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Json.Net学习笔记(七) 序列化集合

作者:  时间: 2011-06-11

Json序列化器为序列化及反序列化集合对象提供了良好的支持.

->Serializing

   为了序列化一个集合---一个泛型的list,array,dictionary,或者自定义集合---简单地调用序列化器,使用您想要进行序列化的集合对象作为参数,Json.Net会序列化集合以及所有它包含的值。

示例:

public class Product
    {
        public string Name { get; set; }
        public decimal Price { get; set; }
        [JsonConverter(typeof(IsoDateTimeConverter))]
        public DateTime ExpiryDate { get; set; }
    }

测试:

            Product p1 = new Product()
            {
                Name = "Product 1",
                Price = 99.95m,
                ExpiryDate = new DateTime(2010, 12, 19, 0, 0, 0, DateTimeKind.Utc)
            };
            Product p2 = new Product
            {
                Name = "Product 2",
                Price = 12.50m,
                ExpiryDate = new DateTime(2011, 1, 1, 0, 0, 0, DateTimeKind.Utc)
            };
            List<Product> products = new List<Product>();
            products.Add(p1);
            products.Add(p2);
            string json = JsonConvert.SerializeObject(products, Formatting.Indented);
            Console.WriteLine(json);

输出结果:

[
  {
    "Name": "Product 1",
    "Price": 99.95,
    "ExpiryDate": "2010-12-19T00:00:00Z"
  },
  {
    "Name": "Product 2",
    "Price": 12.50,
    "ExpiryDate": "2011-01-01T00:00:00Z"
  }
]

->Deserializing

  为了反序列化Json到一个.Net集合中,只要指定一个您想要反序列化的集合类型就可以了,Json.Net支持多种类型的集合.

示例:

    string json2 = @"[
                              {
                                ""Name"": ""Product 1"",
                                ""ExpiryDate"": ""2010-12-19T00:00:00Z"",
                                ""Price"": 99.95,
                                ""Sizes"": null
                              },
                              {
                                ""Name"": ""Product 2"",
                                ""ExpiryDate"": ""2011-01-01T00:00:00Z"",
                                ""Price"": 12.50,
                                ""Sizes"": null
                              }
                            ]";
            List<Product> productList = JsonConvert.DeserializeObject<List<Product>>(json2);
            Console.WriteLine(productList.Count);//2
            Product product1 = productList[0];
            Console.WriteLine(product1.Name);//Product 1

->Deserializing Dictionaries

  使用Json.Net你也可以反序列化一个Json对象到一个.Net的泛型Dictionary中.Json对象的属性名和属性值将会被添加到Dictionary中.

示例:

            string jsonDictionary = @"{""key1"":""value1"",""key2"":""value2""}";
            Dictionary<string, string> dic = JsonConvert.DeserializeObject<Dictionary<string, string>>(jsonDictionary);
            Console.WriteLine(dic.Count);//2
            Console.WriteLine(dic["key1"]);//value1