json字符串解析成Dynamic对象，开源地址http://dynamicjson.codeplex.com/，访问比较慢。使用方法摘录如下：
Project Description
dynamic json structure for C# 4.0.
Features
- Intuitive operation by "dynamic".
- This library is only 1 class and written in 400 lines.
- Available in NuGet Install-Package DynamicJson
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
var json = DynamicJson.Parse(@"{""foo"":""json"", ""bar"":100, ""nest"":{ ""foobar"":true } }");
// 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(to JSON String)
var jsonstring = newjson.ToString(); // {"str":"aaa","obj":{"foo":"bar"}}
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, dynamic> 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; }
}
var arrayJson = DynamicJson.Parse(@"[1,10,200,300]");
var objectJson = DynamicJson.Parse(@"{""foo"":""json"",""bar"":100}");
// (type) is shortcut of Deserialize<type>()
var array1 = arrayJson.Deserialize<int[]>();
var array2 = (int[])arrayJson; // equals array1
int[] array3 = arrayJson; // equals array2
// 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 String 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: corner case
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
Example : TwitterAPI
static void Main()
{
var publicTL = new WebClient().DownloadString(@"http://twitter.com/statuses/public_timeline.json");
var statuses = DynamicJson.Parse(publicTL);
foreach (var status in statuses)
{
Console.WriteLine(status.user.screen_name);
Console.WriteLine(status.text);
}
}
Example : TwitterAPI2
static void Main(string[] args)
{
// fetch and flatten user_timeline
var wc = new WebClient();
var statuses = Enumerable.Range(1, 5)
.Select(i =>
wc.DownloadString("http://twitter.com/statuses/user_timeline/neuecc.json?page=" + i))
.SelectMany(s => (dynamic[])DynamicJson.Parse(s))
.OrderBy(j => j.id);
foreach (var status in statuses)
{
Console.WriteLine(status.text);
}
}
实际应用 :微信Web版通讯录解析
调用微信接口返回的通讯录数据格式
{ "BaseResponse": { "Ret": 0, "ErrMsg": "" } , "MemberCount": 246, "MemberList": [{ "Uin": 0, "UserName": "@48150c1c772dea6fc78adc0704bb45ae", "NickName": "木春", "HeadImgUrl": "/cgi-bin/mmwebwx-bin/webwxgeticon?seq=500719&username=@48150c1c772dea6fc78adc0704bb45ae&skey=", "ContactFlag": 3, "MemberCount": 0, "MemberList": [], "RemarkName": "", "HideInputBarFlag": 0, "Sex": 0, "Signature": "", "VerifyFlag": 0, "OwnerUin": 0, "PYInitial": "MC", "PYQuanPin": "muchun", "RemarkPYInitial": "", "RemarkPYQuanPin": "", "StarFriend": 0, "AppAccountFlag": 0, "Statues": 0, "AttrStatus": 98489, "Province": "北京", "City": "", "Alias": "", "SnsFlag": 0, "UniFriend": 0, "DisplayName": "", "ChatRoomId": 0, "KeyWord": "Col", "EncryChatRoomId": "" } ,{ "Uin": 0, "UserName": "@fd853d9befbee535976cfbad99b84c20", "NickName": "敷衍", "HeadImgUrl": "/cgi-bin/mmwebwx-bin/webwxgeticon?seq=1343690&username=@fd853d9befbee535976cfbad99b84c20&skey=", "ContactFlag": 1, "MemberCount": 0, "MemberList": [], "RemarkName": "", "HideInputBarFlag": 0, "Sex": 2, "Signature": "", "VerifyFlag": 0, "OwnerUin": 0, "PYInitial": "FY", "PYQuanPin": "fuyan", "RemarkPYInitial": "", "RemarkPYQuanPin": "", "StarFriend": 0, "AppAccountFlag": 0, "Statues": 0, "AttrStatus": 4147, "Province": "北京", "City": "海淀", "Alias": "", "SnsFlag": 17, "UniFriend": 0, "DisplayName": "", "ChatRoomId": 0, "KeyWord": "G23", "EncryChatRoomId": "" } ] }
解析成对象列表
public static List<ContactModel> GetContactList(string response) { var ret = new List<ContactModel>(); var contactJson = DynamicJson.Parse(response); foreach (var member in contactJson.MemberList) { var model = new ContactModel() { UserName = member.UserName, NickName = member.NickName, HeadImgUrl = member.HeadImgUrl, RemarkName = member.RemarkName, Sex = member.Sex, Signature = member.Signature, VerifyFlag = member.VerifyFlag, Province = member.Province, City = member.City, }; ret.Add(model); } return ret; }
属性直接访问就行，注意大小写。最后奉上DynamicJson.cs的完整代码
/*-------------------------------------------------------------------------- * DynamicJson * ver 1.2.0.0 (May. 21th, 2010) * * created and maintained by neuecc <ils@neue.cc> * licensed under Microsoft Public License(Ms-PL) * http://neue.cc/ * http://dynamicjson.codeplex.com/ * 博客园网友 夜の魔王 友情借用此代码，用于微信开发。 * http://www.cnblogs.com/deepleo/ *--------------------------------------------------------------------------*/ 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 WeiXin.Manager.Helper { 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())); } } }