Json.NET使用入门(六)【LINQ to JSON】
来源：互联网 发布：计算机绘图软件 编辑：程序博客网 时间：2024/06/18 17:23
手动创建JSON
本示例以编程方式一次创建JObject和JArray实例。
JArray array = new JArray(); array.Add("Manual text"); array.Add(new DateTime(2000, 5, 23)); JObject o = new JObject(); o["MyArray"] = array; string json = o.ToString(); // { // "MyArray": [ // "Manual text", // "2000-05-23T00:00:00" // ] // }使用集合初始化器创建JSON
JObject o = new JObject { { "Cpu", "Intel" }, { "Memory", 32 }, { "Drives", new JArray { "DVD", "SSD" } } }; Console.WriteLine(o.ToString()); // { // "Cpu": "Intel", // "Memory": 32, // "Drives": [ // "DVD", // "SSD" // ] // }用LINQ声明创建JSON
public class Post{ public string Title { get; set; } public string Description { get; set; } public string Link { get; set; } public IList<string> Categories { get; set; }}List<Post> posts = GetPosts();JObject rss = new JObject( new JProperty("channel", new JObject( new JProperty("title", "James Newton-King"), new JProperty("link", "http://james.newtonking.com"), new JProperty("description", "James Newton-King's blog."), new JProperty("item", new JArray( from p in posts orderby p.Title select new JObject( new JProperty("title", p.Title), new JProperty("description", p.Description), new JProperty("link", p.Link), new JProperty("category", new JArray( from c in p.Categories select new JValue(c)))))))));Console.WriteLine(rss.ToString());// {// "channel": {// "title": "James Newton-King",// "link": "http://james.newtonking.com",// "description": "James Newton-King's blog.",// "item": [// {// "title": "Json.NET 1.3 + New license + Now on CodePlex",// "description": "Annoucing the release of Json.NET 1.3, the MIT license and being available on CodePlex",// "link": "http://james.newtonking.com/projects/json-net.aspx",// "category": [// "Json.NET",// "CodePlex"// ]// },// {// "title": "LINQ to JSON beta",// "description": "Annoucing LINQ to JSON",// "link": "http://james.newtonking.com/projects/json-net.aspx",// "category": [// "Json.NET",// "LINQ"// ]// }// ]// }// }动态创建JSON
本示例使用C#动态功能创建JObject和JArray实例。
dynamic product = new JObject();product.ProductName = "Elbow Grease";product.Enabled = true;product.Price = 4.90m;product.StockCount = 9000;product.StockValue = 44100;product.Tags = new JArray("Real", "OnSale");Console.WriteLine(product.ToString());// {// "ProductName": "Elbow Grease",// "Enabled": true,// "Price": 4.90,// "StockCount": 9000,// "StockValue": 44100,// "Tags": [// "Real",// "OnSale"// ]// }使用JTokenWriter创建JSON
JTokenWriter writer = new JTokenWriter();writer.WriteStartObject();writer.WritePropertyName("name1");writer.WriteValue("value1");writer.WritePropertyName("name2");writer.WriteStartArray();writer.WriteValue(1);writer.WriteValue(2);writer.WriteEndArray();writer.WriteEndObject();JObject o = (JObject)writer.Token;Console.WriteLine(o.ToString());// {// "name1": "value1",// "name2": [// 1,// 2// ]// }从对象创建JSON
这个示例使用JToken.FromObject(Object)将.NET值转换为LINQ to JSON
