的FileStream读取/写入方法的局限性 [英] FileStream Read/Write method's limitation

问题描述

的FileStream的读取/写入方法只能取整数值长度。在但的FileStream 对象返回长度长。在这种情况下，如果文件大小是比整数值（大约超过2GB）大。那么怎样的FileStream的读取/写入方法句柄长值。

FileStream's read/write method can take only integer value as length. But FileStreamobject returns length in long. In this case, what if file size is larger than integer value (approximate more than 2GB). Then how FileStream's read/write method handle long value.

推荐答案

然后你看，多写大块英寸在CLR对任何特定的对象的大小有限制呢（也2GB左右IIRC，即使是在64位CLR），所以你不能有一个字节数组足够大，它是一个问题。

Then you read and write in multiple chunks. The CLR has a limit on the size of any particular object anyway (also around 2GB IIRC, even on a 64-bit CLR), so you couldn't have a byte array big enough for it to be a problem.

您应该始终循环读取反正时候，因为你不能保证一个读通话将读取的字节数，你的要求，即使有更多的数据来。

You should always loop when reading anyway, as you can't guarantee that a Read call will read as many bytes as you requested, even if there's more data to come.

编辑：读取中块：

byte[] buffer = new byte[1024 * 32];
int bytesRead;

while ((bytesRead = stream.Read(buffer, 0, buffer.Length)) > 0)
{
    // Use the data you've read
}

在块将取决于你写什么

写作......很难讲关于它的抽象。

Writing in chunks will depend on what you're writing... it's hard to talk about it in the abstract.

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