这次给大家带来使用Json.net的方法，使用Json.net的方法的注意事项有哪些，下面就是实战案例，一起来看一下。
Json.net 常用使用小结(推荐)
using System;
using System.Linq;
using System.Collections.Generic;
namespace microstore
{
public interface IPerson
{
string FirstName
{
get;
set;
}
string LastName
{
get;
set;
}
DateTime BirthDate
{
get;
set;
}
}
public class Employee : IPerson
{
public string FirstName
{
get;
set;
}
public string LastName
{
get;
set;
}
public DateTime BirthDate
{
get;
set;
}
public string Department
{
get;
set;
}
public string JobTitle
{
get;
set;
}
}
public class PersonConverter : Newtonsoft.Json.Converters.CustomCreationConverter
{
//重写abstract class CustomCreationConverter的Create方法
public override IPerson Create(Type objectType)
{
return new Employee();
}
}
public partial class testjson : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
//if (!IsPostBack)
// TestJson();
}
#region 序列化
public string TestJsonSerialize()
{
Product product = new Product();
product.Name = "Apple";
product.Expiry = DateTime.Now.AddDays(3).ToString("yyyy-MM-dd hh:mm:ss");
product.Price = 3.99M;
//product.Sizes = new string[] { "Small", "Medium", "Large" };
//string json = Newtonsoft.Json.JsonConvert.SerializeObject(product); //没有缩进输出
string json = Newtonsoft.Json.JsonConvert.SerializeObject(product, Newtonsoft.Json.Formatting.Indented);
//string json = Newtonsoft.Json.JsonConvert.SerializeObject(
// product,
// Newtonsoft.Json.Formatting.Indented,
// new Newtonsoft.Json.JsonSerializerSettings { NullValueHandling = Newtonsoft.Json.NullValueHandling.Ignore }
//);
return string.Format("{0}
", json);
}
public string TestListJsonSerialize()
{
Product product = new Product();
product.Name = "Apple";
product.Expiry = DateTime.Now.AddDays(3).ToString("yyyy-MM-dd hh:mm:ss");
product.Price = 3.99M;
product.Sizes = new string[] { "Small", "Medium", "Large" };
List plist = new List();
plist.Add(product);
plist.Add(product);
string json = Newtonsoft.Json.JsonConvert.SerializeObject(plist, Newtonsoft.Json.Formatting.Indented);
return string.Format("{0}
", json);
}
#endregion
#region 反序列化
public string TestJsonDeserialize()
{
string strjson = "{\"Name\":\"Apple\",\"Expiry\":\"2014-05-03 10:20:59\",\"Price\":3.99,\"Sizes\":[\"Small\",\"Medium\",\"Large\"]}";
Product p = Newtonsoft.Json.JsonConvert.DeserializeObject(strjson);
string template = @"
- {0}
- {1}
- {2}
- {3}
";
return string.Format(template, p.Name, p.Expiry, p.Price.ToString(), string.Join(",", p.Sizes));
}
public string TestListJsonDeserialize()
{
string strjson = "{\"Name\":\"Apple\",\"Expiry\":\"2014-05-03 10:20:59\",\"Price\":3.99,\"Sizes\":[\"Small\",\"Medium\",\"Large\"]}";
List plist = Newtonsoft.Json.JsonConvert.DeserializeObject>(string.Format("[{0},{1}]", strjson, strjson));
string template = @"
- {0}
- {1}
- {2}
- {3}
";
System.Text.StringBuilder strb = new System.Text.StringBuilder();
plist.ForEach(x =>
strb.AppendLine(
string.Format(template, x.Name, x.Expiry, x.Price.ToString(), string.Join(",", x.Sizes))
)
);
return strb.ToString();
}
#endregion
#region 自定义反序列化
public string TestListCustomDeserialize()
{
