Unduh JsonExtensions - Unduh Kode Sumber JsonExtensions

JSonextensions

Kumpulan ekstensi untuk .net System.text.json

SingleorarrayjsonConverter

JSONConverter yang menghapus unggun satu objek JSON dan array JSON sebagai array C#.

Dengan JsonConverter default

 public sealed class Example
{
  [ JsonConverter ( typeof ( SingleOrArrayJsonConverter ) ) ]
  public string [ ] ? Array { get ; set ; }
}

 const string jsonSingle = """{"Array": "single"}""" ;
var deserializedSingle = JsonSerializer . Deserialize < Example > ( jsonSingle ) ;
Console . WriteLine ( $ " { deserializedSingle . Array . Length } : { deserializedSingle . Array [ 0 ] } " ) ;
// Output: "1: single"

const string jsonArray = """{"Array": ["first", "second"]}""" ;
var deserializedArray = JsonSerializer . Deserialize < Example > ( jsonArray ) ;
Console . WriteLine ( $ " { deserializedArray . Array . Length } : { deserializedArray . Array [ 0 ] } , { deserializedArray . Array [ 1 ] } " ) ;
// Output: "2: first, second"

Dengan jsonConverter khusus

 public sealed class Person
{
  public string FirstName { get ; }
  public string LastName { get ; }

  public Person ( string firstName , string lastName )
  {
    FirstName = firstName ;
    LastName = lastName ;
  }
}

// Converts a Person object into a "${FirstName} ${LastName}" string
public sealed class PersonJsonConverter : JsonConverter < string >
{
  public override string ? Read ( ref Utf8JsonReader reader , Type typeToConvert , JsonSerializerOptions options )
  {
    var personConverter = ( JsonConverter < Person > ) options . GetConverter ( typeof ( Person ) ) ;

    Person ? person = personConverter . Read ( ref reader , typeof ( Person ) , options ) ;

    return person != null ? $ " { person . FirstName } { person . LastName } " : null ;
  }

  public override void Write ( Utf8JsonWriter writer , string value , JsonSerializerOptions options )
  {
    var personConverter = ( JsonConverter < Person > ) options . GetConverter ( typeof ( Person ) ) ;

    var split = value . Split ( ' ' ) ;
    var firstName = split [ 0 ] ;
    var lastName = split [ 1 ] ;
    var person = new Person ( firstName , lastName ) ;

    personConverter . Write ( writer , person , options ) ;
  }
}

public sealed class Example
{
  [ JsonConverter ( typeof ( SingleOrArrayJsonConverter < PersonJsonConverter > ) ) ]
  public string [ ] ? Array { get ; set ; }
}

 const string jsonSingle = """{"Array": {"FirstName": "John", "LastName": "Smith"}}""" ;
var deserializedSingle = JsonSerializer . Deserialize < Example > ( json ) ;
Console . WriteLine ( $ " { deserializedSingle . Array . Length } : { deserializedSingle . Array [ 0 ] } " ) ;
// Output: "1: John Smith"

const string jsonArray = """{"Array": [{"FirstName": "John", "LastName": "Smith"}, {"FirstName": "John", "LastName": "Doe"}]}""" ;
var deserializedArray = JsonSerializer . Deserialize < Example > ( json ) ;
Console . WriteLine ( $ " { deserializedArray . Array . Length } : { deserializedArray . Array [ 0 ] } , { deserializedArray . Array [ 1 ] } " ) ;
// Output: "2: John Smith, John Doe"

Jsonmultinamemodifier

Atribut JSONPROPERTYNAM dan JSONMULTINAMEMODIFIER yang memungkinkan pemetaan beberapa kunci JSON ke satu properti C#.

