C# 使用Newtonsoft.Json的JsonProperty设置返回的Json数据列名/C# 通过实体类序列化生成自定义字段的json数据

原文链接：https://blog.csdn.net/weixin_44917045/article/details/103236167

                 https://blog.csdn.net/bazinga_y/article/details/134416680

在写分页的时候，返回Json数据给前台的时候，数据不能出来，原因就是Json数据的列名是大写的，而页面需要的是小写的。

 解决办法

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public class PageResult<T> {     [JsonProperty("total")]     public long Total { get; set; }       [JsonProperty("rows")]     public List<T> Rows { get; set; } }

　　

 

 

使用JsonProperty注解中的PropertyName 属性可以自定json字段名称，NullValueHandling 属性，为Include时，当该字段没有赋值时，生成json数据会包含该字段；当为Ignore时，该字段没有赋值时，生成json数据，会忽略该字段。
以下是实体示例：

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public class FundCollection {       /// <summary>     /// 组织编码     /// 是否必填：是     /// </summary>     [JsonProperty(PropertyName = "pk_org", NullValueHandling = NullValueHandling.Include)]     public string PkOrg { get; set; }       /// <summary>     /// 单据编号     /// 是否必填：否     /// </summary>       [JsonProperty(PropertyName = "bill_no", NullValueHandling = NullValueHandling.Ignore)]     public string BillNo { get; set; }       /// <summary>     /// 部门编码     /// 是否必填：否     /// </summary>     [JsonProperty(PropertyName = "pk_dept", NullValueHandling = NullValueHandling.Ignore)]     public string PkDept { get; set; }       /// <summary>     /// 结算方式编码     /// 是否必填：是     /// </summary>     [JsonProperty(PropertyName = "pk_balatype", NullValueHandling = NullValueHandling.Include)]     public string PkBalatype { get; set; }       /// <summary>     /// 单据日期     /// 是否必填：否     /// </summary>     [JsonProperty(PropertyName = "bill_date", NullValueHandling = NullValueHandling.Ignore)]     public string BillDate { get; set; }       /// <summary>     /// 币种编码     /// 是否必填：否     /// </summary>     [JsonProperty(PropertyName = "pk_currtype", NullValueHandling = NullValueHandling.Ignore)]     public string PkCurrtype { get; set; }       /// <summary>     /// 收款银行账户     /// 是否必填：是     /// </summary>     [JsonProperty(PropertyName = "pk_account", NullValueHandling = NullValueHandling.Include)]     public string PkAccount { get; set; }       /// <summary>     /// 备注     /// 收款时合并字段（供应商+费用类型）展示摘要中       /// 例如：收XX公司平台使用费     /// 是否必填：否     /// </summary>     [JsonProperty(PropertyName = "memo", NullValueHandling = NullValueHandling.Ignore)]     public string Memo { get; set; }       /// <summary>     /// 自定义项1 银行流水编码     /// 是否必填：否     /// </summary>     [JsonProperty(PropertyName = "def1", NullValueHandling = NullValueHandling.Ignore)]     public string Def1 { get; set; }       /// <summary>     /// 制单人用户编码     /// 是否必填：是     /// </summary>     [JsonProperty(PropertyName = "billmaker", NullValueHandling = NullValueHandling.Include)]     public string Billmaker { get; set; }       /// <summary>     /// 来源系统编码     /// 是否必填：是     /// </summary>     [JsonProperty(PropertyName = "source_flag", NullValueHandling = NullValueHandling.Include)]     public string SourceFlag { get; set; }       /// <summary>     /// 客户编码     /// 是否必填：是     /// </summary>     [JsonProperty(PropertyName = "pk_customer", NullValueHandling = NullValueHandling.Include)]     public string PkCustomer { get; set; }       /// <summary>     /// json数组 传入多个对象     /// 是否必填：是     /// </summary>     [JsonProperty(PropertyName = "body", NullValueHandling = NullValueHandling.Include)]     public List<FundCollectionBody> BodyList { get; set; }   }   public class FundCollectionBody {       /// <summary>     /// 币种编码     /// 是否必填：否     /// </summary>     [JsonProperty(PropertyName = "pk_currtype", NullValueHandling = NullValueHandling.Ignore)]     public string PkCurrtype { get; set; }       /// <summary>     /// 单据日期     /// 是否必填：否     /// </summary>     [JsonProperty(PropertyName = "bill_date", NullValueHandling = NullValueHandling.Ignore)]     public string BillDate { get; set; }       /// <summary>     /// 收款原币金额     /// 是否必填：是     /// </summary>     [JsonProperty(PropertyName = "rec_primal", NullValueHandling = NullValueHandling.Include)]     public string RecPrimal { get; set; }       /// <summary>     /// 税类别     /// 是否必填：否     /// </summary>     [JsonProperty(PropertyName = "def1", NullValueHandling = NullValueHandling.Ignore)]     public string Def1 { get; set; }       /// <summary>     /// 贸易方式     /// 是否必填：否     /// </summary>     [JsonProperty(PropertyName = "def2", NullValueHandling = NullValueHandling.Ignore)]     public string Def2 { get; set; }       /// <summary>     /// 税率     /// 是否必填：否     /// </summary>     [JsonProperty(PropertyName = "def3", NullValueHandling = NullValueHandling.Ignore)]     public string Def3 { get; set; }       /// <summary>     /// 税金     /// 是否必填：否     /// </summary>     [JsonProperty(PropertyName = "def4", NullValueHandling = NullValueHandling.Ignore)]     public string Def4 { get; set; }       /// <summary>     /// 创建时间     /// 是否必填：否     /// </summary>     [JsonProperty(PropertyName = "creationtime", NullValueHandling = NullValueHandling.Ignore)]     public string Creationtime { get; set; }       /// <summary>     /// 付款银行账号 供应商账户名称     /// 是否必填：是     /// </summary>     [JsonProperty(PropertyName = "pk_oppaccount", NullValueHandling = NullValueHandling.Include)]     public string PkOppaccount { get; set; }       /// <summary>     /// 客户编码     /// 是否必填：否     /// </summary>     [JsonProperty(PropertyName = "pk_customer", NullValueHandling = NullValueHandling.Ignore)]     public string PkCustomer { get; set; }       /// <summary>     /// 收款银行账号     /// 是否必填：是     /// </summary>     [JsonProperty(PropertyName = "pk_account", NullValueHandling = NullValueHandling.Include)]     public string PkAccount { get; set; }         /// <summary>     /// 收款时合并字段（供应商+费用类型）展示摘要中       /// 例如：收XX公司平台使用费     /// 是否必填：否     /// </summary>     [JsonProperty(PropertyName = "memo", NullValueHandling = NullValueHandling.Ignore)]     public string Memo { get; set; } }

　　以下是调用示例：

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FundCollection fund = new FundCollection(); fund.BillNo = "PF-202301-00001"; fund.Billmaker = "10880D"; var list = new List<FundCollectionBody>(); FundCollectionBody body = new FundCollectionBody {     PkCurrtype = "类型",     Memo = "备注标识" }; list.Add(body); fund.BodyList = list; var serializerSettings = new JsonSerializerSettings {     // 设置为驼峰命名     ContractResolver = new CamelCasePropertyNamesContractResolver() }; var jsonData= JsonConvert.SerializeObject(fund, (Newtonsoft.Json.Formatting)System.Xml.Formatting.None, serializerSettings);

　　以下是生成的json数据：

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1	{"pk_org":null,"bill_no":"PF-202301-00001","pk_balatype":null,"pk_account":null,"billmaker":"10880D","source_flag":null,"pk_customer":null,"body":[{"pk_currtype":"类型","rec_primal":null,"pk_oppaccount":null,"pk_account":null,"memo":"备注标识"}]}