如何将字节数组设置为最大 [英] How to set Byte array to Max

问题描述

我想这样声明一个字节数组

I want to declare a Byte array like this

Dim buffer() As Byte

但是我不知道数组的大小，如何设置最大值呢?
并且我需要设置一些东西，因为它给了我以后需要分配.

But I don''t know the size of the array SO how can I set it to take the max?
and I Need to set something since it give me it need to be assigned later on.

推荐答案

正如Mehdi所说，永远不要将缓冲区分配给最大大小！ /> 在.NET中，任何单个对象的最大大小为2Gb，因此，字节数组的最大大小为2147483648字节.如果您继续分配而不需要实际使用的大量内存，则会非常非常快地降低计算机的爬网速度.
最初，将其定义为

As Mehdi says, never assign a buffer to the maximum size!
In .NET the maximum size of any single object is 2Gb, so the Max size of a bytes array is 2147483648 bytes. If you keep on allocating this much memory without actually needing it, you will slow your computer to a crawl very, very quickly...
Initially, define it as

Dim buffer() As Byte = nothing

，然后在知道需要多少字节后重新分配它.

And then re-assign it when you know how many bytes you need.

似乎您不知道创建数组时的大小.也就是说，您不应该使用数组.而是，使用通用类System.Collections.Generic.List，请参见 http://msdn.microsoft.com/zh-CN /library/6sh2ey19.aspx [ ^ ].是的，您也可以使用数组，但是重新分配并不是一件好事.由于性能和其他原因，无法证明使用数组而不是列表.

—SA

It looks like you don''t know the array size at the moment of its creation. That said, you should not use array. Instead, use the generic class System.Collections.Generic.List, see http://msdn.microsoft.com/en-us/library/6sh2ey19.aspx[^]. Yes, you can use array, too, but reallocation is not a very good thing. Due to performance and other reason, using array and not list cannot be justified.

—SA

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