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
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：
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：
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：
{"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"}]}
