使用不同参数类型的相同方法? [英] Same method that takes a different parameter type?

问题描述

我知道有非常相似的问题，但是我不确定它们中的任何一个正是我所需要的.我有2种方法做完全相同的事情(因此我不需要重写或做任何事情)，唯一的区别是参数和返回类型.

I know there are very similar questions but im not sure that any of them are exactly what i need. I have 2 methods that do exactly the same thing (so i dont need to override or anything) the only difference is the parameter and return types.

public List<List<TestResult>> BatchResultsList(List<TestResult> objectList)
    {

    }

public List<List<ResultLinks>> BatchResultsList(List<ResultLinks> objectList)
    {

    }

是否有一种整齐的方法可以完成此过程，而无需重复代码(类型在方法内部使用).

is there a neat way of doing this that doesnt involve duplciate code (the types are used inside the method).

推荐答案

public List<List<T>> BatchResultsList<T>(List<T> objectList)
{
    foreach(T t in objectList)
    {
        // do something with T.
        // note that since the type of T isn't constrained, the compiler can't 
        // tell what properties and methods it has, so you can't do much with it
        // except add it to a collection or compare it to another object.
    }
}

，如果您需要限制T的类型，以便仅处理特定种类的对象，则使TestResult和ResultLinks都实现一个接口，例如IResult.然后:

and if you need to limit the type of T so that you'll only process specific sorts of objects, make both TestResult and ResultLinks implement an interface, say, IResult. Then:

public interface IResult 
{
    void DoSomething();
}

public class TestResult : IResult { ... }

public class ResultLinks : IResult { ... }

public List<List<T>> BatchResultsList<T>(List<T> objectList) where T : IResult
{
    foreach(T t in objectList)
    {
        t.DoSomething();
        // do something with T.
        // note that since the type of T is constrained to types that implement 
        // IResult, you can access all properties and methods defined in IResult 
        // on the object t here
    }
}

调用该方法时，由于可以推断出类型参数，因此当然可以省略它:

When you call the method, you can of course omit the type parameter, since it can be inferred:

List<TestResult> objectList = new List<TestResult>();
List<List<TestResult>> list = BatchResultsList(objectList);

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