[英]How to configure Automapper to automatically ignore properties with ReadOnly attribute?
Let's say I have the following "destination" class: 假设我有以下“目的地”类:
public class Destination
{
public String WritableProperty { get; set; }
public String ReadOnlyProperty { get; set; }
}
and a "source" class with the ReadOnly
attribute on one of it's properties: 和一个“源”类,其中一个属性具有
ReadOnly
属性:
public class Source
{
public String WritableProperty { get; set; }
[ReadOnly(true)]
public String ReadOnlyProperty { get; set; }
}
It's obvious, but to be clear: I am going to map from Source
class to Destination
class in the following way: 很明显,但要明确:我将通过以下方式从
Source
类映射到Destination
类:
Mapper.Map(source, destination);
What are the ways to configure Automapper to automatically ignore property with ReadOnly(true)
attribute? 有哪些方法可以将Automapper配置为使用
ReadOnly(true)
属性自动忽略属性?
I use Automapper's Profile
classes for configuration. 我使用Automapper的
Profile
类进行配置。 I don't want to dirty up classes with Automapper-specific attributes. 我不想弄脏具有Automapper特定属性的类。 I don't want to configure Automapper for every single read-only property and cause a lot of duplication by this way.
我不想为每个只读属性配置Automapper,并且通过这种方式导致大量重复。
IgnoreMap
to the property: IgnoreMap
添加到属性: [ReadOnly(true)]
[IgnoreMap]
public String ReadOnlyProperty { get; set; }
I don't want to dirty up classes with automapper-specific attributes and make it dependent from it. 我不想使用特定于自动化程序的属性来弄脏类并使其依赖于它。 Also I don't want to add additional attribute along with
ReadOnly
attribute. 另外,我不想添加其他属性以及
ReadOnly
属性。
CreateMap<Source, Destination>()
.ForSourceMember(src => src.ReadOnlyProperty, opt => opt.Ignore())
It is not a way because it forces me to do that for every single property everywhere and also causes a lot of duplication. 这不是一种方式,因为它迫使我为每个地方的每一处房产做这件事,也造成很多重复。
Write Extension Method as shown below: 写扩展方法如下所示:
public static class IgnoreReadOnlyExtensions
{
public static IMappingExpression<TSource, TDestination> IgnoreReadOnly<TSource, TDestination>(
this IMappingExpression<TSource, TDestination> expression)
{
var sourceType = typeof(TSource);
foreach (var property in sourceType.GetProperties())
{
PropertyDescriptor descriptor = TypeDescriptor.GetProperties(sourceType)[property.Name];
ReadOnlyAttribute attribute = (ReadOnlyAttribute) descriptor.Attributes[typeof(ReadOnlyAttribute)];
if(attribute.IsReadOnly == true)
expression.ForMember(property.Name, opt => opt.Ignore());
}
return expression;
}
}
To call extension method: 要调用扩展方法:
Mapper.CreateMap<ViewModel, DomainModel>().IgnoreReadOnly();
Now you could also use ForAllPropertyMaps
to disable it globally: 现在您还可以使用
ForAllPropertyMaps
全局禁用它:
configure.ForAllPropertyMaps(map =>
map.SourceMember.GetCustomAttributes().OfType<ReadOnlyAttribute>().Any(x => x.IsReadOnly),
(map, configuration) =>
{
configuration.Ignore();
});
If you wanted to only map properties that have a certain attribute, in my case the [DataMember] attribute, I wrote a method based on the excellent reply above to handle this for both the source and destination: 如果你只想映射具有特定属性的属性,在我的情况下是[DataMember]属性,我写了一个基于上面的优秀回复的方法来处理源和目标:
public static class ClaimMappingExtensions
{
public static IMappingExpression<TSource, TDestination> IgnoreAllButMembersWithDataMemberAttribute<TSource, TDestination>(
this IMappingExpression<TSource, TDestination> expression)
{
var sourceType = typeof(TSource);
var destinationType = typeof(TDestination);
foreach (var property in sourceType.GetProperties())
{
var descriptor = TypeDescriptor.GetProperties(sourceType)[property.Name];
var hasDataMemberAttribute = descriptor.Attributes.OfType<DataMemberAttribute>().Any();
if (!hasDataMemberAttribute)
expression.ForSourceMember(property.Name, opt => opt.Ignore());
}
foreach (var property in destinationType.GetProperties())
{
var descriptor = TypeDescriptor.GetProperties(destinationType)[property.Name];
var hasDataMemberAttribute = descriptor.Attributes.OfType<DataMemberAttribute>().Any();
if (!hasDataMemberAttribute)
expression.ForMember(property.Name, opt => opt.Ignore());
}
return expression;
}
}
It will be called as the other method did: 它将被调用为另一种方法:
Mapper.CreateMap<ViewModel,DomainModel>().IgnoreAllButMembersWithDataMemberAttribute();
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