C# - 将属性值从一个实例复制到另一个不同的类

Question

我有两个 C# 类，它们具有许多相同的属性(按名称和类型)。我希望能够从 Defect 的实例中复制所有非空值进入 DefectViewModel 的实例.我希望通过反射来做到这一点，使用 GetType().GetProperties() .我尝试了以下方法:

var defect = new Defect();
var defectViewModel = new DefectViewModel();

PropertyInfo[] defectProperties = defect.GetType().GetProperties();
IEnumerable<string> viewModelPropertyNames =
    defectViewModel.GetType().GetProperties().Select(property => property.Name);

IEnumerable<PropertyInfo> propertiesToCopy =
    defectProperties.Where(defectProperty =>
        viewModelPropertyNames.Contains(defectProperty.Name)
    );

foreach (PropertyInfo defectProperty in propertiesToCopy)
{
    var defectValue = defectProperty.GetValue(defect, null) as string;
    if (null == defectValue)
    {
        continue;
    }
    // "System.Reflection.TargetException: Object does not match target type":
    defectProperty.SetValue(viewModel, defectValue, null);
}

执行此操作的最佳方法是什么？我应该维护 Defect 的单独列表吗？属性和 DefectViewModel属性，以便我可以做 viewModelProperty.SetValue(viewModel, defectValue, null) ？

编辑:感谢Jordão's和 Dave's答案，我选择了AutoMapper。 DefectViewModel在 WPF 应用程序中，所以我添加了以下 App构造函数:

public App()
{
    Mapper.CreateMap<Defect, DefectViewModel>()
        .ForMember("PropertyOnlyInViewModel", options => options.Ignore())
        .ForMember("AnotherPropertyOnlyInViewModel", options => options.Ignore())
        .ForAllMembers(memberConfigExpr =>
            memberConfigExpr.Condition(resContext =>
                resContext.SourceType.Equals(typeof(string)) &&
                !resContext.IsSourceValueNull
            )
        );
}

然后，而不是所有PropertyInfo业务，我只有以下行:

var defect = new Defect();
var defectViewModel = new DefectViewModel();
Mapper.Map<Defect, DefectViewModel>(defect, defectViewModel);

Answer 1

看看AutoMapper .