必须获取对象的当前状态才能存储它或稍后检索它,编码时应考虑这一点,添加自定义代码来输出对象的状态,这在C#中称为将对象转换为Json字符串必须根据我们对对象类型的了解类型,对对象的每个属性进行编码。当对象类型的定义发生变化时,必须更改代码,并且我们利用 Newtonsoft 的 Json.NET 库将对象转换为 C# 中的 Json,它使用代码为我们提供了对象字符串的完整表示用单行写的。
语法:
Variable variable_name =Newtonsoft.Json.JsonConvert.SerializeObject(parameter);
下面给出了提到的示例:
C# 程序,演示对象到 Json 字符串的转换,这只不过是 C# 中对象的序列化。
代码:
using Newtonsoft.Json; using System; using System.Collections.Generic; using System.IO; //a namespace called Serial is defined namespace Serial { //a class called Data is defined public class Data { //a string variable is defined which can be set or retrieved using get or set method public string Name1 { get; set; } //a list is defined which can be set or retrieved using get or set method public List<int> Ids { get; set; } //a method called Print is defined in which the name and the list is printed public void Print() { Console.WriteLine("The Name is: " + Name1); Console.WriteLine("The Identifiers used are: " + string.Join<int>(",", Ids)); Console.WriteLine(); Console.WriteLine(); } } //a class called check is defined public class Check { //a file path is defined and stored in a string variable const string fPath = @"d:\ex.txt"; //Serialize method is defined in which instances of Json writer and Stream writer classes are defined to write into the file public static void Serialize(object ob) { varserialise = new JsonSerializer(); using (var ns = new StreamWriter(fPath)) using (JsonWriter writer1 = new JsonTextWriter(ns)) { serialise.Serialize(writer1, ob); } } //Deserialize method is defined in which instances of Json text reader and Stream reader classes are defined to read from the file public static object Deserialize(string pa) { varserialise = new JsonSerializer(); using (var ns = new StreamReader(pa)) using (var reader1 = new JsonTextReader(ns)) { return serialise.Deserialize(reader1); } } //main method is called public static void Main(string[] args) { vardat = new Data { Name1 = "ShobhaShivakumar", Ids = new List<int>{ 10, 20, 30, 40 } }; Console.WriteLine("Before serialization of the objects, the list of the objects are:"); Console.WriteLine("-------------------------------------------------------------------"); Console.WriteLine(); dat.Print(); Serialize(dat); vardeserialise = Deserialize(fPath); Console.WriteLine("After de-serialization of the object, the objects are:"); Console.WriteLine("---------------------------"); Console.WriteLine(); Console.WriteLine(deserialise); } } }
输出:
说明:
C# 程序来演示程序中手动序列化和 Json 序列化的区别。
代码:
using System; using System.Text; using System.Collections.Generic; //a class called check is defined public class Check { //main method is called public static void Main() { //an instance of the Create request1 class and string builder class is created var request = CreateRequest1(); var output1 = new StringBuilder(); //Since we are using manual serialization here, we have to output the properties manually output1.AppendFormat("The unique ID is: {0}\n", request.UniqueID); output1.AppendFormat("The unique Name is: {0}\n", request.UniqueName); output1.AppendFormat("The unique Surname is: {0}\n", request.UniqueSurname); output1.AppendFormat("The Last Sign In is: {0}\n", request.UniqueLastSignIn); //We need to make use of for loop to output the nested attributes in case of manual serialization output1.AppendFormat("The Attributes are:\n"); foreach (varsh in request.UniqueAttributes) { output1.AppendFormat(" {0}\n", sh); } Console.WriteLine(output1.ToString()); Console.WriteLine(Newtonsoft.Json.JsonConvert.SerializeObject(request); //We are using Json serialization to improve the readability Console.WriteLine(Newtonsoft.Json.JsonConvert.SerializeObject(request, Newtonsoft.Json.Formatting.Indented)); } //a method called Create request1 is defined public static Req CreateRequest1() { return new Req { UniqueID = 10, UniqueName = "Shobha", UniqueSurname = "Shivakumar", UniqueLastSignIn = DateTime.Now, UniqueAttributes = new List<string> { "Beautiful", "Tall", "Intelligent", "Wise", } }; } //a class called req is created public class Req { public intUniqueID {get;set;} public string UniqueName {get;set;} public string UniqueSurname {get;set;} public DateTimeUniqueLastSignIn {get;set;} public List<string>UniqueAttributes {get;set;} } }
输出:
说明:
以上是将对象转换为 JSON C#的详细内容。更多信息请关注PHP中文网其他相关文章!