我希望能够使用Type的键和Func< T>的值来实现字典.其中T是与键相同类型的对象:
Dictionary<Type,Func<T>> TypeDictionary = new Dictionary<Type,Func<T>>( ) /*Func<T> returns an object of the same type as the Key*/ TypeDictionary.Add( typeof( int ),( ) => 5 ); TypeDictionary.Add( typeof( string ),( ) => "Foo" );
因此,基本上,字典将填充有引用Func< T>的类型.哪会返回该值:
int Bar = TypeDictionary[ typeof( int ) ]( ); string Baz = TypeDictionary[ typeof( string ) ]( );
我该如何实施和执行此操作?
解决方法
这差不多就像你要得到的那样:
void Main() { var myDict = new MyWrappedDictionary(); myDict.Add(() => "Rob"); var func = myDict.Get<string>(); Console.WriteLine(func()); } public class MyWrappedDictionary { private Dictionary<Type,object> innerDictionary = new Dictionary<Type,object>(); public void Add<T>(Func<T> func) { innerDictionary.Add(typeof(T),func); } public Func<T> Get<T>() { return innerDictionary[typeof(T)] as Func<T>; } }