在发送到Base构造函数之前修改参数值? [英] Modifying parameter values before sending to Base constructor?
问题描述
我意识到我不能调用一个派生的构造函数在调用一个基础构造函数之前,但是我可以在将它们传递给基础之前修改/创建参数值?
例如,
public enum InputType
{
Number = 1,
String = 2,
Date = 3
}
public class BaseClass
{
public BaseClass(InputType t)
{
//逻辑
}
}
public class DerivedClass:BaseClass
{
public DerivedClass(int i)
:base(value)
//我可以做一些事来推断值应该在这里?
{
// Logic
}
}
如果我有一个派生类,可以推断基础构造函数所需的值(在这个例子中,InputType.Number将对int有效),有一种方法来修改和/或创建传递给基础的值
感谢信息!
$ b
我希望你可以在基类构造函数的参数列表中调用静态方法。
public class DerivedClass:BaseClass
{
public DerivedClass(int i)
:base(ChooseInputType(i))
{
private static InputType ChooseInputType(int i)
{
//逻辑
return InputType.Number;
}
}
The title may be a bit ambiguous, but I couldn't think of a better way to word this.
I realize that I can not call a derived constructor prior to calling a base constructor, but can I somehow modify / create parameters values prior to passing them to the base?
For example,
public enum InputType
{
Number = 1,
String = 2,
Date = 3
}
public class BaseClass
{
public BaseClass(InputType t)
{
// Logic
}
}
public class DerivedClass : BaseClass
{
public DerivedClass(int i)
: base(value)
// Can I do something to infer what value should be here?
{
// Logic
}
}
If I have a derived class that can infer the value required for the base constructor (in this example, InputType.Number would be valid for an int,) is there a way to modify and / or create values that are passed to the base constructor prior to the derived constructor executing?
Thanks for the info!
Ian
I expect you could call static methods in the parameter list of the base class constructor.
public class DerivedClass : BaseClass
{
public DerivedClass(int i)
: base(ChooseInputType(i))
{
}
private static InputType ChooseInputType(int i)
{
// Logic
return InputType.Number;
}
}
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