将属性值从一个实例复制到另一个实例,不同的类
我有两个C#类有许多相同的属性(按名称和类型)。 我希望能够将Defect
实例中的所有非空值复制到DefectViewModel
实例中。 我希望通过使用GetType().GetProperties()
来反射。 我尝试了以下内容:
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);
}
什么是最好的方法来做到这一点? 我应该维护Defect
属性和DefectViewModel
属性的单独列表,以便我可以执行viewModelProperty.SetValue(viewModel, defectValue, null)
?
编辑:由于Jordão和Dave的答案,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,我只是有以下行,而不是所有PropertyInfo
业务:
var defect = new Defect();
var defectViewModel = new DefectViewModel();
Mapper.Map<Defect, DefectViewModel>(defect, defectViewModel);
看看AutoMapper。
有这样的框架,我知道的是Automapper:
http://automapper.codeplex.com/
http://www.lostechies.com/blogs/jimmy_bogard/archive/2009/01/22/automapper-the-object-object-mapper.aspx
用这个替换你的错误行:
PropertyInfo targetProperty = defectViewModel.GetType().GetProperty(defectProperty.Name);
targetProperty.SetValue(viewModel, defectValue, null);
您发布的代码尝试在DefectViewModel
对象上设置Defect
tied属性。
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