最后,我想在调用超类方法之后调用子类方法。我有一个像这样的代码:
Select (CASE WHEN len(item) <= 36 THEN item
ELSE LEFT(item, LEN(item)-36)
END)
from dbo.fnsplit(@manager, ',')
我想做这样的事情:
public class SuperClass
{
protected WrapperClass<T> GetWrapperClass<T>()
{
return new WrapperClass(someStuff).Wrap<T>();
}
public SuperClass CommonMethod1()
{
// Do something
return this;
}
public SuperClass CommonMethod2()
{
// Do something else
return this;
}
// Many CommonMethods
}
public class SubClass : SuperClass
{
public WrapperClass<SomeClass> OptionalLastMethod1()
{
return base.GetWrapperClass<SomeClass>();
}
public WrapperClass<SomeOtherClass> OptionalLastMethod2()
{
return base.GetWrapperClass<SomeOtherClass>();
}
}
我想避免像这样将SuperClass转换为SubClass:
new SubClass()
.CommonMethod1()
.CommonMethod2() // Returns SuperClass
.OptionalLastMethod1(); // I would like to do something like this.
这里的重点是易用性,不易实现。任何意见都表示赞赏。
答案 0 :(得分:0)
通过这样做解决了这个问题。 - 删除了一些不相关的代码。
public class SuperClass<S> where S : SuperClass<S>
{
public S CommonMethod1()
{
// Do something
return (S) this;
}
public S CommonMethod2()
{
// Do something else
return (S) this;
}
// Many CommonMethods
}
public class SubClass : SuperClass<SubClass>
{
public WrapperClass<SomeClass> OptionalLastMethod1()
{
return base.GetWrapperClass<SomeClass>();
}
public WrapperClass<SomeOtherClass> OptionalLastMethod2()
{
return base.GetWrapperClass<SomeOtherClass>();
}
}