Исходный код вики Сценарии

Редактировал(а) Alexandr Fokin 2025/02/17 00:08
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Alexandr Fokin 1.13 1 |(% style="width:152px" %)JsonDocument Dispose|(% style="width:1340px" %)(((
2 Обращаю внимание, что JsonDocument реализует интерфейс IDisposable (скорее всего для переиспользования памяти).
3 Не всегда удобно (особенно, если это часть Entity/Dto), но если нужно снизить нагрузку на GC (финализацию), то нужно всегда вызывать Dispose.
4
5 Memory management when using JsonDocument
6 [[https:~~/~~/github.com/npgsql/efcore.pg/issues/1746>>https://github.com/npgsql/efcore.pg/issues/1746]]
Alexandr Fokin 1.14 7
8
9 UPD1:
10 JsonDocument is IDisposable
11 [[https:~~/~~/learn.microsoft.com/en-us/dotnet/standard/serialization/system-text-json/use-dom#jsondocument-is-idisposable>>https://learn.microsoft.com/en-us/dotnet/standard/serialization/system-text-json/use-dom#jsondocument-is-idisposable]]
12 \\В документации сказано, что допустимо использовать JsonElement, выполнив следующую код:
Alexandr Fokin 1.15 13 {{code language="c#"}}public JsonElement GetJson(string jsonString)
Alexandr Fokin 1.14 14 {
15 using (JsonDocument doc = JsonDocument.Parse(jsonString))
16 {
17 return doc.RootElement.Clone();
18 }
19 }{{/code}}
Alexandr Fokin 1.13 20 )))
Alexandr Fokin 1.11 21 |(% style="width:152px" %)Базовые опции|(% style="width:1340px" %)(((
22 (% id="cke_bm_182S" style="display:none" %) (%%)How to customize character encoding with System.Text.Json
Alexandr Fokin 1.1 23 [[https:~~/~~/docs.microsoft.com/en-us/dotnet/standard/serialization/system-text-json-character-encoding>>https://docs.microsoft.com/en-us/dotnet/standard/serialization/system-text-json-character-encoding]]
24
25 {{code language="c#"}}
26 new JsonSerializerOptions()
27 {
28 //Игнорирование null элементы
29 IgnoreNullValues = true,
30 // Форматирование читаемое/компкатный
31 WriteIndented = true,
32
33 // Кодировка символов
34 //Encoder = JavaScriptEncoder.Create(UnicodeRanges.BasicLatin, UnicodeRanges.Cyrillic),
35 Encoder = System.Text.Encodings.Web.JavaScriptEncoder.UnsafeRelaxedJsonEscaping,
36
Alexandr Fokin 1.20 37 // Регистронезависимость
38 // How to enable case-insensitive property name matching with System.Text.Json
39 // https://learn.microsoft.com/en-us/dotnet/standard/serialization/system-text-json/character-casing
40 PropertyNameCaseInsensitive = true,
41
Alexandr Fokin 1.1 42 // Enum как строка
43 Converters = {
44 new System.Text.Json.Serialization.JsonStringEnumConverter()
45 }
46 };
47 {{/code}}
Alexandr Fokin 1.11 48 )))
49 |(% style="width:152px" %)Создание или изменение json объекта|(% style="width:1340px" %)(((
Alexandr Fokin 1.3 50 JsonNode
51 [[https:~~/~~/docs.microsoft.com/en-us/dotnet/api/system.text.json.nodes.jsonnode?view=net-6.0>>https://docs.microsoft.com/en-us/dotnet/api/system.text.json.nodes.jsonnode?view=net-6.0]]
Alexandr Fokin 1.11 52 \\How to add property in existing json using System.Text.Json library?
53 [[https:~~/~~/stackoverflow.com/questions/58302522/how-to-add-property-in-existing-json-using-system-text-json-library>>https://stackoverflow.com/questions/58302522/how-to-add-property-in-existing-json-using-system-text-json-library]]
54 \\Is there a way to convert between JsonDocument and JsonNode?
Alexandr Fokin 1.3 55 [[https:~~/~~/stackoverflow.com/questions/73047801/is-there-a-way-to-convert-between-jsondocument-and-jsonnode>>https://stackoverflow.com/questions/73047801/is-there-a-way-to-convert-between-jsondocument-and-jsonnode]]
Alexandr Fokin 1.11 56 )))
Alexandr Fokin 1.12 57 |(% style="width:152px" %)Распознать строковые значения как число.|(% style="width:1340px" %){{code language="c#"}}[JsonNumberHandling(JsonNumberHandling.AllowReadingFromString)]
58 // или
59 new JsonSerializerOptions()
60 {
61 NumberHandling = JsonNumberHandling.AllowReadingFromString
62 }{{/code}}(((
63
64
Alexandr Fokin 1.2 65 System.Text.Json: Deserialize JSON with automatic casting
Alexandr Fokin 1.11 66 [[https:~~/~~/stackoverflow.com/questions/59097784/system-text-json-deserialize-json-with-automatic-casting>>https://stackoverflow.com/questions/59097784/system-text-json-deserialize-json-with-automatic-casting]]
67 )))
68 |(% style="width:152px" %)JsonConverter.
Alexandr Fokin 1.21 69 Реализация собственной (кастомной) логики сериализации типов|(% style="width:1340px" %)(((
Alexandr Fokin 1.11 70 How to write custom converters for JSON serialization (marshalling) in .NET
Alexandr Fokin 1.4 71 [[https:~~/~~/learn.microsoft.com/en-us/dotnet/standard/serialization/system-text-json/converters-how-to?pivots=dotnet-6-0>>https://learn.microsoft.com/en-us/dotnet/standard/serialization/system-text-json/converters-how-to?pivots=dotnet-6-0]]
72
73 System.Text.Json deserialization fails with JsonException "read to much or not enough"
74 [[https:~~/~~/stackoverflow.com/questions/62147178/system-text-json-deserialization-fails-with-jsonexception-read-to-much-or-not-e>>https://stackoverflow.com/questions/62147178/system-text-json-deserialization-fails-with-jsonexception-read-to-much-or-not-e]]
Alexandr Fokin 1.11 75 )))
Alexandr Fokin 1.22 76 |(% style="width:152px" %)Обход свойств|(% style="width:1340px" %){{code language="c#"}}EnumerateObject(){{/code}}