Memungkinkan tombol duplikat

 public sealed class User
{
  [ JsonPropertyNames ( "UserName" , "User" , "Name" ) ]
  public string UserName { get ; set ; }
}

 JsonSerializerOptions jsonOptions = new ( )
{
  TypeInfoResolver = new DefaultJsonTypeInfoResolver ( )
  {
    Modifiers = { Modifiers . JsonMultiNameModifier }
  }
}

const string json1 = """{"UserName": "JohnSmith1"}""" ;
const string json2 = """{"User": "JohnSmith2"}""" ;
const string json3 = """{"Name": "JohnSmith3"}""" ;
var deserialized = JsonSerializer . Deserialize < User > ( json1 , jsonOptions ) ;
Console . WriteLine ( deserialized . UserName ) ;
// Output: "JohnSmith1"
deserialized = JsonSerializer . Deserialize < User > ( json2 , jsonOptions ) ;
Console . WriteLine ( deserialized . UserName ) ;
// Output: "JohnSmith2"
deserialized = JsonSerializer . Deserialize < User > ( json3 , jsonOptions ) ;
Console . WriteLine ( deserialized . UserName ) ;
// Output: "JohnSmith3"

string json = """{"UserName": "JohnSmith1", "User": "JohnSmith2", "Name": "JohnSmith3"}""" ;
deserialized = JsonSerializer . Deserialize < User > ( json , jsonOptions ) ;
Console . WriteLine ( deserialized . UserName ) ;
// Output: "JohnSmith3"

json = JsonSerializer . Serialize ( deserialized , jsonOptions ) ;
Console . WriteLine ( json ) ;
// Output: '{"UserName":"JohnSmith3"}'

Melarang kunci duplikat

 public sealed class User
{
  [ JsonPropertyNames ( throwOnDuplicate : true , "UserName" , "User" , "Name" ) ]
  public string UserName { get ; set ; }
}

 JsonSerializerOptions jsonOptions = new ( )
{
  TypeInfoResolver = new DefaultJsonTypeInfoResolver ( )
  {
    Modifiers = { Modifiers . JsonMultiNameModifier }
  }
}

const string json1 = """{"UserName": "JohnSmith1"}""" ;
const string json2 = """{"User": "JohnSmith2"}""" ;
const string json3 = """{"Name": "JohnSmith3"}""" ;
var deserialized = JsonSerializer . Deserialize < User > ( json1 , jsonOptions ) ;
Console . WriteLine ( deserialized . UserName ) ;
// Output: "JohnSmith1"
deserialized = JsonSerializer . Deserialize < User > ( json2 , jsonOptions ) ;
Console . WriteLine ( deserialized . UserName ) ;
// Output: "JohnSmith2"
deserialized = JsonSerializer . Deserialize < User > ( json3 , jsonOptions ) ;
Console . WriteLine ( deserialized . UserName ) ;
// Output: "JohnSmith3"

try {
  const string json = """{"UserName": "JohnSmith1", "User": "JohnSmith2", "Name": "JohnSmith3"}""" ;
  deserialized = JsonSerializer . Deserialize < User > ( json , jsonOptions ) ;
  Console . WriteLine ( deserialized . UserName ) ;
} catch ( JsonException ) {
  Console . WriteLine ( "Deserialize failed" ) ;
}
// Output: "Deserialize failed"

Kunci serialisasi yang berbeda

 public sealed class User
{
  [ JsonPropertyNames ( serializationName : "NickName" , "UserName" , "User" , "Name" ) ]
  public string UserName { get ; set ; }
}

 JsonSerializerOptions jsonOptions = new ( )
{
  TypeInfoResolver = new DefaultJsonTypeInfoResolver ( )
  {
    Modifiers = { Modifiers . JsonMultiNameModifier }
  }
}

string json = """{"UserName": "JohnSmith"}""" ;
var deserialized = JsonSerializer . Deserialize < User > ( json , jsonOptions ) ;
Console . WriteLine ( deserialized . UserName ) ;
// Output: "JohnSmith"

json = JsonSerializer . Serialize ( deserialized , jsonOptions ) ;
Console . WriteLine ( json ) ;
// Output: '{"NickName":"JohnSmith"}'

Lisensi MIT

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

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