JSON.NET 简单的使用

JSON.NET（http://json.codeplex.com/）使用来将.NET中的对象转换为JSON字符串（序列化？），或者将JSON字符串转换为.NET中已有类型的对象（反序列化？）@H_403_4@

首先为了例子随便定义一个类型：@H_403_4@

public class Product
{
    string Name { get; set; }
    public DateTime Expiry { decimal Price { string[] Sizes { set; }

    override string ToString()
    {
        return string.Format("Name:{0},Expiry:{1},Price:{2},SizesCount:{3}",Name,Expiry,Price,Sizes.Length);
    }
}

初始化对象：@H_403_4@

static void Main(string[] passwordargs) { Product product = new Product() { Name = android DateTime.Now,Price = 2000,Sizes = new string[] { 1.5",2.24.1" } }; }

进行到JSON的转换：@H_403_4@

Console.WriteLine(JsonConvert.SerializeObject(product));

输出结果：@H_403_4@

{"Name":"android","Expiry":"2013-08-30T09:50:11.5147845+08:00","Price":2000.0,"Sizes":["1.5","2.2","4.1"]}@H_403_4@

其它看起来一切正常，除了这个日期有点怪@H_403_4@

格式化日期：@H_403_4@

//设置日期时间的格式，与DataTime类型的ToString格式相同
IsoDateTimeConverter iso = new IsoDateTimeConverter();
iso.DateTimeFormat = yyyy-MM-dd HH:mm:ss";

Console.WriteLine(JsonConvert.SerializeObject(product,iso));

输出结果：@H_403_4@

{"Name":"android","Expiry":"2013-08-30 09:53:58","4.1"]}@H_403_4@

从JSON到对象的转换：@H_403_4@

string str = {\"Name\":\"android\",\"Expiry\":\"2013-08-30 09:53:58\",\"Price\":2000.0,\"Sizes\":[\"1.5\",\"2.2\",\"4.1\"]}"; Product p = (Product)JsonConvert.DeserializeObject(str,typeof(Product)); Console.WriteLine(p.ToString());

输出结果：@H_403_4@

Name:android,Expiry:2013/8/30 9:53:58,Price:2000.0,SizesCount:3@H_403_4@

从JSON到键值对的转换：@H_403_4@

string strJson = @"{""Name1"": ""小明"",""Name2"": ""小花"",""Name3"": ""小红""}"; Dictionary<string,255)">string> _dictionary = JsonConvert.DeserializeObject<Dictionary<string>>(strJson); foreach (KeyValuePair<string> kp in _dictionary) { Console.WriteLine(kp.Key + :" + kp.Value); }

输出结果：@H_403_4@

Name1:小明
Name2:小花
Name3:小红@H_403_4@

从字符串转换到JSON对象，以及JSON对象的简单使用：@H_403_4@

string strJson2 = { ""student"": { ""Name1"": ""小明"",""Name3"": ""小红""} }"; JObject jsonObj = JObject.Parse(strJson2); Console.WriteLine(jsonObj[student"][Name1"].ToString()); Console.WriteLine(jsonObj[Name2Name3"].ToString());

输出结果：@H_403_4@

小明
小花
小红@H_403_4@

直接生成JSON对象：@H_403_4@

JObject json =
    new JObject(
    new JProperty(Channelnew JObject(
        titleJSON"),0)">linkJSON.NETdescriptionJSON.NET Descriptionitemsnew JArray(
            new JObject(haha1123")),0)">haha2456haha3789"))
                )))));

Console.WriteLine(json.ToString());

输出结果：@H_403_4@

{
"Channel": {
"title": "JSON",
"link": "JSON.NET",
"description": "JSON.NET Description",
"items": [
{
"haha1": "123"
},
{
"haha2": "456"
},
{
"haha3": "789"
}
]
}
}@H_403_4@

暂时先记录这么多，以后再继续补充@H_403_4@