将JSON反序列化为C＃动态对象？

如果您愿意依赖该

System.Web.Helpers

Json

dynamic data = Json.Depre(json);

它包含在MVC框架中，作为对.NET
4框架的额外下载。如果有帮助，请务必给弗拉德投票！但是，如果您不能假定客户端环境包括此DLL，请继续阅读。

这里提出了另一种反序列化方法。我稍稍修改了代码以修复错误并适合我的编码风格。您需要的只是此代码和

System.Web.Extensions

using System;using System.Collections;using System.Collections.Generic;using System.Collections.ObjectModel;using System.Dynamic;using System.Linq;using System.Text;using System.Web.script.Serialization;public sealed class DynamicJsonConverter : JavascriptConverter{    public override object Deserialize(IDictionary<string, object> dictionary, Type type, JavascriptSerializer serializer)    {        if (dictionary == null) throw new ArgumentNullException("dictionary");        return type == typeof(object) ? new DynamicJsonObject(dictionary) : null;    }    public override IDictionary<string, object> Serialize(object obj, JavascriptSerializer serializer)    {        throw new NotImplementedException();    }    public override IEnumerable<Type> SupportedTypes    {        get { return new ReadOnlyCollection<Type>(new List<Type>(new[] { typeof(object) })); }    }    #region Nested type: DynamicJsonObject    private sealed class DynamicJsonObject : DynamicObject    {        private readonly IDictionary<string, object> _dictionary;        public DynamicJsonObject(IDictionary<string, object> dictionary)        { if (dictionary == null)     throw new ArgumentNullException("dictionary"); _dictionary = dictionary;        }        public override string ToString()        { var sb = new StringBuilder("{"); ToString(sb); return sb.ToString();        }        private void ToString(StringBuilder sb)        { var firstInDictionary = true; foreach (var pair in _dictionary) {     if (!firstInDictionary)         sb.Append(",");     firstInDictionary = false;     var value = pair.Value;     var name = pair.Key;     if (value is string)     {         sb.AppendFormat("{0}:"{1}"", name, value);     }     else if (value is IDictionary<string, object>)     {         new DynamicJsonObject((IDictionary<string, object>)value).ToString(sb);     }     else if (value is ArrayList)     {         sb.Append(name + ":[");         var firstInArray = true;         foreach (var arrayValue in (ArrayList)value)         {  if (!firstInArray)      sb.Append(",");  firstInArray = false;  if (arrayValue is IDictionary<string, object>)      new DynamicJsonObject((IDictionary<string, object>)arrayValue).ToString(sb);  else if (arrayValue is string)      sb.AppendFormat(""{0}"", arrayValue);  else      sb.AppendFormat("{0}", arrayValue);         }         sb.Append("]");     }     else     {         sb.AppendFormat("{0}:{1}", name, value);     } } sb.Append("}");        }        public override bool TryGetMember(GetMemberBinder binder, out object result)        { if (!_dictionary.TryGetValue(binder.Name, out result)) {     // return null to avoid exception.  caller can check for null this way...     result = null;     return true; } result = WrapResultObject(result); return true;        }        public override bool TryGetIndex(GetIndexBinder binder, object[] indexes, out object result)        { if (indexes.Length == 1 && indexes[0] != null) {     if (!_dictionary.TryGetValue(indexes[0].ToString(), out result))     {         // return null to avoid exception.  caller can check for null this way...         result = null;         return true;     }     result = WrapResultObject(result);     return true; } return base.TryGetIndex(binder, indexes, out result);        }        private static object WrapResultObject(object result)        { var dictionary = result as IDictionary<string, object>; if (dictionary != null)     return new DynamicJsonObject(dictionary); var arrayList = result as ArrayList; if (arrayList != null && arrayList.Count > 0) {     return arrayList[0] is IDictionary<string, object>          ? new List<object>(arrayList.Cast<IDictionary<string, object>>().Select(x => new DynamicJsonObject(x)))          : new List<object>(arrayList.Cast<object>()); } return result;        }    }    #endregion}

您可以像这样使用它：

string json = ...;var serializer = new JavascriptSerializer();serializer.RegisterConverters(new[] { new DynamicJsonConverter() });dynamic obj = serializer.Deserialize(json, typeof(object));

因此，给定一个JSON字符串：

{  "Items":[    { "Name":"Apple", "Price":12.3 },    { "Name":"Grape", "Price":3.21 }  ],  "Date":"21/11/2010"}

以下代码将在运行时运行：

dynamic data = serializer.Deserialize(json, typeof(object));data.Date; // "21/11/2010"data.Items.Count; // 2data.Items[0].Name; // "Apple"data.Items[0].Price; // 12.3 (as a decimal)data.Items[1].Name; // "Grape"data.Items[1].Price; // 3.21 (as a decimal)