C＃ - 为什么你需要实例每个数组元素？ [英] C# - Why do you need to instantiate each array element?

问题描述

我经常使用这种类型的构造。

I use this type of construct often.

response = new LocationResponse ();
response.LocationDetails = new LocationDetail[4];
response.LocationDetails[0] = new LocationDetail();
response.LocationDetails[0].site = "ABCDE";
...

这件作品，我不完全理解为这片：

The piece I don't fully understand is this piece:

response.LocationDetails [0] =新LocationDetail（）;

为什么阵列的每个元素都被实例

Why does each individual element of the array have to be instantiated?

如果你离开它，你得到了一个未定义的例外。

If you leave it out, you get undefined exceptions.

推荐答案

那么，如果一个数组元素被自动实例，你就被锁定在哪些类你定义的数组。你就不能够使用抽象类或接口或不具有一个默认的构造的任何对象的阵列。这仅仅是命名在一个阵列自动实例化对象的几个问题。

Well if an array elements were automatically instantiated, you would be locked into which classes you defined the array with. You wouldn't be able to use arrays of abstract classes or interfaces or any object which doesn't have a default constructor. This is just naming a few problems with automatically instantiating objects in an array.

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