Newtonsoft.Json设置忽略某些字段

using Newtonsoft.Json;
using Newtonsoft.Json.Serialization;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace TestProject1
{/// <summary>/// 输出json时，设置忽略哪些字段不要/// </summary>public class PropsContractResolver : DefaultContractResolver{/// <summary>/// 要忽略的字段集合，Key传入字段名称/// </summary>public Dictionary<string, bool> IgnoreProps { get; set; }public PropsContractResolver(Dictionary<string, bool>  ignoreProps){IgnoreProps = ignoreProps;}protected override IList<JsonProperty> CreateProperties(Type type, MemberSerialization memberSerialization){IList<JsonProperty> list = base.CreateProperties(type, memberSerialization);//只保留清单有列出的属性return list.Where(p =>{//去掉的字段//string[] ignoreProps = { "Password", "Encrypted_salt" };// if (p.PropertyName.Equals("Password"))//if (ignoreProps.Contains(p.PropertyName))//{//    //去掉字段//    return false;//}if (p.PropertyName!=null && IgnoreProps.ContainsKey(p.PropertyName)){return false;//去掉字段}return true;//保留字段}).ToList();}}
}

  [TestMethod]public async Task TestMethod1(){//注册接口var builder = WebApplication.CreateBuilder();ServicesRegister.Register(builder);var app = builder.Build();         AppServicesHelpter.App = app;IAh_userBll userBll = AppServicesHelpter.GetServices<IAh_userBll>();Ah_user ah_User = await userBll.GetAsync(130042493512608);//忽略字段JsonSerializerSettings settings = new JsonSerializerSettings();var props = new Dictionary<string, bool>() ;props.Add("Password",false);props.Add("Encrypted_salt", false);props.Add("Extend1", false);props.Add("Extend2", false);props.Add("P", false);props.Add("PageSize", false);props.Add("Creator", false);props.Add("Create_time", false);    settings.ContractResolver = new PropsContractResolver(props);string json=Newtonsoft.Json.JsonConvert.SerializeObject(ah_User, settings);}

Ah_user

using System;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using WebProjectNet7.DataBaseEntity.BaseEntity;namespace WebProjectNet7.DataBaseEntity.Entity
{/// <summary>/// 实体，用户表/// </summary>[Table("ah_user")]public partial class Ah_user : BaseModel{/// <summary>/// 用户名称/// </summary>public string? User_name { get; set; }/// <summary>/// 用户编号（员工编号）/// </summary>public string? User_no { get; set; }/// <summary>/// 性别 /// 1为男，2为女/// </summary>public byte? Sex { get; set; }/// <summary>/// 出生日期/// </summary>public string? Birth_date { get; set; }/// <summary>/// 电话/// </summary>public string? Tel { get; set; }/// <summary>/// 邮箱/// </summary>public string? Email { get; set; }/// <summary>/// 证件类型/// EnumIDType，枚举/// </summary>public byte? Id_type { get; set; }/// <summary>/// 证件号/// </summary>public string? Id_number { get; set; }/// <summary>/// 角色Id，多个，用,分割/// </summary>public string?  Role_id { get; set; }/// <summary>/// 角色名称/// </summary>public string? Role_name { get; set; }/// <summary>/// 部门Id/// </summary>public long? Organization_id { get; set; }/// <summary>/// 部门名称/// </summary>public string? Organization_name { get; set; }/// <summary>/// 账号/// </summary>public string? Account { get; set; }/// <summary>/// 密码/// </summary>public string? Password { get; set; }/// <summary>/// 密码加盐/// </summary>public string? Encrypted_salt { get; set; }/// <summary>/// 启用状态 1=启用，2=禁用/// </summary>public byte? Status { get; set; }/// <summary>/// 创建时间/// </summary>public DateTime? Create_time { get; set; }/// <summary>/// 创建人/// </summary>public long?  Creator { get; set; }/// <summary>/// 修改时间/// </summary>public DateTime? Update_time { get; set; }/// <summary>/// 修改人/// </summary>public long? Updator { get; set; }}
}

返回结果：

{"User_name": "武松","User_no": "1001","Sex": null,"Birth_date": "2024年01月03日","Tel": "15874584685","Email": "[e-mail]","Id_type": 1,"Id_number": "51053692484156685","Role_id": "146759246945184","Role_name": "吏部尚书","Organization_id": 130041939348384,"Organization_name": "大理寺","Account": "wusong","Status": 1,"Update_time": "2024-02-19T17:54:41.847","Updator": 130042493512608,"Id": 130042493512608
}

参考文章：
https://www.tnblog.net/aojiancc2/article/details/2828