public class Computer{ public string Cpu { get; set; } public int Memory { get; set; } public IList<string> Drives { get; set; }}JValue i = (JValue)JToken.FromObject(12345);Console.WriteLine(i.Type);// IntegerConsole.WriteLine(i.ToString());// 12345JValue s = (JValue)JToken.FromObject("A string");Console.WriteLine(s.Type);// StringConsole.WriteLine(s.ToString());// A stringComputer computer = new Computer{ Cpu = "Intel", Memory = 32, Drives = new List<string> { "DVD", "SSD" }};JObject o = (JObject)JToken.FromObject(computer);Console.WriteLine(o.ToString());// {// "Cpu": "Intel",// "Memory": 32,// "Drives": [// "DVD",// "SSD"// ]// }JArray a = (JArray)JToken.FromObject(computer.Drives);Console.WriteLine(a.ToString());// [// "DVD",// "SSD"// ]从匿名类型创建JSON
public class Post{ public string Title { get; set; } public string Description { get; set; } public string Link { get; set; } public IList<string> Categories { get; set; }}List<Post> posts = new List<Post>{ new Post { Title = "Episode VII", Description = "Episode VII production", Categories = new List<string> { "episode-vii", "movie" }, Link = "episode-vii-production.aspx" }};JObject o = JObject.FromObject(new{ channel = new { title = "Star Wars", link = "http://www.starwars.com", description = "Star Wars blog.", item = from p in posts orderby p.Title select new { title = p.Title, description = p.Description, link = p.Link, category = p.Categories } }});Console.WriteLine(o.ToString());// {// "channel": {// "title": "Star Wars",// "link": "http://www.starwars.com",// "description": "Star Wars blog.",// "item": [// {// "title": "Episode VII",// "description": "Episode VII production",// "link": "episode-vii-production.aspx",// "category": [// "episode-vii",// "movie"// ]// }// ]// }// }使用JArray.Parse解析JSON数组
string json = @"[ 'Small', 'Medium', 'Large']";JArray a = JArray.Parse(json);Console.WriteLine(a.ToString());// [// "Small",// "Medium",// "Large"// ]使用JObject.Parse解析JSON对象
string json = @"{ CPU: 'Intel', Drives: [ 'DVD read/writer', '500 gigabyte hard drive' ]}";JObject o = JObject.Parse(json);Console.WriteLine(o.ToString());// {// "CPU": "Intel",// "Drives": [// "DVD read/writer",// "500 gigabyte hard drive"// ]// }使用JToken.Parse解析所有的JSON
JToken t1 = JToken.Parse("{}");Console.WriteLine(t1.Type);// ObjectJToken t2 = JToken.Parse("[]");Console.WriteLine(t2.Type);// ArrayJToken t3 = JToken.Parse("null");Console.WriteLine(t3.Type);// NullJToken t4 = JToken.Parse(@"'A string!'");Console.WriteLine(t4.Type);// String使用LINQ从JSON反序列化
public class BlogPost{ public string Title { get; set; } public string AuthorName { get; set; } public string AuthorTwitter { get; set; } public string Body { get; set; } public DateTime PostedDate { get; set; }}string json = @"[ { 'Title': 'Json.NET is awesome!', 'Author': { 'Name': 'James Newton-King', 'Twitter': '@JamesNK', 'Picture': '/jamesnk.png' }, 'Date': '2013-01-23T19:30:00', 'BodyHtml': '<h3>Title!</h3>\r\n<p>Content!</p>' }]";JArray blogPostArray = JArray.Parse(json);IList<BlogPost> blogPosts = blogPostArray.Select(p => new BlogPost{ Title = (string)p["Title"], AuthorName = (string)p["Author"]["Name"], AuthorTwitter = (string)p["Author"]["Twitter"], PostedDate = (DateTime)p["Date"], Body = HttpUtility.HtmlDecode((string)p["BodyHtml"])}).ToList();Console.WriteLine(blogPosts[0].Body);// <h3>Title!</h3>// <p>Content!</p>使用LINQ序列化为JSON
本示例使用LINQ to JSON手动将.NET类型转换为JSON
