Product product = new Product();

product.ExpiryDate = new DateTime(2008, 12, 28);

JsonSerializer serializer = new JsonSerializer();

serializer.Converters.Add(new JavaScriptDateTimeConverter());

serializer.NullValueHandling = NullValueHandling.Ignore;

using (StreamWriter sw = new StreamWriter(@"c:\json.txt"))

using (JsonWriter writer = new JsonTextWriter(sw))

{

    serializer.Serialize(writer, product);

    // {"ExpiryDate":new Date(1230375600000),"Price":0}

}

string jsonText = @"{""input"" : ""value"", ""output"" : ""result""}";

JsonReader reader = new JsonTextReader(new StringReader(jsonText));

while (reader.Read())

{

    Console.WriteLine(reader.TokenType + "\t\t" + reader.ValueType + "\t\t" + reader.Value);

}

StringWriter sw = new StringWriter();

JsonWriter writer = new JsonTextWriter(sw);

writer.WriteStartObject();

writer.WritePropertyName("input");

writer.WriteValue("value");

writer.WritePropertyName("output");

writer.WriteValue("result");

writer.WriteEndObject();

writer.Flush();

string jsonText = sw.GetStringBuilder().ToString();

Console.WriteLine(jsonText);

JObject jo = JObject.Parse(jsonText);

string[] values = jo.Properties().Select(item => item.Value.ToString()).ToArray();

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

string jsonText = "[{'a':'aaa','b':'bbb','c':'ccc'},{'a':'aaa2','b':'bbb2','c':'ccc2'}]";

JArray ja =(JArray) JsonConvert.DeserializeObject(jsonText);

JObject o = (JObject)ja[1];

Console.WriteLine(o["a"]);

Console.WriteLine(ja[1]["a"]);

string jsonArrayText1 = "[{'a':'a1','b':'b1'},{'a':'a2','b':'b2'}]";

JArray ja = (JArray)JsonConvert.DeserializeObject(jsonArrayText1);

string ja1a = ja[]["a"].ToString();

//或者

JObject o = (JObject)ja[];

string oa = o["a"].ToString();

string jsonText = "{\"beijing\":{\"zone\":\"海淀\",\"zone_en\":\"haidian\"}}";

JObject jo = (JObject)JsonConvert.DeserializeObject(jsonText);

string zone = jo["beijing"]["zone"].ToString();

string zone_en = jo["beijing"]["zone_en"].ToString();

class Project

{

    public string Input { get; set; }

    public string Output { get; set; }

}

Project p = new Project() { Input = "stone", Output = "gold" };

JsonSerializer serializer = new JsonSerializer();

StringWriter sw = new StringWriter();

serializer.Serialize(new JsonTextWriter(sw), p);

Console.WriteLine(sw.GetStringBuilder().ToString());

StringReader sr = new StringReader(@"{""Input"":""stone"", ""Output"":""gold""}");

Project p1 = (Project)serializer.Deserialize(new JsonTextReader(sr), typeof(Project));

Console.WriteLine(p1.Input + "=>" + p1.Output);

Project p = new Project() { Input = "stone", Output = "gold" };

DataContractJsonSerializer serializer = new DataContractJsonSerializer(p.GetType());

string jsonText;

using (MemoryStream stream = new MemoryStream())

{

    serializer.WriteObject(stream, p);

    jsonText = Encoding.UTF8.GetString(stream.ToArray());

    Console.WriteLine(jsonText);

}

using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonText)))

{

    DataContractJsonSerializer serializer1 = new DataContractJsonSerializer(typeof(Project));

    Project p1 = (Project)serializer1.ReadObject(ms);

    Console.WriteLine(p1.Input + "=>" + p1.Output);

}

[DataContract]

class Project

{

    [DataMember]

    public string Input { get; set; }

    [DataMember]

    public string Output { get; set; }

}