string strJson = "[ { \"FirstName\": \"Maurice\", \"LastName\": \"Moss\", \"BirthDate\": \"1981-03-08T00:00Z\", \"Department\": \"IT\", \"JobTitle\": \"Support\" }, { \"FirstName\": \"Jen\", \"LastName\": \"Barber\", \"BirthDate\": \"1985-12-10T00:00Z\", \"Department\": \"IT\", \"JobTitle\": \"Manager\" } ] ";
List people = Newtonsoft.Json.JsonConvert.DeserializeObject>(strJson, new PersonConverter());
IPerson person = people[0];
string template = @"
- 当前List
[x]对象类型：{0}
- FirstName：{1}
- LastName：{2}
- BirthDate：{3}
- Department：{4}
- JobTitle：{5}
";
System.Text.StringBuilder strb = new System.Text.StringBuilder();
people.ForEach(x =>
strb.AppendLine(
string.Format(
template,
person.GetType().ToString(),
x.FirstName,
x.LastName,
x.BirthDate.ToString(),
((Employee)x).Department,
((Employee)x).JobTitle
)
)
);
return strb.ToString();
}
#endregion
#region 反序列化成Dictionary
public string TestDeserialize2Dic()
{
//string json = @"{""key1"":""zhangsan"",""key2"":""lisi""}";
//string json = "{\"key1\":\"zhangsan\",\"key2\":\"lisi\"}";
string json = "{key1:\"zhangsan\",key2:\"lisi\"}";
Dictionary dic = Newtonsoft.Json.JsonConvert.DeserializeObject>(json);
string template = @"key：{0}，value：{1} ";
System.Text.StringBuilder strb = new System.Text.StringBuilder();
strb.Append("Dictionary长度" + dic.Count.ToString() + "");
dic.AsQueryable().ToList().ForEach(x =>
{
strb.AppendLine(string.Format(template, x.Key, x.Value));
});
strb.Append("
");
return strb.ToString();
}
#endregion
#region NullValueHandling特性
public class Movie
{
public string Name { get; set; }
public string Description { get; set; }
public string Classification { get; set; }
public string Studio { get; set; }
public DateTime? ReleaseDate { get; set; }
public List ReleaseCountries { get; set; }
}
///
/// 完整序列化输出
///
public string CommonSerialize()
{
Movie movie = new Movie();
movie.Name = "Bad Boys III";
movie.Description = "It's no Bad Boys";
string included = Newtonsoft.Json.JsonConvert.SerializeObject(
movie,
Newtonsoft.Json.Formatting.Indented, //缩进
new Newtonsoft.Json.JsonSerializerSettings { }
);
return included;
}
///
/// 忽略空（Null）对象输出
///
/// { "aaaa", "bbbb", "cccc" },
LastModified = DateTime.Now.AddDays(5)
};
return Newtonsoft.Json.JsonConvert.SerializeObject(car, Newtonsoft.Json.Formatting.Indented);
}
public string OutIncluded2()
{
Computer com = new Computer
{
Name = "zhangsan",
SalePrice = 3999m,
Manufacture = "red",
StockCount = 5,
WholeSalePrice = 34m,
NextShipmentDate = DateTime.Now.AddDays(5)
};
return Newtonsoft.Json.JsonConvert.SerializeObject(com, Newtonsoft.Json.Formatting.Indented);
}
public class Car
{
// included in JSON
public string Model { get; set; }
public DateTime Year { get; set; }
public List Features { get; set; }
// ignored
[Newtonsoft.Json.JsonIgnore]
public DateTime LastModified { get; set; }
}
//在nt3.5中需要添加System.Runtime.Serialization.dll引用
[System.Runtime.Serialization.DataContract]
public class Computer
{
// included in JSON
[System.Runtime.Serialization.DataMember]
public string Name { get; set; }
[System.Runtime.Serialization.DataMember]
public decimal SalePrice { get; set; }
// ignored
public string Manufacture { get; set; }
public int StockCount { get; set; }
public decimal WholeSalePrice { get; set; }