public class BlogPost{ public string Title { get; set; } public string AuthorName { get; set; } public string AuthorTwitter { get; set; } public string Body { get; set; } public DateTime PostedDate { get; set; }}IList<BlogPost> blogPosts = new List<BlogPost>{ new BlogPost { Title = "Json.NET is awesome!", AuthorName = "James Newton-King", AuthorTwitter = "JamesNK", PostedDate = new DateTime(2013, 1, 23, 19, 30, 0), Body = @"<h3>Title!</h3> <p>Content!</p>" }};JArray blogPostsArray = new JArray( blogPosts.Select(p => new JObject { { "Title", p.Title }, { "Author", new JObject { { "Name", p.AuthorName }, { "Twitter", p.AuthorTwitter } } }, { "Date", p.PostedDate }, { "BodyHtml", HttpUtility.HtmlEncode(p.Body) }, }) );Console.WriteLine(blogPostsArray.ToString());// [// {// "Title": "Json.NET is awesome!",// "Author": {// "Name": "James Newton-King",// "Twitter": "JamesNK"// },// "Date": "2013-01-23T19:30:00",// "BodyHtml": "<h3>Title!</h3>\r\n<p>Content!</p>"// }// ]修改JSON
此示例加载JSON，修改JObject和JArray实例，然后再次写出JSON
string json = @"{ 'channel': { 'title': 'Star Wars', 'link': 'http://www.starwars.com', 'description': 'Star Wars blog.', 'obsolete': 'Obsolete value', 'item': [] }}";JObject rss = JObject.Parse(json);JObject channel = (JObject)rss["channel"];channel["title"] = ((string)channel["title"]).ToUpper();channel["description"] = ((string)channel["description"]).ToUpper();channel.Property("obsolete").Remove();channel.Property("description").AddAfterSelf(new JProperty("new", "New value"));JArray item = (JArray)channel["item"];item.Add("Item 1");item.Add("Item 2");Console.WriteLine(rss.ToString());// {// "channel": {// "title": "STAR WARS",// "link": "http://www.starwars.com",// "description": "STAR WARS BLOG.",// "new": "New value",// "item": [// "Item 1",// "Item 2"// ]// }// }合并JSON
此示例将LINQ to JSON对象合并
JObject o1 = JObject.Parse(@"{ 'FirstName': 'John', 'LastName': 'Smith', 'Enabled': false, 'Roles': [ 'User' ]}");JObject o2 = JObject.Parse(@"{ 'Enabled': true, 'Roles': [ 'User', 'Admin' ]}");o1.Merge(o2, new JsonMergeSettings{ // union array values together to avoid duplicates MergeArrayHandling = MergeArrayHandling.Union});string json = o1.ToString();// {// "FirstName": "John",// "LastName": "Smith",// "Enabled": true,// "Roles": [// "User",// "Admin"// ]// }查询JSON
此示例加载JSON，然后使用Item[Object] 索引器从其中查询值，然后将返回的标记转换为.NET值
string json = @"{ 'channel': { 'title': 'James Newton-King', 'link': 'http://james.newtonking.com', 'description': 'James Newton-King\'s blog.', 'item': [ { 'title': 'Json.NET 1.3 + New license + Now on CodePlex', 'description': 'Annoucing the release of Json.NET 1.3, the MIT license and the source on CodePlex', 'link': 'http://james.newtonking.com/projects/json-net.aspx', 'category': [ 'Json.NET', 'CodePlex' ] }, { 'title': 'LINQ to JSON beta', 'description': 'Annoucing LINQ to JSON', 'link': 'http://james.newtonking.com/projects/json-net.aspx', 'category': [ 'Json.NET', 'LINQ' ] } ] }}";JObject rss = JObject.Parse(json);string rssTitle = (string)rss["channel"]["title"];Console.WriteLine(rssTitle);// James Newton-Kingstring itemTitle = (string)rss["channel"]["item"][0]["title"];Console.WriteLine(itemTitle);// Json.NET 1.3 + New license + Now on CodePlexJArray categories = (JArray)rss["channel"]["item"][0]["category"];Console.WriteLine(categories);// [// "Json.NET",// "CodePlex"// ]string[] categoriesText = categories.Select(c => (string)c).ToArray();Console.WriteLine(string.Join(", ", categoriesText));// Json.NET, CodePlex用动态查询JSON
