c# - 无法使用枚举隐式转换类型

Question

试图解决这个问题。即使它们实际上是相同的，似乎也无法将一个 num 分配给另一个。

Cannot implicitly convert type 'Project.Models.Concern.YesNo' to 'Project.ViewModels.PatientConcernsViewModel.YesNo'. An explicit conversion exists (are you missing a cast?)

public class Concern
{
    public int ConcernID { get; set; }
    public YesNo LifeExpectancy { get; set; }
    public YesNo CollateralHistoryAvailable { get; set; }

    public enum YesNo
    {
        Yes,
        No
    }
}

public class PatientConcernsViewModel
{
    public int ConcernID { get; set; }

    public YesNo LifeExpectancy { get; set; }        
    public YesNo CollateralHistoryAvailable { get; set; }

    public enum YesNo
    {
        Yes,
        No
    }
}

// FROM WITHIN MY CONTROLLER

var concern = concernRepository.Find(id);

// load related assessment data
var assessment = assessmentRepository.Find(AssessmentID);

PatientConcernsViewModel patientConcernsViewModel = new PatientConcernsViewModel();

// BOTH LINES BELOW GENERATE ERRORS            
patientConcernsViewModel.CollateralHistoryAvailable = concern.CollateralHistoryAvailable;
patientConcernsViewModel.LifeExpectancy = concern.LifeExpectancy;

Answer 1

让您的enum没有类的公共(public) - 然后他们可以在没有多个定义的情况下共享它。

public enum YesNo
{
    Yes,
    No
}

public class Concern
{
    public int ConcernID { get; set; }
    public YesNo LifeExpectancy { get; set; }
    public YesNo CollateralHistoryAvailable { get; set; }
}

public class PatientConcernsViewModel
{
    public int ConcernID { get; set; }

    public YesNo LifeExpectancy { get; set; }        
    public YesNo CollateralHistoryAvailable { get; set; }
}