interface

问题 Referencing to my previous question, the story begins in that fact that I have a bunch of svcutil-generated classes. They are generated from external WSDL. Here you go: First request class: public partial class getcarsRequest { [System.ServiceModel.MessageHeaderAttribute(Namespace = "http://svc.datadomains.com/revision123_2/")] public CarsServiceApp.RequestHeader Header; [System.ServiceModel.MessageBodyMemberAttribute(Name = "getcarsRequest", Namespace = "carinfo", Order = 0)] public

问题 I should start by saying that I am very much a noobie with interfaces so this might be a really dumb question. Also apologies if my Title is unclear - matches the state of my mind! I do understand the principles behind interfaces and I am want to use them here both to support unit testing and also decoupling via a DI Framework in what is horribly messy and un-testable legacy code. I have an inteface called IDatHandler. It has a List<> property called Items. The concrete implementations should

问题 from a url i saw people can instantiate interface like this way class Program { static void Main(string[] args) { var foo = new IFoo(1); foo.Do(); } } [ ComImport, Guid("C906C002-B214-40d7-8941-F223868B39A5"), CoClass(typeof(FooImpl)) ] public interface IFoo { void Do(); } public class FooImpl : IFoo { private readonly int i; public FooImpl(int i) { this.i = i; } public void Do() { Console.WriteLine(i); } } how it is possible to write like this var foo = new IFoo(1); looking for guidance.

问题 I'm 13 and quite new to java. What I can't seem to figure out is how NOT to implement overriding methods in a class from an interface because they are references. I don't want to make a new copy, and I can't just make (insert Class here) extend (the class the interface gets some of its methods from). So I implement it and what do i get? err: The type Threadmanager must implement the inherited abstract method (the method) and then it has a list, one of which says "implement uninherited methods

问题 With VB's Option Strict On , why does a Nullable(Of T) not require an explicit cast to an interface of T when it does require one to T ? I.e. Dim x As Integer? = 5 Dim y As Integer Dim z As IComparable y = x ' Fails to compile with error ' "Option Strict On disallows implicit conversions from 'Integer?' to 'Integer'." z = x ' Succeeds EDIT: As (sort of) shown by @SSS, part of the answer is that Nullable values are, well, nullable, and can be Nothing , which is fine for a reference like an

问题 i am using custom role provider for that i made a CustomRoleProvider class and implemented some RoleProvider methods in it, like this public class CustomRoleProvider: RoleProvider { public override void CreateRole(string roleName) { throw new NotImplementedException(); } public override bool DeleteRole(string roleName, bool throwOnPopulatedRole) { throw new NotImplementedException(); } } All the methods are public.but it showing error that Error 4-Inconsistent accessibility: base class

问题 Let I've two interfaces: class foo{ public: virtual void fooo(bar * b)=0; } class bar{ public: virtual void barr(foo * f)=0; } But this code snippet is ill-formed. How can I write this interfaces correctly? 回答1: How can I write this interfaces correctly? You can always forward declare classes and use pointers or references in the code that sees the forward declaration. As soon any code needs to refer class members, the full class declaration must be seen. class bar; // << Note the forward

问题 README I have thousands of creatures, and each creature derives from Creature . An example of a creature is Creature_MoonDancer . Creature is a class that can only be instantiated if a CreatureData object is passed into its constructor. I want to find a way to scope any sealed type that inherits from Creature to one CreatureData in a Dictionary . Each creature may only be linked up to a maximum of 1 instance of CreatureData in creatureDatabaseDictionary. Here is CreatureData , a class with

问题 I have this in java: public interface SomeInterface { public void doSomething(); } public class ParentClass { } public class ChildClass extends ParentClass implements SomeInterface { public void doSomething() { } } Is this possible on objective c? How to do it on objective-c? 回答1: It sounds like you're just asking "How do I declare that a class conforms to a protocol?" If that's what you're asking, Cocoa is full of examples. Here's the declaration of NSString: @interface NSString : NSObject

问题 I have to map the interface as entity to use different implementations in collections. @Entity @Table(name = "OPTION") @Inheritance(strategy = InheritanceType.SINGLE_TABLE) @DiscriminatorColumn(name = "TYPE", discriminatorType = DiscriminatorType.STRING) public interface FilterOption { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) public Long getId(); public void setId(Long id); public Object getValue(); ... } I'm recieving an error : Internal Exception: Exception [EclipseLink-7161]