C# JsonSerializer.Serialize 在生成的json中添加键值
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【中文标题】C# JsonSerializer.Serialize 在生成的json中添加键值【英文标题】：C# JsonSerializer.Serialize add key value in the generated json 【发布时间】：2021-03-11 17:50:50 【问题描述】：我需要按 2 个字段对表中的数据进行分组，以便为最终用户对可视化进行分类，我尝试这样做，只是生成的 json 不包含作为类别名称的键。
我的桌子：
var niveis = _repository.GetAll();
var queryNestedGroups =
(from con in niveis
group con by con.Modulo into newGroup1
from newGroup2 in
(from con in newGroup1
group con by con.Submod)
group newGroup2 by newGroup1.Key).ToList();
结果
JsonSerializer.Serialize(queryNestedGroups)
[
[
[
"Id": 1,
"IdMod": 1,
"Modulo": "Catalogo",
"Submod": "Produtos",
"Nome": "Visualizar Produtos",
"Valor": "CAT_PROD_LISTA"
,
"Id": 2,
"IdMod": 1,
"Modulo": "Catalogo",
"Submod": "Produtos",
"Nome": "Gravar Produtos",
"Valor": "CAT_PROD_GRAVA"
,
"Id": 3,
"IdMod": 1,
"Modulo": "Catalogo",
"Submod": "Produtos",
"Nome": "Excluir Produtos",
"Valor": "CAT_PROD_EXCLUI"
],
[
"Id": 4,
"IdMod": 1,
"Modulo": "Catalogo",
"Submod": "Grupos",
"Nome": "Visualizar Grupos",
"Valor": "CAT_GRUPO_LISTA"
,
"Id": 5,
"IdMod": 1,
"Modulo": "Catalogo",
"Submod": "Grupos",
"Nome": "Gravar Grupos",
"Valor": "CAT_GRUPO_GRAVA"
,
"Id": 6,
"IdMod": 1,
"Modulo": "Catalogo",
"Submod": "Grupos",
"Nome": "Excluir Grupos",
"Valor": "CAT_GRUPO_EXCLUI"
],
[
"Id": 7,
"IdMod": 1,
"Modulo": "Catalogo",
"Submod": "Categorias",
"Nome": "Visualizar Catagorias",
"Valor": "CAT_CAT_LISTA"
,
"Id": 8,
"IdMod": 1,
"Modulo": "Catalogo",
"Submod": "Categorias",
"Nome": "Gravar Categorias",
"Valor": "CAT_CAT_GRAVA"
,
"Id": 9,
"IdMod": 1,
"Modulo": "Catalogo",
"Submod": "Categorias",
"Nome": "Excluir Categorias",
"Valor": "CAT_CAT_EXCLUI"
],
[
"Id": 10,
"IdMod": 1,
"Modulo": "Catalogo",
"Submod": "Unidades",
"Nome": "Visualizar Unidades",
"Valor": "CAT_UNIT_LISTA"
,
"Id": 11,
"IdMod": 1,
"Modulo": "Catalogo",
"Submod": "Unidades",
"Nome": "Gravar Unidades",
"Valor": "CAT_UNIT_GRAVA"
,
"Id": 12,
"IdMod": 1,
"Modulo": "Catalogo",
"Submod": "Unidades",
"Nome": "Excluir Unidades",
"Valor": "CAT_UNIT_EXCLUI"
],
[
"Id": 13,
"IdMod": 1,
"Modulo": "Catalogo",
"Submod": "Marcas",
"Nome": "Visualizar Marcas",
"Valor": "CAT_MARCA_LISTA"
,
"Id": 14,
"IdMod": 1,
"Modulo": "Catalogo",
"Submod": "Marcas",
"Nome": "Gravar Marcas",
"Valor": "CAT_MARCA_GRAVA"
,
"Id": 15,
"IdMod": 1,
"Modulo": "Catalogo",
"Submod": "Marcas",
"Nome": "Excluir Marcas",
"Valor": "CAT_MARCA_EXCLUI"
],
[
"Id": 16,
"IdMod": 1,
"Modulo": "Catalogo",
"Submod": "Atributos",
"Nome": "Visualizar Atributos",
"Valor": "CAT_ATTR_LISTA"
,
"Id": 17,
"IdMod": 1,
"Modulo": "Catalogo",
"Submod": "Atributos",
"Nome": "Gravar Atributos",
"Valor": "CAT_ATTR_GRAVA"
,
"Id": 18,
"IdMod": 1,
"Modulo": "Catalogo",
