如何添加方法来操纵类对象的数组? [英] How to add methods to manipulate an array of class objects?

问题描述

我不知道该如何措辞，因此，如果这确实没有道理，那么我们感到抱歉，但是应该从这里开始变得有道理...................................................p.............另外，如果解决方案真的非常简单，我也感到抱歉.Google无法理解我的要求(问题可能是因为我问错了:P)

I didnt know how to word the question, so sorry if it doesnt really make sense, but it should start making sense here. Also, I am sorry if the solution is really, really simple. Google couldnt understand what I was asking (probs cause I was asking it wrong :P)

所以我写了一个叫 OrderSelection

在我的程序中，我需要有一个OrderSelection对象数组，并且需要对该数组执行操作(重新排序，排序等).

In my program I need to have an array of OrderSelection objects, and I need to perform actions on this array (re-ordering, sorting etc).

我现在正在做的是将方法保留在OrderSelection类中，这些方法可以接受(例如)您要重新排序的数组.

What I am doing right now is keeping methods in the OrderSelection class that accept, among others, the array which you want to re-order, for example.

类似:

public void reorder(OrderSelection[] ord, int switchX, int switchY){....}

但是我想做的是:

OrderSelection[] order = new OrderSelection[10];
//do stuff
order.reorder(1,2);//which is WAY better than order[0].reorder(order, 1,2) as a horrid example

是的...我该如何添加要应用于类对象数组的这些函数?

So yeah...how can I add these functions which I want to apply to an array of objects of my class?

谢谢！

推荐答案

您正在寻找扩展方法.这是MSDN文档.

编写扩展方法如下:

public static class OrderSelectionExtensionMethods
{
    public static void reorder(this OrderSelection[] orders, int x, int y) 
    {
        // Do something with each order
    }
}

扩展方法通常在完全独立的类中定义.
此外，扩展方法还需要两件事:

Extension methods are usually defined in an entirely separate class.
Also, two things are required for Extension Methods:

• 整个类必须是 static
• 每个扩展方法的第一个参数前面必须带有关键字 this

使用上面的代码，您的示例代码可以正常编译:

With the above code, your example code would compile fine:

OrderSelection[] order = new OrderSelection[10];
//do stuff
order.reorder(1,2);

这与编写以下内容完全相同:

This is the exact same as writing the following:

OrderSelection[] order = new OrderSelection[10];
//do stuff
OrderSelectionExtensionMethods.reorder(order, 1, 2);

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