What is the difference between Array.Clone and Array.Copy Method

最新推荐文章于 2021-03-08 18:12:31 发布

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最新推荐文章于 2021-03-08 18:12:31 发布

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原文链接：http://www.cnblogs.com/Jessy/archive/2010/10/25/1860603.html

本文详细介绍了.NET中数组的浅拷贝与深拷贝的区别，以及数组复制的方法。浅拷贝仅复制数组元素，而不复制引用指向的对象；深拷贝则会递归地复制所有对象。文章还提供了多种数组复制的方式，包括使用不同长度类型指定范围的复制。

Array.Clone Method:

1).Creates a shallow copy of the Array.

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2). Remarks

A shallow copy of an Array copies only the elements of the Array, whether they are reference types or value types, but it does not copy the objects that the references refer to. The references in the new Array point to the same objects that the references in the original Array point to.

In contrast, a deep copy of an Array copies the elements and everything directly or indirectly referenced by the elements.

The clone is of the same Type as the original Array.

This method is an O(n) operation, where n is Length.

---------------------------------------------------------------------------------------------------------------------------------Array.Copy Method

1 ). Copies a range of elements in one Array to another Array and performs type casting and boxing as required.

2). This member is overloaded. For complete information about this member, including syntax, usage, and examples, click a name in the overload list.

Overload List

	Name	Description
	Copy(Array, Array, Int32)	Copies a range of elements from an Array starting at the first element and pastes them into another Array starting at the first element. The length is specified as a 32-bit integer.
	Copy(Array, Array, Int64)	Copies a range of elements from an Array starting at the first element and pastes them into another Array starting at the first element. The length is specified as a 64-bit integer.
	Copy(Array, Int32, Array, Int32, Int32)	Copies a range of elements from an Array starting at the specified source index and pastes them to another Array starting at the specified destination index. The length and the indexes are specified as 32-bit integers.
	Copy(Array, Int64, Array, Int64, Int64)	Copies a range of elements from an Array starting at the specified source index and pastes them to another Array starting at the specified destination index. The length and the indexes are specified as 64-bit integers.