"Submod": "Atributos",
"Nome": "Excluir Atributos",
"Valor": "CAT_ATTR_EXCLUI"
],
[
"Id": 19,
"IdMod": 1,
"Modulo": "Catalogo",
"Submod": "Especifica\u00E7\u00F5es",
"Nome": "Visualizar Especifica\u00E7\u00E3o",
"Valor": "CAT_SPEC_LISTA"
,
"Id": 20,
"IdMod": 1,
"Modulo": "Catalogo",
"Submod": "Especifica\u00E7\u00F5es",
"Nome": "Gravar Especifica\u00E7\u00E3o",
"Valor": "CAT_SPEC_GRAVA"
,
"Id": 21,
"IdMod": 1,
"Modulo": "Catalogo",
"Submod": "Especifica\u00E7\u00F5es",
"Nome": "Excluir Especifica\u00E7\u00E3o",
"Valor": "CAT_SPEC_EXCLUI"
]
],
[
[
"Id": 22,
"IdMod": 2,
"Modulo": "Cadastros",
"Submod": "Fornecedores",
"Nome": "Visualizar Fornecedor",
"Valor": "CAD_FORN_LISTA"
,
"Id": 23,
"IdMod": 2,
"Modulo": "Cadastros",
"Submod": "Fornecedores",
"Nome": "Gravar Fornecedor",
"Valor": "CAD_FORN_GRAVA"
,
"Id": 24,
"IdMod": 2,
"Modulo": "Cadastros",
"Submod": "Fornecedores",
"Nome": "Excluir Fornecedor",
"Valor": "CAD_FORN_EXCLUI"
],
[
"Id": 25,
"IdMod": 2,
"Modulo": "Cadastros",
"Submod": "Clientes",
"Nome": "Visualizar Cliente",
"Valor": "CAD_CLI_LISTA"
,
"Id": 26,
"IdMod": 2,
"Modulo": "Cadastros",
"Submod": "Clientes",
"Nome": "Gravar Cliente",
"Valor": "CAD_CLI_GRAVA"
,
"Id": 27,
"IdMod": 2,
"Modulo": "Cadastros",
"Submod": "Clientes",
"Nome": "Excluir Cliente",
"Valor": "CAD_CLI_EXCLUI"
]
],
[
[
"Id": 28,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "Bancos",
"Nome": "Visualizar Bancos",
"Valor": "CONFIG_BANCOS_LISTA"
,
"Id": 29,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "Bancos",
"Nome": "Gravar Bancos",
"Valor": "CONFIG_BANCOS_GRAVA"
,
"Id": 30,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "Bancos",
"Nome": "Excluir Bancos",
"Valor": "CONFIG_BANCOS_EXCLUI"
],
[
"Id": 31,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "Estados/Cidade",
"Nome": "Visualizar Estados/Cidade",
"Valor": "CONFIG_UFCID_LISTA"
,
"Id": 32,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "Estados/Cidade",
"Nome": "Gravar Estados/Cidade",
"Valor": "CONFIG_UFCID_GRAVA"
,
"Id": 33,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "Estados/Cidade",
"Nome": "Excluir Estados/Cidade",
"Valor": "CONFIG_UFCID_EXCLUI"
],
[
"Id": 34,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "Condi\u00E7\u00F5es de pagamento",
"Nome": "Visualizar condi\u00E7\u00E3o de pagamento",
"Valor": "CONFIG_CONDP_LISTA"
,
"Id": 35,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "Condi\u00E7\u00F5es de pagamento",
"Nome": "Gravar condi\u00E7\u00E3o de pagamento",
"Valor": "CONFIG_CONDP_GRAVA"
,
"Id": 36,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "Condi\u00E7\u00F5es de pagamento",
"Nome": "Excluir condi\u00E7\u00E3o de pagamento",
"Valor": "CONFIG_CONDP_EXCLUI"
],
[