public DateTime NextShipmentDate { get; set; }
}
#endregion
#region IContractResolver特性
public class Book
{
public string BookName { get; set; }
public decimal BookPrice { get; set; }
public string AuthorName { get; set; }
public int AuthorAge { get; set; }
public string AuthorCountry { get; set; }
}
public void KK()
{
Book book = new Book
{
BookName = "The Gathering Storm",
BookPrice = 16.19m,
AuthorName = "Brandon Sanderson",
AuthorAge = 34,
AuthorCountry = "United States of America"
};
string startingWithA = Newtonsoft.Json.JsonConvert.SerializeObject(
book, Newtonsoft.Json.Formatting.Indented,
new Newtonsoft.Json.JsonSerializerSettings { ContractResolver = new DynamicContractResolver('A') }
);
// {
// "AuthorName": "Brandon Sanderson",
// "AuthorAge": 34,
// "AuthorCountry": "United States of America"
// }
string startingWithB = Newtonsoft.Json.JsonConvert.SerializeObject(
book,
Newtonsoft.Json.Formatting.Indented,
new Newtonsoft.Json.JsonSerializerSettings { ContractResolver = new DynamicContractResolver('B') }
);
// {
// "BookName": "The Gathering Storm",
// "BookPrice": 16.19
// }
}
public class DynamicContractResolver : Newtonsoft.Json.Serialization.DefaultContractResolver
{
private readonly char _startingWithChar;
public DynamicContractResolver(char startingWithChar)
{
_startingWithChar = startingWithChar;
}
protected override IList CreateProperties(Type type, Newtonsoft.Json.MemberSerialization memberSerialization)
{
IList properties = base.CreateProperties(type, memberSerialization);
// only serializer properties that start with the specified character
properties =
properties.Where(p => p.PropertyName.StartsWith(_startingWithChar.ToString())).ToList();
return properties;
}
}
#endregion
//...
}
}
#region Serializing Partial JSON Fragment Example
public class SearchResult
{
public string Title { get; set; }
public string Content { get; set; }
public string Url { get; set; }
}
public string SerializingJsonFragment()
{
#region
string googleSearchText = @"{
'responseData': {
'results': [{
'GsearchResultClass': 'GwebSearch',
'unescapedUrl': 'http://en.wikipedia.org/wiki/Paris_Hilton',
'url': 'http://en.wikipedia.org/wiki/Paris_Hilton',
'visibleUrl': 'en.wikipedia.org',
'cacheUrl': 'http://www.google.com/search?q=cache:TwrPfhd22hYJ:en.wikipedia.org',
'title': 'Paris Hilton - Wikipedia, the free encyclopedia',
'titleNoFormatting': 'Paris Hilton - Wikipedia, the free encyclopedia',
'content': '[1] In 2006, she released her debut album...'
},
{
'GsearchResultClass': 'GwebSearch',
'unescapedUrl': 'http://www.imdb.com/name/nm0385296/',
'url': 'http://www.imdb.com/name/nm0385296/',
'visibleUrl': 'www.imdb.com',
'cacheUrl': 'http://www.google.com/search?q=cache:1i34KkqnsooJ:www.imdb.com',
'title': 'Paris Hilton',
'titleNoFormatting': 'Paris Hilton',
'content': 'Self: Zoolander. Socialite Paris Hilton...'
}],
'cursor': {
'pages': [{
'start': '0',
'label': 1
},
{
'start': '4',
'label': 2
},
{
'start': '8',
'label': 3
},
{
'start': '12',
'label': 4
}],
'estimatedResultCount': '59600000',
'currentPageIndex': 0,
'moreResultsUrl': 'http://www.google.com/search?oe=utf8&ie=utf8...'
