C#解析json数据的方法

C#解析json数据的方法

本文介绍三种方式

使用JavaScriptSerializer解析数据（速度较慢，不建议使用）

使用JsonConvert解析数据（建议使用在，在.net3.5下可以使用）

使用fastJson解析数据（推荐使用，但只支持.net4及以上）

JsonConvert方式

1、引用命名空间：Newtonsoft.Json

2、解析类

[plain] [copy]

[plain]
/// <summary>
/// Json帮助类
/// </summary>
public class JsonHelper
{
/// <summary>
/// 将对象序列化为JSON格式
/// </summary>
/// <param name="o">对象</param>
/// <returns>Json字符串</returns>
public static string SerializeObject(object o)
{
string json = JsonConvert.SerializeObject(o);
return json;
}

/// <summary>
/// 解析JSON字符串生成对象实体
/// </summary>
/// <typeparam name="T">对象类型</typeparam>
/// <param name="json">json字符串(eg.{"ID":"112","Name":"石子儿"})</param>
/// <returns>对象实体</returns>
public static T DeserializeJsonToObject<T>(string json) where T : class
{
JsonSerializer serializer = new JsonSerializer();
StringReader sr = new StringReader(json);
object o = serializer.Deserialize(new JsonTextReader(sr), typeof(T));
T t = o as T;
return t;
}

/// <summary>
/// 解析JSON数组生成对象实体集合
/// </summary>
/// <typeparam name="T">对象类型</typeparam>
/// <param name="json">json数组字符串(eg.[{"ID":"112","Name":"石子儿"}])</param>
/// <returns>对象实体集合</returns>
public static List<T> DeserializeJsonToList<T>(string json) where T : class
{
JsonSerializer serializer = new JsonSerializer();
StringReader sr = new StringReader(json);
object o = serializer.Deserialize(new JsonTextReader(sr), typeof(List<T>));
List<T> list = o as List<T>;
return list;
}

/// <summary>
/// 反序列化JSON到给定的匿名对象.
/// </summary>
/// <typeparam name="T">匿名对象类型</typeparam>
/// <param name="json">json字符串</param>
/// <param name="anonymousTypeObject">匿名对象</param>
/// <returns>匿名对象</returns>
public static T DeserializeAnonymousType<T>(string json, T anonymousTypeObject)
{
T t = JsonConvert.DeserializeAnonymousType(json, anonymousTypeObject);
return t;
}
}

[/code]

fastJson方式

1、引入命名空间 fastJSON

下载地址：http://download.csdn.net/detail/mrli113/9685273

2、解析类

public class JsonHelper
{

/// <summary>
/// 将对象转换成json字符串
/// </summary>
/// <param name="o"></param>
/// <returns></returns>
public static string SerializeObject(object o)
{
return JSON.Instance.ToJSON(o);
}
/// <summary>
/// 将对象转换成模型
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="json"></param>
/// <returns></returns>
public static T JSONStringToT<T>(string json)
{
T t = (T)JSON.Instance.ToObject(json);
return t;
}
/// <summary>
/// 将json字符串换成List<T>
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="JsonStr"></param>
/// <returns></returns>
public static List<T> JSONStringToList<T>(string JsonStr)
{
List<T> objs = JSON.Instance.ToObject<List<T>>(JsonStr);
return objs;
}
/// <summary>
/// JSON文本转对象,指定类型
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="JsonStr"></param>
/// <returns></returns>
public static object JSONStringToList<T>(string JsonStr, System.Type type)
{
object objs = JSON.Instance.ToObject(JsonStr,type);
return objs;
}

}

JavaScriptSerializer方式

1、引入命名空间 System.Web.Script.Serialization

2、解析类

public static class JsonHelper
{
public static JavaScriptSerializer Serializer = new JavaScriptSerializer();
/// <summary>
/// 将对象转换成json字符串
/// </summary>
/// <param name="o"></param>
/// <returns></returns>
public static string SerializeObject(object o)
{
return Serializer.Serialize(o);
}
/// <summary>
/// 将对象转换成特定模型
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="o"></param>
/// <returns></returns>
public static T JSONObjectToT<T>(object o)
{
T t=Serializer.ConvertToType<T>(o);
return t;
}
/// <summary>
/// json字符串转换成模型对象
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="json"></param>
/// <returns></returns>
public static T JSONStringToT<T>(string json)
{
T t= (T)Serializer.DeserializeObject(json);
return t;
}
/// <summary>
/// json字符串转出List对象
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="JsonStr"></param>
/// <returns></returns>
public static List<T> JSONStringToList<T>(string JsonStr)
{
JavaScriptSerializer Serializer = new JavaScriptSerializer();
List<T> objs = Serializer.Deserialize<List<T>>(JsonStr);
return objs;
}

}