此示例加载JSON，然后使用C#动态功能从中查询值
string json = @"[ { 'Title': 'Json.NET is awesome!', 'Author': { 'Name': 'James Newton-King', 'Twitter': '@JamesNK', 'Picture': '/jamesnk.png' }, 'Date': '2013-01-23T19:30:00', 'BodyHtml': '<h3>Title!</h3>\r\n<p>Content!</p>' }]";dynamic blogPosts = JArray.Parse(json);dynamic blogPost = blogPosts[0];string title = blogPost.Title;Console.WriteLine(title);// Json.NET is awesome!string author = blogPost.Author.Name;Console.WriteLine(author);// James Newton-KingDateTime postDate = blogPost.Date;Console.WriteLine(postDate);// 23/01/2013 7:30:00 p.m.用LINQ查询JSON
string json = @"{ 'channel': { 'title': 'James Newton-King', 'link': 'http://james.newtonking.com', 'description': 'James Newton-King\'s blog.', 'item': [ { 'title': 'Json.NET 1.3 + New license + Now on CodePlex', 'description': 'Annoucing the release of Json.NET 1.3, the MIT license and the source on CodePlex', 'link': 'http://james.newtonking.com/projects/json-net.aspx', 'category': [ 'Json.NET', 'CodePlex' ] }, { 'title': 'LINQ to JSON beta', 'description': 'Annoucing LINQ to JSON', 'link': 'http://james.newtonking.com/projects/json-net.aspx', 'category': [ 'Json.NET', 'LINQ' ] } ] }}";JObject rss = JObject.Parse(json);var postTitles = from p in rss["channel"]["item"] select (string)p["title"];foreach (var item in postTitles){ Console.WriteLine(item);}//LINQ to JSON beta//Json.NET 1.3 + New license + Now on CodePlexvar categories = from c in rss["channel"]["item"].Children()["category"].Values<string>() group c by c into g orderby g.Count() descending select new { Category = g.Key, Count = g.Count() };foreach (var c in categories){ Console.WriteLine(c.Category + " - Count: " + c.Count);}//Json.NET - Count: 2//LINQ - Count: 1//CodePlex - Count: 1用SelectToken查询JSON
此示例加载JSON，然后使用 SelectToken(String)从它查询值。
JObject o = JObject.Parse(@"{ 'Stores': [ 'Lambton Quay', 'Willis Street' ], 'Manufacturers': [ { 'Name': 'Acme Co', 'Products': [ { 'Name': 'Anvil', 'Price': 50 } ] }, { 'Name': 'Contoso', 'Products': [ { 'Name': 'Elbow Grease', 'Price': 99.95 }, { 'Name': 'Headlight Fluid', 'Price': 4 } ] } ]}");string name = (string)o.SelectToken("Manufacturers[0].Name");Console.WriteLine(name);// Acme Codecimal productPrice = (decimal)o.SelectToken("Manufacturers[0].Products[0].Price");Console.WriteLine(productPrice);// 50string productName = (string)o.SelectToken("Manufacturers[1].Products[0].Name");Console.WriteLine(productName);// Elbow Grease用SelectToken查询JSON并转义属性
此示例加载JSON时需要使用 SelectToken(String)查询时需要转义的属性
JObject o = JObject.Parse(@"{ 'Space Invaders': 'Taito', 'Doom ]|[': 'id', ""Yar's Revenge"": 'Atari', 'Government ""Intelligence""': 'Make-Believe'}");string spaceInvaders = (string)o.SelectToken("['Space Invaders']");// Taitostring doom3 = (string)o.SelectToken("['Doom ]|[']");// idstring yarsRevenge = (string)o.SelectToken("['Yar\\'s Revenge']");// Ataristring governmentIntelligence = (string)o.SelectToken("['Government \"Intelligence\"']");// Make-Believe用SelectToken和LINQ查询JSON
