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不一样的dynamic解析json

写过javascript的人都知道js解析json

1：(JSON) 字符串转换为对象。

var str = '{"name":"lsw"," hobby ":"free"}';

1.1：JSON.parse(str);

2:对象解析出字符串

var a = {a:1,b:2};

JSON.stringify(a)

3:注意：浏览器兼容问题网上有json2.js文件或者jquery文件

问题来了c# 写过webapi 或者webservice wcf 接口的都会遇到 json、xml的问题

code：

c#：

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 LjlWebApi.Common {  public class DynamicJson : DynamicObject  {   private enum JsonType   {    @string, number, boolean, @object, array, @null   }   // public static methods   /// <summary>from JsonSring to DynamicJson</summary>   public static dynamic Parse(string json)   {    return Parse(json, Encoding.Unicode);   }   /// <summary>from JsonSring to DynamicJson</summary>   public static dynamic Parse(string json, Encoding encoding)   {    using (var reader = JsonReaderWriterFactory.CreateJsonReader(encoding.GetBytes(json), XmlDictionaryReaderQuotas.Max))    {     return ToValue(XElement.Load(reader));    }   }   /// <summary>from JsonSringStream to DynamicJson</summary>   public static dynamic Parse(Stream stream)   {    using (var reader = JsonReaderWriterFactory.CreateJsonReader(stream, XmlDictionaryReaderQuotas.Max))    {     return ToValue(XElement.Load(reader));    }   }   /// <summary>from JsonSringStream to DynamicJson</summary>   public static dynamic Parse(Stream stream, Encoding encoding)   {    using (var reader = JsonReaderWriterFactory.CreateJsonReader(stream, encoding, XmlDictionaryReaderQuotas.Max, _ => { }))    {     return ToValue(XElement.Load(reader));    }   }   /// <summary>create JsonSring from primitive or IEnumerable or Object({public property name:property value})</summary>   public static string Serialize(object obj)   {    return CreateJsonString(new XStreamingElement("root", CreateTypeAttr(GetJsonType(obj)), CreateJsonNode(obj)));   }   // private static methods   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 DynamicJson(element, type);     case JsonType.@null:     default:      return null;    }   }   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)   {    using (var ms = new MemoryStream())    using (var writer = JsonReaderWriterFactory.CreateJsonWriter(ms, Encoding.Unicode))    {     element.WriteTo(writer);     writer.Flush();     return Encoding.Unicode.GetString(ms.ToArray());    }   }   // dynamic structure represents JavaScript Object/Array   readonly XElement xml;   readonly JsonType jsonType;   /// <summary>create blank JSObject</summary>   public DynamicJson()   {    xml = new XElement("root", CreateTypeAttr(JsonType.@object));    jsonType = JsonType.@object;   }   private DynamicJson(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>has property or not</summary>   public bool IsDefined(string name)   {    return IsObject && (xml.Element(name) != null);   }   /// <summary>has property or not</summary>   public bool IsDefined(int index)   {    return IsArray && (xml.Elements().ElementAtOrDefault(index) != null);   }   /// <summary>delete property</summary>   public bool Delete(string name)   {    var elem = xml.Element(name);    if (elem != null)    {     elem.Remove();     return true;    }    else return false;   }   /// <summary>delete property</summary>   public bool Delete(int index)   {    var elem = xml.Elements().ElementAtOrDefault(index);    if (elem != null)    {     elem.Remove();     return true;    }    else return false;   }   /// <summary>mapping to Array or Class by Public PropertyName</summary>   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 DynamicJson)    {     value = ((DynamicJson)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) // Foo[]    {     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 // List<Foo>    {     var elemType = targetType.GetGenericArguments()[0];     dynamic list = Activator.CreateInstance(targetType);     foreach (var item in xml.Elements())     {      list.Add(DeserializeValue(item, elemType));     }     return list;    }   }   // Delete   public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)   {    result = (IsArray)     ? Delete((int)args[0])     : Delete((string)args[0]);    return true;   }   // IsDefined, if has args then TryGetMember   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;   }   // Deserialize or foreach(IEnumerable)   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>Serialize to JsonString</summary>   public override string ToString()   {    // <foo type="null"></foo> is can't serialize. replace to <foo type="null" />    foreach (var elem in xml.Descendants().Where(x => x.Attribute("type").Value == "null"))    {     elem.RemoveNodes();    }    return CreateJsonString(new XStreamingElement("root", CreateTypeAttr(jsonType), xml.Elements()));   }  } }