"Id": 37,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "Tributa\u00E7\u00E3o CFOP",
"Nome": "Visualizar CFOP",
"Valor": "CONFIG_TRIBUT_CFOP_LISTA"
,
"Id": 38,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "Tributa\u00E7\u00E3o CFOP",
"Nome": "Gravar CFOP",
"Valor": "CONFIG_TRIBUT_CFOP_GRAVA"
,
"Id": 39,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "Tributa\u00E7\u00E3o CFOP",
"Nome": "Excluir CFOP",
"Valor": "CONFIG_TRIBUT_CFOP_EXCLUI"
],
[
"Id": 40,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "CST ICMS",
"Nome": "Visualizar CST ICMS",
"Valor": "CONFIG_TRIBUT_CSTICMS_LISTA"
,
"Id": 41,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "CST ICMS",
"Nome": "Gravar CST ICMS",
"Valor": "CONFIG_TRIBUT_CSTICMS_GRAVA"
,
"Id": 42,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "CST ICMS",
"Nome": "Excluir CST ICMS",
"Valor": "CONFIG_TRIBUT_CSTICMS_EXCLUI"
],
[
"Id": 43,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "CST IPI",
"Nome": "Visualizar CST IPI",
"Valor": "CONFIG_TRIBUT_CSTIPI_LISTA"
,
"Id": 44,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "CST IPI",
"Nome": "Gravar CST IPI",
"Valor": "CONFIG_TRIBUT_CSTIPI_GRAVA"
,
"Id": 45,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "CST IPI",
"Nome": "Excluir CST IPI",
"Valor": "CONFIG_TRIBUT_CSTIPI_EXCLUI"
],
[
"Id": 46,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "CST PIS/COFINS",
"Nome": "Visualizar CST PIS/COFINS",
"Valor": "CONFIG_TRIBUT_PISCOFINS_LISTA"
,
"Id": 47,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "CST PIS/COFINS",
"Nome": "Gravar CST PIS/COFINS",
"Valor": "CONFIG_TRIBUT_PISCOFINS_GRAVA"
,
"Id": 48,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "CST PIS/COFINS",
"Nome": "Excluir CST PIS/COFINS",
"Valor": "CONFIG_TRIBUT_PISCOFINS_EXCLUI"
],
[
"Id": 49,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "ICMS UF",
"Nome": "Visualizar ICMS UF",
"Valor": "CONFIG_TRIBUT_ICMSUF_LISTA"
,
"Id": 50,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "ICMS UF",
"Nome": "Gravra ICMS UF",
"Valor": "CONFIG_TRIBUT_ICMSUF_GRAVA"
,
"Id": 51,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "ICMS UF",
"Nome": "Excluir ICMS UF",
"Valor": "CONFIG_TRIBUT_ICMSUF_EXCLUI"
],
[
"Id": 52,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "ORIGENS",
"Nome": "Visualizar ORIGENS",
"Valor": "CONFIG_TRIBUT_ORIGENS_LISTA"
,
"Id": 53,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "ORIGENS",
"Nome": "Gravar ORIGENS",
"Valor": "CONFIG_TRIBUT_ORIGENS_GRAVA"
,
"Id": 54,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "ORIGENS",
"Nome": "Excluir ORIGENS",
"Valor": "CONFIG_TRIBUT_ORIGENS_EXCLUI"
],
[
"Id": 55,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "FORMA PAG.",
"Nome": "Visualizar FORMA PAG.",