}
},
'responseDetails': null,
'responseStatus': 200
}";
#endregion
Newtonsoft.Json.Linq.JObject googleSearch = Newtonsoft.Json.Linq.JObject.Parse(googleSearchText);
// get JSON result objects into a list
List listJToken = googleSearch["responseData"]["results"].Children().ToList();
System.Text.StringBuilder strb = new System.Text.StringBuilder();
string template = @"
- Title:{0}
- Content: {1}
- Url:{2}
";
listJToken.ForEach(x =>
{
// serialize JSON results into .NET objects
SearchResult searchResult = Newtonsoft.Json.JsonConvert.DeserializeObject(x.ToString());
strb.AppendLine(string.Format(template, searchResult.Title, searchResult.Content, searchResult.Url));
});
return strb.ToString();
}
#endregion
#region ShouldSerialize
public class CC
{
public string Name { get; set; }
public CC Manager { get; set; }
//http://msdn.microsoft.com/en-us/library/53b8022e.aspx
public bool ShouldSerializeManager()
{
// don't serialize the Manager property if an employee is their own manager
return (Manager != this);
}
}
public string ShouldSerializeTest()
{
//create Employee mike
CC mike = new CC();
mike.Name = "Mike Manager";
//create Employee joe
CC joe = new CC();
joe.Name = "Joe Employee";
joe.Manager = mike; //set joe'Manager = mike
// mike is his own manager
// ShouldSerialize will skip this property
mike.Manager = mike;
return Newtonsoft.Json.JsonConvert.SerializeObject(new[] { joe, mike }, Newtonsoft.Json.Formatting.Indented);
}
#endregion
//驼峰结构输出（小写打头，后面单词大写）
public string JJJ()
{
Product product = new Product
{
Name = "Widget",
Expiry = DateTime.Now.ToString(),
Price = 9.99m,
Sizes = new[] { "Small", "Medium", "Large" }
};
string json = Newtonsoft.Json.JsonConvert.SerializeObject(
product,
Newtonsoft.Json.Formatting.Indented,
new Newtonsoft.Json.JsonSerializerSettings { ContractResolver = new Newtonsoft.Json.Serialization.CamelCasePropertyNamesContractResolver() }
);
return json;
//{
// "name": "Widget",
// "expiryDate": "2010-12-20T18:01Z",
// "price": 9.99,
// "sizes": [
// "Small",
// "Medium",
// "Large"
// ]
//}
}
#region ITraceWriter
public class Staff
{
public string Name { get; set; }
public List Roles { get; set; }
public DateTime StartDate { get; set; }
}
public void KKKK()
{
Staff staff = new Staff();
staff.Name = "Arnie Admin";
staff.Roles = new List { "Administrator" };
staff.StartDate = new DateTime(2000, 12, 12, 12, 12, 12, DateTimeKind.Utc);
Newtonsoft.Json.Serialization.ITraceWriter traceWriter = new Newtonsoft.Json.Serialization.MemoryTraceWriter();
Newtonsoft.Json.JsonConvert.SerializeObject(
staff,
new Newtonsoft.Json.JsonSerializerSettings
{
TraceWriter = traceWriter,
Converters = { new Newtonsoft.Json.Converters.JavaScriptDateTimeConverter() }
}
);
Console.WriteLine(traceWriter);
// 2012-11-11T12:08:42.761 Info Started serializing Newtonsoft.Json.Tests.Serialization.Staff. Path ''.
// 2012-11-11T12:08:42.785 Info Started serializing System.DateTime with converter Newtonsoft.Json.Converters.JavaScriptDateTimeConverter. Path 'StartDate'.
// 2012-11-11T12:08:42.791 Info Finished serializing System.DateTime with converter Newtonsoft.Json.Converters.JavaScriptDateTimeConverter. Path 'StartDate'.
// 2012-11-11T12:08:42.797 Info Started serializing System.Collections.Generic.List`1[System.String]. Path 'Roles'.
// 2012-11-11T12:08:42.798 Info Finished serializing System.Collections.Generic.List`1[System.String]. Path 'Roles'.
// 2012-11-11T12:08:42.799 Info Finished serializing Newtonsoft.Json.Tests.Serialization.Staff. Path ''.