用法：

// InstallGuide  Add Reference DynamicJson.dll or include DynamicJson.cs and Add Reference "System.Runtime.Serialization" // HowToUse using Codeplex.Data; // Read and Access // Parse (from JsonString to DynamicJson) var json = DynamicJson.Parse(@"{""foo"":""json"", ""bar"":100, ""nest"":{ ""foobar"":true } }"); var r1 = json.foo; // "json" - dynamic(string) var r2 = json.bar; // 100 - dynamic(double) var r3 = json.nest.foobar; // true - dynamic(bool) var r4 = json["nest"]["foobar"]; // can access indexer // Operate // Check Defined Peroperty // .name() is shortcut of IsDefined("name") var b1_1 = json.IsDefined("foo"); // true var b2_1 = json.IsDefined("foooo"); // false var b1_2 = json.foo(); // true    var b2_2 = json.foooo(); // false; // Add json.Arr = new string[] { "NOR", "XOR" }; // Add Array json.Obj1 = new { }; // Add Object json.Obj2 = new { foo = "abc", bar = 100 }; // Add and Init // Delete // ("name") is shortcut of Delete("name") json.Delete("foo"); json.Arr.Delete(0); json("bar"); json.Arr(1); // Replace json.Obj1 = 5000; // Create New JsonObject dynamic newjson = new DynamicJson(); newjson.str = "aaa"; newjson.obj = new { foo = "bar" }; // Serialize var reJson = json.ToString(); // {"nest":{"foobar":true},"Arr":["XOR"],"Obj1":5000,"Obj2":{"foo":"abc","bar":100}} // Enumerate // DynamicJson - (IsArray) var arrayJson = DynamicJson.Parse(@"[1,10,200,300]"); foreach (int item in arrayJson) {  Console.WriteLine(item); // 1, 10, 200, 300 } // DynamicJson - (IsObject) var objectJson = DynamicJson.Parse(@"{""foo"":""json"",""bar"":100}"); foreach (KeyValuePair<string, object> item in objectJson) {  Console.WriteLine(item.Key + ":" + item.Value); // foo:json, bar:100 } // Convert/Deserialize public class FooBar {  public string foo { get; set; }  public int bar { get; set; } } // (type) is shortcut of Deserialize<type>() var array1 = arrayJson.Deserialize<int[]>(); var array2 = (int[])arrayJson; int[] array3 = arrayJson; // mapping by public property name var foobar1 = objectJson.Deserialize<FooBar>(); var foobar2 = (FooBar)objectJson; FooBar foobar3 = objectJson; // with linq var objectJsonList = DynamicJson.Parse(@"[{""bar"":50},{""bar"":100}]"); var barSum = ((FooBar[])objectJsonList).Select(fb => fb.bar).Sum(); // 150 var dynamicWithLinq = ((dynamic[])objectJsonList).Select(d => d.bar); // Serialize to JSON from Object // Serialize (from Object to JsonString) var obj = new {  Name = "Foo",  Age = 30,  Address = new  {   Country = "Japan",   City = "Tokyo"  },  Like = new[] { "Microsoft", "Xbox" } }; // {"Name":"Foo","Age":30,"Address":{"Country":"Japan","City":"Tokyo"},"Like":["Microsoft","Xbox"]} var jsonStringFromObj = DynamicJson.Serialize(obj); // [{"foo":"fooooo!","bar":1000},{"foo":"orz","bar":10}] var foobar = new FooBar[] {    new FooBar { foo = "fooooo!", bar = 1000 },    new FooBar { foo = "orz", bar = 10 } }; var jsonFoobar = DynamicJson.Serialize(foobar); // Notice: CornerCase var nestJson = DynamicJson.Parse(@"{""tes"":10,""nest"":{""a"":0}"); nestJson.nest(); // This equals json.IsDefined("nest") nestJson.nest("a"); // This equals json.nest.Delete("a") // if name is C#'s reserved word then put prefix "@" var json = DynamicJson.Parse(@"{""int"":10,""event"":null}"); var r1 = json.@int; // 10.0 var r2 = json.@event; // null // History 2010-05-21 ver 1.2.0.0 Fix - Deserialize(cast) can't convert to dynamic[] Fix - Deserialize(cast) throw exception if has getonly property 2010-05-06 ver 1.1.0.0 Add - foreach support Add - Dynamic Shortcut of IsDefined,Delete,Deserialize Fix - Deserialize Delete - Length 2010-04-30 ver 1.0.0.0 1st Release