"Valor": "CONFIG_TRIBUT_FORMAPAG_LISTA"
,
"Id": 56,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "FORMA PAG.",
"Nome": "Gravar FORMA PAG.",
"Valor": "CONFIG_TRIBUT_FORMAPAG_GRAVA"
,
"Id": 57,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "FORMA PAG.",
"Nome": "Excluir FORMA PAG.",
"Valor": "CONFIG_TRIBUT_FORMAPAG_EXCLUI"
],
[
"Id": 58,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "Integra\u00E7\u00E3o Fiscal",
"Nome": "Visualizar Integra\u00E7\u00E3o Fiscal",
"Valor": "CONFIG_TRIBUT_INTF_LISTA"
,
"Id": 59,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "Integra\u00E7\u00E3o Fiscal",
"Nome": "Gravar Integra\u00E7\u00E3o Fiscal",
"Valor": "CONFIG_TRIBUT_INTF_GRAVA"
,
"Id": 60,
"IdMod": 3,
"Modulo": "Configura\u00E7\u00F5es",
"Submod": "Integra\u00E7\u00E3o Fiscal",
"Nome": "Excluir Integra\u00E7\u00E3o Fiscal",
"Valor": "CONFIG_TRIBUT_INTF_EXCLUI"
]
],
[
[
"Id": 67,
"IdMod": 4,
"Modulo": "Empresa",
"Submod": "Lojas",
"Nome": "Visualizar Lojas",
"Valor": "EMPRESA_LOJAS_LISTA"
,
"Id": 68,
"IdMod": 4,
"Modulo": "Empresa",
"Submod": "Lojas",
"Nome": "Gravar Lojas",
"Valor": "EMPRESA_LOJAS_GRAVA"
,
"Id": 69,
"IdMod": 4,
"Modulo": "Empresa",
"Submod": "Lojas",
"Nome": "Excluir Lojas",
"Valor": "EMPRESA_LOJAS_EXCLUI"
],
[
"Id": 70,
"IdMod": 4,
"Modulo": "Empresa",
"Submod": "Depositos",
"Nome": "Visualizar Depositos",
"Valor": "EMPRESA_DEP_LISTA"
,
"Id": 71,
"IdMod": 4,
"Modulo": "Empresa",
"Submod": "Depositos",
"Nome": "Gravar Depositos",
"Valor": "EMPRESA_DEP_GRAVA"
,
"Id": 72,
"IdMod": 4,
"Modulo": "Empresa",
"Submod": "Depositos",
"Nome": "Excluir Depositos",
"Valor": "EMPRESA_DEP_EXCLUI"
]
]
]
不包括键值。 如何在生成的 json 中包含密钥，因为我将在前端的 foreach 中使用它？ 谢谢！
【问题讨论】：
能否请您edit 分享minimal reproducible example 的问题？另外，能否请您edit 将您的代码和 JSON 包含为 text 而不是屏幕截图？这里最好不要将图像用于文本数据，请参阅 Discourage screenshots of code and/or errors 和 Why not upload images of code on SO when asking a question 了解原因。 请说明您正在使用 which JSON Serializer - Newtonsoft 或 System.Text.Json（或其他 -请说明）IGrouping<TKey,TElement> 实现IEnumerable<TElement>。 System.Text.Json 和 Json.NET 将枚举序列化为数组，而不是对象。有关原因，请参阅 JSON serialize properties on class inheriting list 和 How do I get json.net to serialize members of a class deriving from List<T>。如果您需要解决方法，我们需要查看 minimal reproducible example 并了解您正在使用的序列化程序。
【参考方案1】：
Json.NET 为集合属性 (IEnumerable) 或 Dictionary<TKey, TValue> 序列化 "key": [ array ] 结构，它不知道如何序列化具有属性和可枚举元素的类。
您也不能使用[JsonProperty("key")] public IEnumerable<T> Items get; set; ，因为在编译时您不知道"key" 的值。
您可以从您的分组中创建一个讨厌的嵌套字典，并将其序列化：
var queryNestedDictionaries = queryNestedGroups.ToDictionary(g => g.Key,
v => v.Values.ToDictionary(gg => gg.Key, gg => gg.Values));
或者为IGrouping<TKey, TValue>创建一个自定义转换器，并将键写入属性名称，将值写入数组。
【讨论】：
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