Dynamic動態(tài)Json解析幫助類，C#動態(tài)解析JSON方法，
不用model直接解析JSON，方便快捷的首選方式，
Dynamic動態(tài)解析JSON代碼量最起碼減少一半
DynJsonHelper 全稱為DynamicJsonHelper
中文簡稱：動態(tài)Json解析幫助類
開始封裝時間：2016.3.30（持續(xù)更新中）
適用版本：.NET Framework 4.0以上版本（包含.NET4.0）
核心技術(shù)：運(yùn)用Dynamic特性將json字符串自動轉(zhuǎn)換為Dynamic Object實(shí)現(xiàn)動態(tài)解析json數(shù)組
核心理念：采用動態(tài)解析json數(shù)據(jù)的方式，去除.Net中對Model實(shí)體對象封裝，
達(dá)到節(jié)約時間成本、精簡代碼、提高開發(fā)效率的目的
調(diào)用方法：暫時封裝了兩個實(shí)用方法
Json字符串轉(zhuǎn)為Json對象 ： DynJsonHelper.ToObject(Json字符串);
數(shù)組/對象轉(zhuǎn)為Json字符串：DynJsonHelper.ToJson(數(shù)組/對象);
DynJsonHelper源碼下載
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 全稱為DynamicJsonHelper
* 中文簡稱：動態(tài)Json解析幫助類
* 開始封裝時間：2016.3.30（持續(xù)更新中）
* 適用版本：.NET Framework 4.0以上版本（包含.NET4.0）
* 核心技術(shù)：運(yùn)用Dynamic特性將json字符串自動轉(zhuǎn)換為Dynamic Object實(shí)現(xiàn)動態(tài)解析json數(shù)組
* 核心理念：采用動態(tài)解析json數(shù)據(jù)的方式，去除.Net中對Model實(shí)體對象封裝，
* 達(dá)到節(jié)約時間成本、精簡代碼、提高開發(fā)效率的目的
* 調(diào)用方法：暫時封裝了兩個實(shí)用方法
* Json字符串轉(zhuǎn)為Json對象 ： DynJsonHelper.ToObject(Json字符串);
* 數(shù)組/對象轉(zhuǎn)為Json字符串：DynJsonHelper.ToJson(數(shù)組/對象);
*
*
* **/
public class DynJsonHelper : DynamicObject
{
#region Json操作方法
/// <summary>
/// 把Json字符串轉(zhuǎn)為Json對象
/// </summary>
/// <param name="json">String類型 符合Json規(guī)范的字符串</param>
/// <returns>Json對象或Json數(shù)組List</returns>
public static dynamic ToObject(string json)
{
return ToObject(json, Encoding.Unicode);
}
/// <summary>
/// 把Json字符串轉(zhuǎn)為Json對象（可自定義編碼）
/// </summary>
/// <param name="json">String類型 符合Json規(guī)范的字符串</param>
/// <param name="encoding">自定義編碼</param>
/// <returns>Json對象或Json數(shù)組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類型的Json數(shù)據(jù)轉(zhuǎn)為Json對象
/// </summary>
/// <param name="stream">Stream類型Json數(shù)據(jù)</param>
/// <returns>Json對象或Json數(shù)組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類型的Json數(shù)據(jù)轉(zhuǎn)為Json對象
/// </summary>
/// <param name="stream">Stream類型Json數(shù)據(jù)</param>
/// <param name="encoding">自定義編碼</param>
/// <returns>Json對象或Json數(shù)組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>
/// 把對象或者List數(shù)組轉(zhuǎn)為Json字符串（支持復(fù)雜對象轉(zhuǎn)換）
/// </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>
/// 枚舉定義Json類型
/// </summary>
private enum JsonType
{
@string, number, boolean, @object, array, @null
}
/// <summary>
/// 處理不同類型的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>
/// 獲取Json字段類型
/// </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; }
}
//動態(tài)處理對象和數(shù)組List
readonly XElement xml;
readonly JsonType jsonType;
/// <summary>
/// 創(chuàng)建無參構(gòu)造函數(shù)
/// </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>
/// 類型屬性驗(yàn)證
/// </summary>
/// <param name="name"></param>
/// <returns></returns>
public bool IsDefined(string name)
{
return IsObject && (xml.Element(name) != null);
}
/// <summary>
/// 類型屬性驗(yàn)證
/// </summary>
/// <param name="index"></param>
/// <returns></returns>
public bool IsDefined(int index)
{
return IsArray && (xml.Elements().ElementAtOrDefault(index) != null);
}
/// <summary>
/// 刪除屬性
/// </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>
/// 刪除屬性
/// </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>
/// 映射到數(shù)組或類的公共屬性名
/// </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[]==>數(shù)組[]
{
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>
/// 刪除
/// </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>
/// 重寫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>
/// 重寫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>
/// 重寫ToString方法
/// </summary>
/// <returns></returns>
public override string ToString()
{
//無法序列化就剔除
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
}
}