类型Json数据</param>
        /// <returns>Json对象或Json数组List</returns>
        public static dynamic ToObject(Stream stream)
        {
            try
            {
                using (var reader = JsonReaderWriterFactory.CreateJsonReader(stream, XmlDictionaryReaderQuotas.Max))
                {
                    return ToValue(XElement.Load(reader));
                }
            }
            catch (Exception exc) { return exc.Message; }
        }
        /// <summary>
        /// 把Stream类型的Json数据转为Json对象
        /// </summary>
        /// <param name="stream">Stream类型Json数据</param>
        /// <param name="encoding">自定义编码</param>
        /// <returns>Json对象或Json数组List</returns>
        public static dynamic ToObject(Stream stream, Encoding encoding)
        {
            try
            {
                using (var reader = JsonReaderWriterFactory.CreateJsonReader(stream, encoding, XmlDictionaryReaderQuotas.Max, _ => { }))
                {
                    return ToValue(XElement.Load(reader));
                }
            }
            catch (Exception exc) { return exc.Message; }
        }
        /// <summary>
        /// 把对象或者List数组转为Json字符串(支持复杂对象转换)
        /// </summary>
        /// <param name="obj">object</param>
        /// <returns>Json字符串</returns>
        public static string ToJson(object obj)
        {
            return CreateJsonString(new XStreamingElement("root", CreateTypeAttr(GetJsonType(obj)), CreateJsonNode(obj)));
        }
        #endregion

        #region 私有方法
        /// <summary>
        /// 枚举定义Json类型
        /// </summary>
        private enum JsonType
        {
            @string, number, boolean, @object, array, @null
        }
        /// <summary>
        /// 处理不同类型的Value
        /// </summary>
        /// <param name="element"></param>
        /// <returns></returns>
        private static dynamic ToValue(XElement element)
        {
            var type = (JsonType)Enum.Parse(typeof(JsonType), element.Attribute("type").Value);
            switch (type)
            {
                case JsonType.boolean:
                    return (bool)element;
                case JsonType.number:
                    return (double)element;
                case JsonType.@string:
                    return (string)element;
                case JsonType.@object:
                case JsonType.array:
                    return new DynJsonHelper(element, type);
                case JsonType.@null:
                default:
                    return null;
            }
        }
        /// <summary>
        /// 获取Json字段类型
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        private static JsonType GetJsonType(object obj)
        {
            if (obj == null) return JsonType.@null;

            switch (Type.GetTypeCode(obj.GetType()))
            {
                case TypeCode.Boolean:
                    return JsonType.boolean;
                case TypeCode.String:
                case TypeCode.Char:
                case TypeCode.DateTime:
                    return JsonType.@string;
                case TypeCode.Int16:
                case TypeCode.Int32:
                case TypeCode.Int64:
                case TypeCode.UInt16:
                case TypeCode.UInt32:
                case TypeCode.UInt64:
                case TypeCode.Single:
                case TypeCode.Double:
                case TypeCode.Decimal:
                case TypeCode.SByte:
                case TypeCode.Byte:
                    return JsonType.number;
                case TypeCode.Object:
                    return (obj is IEnumerable) ? JsonType.array : JsonType.@object;
                case TypeCode.DBNull:
                case TypeCode.Empty:
                default:
                    return JsonType.@null;
            }
        }

        private static XAttribute CreateTypeAttr(JsonType type)
        {
            return new XAttribute("type", type.ToString());
        }