// 2013-05-18T21:38:11.255 Verbose Serialized JSON:
// {
// "Name": "Arnie Admin",
// "StartDate": new Date(
// 976623132000
// ),
// "Roles": [
// "Administrator"
// ]
// }
}
#endregion
public string TestReadJsonFromFile()
{
Linq2Json l2j = new Linq2Json();
Newtonsoft.Json.Linq.JObject jarray = l2j.GetJObject4();
return jarray.ToString();
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace microstore
{
public class Linq2Json
{
#region GetJObject
//Parsing a JSON Object from text
public Newtonsoft.Json.Linq.JObject GetJObject()
{
string json = @"{
CPU: 'Intel',
Drives: [
'DVD read/writer',
'500 gigabyte hard drive'
]
}";
Newtonsoft.Json.Linq.JObject jobject = Newtonsoft.Json.Linq.JObject.Parse(json);
return jobject;
}
/*
* //example:=>
*
Linq2Json l2j = new Linq2Json();
Newtonsoft.Json.Linq.JObject jobject = l2j.GetJObject2(Server.MapPath("json/Person.json"));
//return Newtonsoft.Json.JsonConvert.SerializeObject(jobject, Newtonsoft.Json.Formatting.Indented);
return jobject.ToString();
*/
//Loading JSON from a file
public Newtonsoft.Json.Linq.JObject GetJObject2(string jsonPath)
{
using (System.IO.StreamReader reader = System.IO.File.OpenText(jsonPath))
{
Newtonsoft.Json.Linq.JObject jobject = (Newtonsoft.Json.Linq.JObject)Newtonsoft.Json.Linq.JToken.ReadFrom(new Newtonsoft.Json.JsonTextReader(reader));
return jobject;
}
}
//Creating JObject
public Newtonsoft.Json.Linq.JObject GetJObject3()
{
List posts = GetPosts();
Newtonsoft.Json.Linq.JObject jobject = Newtonsoft.Json.Linq.JObject.FromObject(new
{
channel = new
{
title = "James Newton-King",
link = "http://james.newtonking.com",
description = "James Newton-King's blog.",
item =
from p in posts
orderby p.Title
select new
{
title = p.Title,
description = p.Description,
link = p.Link,
category = p.Category
}
}
});
return jobject;
}
/*
{
"channel": {
"title": "James Newton-King",
"link": "http://james.newtonking.com",
"description": "James Newton-King's blog.",
"item": [{
"title": "jewron",
"description": "4546fds",
"link": "http://www.baidu.com",
"category": "jhgj"
},
{
"title": "jofdsn",
"description": "mdsfan",
"link": "http://www.baidu.com",
"category": "6546"
},
{
"title": "jokjn",
"description": "m3214an",
"link": "http://www.baidu.com",
"category": "hg425"
},
{
"title": "jon",
"description": "man",
"link": "http://www.baidu.com",
"category": "goodman"
}]
}
}
*/
//Creating JObject
public Newtonsoft.Json.Linq.JObject GetJObject4()
{
List posts = GetPosts();
Newtonsoft.Json.Linq.JObject rss = new Newtonsoft.Json.Linq.JObject(
new Newtonsoft.Json.Linq.JProperty("channel",
new Newtonsoft.Json.Linq.JObject(
new Newtonsoft.Json.Linq.JProperty("title", "James Newton-King"),
new Newtonsoft.Json.Linq.JProperty("link", "http://james.newtonking.com"),
new Newtonsoft.Json.Linq.JProperty("description", "James Newton-King's blog."),
new Newtonsoft.Json.Linq.JProperty("item",
new Newtonsoft.Json.Linq.JArray(
from p in posts
orderby p.Title
select new Newtonsoft.Json.Linq.JObject(
new Newtonsoft.Json.Linq.JProperty("title", p.Title),
new Newtonsoft.Json.Linq.JProperty("description", p.Description),
