public void JsonDemo()
{
string strJson = "{\"count\":\"5550\",\"status\": \"200\",\"message\": \"success\",\"show_data\":[{\"productsId\":\"10025\"},{\"productsId\":\"10026\"}]}";
dynamic strItem = ConvertJson(strJson);
string count = strItem.count.ToString();

foreach (dynamic item in strItem.show_data)
{

HttpContext.Current.Response.Write(item.productsId);
}

}
/// <summary>
/// Json转化为动态变量
/// </summary>
/// <param name="json">json字符段</param>
/// <param name="isConvertChild">是否转子节点</param>
/// <returns></returns>
public static dynamic ConvertJson(string json, bool isConvertChild = true)
{
if ((json + "").Length == 0) return new DynamicJsonObject();

var jss = new JavaScriptSerializer { MaxJsonLength = int.MaxValue };
jss.RegisterConverters(isConvertChild
? new JavaScriptConverter[] { new DynamicJsonConverter() }
: new JavaScriptConverter[] { new DynamicJsonConverter2() });
var dy = jss.Deserialize(json, typeof(object)) as dynamic;
return dy;
}
#region DynamicJsonConverter
//item.productsId
public 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 Type[] { typeof(object) })); }
}
}
public class DynamicJsonObject : DynamicObject
{
private IDictionary<string, object> Dictionary { get; set; }
public DynamicJsonObject()
{
this.Dictionary = new Dictionary<string, object>();
}
public DynamicJsonObject(IDictionary<string, object> dictionary)
{
this.Dictionary = dictionary;
}
/// <summary>
/// 移除节点
/// </summary>
/// <param name="name"></param>
public void RemoveElement(string name)
{
if (Dictionary.ContainsKey(name))
Dictionary.Remove(name);
}

public IDictionary<string, object> GetDictionary()
{
return Dictionary;
}

public string ToJsonString()
{
return GetJson(Dictionary);
}

public override bool TrySetMember(SetMemberBinder binder, object value)
{
if (this.Dictionary.ContainsKey(binder.Name))
{
this.Dictionary[binder.Name] = value;
}
else
{
this.Dictionary.Add(binder.Name, value);
}
return true;
}

public override bool TryGetMember(GetMemberBinder binder, out object result)
{

if (this.Dictionary == null || !this.Dictionary.TryGetValue(binder.Name, out result))
{
var dictionary = this.Dictionary;
if (dictionary != null) dictionary.Add(binder.Name, "");
result = "";
return true;
}

if (result is IDictionary<string, object>)
{
result = new DynamicJsonObject(result as IDictionary<string, object>);
}
else if (result is ArrayList && (result as ArrayList) is IDictionary<string, object>)
{
result =
new List<DynamicJsonObject>(
(result as ArrayList).ToArray()
.Select(x => new DynamicJsonObject(x as IDictionary<string, object>)));
}
else if (result is ArrayList)
{
result = new List<DynamicJsonObject>(
(result as ArrayList).ToArray()
.Select(x => new DynamicJsonObject(x as IDictionary<string, object>)));
}
else if (result is int)
{
result = result.ToString();
}

return this.Dictionary.ContainsKey(binder.Name);
}
}
#endregion

#region DynamicJsonConverter2
//item["productsId"]
public class DynamicJsonConverter2 : 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 DynamicJsonObject2(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 Type[] { typeof(object) })); }
}
}
public class DynamicJsonObject2 : DynamicObject
{
private IDictionary<string, object> Dictionary { get; set; }
public DynamicJsonObject2()
{
this.Dictionary = new Dictionary<string, object>();
}
public DynamicJsonObject2(IDictionary<string, object> dictionary)
{
this.Dictionary = dictionary;
}
/// <summary>
/// 移除节点
/// </summary>
/// <param name="name"></param>
public void RemoveElement(string name)
{
if (Dictionary.ContainsKey(name))
Dictionary.Remove(name);
}

public IDictionary<string, object> GetDictionary()
{
return Dictionary;
}

public string ToJsonString()
{
return GetJson(Dictionary);
}

public override bool TrySetMember(SetMemberBinder binder, object value)
{
if (this.Dictionary.ContainsKey(binder.Name))
{
this.Dictionary[binder.Name] = value;
}
else
{
this.Dictionary.Add(binder.Name, value);
}
return true;
}

public override bool TryGetMember(GetMemberBinder binder, out object result)
{

if (this.Dictionary == null || !this.Dictionary.TryGetValue(binder.Name, out result))
{
var dictionary = this.Dictionary;
if (dictionary != null) dictionary.Add(binder.Name, "");
result = "";
return true;
}

if (result is IDictionary<string, object>)
{
result = result as IDictionary<string, object>;
}
else if (result is ArrayList && (result as ArrayList) is IDictionary<string, object>)
{
result =
new List<IDictionary<string, object>>(
(result as ArrayList).ToArray()
.Select(x => x as IDictionary<string, object>));
}
else if (result is ArrayList)
{
result =
new List<IDictionary<string, object>>(
(result as ArrayList).ToArray()
.Select(x => x as IDictionary<string, object>));
}
else if (result is int)
{
result = result.ToString();
}

return this.Dictionary.ContainsKey(binder.Name);
}
}
#endregion
public static string GetJson(object obj)
{
string str;
try
{
var js = new JavaScriptSerializer { MaxJsonLength = int.MaxValue };
str = js.Serialize(obj);
}
catch
{
str = "";
}
return str;
}