合同要求某种共享方法 [英] Contract to require a certain shared method

问题描述

我试图编写一个接口，需要实现

类才能有一个共享函数，CanAdd（）作为boolean，它决定当前用户是否b / b
可以添加特定类的新实例。这个

授权是在类级别，而不是实例级别，所以它应该共享
，但我找不到一种方法来要求一个类来

通过接口实现共享方法。有什么建议吗？

I was trying to write an interface that would require the implementing
class to have a shared function, CanAdd() as boolean, which decides if
the current user can add a new instance of the particular class. This
authorization is at the class level, not the instance level, so it
should be shared, but I cannot find a way to require a class to
implement a shared method via an interface. Any suggestions?

推荐答案

布莱恩，


Luckely你可以在VB中用AFAIK创建混合模式类（一些需要一个

构造函数，一些不允许构造函数）。


Legency这是C语言。


Cor

" Bryan" < br ******* @ bermail.com的gmail.comschreef

新闻：11 ********************** @ e65g2000hsc.googlegr oups.com ...

Bryan,

Luckely you can AFAIK in VB not create mixed mode classes (some which need a
constructor and some which don''t allow a constructer).

Legency this is in the C languages.

Cor
"Bryan" <br*******@gmail.comschreef in bericht
news:11**********************@e65g2000hsc.googlegr oups.com...

>我试图编写一个需要实现

类的接口一个共享函数，CanAdd（）作为布尔值，它决定当前用户是否可以添加特定类的新实例。这个

授权是在类级别，而不是实例级别，所以它应该共享
，但我找不到一种方法来要求一个类来

通过接口实现共享方法。有什么建议吗？

>I was trying to write an interface that would require the implementing
class to have a shared function, CanAdd() as boolean, which decides if
the current user can add a new instance of the particular class. This
authorization is at the class level, not the instance level, so it
should be shared, but I cannot find a way to require a class to
implement a shared method via an interface. Any suggestions?

" Cor Ligthert [MVP]" < no ************ @ planet.nlschrieb：

"Cor Ligthert [MVP]" <no************@planet.nlschrieb:

Luckely你可以在VB中使用AFAIK而不是创建混合模式类（其中一些是需要

a构造函数和一些不允许构造函数的构造函数。

Luckely you can AFAIK in VB not create mixed mode classes (some which need
a constructor and some which don''t allow a constructer).

与OP'问题的关系是什么？

What''s the relation to the OP''s question?

Legency this in in C语言。

Legency this is in the C languages.

至少不在C中，因为C根本不支持课程。


-

MS Herfried K. Wagner

MVP< URL：http：//dotnet.mvps.org/>

VB< URL：http：/ /dotnet.mvps.org/dotnet/faqs/>

At least not in C because C doesn''t support classes at all.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

" Bryan" < br ******* @ gmail.comschrieb：

"Bryan" <br*******@gmail.comschrieb:

>我试图编写一个需要实现的界面

类有一个共享函数，CanAdd（）为boolean，它决定当前用户是否可以添加特定类的新实例。这个

授权是在类级别，而不是实例级别，所以它应该共享
，但我找不到一种方法来要求一个类来

通过接口实现共享方法。有什么建议？

>I was trying to write an interface that would require the implementing
class to have a shared function, CanAdd() as boolean, which decides if
the current user can add a new instance of the particular class. This
authorization is at the class level, not the instance level, so it
should be shared, but I cannot find a way to require a class to
implement a shared method via an interface. Any suggestions?

这在VB中是不可能的（在C＃中也是如此）。但是，为什么不定义包含该方法的

基类？但请注意，

根本无法覆盖共享方法。


-

MS Herfried K .Wagner

MVP< URL：http：//dotnet.mvps.org/>

VB< URL：http：//dotnet.mvps.org/ dotnet / faqs />

That''s simply not possible in VB (and in C# too). However, why not define a
base class containing the method? However, note that it''s not possible to
override shared methods at all.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

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