此示例加载JSON，然后使用SelectToken(String)和LINQ运算符的组合来从中查询值。
JObject o = JObject.Parse(@"{ 'Stores': [ 'Lambton Quay', 'Willis Street' ], 'Manufacturers': [ { 'Name': 'Acme Co', 'Products': [ { 'Name': 'Anvil', 'Price': 50 } ] }, { 'Name': 'Contoso', 'Products': [ { 'Name': 'Elbow Grease', 'Price': 99.95 }, { 'Name': 'Headlight Fluid', 'Price': 4 } ] } ]}");string[] storeNames = o.SelectToken("Stores").Select(s => (string)s).ToArray();Console.WriteLine(string.Join(", ", storeNames));// Lambton Quay, Willis Streetstring[] firstProductNames = o["Manufacturers"].Select(m => (string)m.SelectToken("Products[1].Name")) .Where(n => n != null).ToArray();Console.WriteLine(string.Join(", ", firstProductNames));// Headlight Fluiddecimal totalPrice = o["Manufacturers"].Sum(m => (decimal)m.SelectToken("Products[0].Price"));Console.WriteLine(totalPrice);// 149.95用JSONPath查询JSON
此示例加载JSON，然后使用带有JSONPath查询的SelectToken(String)从其中查询值。
JObject o = JObject.Parse(@"{ 'Stores': [ 'Lambton Quay', 'Willis Street' ], 'Manufacturers': [ { 'Name': 'Acme Co', 'Products': [ { 'Name': 'Anvil', 'Price': 50 } ] }, { 'Name': 'Contoso', 'Products': [ { 'Name': 'Elbow Grease', 'Price': 99.95 }, { 'Name': 'Headlight Fluid', 'Price': 4 } ] } ]}");// manufacturer with the name 'Acme Co'JToken acme = o.SelectToken("$.Manufacturers[?(@.Name == 'Acme Co')]");Console.WriteLine(acme);// { "Name": "Acme Co", Products: [{ "Name": "Anvil", "Price": 50 }] }// name of all products priced 50 and aboveIEnumerable<JToken> pricyProducts = o.SelectTokens("$..Products[?(@.Price >= 50)].Name");foreach (JToken item in pricyProducts){ Console.WriteLine(item);}// Anvil// Elbow Grease从文件中读取JSON
JObject o1 = JObject.Parse(File.ReadAllText(@"c:\videogames.json"));// read JSON directly from a fileusing (StreamReader file = File.OpenText(@"c:\videogames.json"))using (JsonTextReader reader = new JsonTextReader(file)){ JObject o2 = (JObject)JToken.ReadFrom(reader);}将JSON写入一个文件
JObject videogameRatings = new JObject( new JProperty("Halo", 9), new JProperty("Starcraft", 9), new JProperty("Call of Duty", 7.5));File.WriteAllText(@"c:\videogames.json", videogameRatings.ToString());// write JSON directly to a fileusing (StreamWriter file = File.CreateText(@"c:\videogames.json"))using (JsonTextWriter writer = new JsonTextWriter(file)){ videogameRatings.WriteTo(writer);}将JSON转换为集合
此示例使用ToObject<T>()将LINQ to JSON对象转换为.NET类型
string json = @"{ 'd': [ { 'Name': 'John Smith' }, { 'Name': 'Mike Smith' } ]}";JObject o = JObject.Parse(json);JArray a = (JArray)o["d"];IList<Person> person = a.ToObject<IList<Person>>();Console.WriteLine(person[0].Name);// John SmithConsole.WriteLine(person[1].Name);// Mike Smith将JSON转换为值
此示例使用ToObject<T>()将LINQ to JSON对象转换为.NET类型
JValue v1 = new JValue(true);bool b = v1.ToObject<bool>();Console.WriteLine(b);// trueint i = v1.ToObject<int>();Console.WriteLine(i);// 1string s = v1.ToObject<string>();Console.WriteLine(s);// "True"将JSON转换为类型
此示例使用 ToObject(Type)将LINQ to JSON对象转换为.NET类型
