FooService.cs :
public interface IFooService
{
int Foo();
}
[Export("Foo1", typeof(IFooService))]
public class Foo1 : IFooService
{
public int Foo() { return 1; }
}
[Export("Foo2", typeof(IFooService))]
public class Foo2 : IFooService
{
public int Foo() { return 2; }
}
FooViewModel.cs :
public class FooViewModel : NotificationObject
{
[ImportMany(typeof(IFooService))]
public IEnumerable<IFooService> FooServices { get; private set; }
[Import("Foo1")]
public IFooService FirstFoo { get; private set; }
}
<小时/> 单个导入有效,因为我有一个命名合同,但多重导入没有。如果我更改导出属性并删除指定的合同,则多重导入有效,但单个导入不起作用。我怎样才能让两者同时工作?
答案 0 :(得分:3)
您可以在类上添加多个导出属性:
[Export(typeof(IFooService))]
[Export("Foo1", typeof(IFooService))]
public class Foo1 : IFooService
{
public int Foo() { return 1; }
}
[Export(typeof(IFooService))]
[Export("Foo2", typeof(IFooService))]
public class Foo2 : IFooService
{
public int Foo() { return 2; }
}