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<IPerson> { //重写abstract class CustomCreationConverter<T>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("<p>{0}</p>", 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<Product> plist = new List<Product>(); plist.Add(product); plist.Add(product); string json = Newtonsoft.Json.JsonConvert.SerializeObject(plist, Newtonsoft.Json.Formatting.Indented); return string.Format("<p>{0}</p>", 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<Product>(strjson); string template = @"<p><ul> <li>{0}</li> <li>{1}</li> <li>{2}</li> <li>{3}</li> </ul></p>"; 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<Product> plist = Newtonsoft.Json.JsonConvert.DeserializeObject<List<Product>>(string.Format("[{0},{1}]", strjson, strjson)); string template = @"<p><ul> <li>{0}</li> <li>{1}</li> <li>{2}</li> <li>{3}</li> </ul></p>"; 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<IPerson> people = Newtonsoft.Json.JsonConvert.DeserializeObject<List<IPerson>>(strJson, new PersonConverter()); IPerson person = people[0]; string template = @"<p><ul> <li>当前List<IPerson>[x]对象类型：{0}</li> <li>FirstName：{1}</li> <li>LastName：{2}</li> <li>BirthDate：{3}</li> <li>Department：{4}</li> <li>JobTitle：{5}</li> </ul></p>"; 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<string, string> dic = Newtonsoft.Json.JsonConvert.DeserializeObject<Dictionary<string, string>>(json); string template = @"<li>key：{0}，value：{1}</li>"; System.Text.StringBuilder strb = new System.Text.StringBuilder(); strb.Append("Dictionary<string, string>长度" + dic.Count.ToString() + "<ul>"); dic.AsQueryable().ToList().ForEach(x => { strb.AppendLine(string.Format(template, x.Key, x.Value)); }); strb.Append("</ul>"); 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<string> ReleaseCountries { get; set; } } /// <summary> /// 完整序列化输出 /// </summary> 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; } /// <summary> /// 忽略空（Null）对象输出 /// </summary> /// <returns></returns> public string IgnoredSerialize() { 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 { NullValueHandling = Newtonsoft.Json.NullValueHandling.Ignore } ); return included; } #endregion public class Product { public string Name { get; set; } public string Expiry { get; set; } public Decimal Price { get; set; } public string[] Sizes { get; set; } } #region DefaultValueHandling默认值 public class Invoice { public string Company { get; set; } public decimal Amount { get; set; } // false is default value of bool public bool Paid { get; set; } // null is default value of nullable public DateTime? PaidDate { get; set; } // customize default values [System.ComponentModel.DefaultValue(30)] public int FollowUpDays { get; set; } [System.ComponentModel.DefaultValue("")] public string FollowUpEmailAddress { get; set; } } public void GG() { Invoice invoice = new Invoice { Company = "Acme Ltd.", Amount = 50.0m, Paid = false, FollowUpDays = 30, FollowUpEmailAddress = string.Empty, PaidDate = null }; string included = Newtonsoft.Json.JsonConvert.SerializeObject( invoice, Newtonsoft.Json.Formatting.Indented, new Newtonsoft.Json.JsonSerializerSettings { } ); // { // "Company": "Acme Ltd.", // "Amount": 50.0, // "Paid": false, // "PaidDate": null, // "FollowUpDays": 30, // "FollowUpEmailAddress": "" // } string ignored = Newtonsoft.Json.JsonConvert.SerializeObject( invoice, Newtonsoft.Json.Formatting.Indented, new Newtonsoft.Json.JsonSerializerSettings { DefaultValueHandling = Newtonsoft.Json.DefaultValueHandling.Ignore } ); // { // "Company": "Acme Ltd.", // "Amount": 50.0 // } } #endregion #region JsonIgnoreAttribute and DataMemberAttribute 特性 public string OutIncluded() { Car car = new Car { Model = "zhangsan", Year = DateTime.Now, Features = new List<string> { "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<string> 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<Newtonsoft.Json.Serialization.JsonProperty> CreateProperties(Type type, Newtonsoft.Json.MemberSerialization memberSerialization) { IList<Newtonsoft.Json.Serialization.JsonProperty> 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://", "category": [ "g", "o", "o", "d", "m", "a", "n" ] } ] } }

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