JValue v1 = new JValue(true);bool b = (bool)v1.ToObject(typeof(bool));Console.WriteLine(b);// trueint i = (int)v1.ToObject(typeof(int));Console.WriteLine(i);// 1string s = (string)v1.ToObject(typeof(string));Console.WriteLine(s);// "True"转换JValue
此示例将JValue实例转换为.NET值
JValue v1 = new JValue("1");int i = (int)v1;Console.WriteLine(i);// 1JValue v2 = new JValue(true);bool b = (bool)v2;Console.WriteLine(b);// trueJValue v3 = new JValue("19.95");decimal d = (decimal)v3;Console.WriteLine(d);// 19.95JValue v4 = new JValue(new DateTime(2013, 1, 21));string s = (string)v4;Console.WriteLine(s);// 01/21/2013 00:00:00JValue v5 = new JValue("http://www.bing.com");Uri u = (Uri)v5;Console.WriteLine(u);// http://www.bing.com/JValue v6 = JValue.CreateNull();u = (Uri)v6;Console.WriteLine((u != null) ? u.ToString() : "{null}");// {null}DateTime? dt = (DateTime?)v6;Console.WriteLine((dt != null) ? dt.ToString() : "{null}");// {null}使用JValue.Value
JValue s = new JValue("A string value");Console.WriteLine(s.Value.GetType().Name);// StringConsole.WriteLine(s.Value);// A string valueJValue u = new JValue(new Uri("http://www.google.com/"));Console.WriteLine(u.Value.GetType().Name);// UriConsole.WriteLine(u.Value);// http://www.google.com/使用JObject.Properties
此示例使用Properties()获取对象的JProperty集合
JObject o = new JObject{ { "name1", "value1" }, { "name2", "value2" }};foreach (JProperty property in o.Properties()){ Console.WriteLine(property.Name + " - " + property.Value);}// name1 - value1// name2 - value2foreach (KeyValuePair<string, JToken> property in o){ Console.WriteLine(property.Key + " - " + property.Value);}// name1 - value1// name2 - value2使用LINQ to JSON注解
本示例使用LINQ to JSON对象的注释
JObject o = JObject.Parse(@"{ 'name': 'Bill G', 'age': 58, 'country': 'United States', 'employer': 'Microsoft'}");o.AddAnnotation(new HashSet<string>());o.PropertyChanged += (sender, args) => o.Annotation<HashSet<string>>().Add(args.PropertyName);o["age"] = 59;o["employer"] = "Bill & Melinda Gates Foundation";HashSet<string> changedProperties = o.Annotation<HashSet<string>>();// age// employer比较JSON和JToken.DeepEquals
此示例使用DeepEquals(JToken, JToken)比较JToken实例,比较令牌和所有子令牌
JValue s1 = new JValue("A string");JValue s2 = new JValue("A string");JValue s3 = new JValue("A STRING");Console.WriteLine(JToken.DeepEquals(s1, s2));// trueConsole.WriteLine(JToken.DeepEquals(s2, s3));// falseJObject o1 = new JObject{ { "Integer", 12345 }, { "String", "A string" }, { "Items", new JArray(1, 2) }};JObject o2 = new JObject{ { "Integer", 12345 }, { "String", "A string" }, { "Items", new JArray(1, 2) }};Console.WriteLine(JToken.DeepEquals(o1, o2));// trueConsole.WriteLine(JToken.DeepEquals(s1, o1["String"]));// true使用JToken.DeepClone克隆JSON
此示例使用 DeepClone()递归地克隆一个JToken及其所有子项
JObject o1 = new JObject{ { "String", "A string!" }, { "Items", new JArray(1, 2) }};Console.WriteLine(o1.ToString());// {// "String": "A string!",// "Items": [// 1,// 2// ]// }JObject o2 = (JObject)o1.DeepClone();Console.WriteLine(o2.ToString());// {// "String": "A string!",// "Items": [// 1,// 2// ]// }Console.WriteLine(JToken.DeepEquals(o1, o2));// trueConsole.WriteLine(Object.ReferenceEquals(o1, o2));// false用JToken.ToString写JSON文本
本示例将LINQ to JSON对象转换为JSON