new Newtonsoft.Json.Linq.JProperty("link", p.Link),
new Newtonsoft.Json.Linq.JProperty("category",
new Newtonsoft.Json.Linq.JArray(
from c in p.Category
select new Newtonsoft.Json.Linq.JValue(c)
)
)
)
)
)
)
)
);
return rss;
}
/*
{
"channel": {
"title": "James Newton-King",
"link": "http://james.newtonking.com",
"description": "James Newton-King's blog.",
"item": [{
"title": "jewron",
"description": "4546fds",
"link": "http://www.baidu.com",
"category": ["j", "h", "g", "j"]
},
{
"title": "jofdsn",
"description": "mdsfan",
"link": "http://www.baidu.com",
"category": ["6", "5", "4", "6"]
},
{
"title": "jokjn",
"description": "m3214an",
"link": "http://www.baidu.com",
"category": ["h", "g", "4", "2", "5"]
},
{
"title": "jon",
"description": "man",
"link": "http://www.baidu.com",
"category": ["g", "o", "o", "d", "m", "a", "n"]
}]
}
}
*/
public class Post
{
public string Title { get; set; }
public string Description { get; set; }
public string Link { get; set; }
public string Category { get; set; }
}
private List GetPosts()
{
List listp = new List()
{
new Post{Title="jon",Description="man",Link="http://www.baidu.com",Category="goodman"},
new Post{Title="jofdsn",Description="mdsfan",Link="http://www.baidu.com",Category="6546"},
new Post{Title="jewron",Description="4546fds",Link="http://www.baidu.com",Category="jhgj"},
new Post{Title="jokjn",Description="m3214an",Link="http://www.baidu.com",Category="hg425"}
};
return listp;
}
#endregion
#region GetJArray
/*
* //example:=>
*
Linq2Json l2j = new Linq2Json();
Newtonsoft.Json.Linq.JArray jarray = l2j.GetJArray();
return Newtonsoft.Json.JsonConvert.SerializeObject(jarray, Newtonsoft.Json.Formatting.Indented);
//return jarray.ToString();
*/
//Parsing a JSON Array from text
public Newtonsoft.Json.Linq.JArray GetJArray()
{
string json = @"[
'Small',
'Medium',
'Large'
]";
Newtonsoft.Json.Linq.JArray jarray = Newtonsoft.Json.Linq.JArray.Parse(json);
return jarray;
}
//Creating JArray
public Newtonsoft.Json.Linq.JArray GetJArray2()
{
Newtonsoft.Json.Linq.JArray array = new Newtonsoft.Json.Linq.JArray();
Newtonsoft.Json.Linq.JValue text = new Newtonsoft.Json.Linq.JValue("Manual text");
Newtonsoft.Json.Linq.JValue date = new Newtonsoft.Json.Linq.JValue(new DateTime(2000, 5, 23));
//add to JArray
array.Add(text);
array.Add(date);
return array;
}
#endregion
//待续...
}
} 测试效果：
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="testjson.aspx.cs" Inherits="microstore.testjson" %>
显示：
序列化对象
表现1：
{ "Name": "Apple", "Expiry": "2014-05-04 02:08:58", "Price": 3.99, "Sizes": null }
[ { "Name": "Apple", "Expiry": "2014-05-04 02:08:58", "Price": 3.99, "Sizes": [ "Small", "Medium", "Large" ] }, { "Name": "Apple", "Expiry": "2014-05-04 02:08:58", "Price": 3.99, "Sizes": [ "Small", "Medium", "Large" ] } ]表现2：
[ { "Name": "Apple", "Expiry": "2014-05-04 02:08:58", "Price": 3.99, "Sizes": [ "Small", "Medium", "Large" ] }, { "Name": "Apple", "Expiry": "2014-05-04 02:08:58", "Price": 3.99, "Sizes": [ "Small", "Medium", "Large" ] } ]相信看了本文案例你已经掌握了方法，更多精彩请关注php中文网其它相关文章！
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