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C# JSON字符串序列化与反序列化常见模型举例

2015-07-26 22:47 453 查看
C#中实体转Json常用的类JavaScriptSerializer,该类位于using System.Web.Script.Serialization;命名空间中,添加引用system.web.extensions。常见序列化和反序列化的方法如下:

public static List<T> JSONStringToList<T>(this string JsonStr)
{
JavaScriptSerializer Serializer = new JavaScriptSerializer();
List<T> objs = Serializer.Deserialize<List<T>>(JsonStr);
return objs;
}

public static T Deserialize<T>(string json)
{
T obj = Activator.CreateInstance<T>();
using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(json)))
{
DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType());
return (T)serializer.ReadObject(ms);
}
}


C#中实体转JSON常用的实例情况:

第一种JSON格式:

{"Name":"苹果","Price":5.5}

该类型的json,对应的实体就是一个类,里面两个属性name和price,对应如下:

public class Product
{
public string Name { get; set; }
public double Price { get; set; }
}


第二种JSON格式:

{"GetProducts":[{"Name":"苹果","Price":5.5},{"Name":"橘子","Price":2.5},{"Name":"柿子","Price":16}]}

对应的类封装如下:

public class Product
{
public string Name { get; set; }
public double Price { get; set; }
}

public class ProductList
{
public List<Product> GetProducts { get; set; }
}


封装的时候,只需要封装ProductList实例;

第三种:
{"GetProducts":["5841526","985423","23366368"]}

这种json对应的C#类如下:

public class ProductList
{
public List<string> GetProductsname=new  List<string>(
){"5841526","985423","23366368"};

}


第四种:

{"GetProducts":[{"Name":"5841526"},{"Price",985423}]}

这种json有点难度,但是我们c#也能转化,对应的C#类如下:

public class Product
{
public string Name { get; set; }

}

public class Pnum
{
public double Price { get; set; }
}

public class ProductList
{
public List<object> GetProducts { get; set; }
}

public static string GetJsonString()
{
List<object> products = new List<object>()
{
new Product(){Name="苹果"},
new Pnum(){ Price=3.2}
};
ProductList pl = new ProductList() { GetProducts = products };
return new JavaScriptSerializer().Serialize(pl);
}


这就是我总结的常见四种json对应的序列化方式。JavaScriptSerializer是一款不错的json序列化的工具,用好了就是神器,晚安!
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