        private static object CreateJsonNode(object obj)
        {
            var type = GetJsonType(obj);
            switch (type)
            {
                case JsonType.@string:
                case JsonType.number:
                    return obj;
                case JsonType.boolean:
                    return obj.ToString().ToLower();
                case JsonType.@object:
                    return CreateXObject(obj);
                case JsonType.array:
                    return CreateXArray(obj as IEnumerable);
                case JsonType.@null:
                default:
                    return null;
            }
        }
        private static IEnumerable<XStreamingElement> CreateXArray<T>(T obj) where T : IEnumerable
        {
            return obj.Cast<object>()
                .Select(o => new XStreamingElement("item", CreateTypeAttr(GetJsonType(o)), CreateJsonNode(o)));
        }
        private static IEnumerable<XStreamingElement> CreateXObject(object obj)
        {
            return obj.GetType()
                .GetProperties(BindingFlags.Public | BindingFlags.Instance)
                .Select(pi => new { Name = pi.Name, Value = pi.GetValue(obj, null) })
                .Select(a => new XStreamingElement(a.Name, CreateTypeAttr(GetJsonType(a.Value)), CreateJsonNode(a.Value)));
        }
        private static string CreateJsonString(XStreamingElement element)
        {
            try
            {
                using (var ms = new MemoryStream())
                using (var writer = JsonReaderWriterFactory.CreateJsonWriter(ms, Encoding.Unicode))
                {
                    element.WriteTo(writer);
                    writer.Flush();
                    return Encoding.Unicode.GetString(ms.ToArray());
                }
            }
            catch (Exception exc) { return exc.Message; }
        }
        //动态处理对象和数组List
        readonly XElement xml;
        readonly JsonType jsonType;
        /// <summary>
        /// 创建无参构造函数
        /// </summary>
        public DynJsonHelper()
        {
            xml = new XElement("root", CreateTypeAttr(JsonType.@object));
            jsonType = JsonType.@object;
        }
        private DynJsonHelper(XElement element, JsonType type)
        {
            Debug.Assert(type == JsonType.array || type == JsonType.@object);
            xml = element;
            jsonType = type;
        }
        public bool IsObject { get { return jsonType == JsonType.@object; } }
        public bool IsArray { get { return jsonType == JsonType.array; } }
        /// <summary>
        /// 类型属性验证
        /// </summary>
        /// <param name="name"></param>
        /// <returns></returns>
        public bool IsDefined(string name)
        {
            return IsObject && (xml.Element(name) != null);
        }
        /// <summary>
        /// 类型属性验证
        /// </summary>
        /// <param name="index"></param>
        /// <returns></returns>
        public bool IsDefined(int index)
        {
            return IsArray && (xml.Elements().ElementAtOrDefault(index) != null);
        }

        /// <summary>
        /// 删除属性
        /// </summary>
        /// <param name="name"></param>
        /// <returns></returns>
        public bool Delete(string name)
        {
            var elem = xml.Element(name);
            if (elem != null)
            {
                elem.Remove();
                return true;
            }
            else return false;
        }

        /// <summary>
        /// 删除属性
        /// </summary>
        /// <param name="index"></param>
        /// <returns></returns>
        public bool Delete(int index)
        {
            var elem = xml.Elements().ElementAtOrDefault(index);
            if (elem != null)
            {
                elem.Remove();
                return true;
            }
            else return false;
        }
        /// <summary>
        /// 映射到数组或类的公共属性名
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <returns></returns>
        public T Deserialize<T>()
        {
            return (T)Deserialize(typeof(T));
        }
        private object Deserialize(Type type)
        {
            return (IsArray) ? DeserializeArray(type) : DeserializeObject(type);
        }
        private dynamic DeserializeValue(XElement element, Type elementType)
        {
            var value = ToValue(element);
            if (value is DynJsonHelper)
            {
                value = ((DynJsonHelper)value).Deserialize(elementType);
            }
            return Convert.ChangeType(value, elementType);
        }
        private object DeserializeObject(Type targetType)
        {
            var result = Activator.CreateInstance(targetType);
            var dict = targetType.GetProperties(BindingFlags.Public | BindingFlags.Instance)
                .Where(p => p.CanWrite)
                .ToDictionary(pi => pi.Name, pi => pi);
            foreach (var item in xml.Elements())
            {
                PropertyInfo propertyInfo;
                if (!dict.TryGetValue(item.Name.LocalName, out propertyInfo)) continue;
                var value = DeserializeValue(item, propertyInfo.PropertyType);
                propertyInfo.SetValue(result, value, null);
            }
            return result;
        }
        private object DeserializeArray(Type targetType)
        {
            if (targetType.IsArray) // Jsons[]==>数组[]
            {
                var elemType = targetType.GetElementType();
                dynamic array = Array.CreateInstance(elemType, xml.Elements().Count());
                var index = 0;
                foreach (var item in xml.Elements())
                {
                    array[index++] = DeserializeValue(item, elemType);
                }
                return array;
            }
            else // Jsons<Foo>==>List
            {
                var elemType = targetType.GetGenericArguments()[0];
                dynamic list = Activator.CreateInstance(targetType);
                foreach (var item in xml.Elements())
                {
                    list.Add(DeserializeValue(item, elemType));
                }
                return list;
            }
        }
        /// <summary>
        /// 删除
        /// </summary>
        /// <param name="binder"></param>
        /// <param name="args"></param>
        /// <param name="result"></param>
        /// <returns></returns>
        public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)
        {
            result = (IsArray)
                ? Delete((int)args[0])
                : Delete((string)args[0]);
            return true;
        }
        /// <summary>
        /// 重写TryInvokeMember方法
        /// </summary>
        /// <param name="binder"></param>
        /// <param name="args"></param>
        /// <param name="result"></param>
        /// <returns></returns>
        public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)
        {
            if (args.Length > 0)
            {
                result = null;
                return false;
            }
            result = IsDefined(binder.Name);
            return true;
        }
        /// <summary>
        /// 重写TryConvert方法
        /// Deserialize or foreach(IEnumerable)
        /// </summary>
        /// <param name="binder"></param>
        /// <param name="result"></param>
        /// <returns></returns>
        public override bool TryConvert(ConvertBinder binder, out object result)
        {
            if (binder.Type == typeof(IEnumerable) || binder.Type == typeof(object[]))
            {
                var ie = (IsArray)
                    ? xml.Elements().Select(x => ToValue(x))
                    : xml.Elements().Select(x => (dynamic)new KeyValuePair<string, object>(x.Name.LocalName, ToValue(x)));
                result = (binder.Type == typeof(object[])) ? ie.ToArray() : ie;
            }
            else
            {
                result = Deserialize(binder.Type);
            }
            return true;
        }
        private bool TryGet(XElement element, out object result)
        {
            if (element == null)
            {
                result = null;
                return false;
            }