JObject o = JObject.Parse(@"{'string1':'value','integer2':99,'datetime3':'2000-05-23T00:00:00'}");Console.WriteLine(o.ToString());// {// "string1": "value",// "integer2": 99,// "datetime3": "2000-05-23T00:00:00"// }Console.WriteLine(o.ToString(Formatting.None));// {"string1":"value","integer2":99,"datetime3":"2000-05-23T00:00:00"}Console.WriteLine(o.ToString(Formatting.None, new JavaScriptDateTimeConverter()));// {"string1":"value","integer2":99,"datetime3":new Date(959032800000)}与JsonConverter一起使用JToken.ToString
本示例使用JsonConverter来自定义将LINQ to JSON对象转换为JSON
JObject o = JObject.Parse(@"{'string1':'value','integer2':99,'datetime3':'2000-05-23T00:00:00'}");Console.WriteLine(o.ToString(Formatting.None, new JavaScriptDateTimeConverter()));// {"string1":"value","integer2":99,"datetime3":new Date(959032800000)}使用JToken.CreateReader
本示例从JToken创建一个JTokenReader
JObject o = new JObject{ { "Cpu", "Intel" }, { "Memory", 32 }, { "Drives", new JArray { "DVD", "SSD" } }};JsonReader reader = o.CreateReader();while (reader.Read()){ Console.Write(reader.TokenType); if (reader.Value != null) { Console.Write(" - " + reader.Value); } Console.WriteLine();}// StartObject// PropertyName - Cpu// String - Intel// PropertyName - Memory// Integer - 32// PropertyName - Drives// StartArray// String - DVD// String - SSD// EndArray// EndObject使用JToken.CreateWriter
本示例从JToken创建一个JTokenWriter
JObject o = new JObject{ { "name1", "value1" }, { "name2", "value2" }};JsonWriter writer = o.CreateWriter();writer.WritePropertyName("name3");writer.WriteStartArray();writer.WriteValue(1);writer.WriteValue(2);writer.WriteEndArray();Console.WriteLine(o.ToString());// {// "name1": "value1",// "name2": "value2",// "name3": [// 1,// 2// ]// }从BSON读取
本示例使用BsonReader从BSON读取JObject
byte[] data = Convert.FromBase64String("KQAAAAJuYW1lMQAHAAAAdmFsdWUxAAJuYW1lMgAHAAAAdmFsdWUyAAA=");MemoryStream ms = new MemoryStream(data);JObject o;using (BsonReader reader = new BsonReader(ms)){ o = (JObject)JToken.ReadFrom(reader);}string value = (string)o["name1"];Console.WriteLine(value);// value1写为BSON
本示例使用BsonWriter将JObject写入BSON
JObject o = new JObject{ { "name1", "value1" }, { "name2", "value2" }};MemoryStream ms = new MemoryStream();using (BsonWriter writer = new BsonWriter(ms)){ o.WriteTo(writer);}string data = Convert.ToBase64String(ms.ToArray());Console.WriteLine(data);// KQAAAAJuYW1lMQAHAAAAdmFsdWUxAAJuYW1lMgAHAAAAdmFsdWUyAAA=阅读全文
0 0
- Json.NET使用入门(六)【LINQ to JSON】
- Linq to JSON/Json.NET
- Json.Net之Linq To JSON
- Json.net/Newtonsoft 3.0 新特性JObject/Linq to Json
- Json.net/Newtonsoft 新特性JObject/Linq to Json
- Json.Net系列教程 4.Linq To JSON
- Json.NET使用入门(四)【XML和JSON互转】
- Json.NET使用入门(四)【复杂Json反序列化】
- Json.NET使用入门(一)【序列化】
- Json.NET使用入门(三)【设置】
- Json.net入门基础
- [Json.net]快速入门
- C# Newtonsoft.Json之LINQ To Json实例(一)
- C# Newtonsoft.Json之LINQ To Json实例(二)
- .net json转换 json to object & object to json
- JSon使用入门
- json.net的使用
- asp、net使用json
- 今日头条前端面试经验
- Map集合/异常/IO流
- 使用vitamio做直播demo
- 宽度优先探索（bfs）
- CSDN
- Json.NET使用入门(六)【LINQ to JSON】
- LINK : fatal error LNK1104: 无法打开文件“libboost_serialization-vc90-mt-gd-1_62.lib”
- MikroTik
- bzoj 3720: Gty的妹子树
- WAP页面兑换不了商品原因分析
- Java中的转义字符
- javaweb_ubuntu服务器安装tomcat
- android与sp通讯
- 科普一下，什么是戴维斯双击和戴维斯双杀？
