Dotnet webapi项目中get请求后对象数据为空

Question

我创建了两个模型类 Organization.cs 和 Employee.cs

public class Organisation
    {
        private static string organisationName="FALCON";
        private int employeeCount=2;
        private string ceoName;
        private List<string> departmentNames;
        [JsonIgnore]
        private List<Employee> employees;
        private List<Address> addesses;
        private bool isCeoChangeAvailable= true;
        public string OrganisationName 
        {
            get {return organisationName;} 
            set {organisationName = value;} 
        }
        public int EmployeeCount
        {
            get {return employeeCount;}
            set { employeeCount = value; }
        }
        public string CeoName 
        {
            get { return ceoName; }
            set { ceoName = value; } 
        }
        public List<string> Departments 
        { 
            get { return departmentNames; } 
            set { departmentNames = value; } 
        }
        [IgnoreDataMember]
        public List<Employee> Employees 
        {
            get {return employees; }
            set {employees=value; } 
        }
        public List<Address> OfficeAdresses 
        { 
            get {return addesses; } 
            set { addesses = value; } 
        }
        public bool IsCeoChange 
        { 
            get{ return isCeoChangeAvailable; }
            set { isCeoChangeAvailable = value; } 
        }
        public Organisation(string ceoName,List<string> departments,List<Address> addresses)
        {
            this.CeoName = ceoName;
            this.Departments = departments;
            this.OfficeAdresses = addresses;

        }
        public Organisation() { }
    }

，并且员工类

public class Employee
    {
        private Guid employeeId;
        private string name;
        private string departmentName;
        private bool isManager;
        private int salary;

        public Guid Id
        {
            get
            { return employeeId;}
            set
            { employeeId = value;}
        }
        public string Name 
        { 
            get 
            { return name;} 
            set 
            { name = value;} 
        }

        public bool IsManager 
        {
            get 
            { return isManager;} 
            set 
            { isManager = value;} 
        }
        public string DepartmentName 
        {
            get { return departmentName;}
            set { departmentName = value;} 
        }
        public int Salary 
        { 
            get { return salary; } 
            set { salary = value; } }
        public Employee()
        {
            
        }
    }

有两个用于员工和组织的控制器，我试图发布组织数据并将其存储在变量中。

在我的组织控制器中，我有这个方法

public IActionResult PostOrganisationData(Organisation organisation) 
        {
            _organisationData.PostOrganisationDetails(organisation);
            return Created(HttpContext.Request.Scheme + "://" + HttpContext.Request.Host + HttpContext.Request.Path + "/" + organisation.OrganisationName, organisation);
        }

在我的数据层中有一个类 MockEmployeeData ，它实现 IOrganizationData 接口 这是我构建 Organization 对象并将其分配给 Organization 对象的实例的代码。在请求期间组织对象保存分配的数据。下面是代码

private Organisation organisation = new Organisation();
public Organisation PostOrganisationDetails(Organisation organisation)
        {
            Organisation organisationObject = new Organisation(organisation.CeoName, organisation.Departments, organisation.OfficeAdresses);
            organisation = organisationObject;
            return organisation;
        }

当我调用 Get 操作方法从控制器获取组织详细信息时，先前分配的对象具有 null 属性。这是 get 方法

[HttpGet]
[Route("api/[controller]")]
public IActionResult GetOrganisationDetails()
{
    var organisationData=_organisationData.GetOrganisationData();
    return Ok(organisationData);
}

 public Organisation GetOrganisationData()
 {
      Organisation organisationObject = new Organisation();
      organisationObject = organisation;
      return organisationObject;
 }

在这个方法中，我分配一个变量，该变量保存之前从发布请求分配的数据，并返回所有属性现在都变为空的对象。请帮我解决这个问题

Answer 1

您需要将 Organization 模型类中的属性设置为可为空。现在，您可以通过手动使类中的每个属性可为空来实现此目的：

public class Organisation
{
    public string? OrganisationName 
    {
        get {return organisationName;} 
        set {organisationName = value;} 
    }
    public int? EmployeeCount
    {
        get {return employeeCount;}
        set { employeeCount = value; }
    }
    public string? CeoName 
    {
        get { return ceoName; }
        set { ceoName = value; } 
    }
    public List<string?> Departments 
    { 
        get { return departmentNames; } 
        set { departmentNames = value; } 
    }

    ....so on

或者您可以通过编辑包含项目属性的 csproj 文件来全局启用此属性：

<PropertyGroup>
   <TargetFramework>net6.0</TargetFramework>
   <!--<Nullable>enable</Nullable>-->
   <ImplicitUsings>enable</ImplicitUsings>
</PropertyGroup>