            result = ToValue(element);
            return true;
        }
        public override bool TryGetIndex(GetIndexBinder binder, object[] indexes, out object result)
        {
            return (IsArray)
                ? TryGet(xml.Elements().ElementAtOrDefault((int)indexes[0]), out result)
                : TryGet(xml.Element((string)indexes[0]), out result);
        }
        public override bool TryGetMember(GetMemberBinder binder, out object result)
        {
            return (IsArray)
                ? TryGet(xml.Elements().ElementAtOrDefault(int.Parse(binder.Name)), out result)
                : TryGet(xml.Element(binder.Name), out result);
        }
        private bool TrySet(string name, object value)
        {
            var type = GetJsonType(value);
            var element = xml.Element(name);
            if (element == null)
            {
                xml.Add(new XElement(name, CreateTypeAttr(type), CreateJsonNode(value)));
            }
            else
            {
                element.Attribute("type").Value = type.ToString();
                element.ReplaceNodes(CreateJsonNode(value));
            }

            return true;
        }
        private bool TrySet(int index, object value)
        {
            var type = GetJsonType(value);
            var e = xml.Elements().ElementAtOrDefault(index);
            if (e == null)
            {
                xml.Add(new XElement("item", CreateTypeAttr(type), CreateJsonNode(value)));
            }
            else
            {
                e.Attribute("type").Value = type.ToString();
                e.ReplaceNodes(CreateJsonNode(value));
            }

            return true;
        }
        public override bool TrySetIndex(SetIndexBinder binder, object[] indexes, object value)
        {
            return (IsArray)
                ? TrySet((int)indexes[0], value)
                : TrySet((string)indexes[0], value);
        }
        public override bool TrySetMember(SetMemberBinder binder, object value)
        {
            return (IsArray)
                ? TrySet(int.Parse(binder.Name), value)
                : TrySet(binder.Name, value);
        }
        public override IEnumerable<string> GetDynamicMemberNames()
        {
            return (IsArray)
                ? xml.Elements().Select((x, i) => i.ToString())
                : xml.Elements().Select(x => x.Name.LocalName);
        }
        /// <summary>
        /// 重写ToString方法
        /// </summary>
        /// <returns></returns>
        public override string ToString()
        {
            //无法序列化就剔除
            foreach (var elem in xml.Descendants().Where(x => x.Attribute("type").Value == "null"))
            {
                elem.RemoveNodes();
            }
            return CreateJsonString(new XStreamingElement("root", CreateTypeAttr(jsonType), xml.Elements()));
        }
        #endregion

    }
}