Question

当我上传超过500 MB 的文件时, 我就会跟踪错误

"除类型系统外,还抛出除去记忆外的例外。 "

我的代码显示如下:

public readonly string Filename, ContentType;
public readonly int Size;
public readonly byte[] Bytes;

public FileHolder(HttpPostedFile file)
{
            Filename = Path.GetFileName(file.FileName);
            ContentType = GetContentType(file.ContentType, Filename);
            Size = file.ContentLength;
            Bytes = new byte[file.InputStream.Length];          //Here i get error
            file.InputStream.Read(Bytes, 0, Size);
}

Answer 1

不要试图同时读取整个溪流。反正你也不会同时读取整个溪流。

创建具有合理大小的缓冲, 然后一次读取块 :

byte[] buffer = new byte[8192];
int offset = 0;
int left = Size;
while (left > 0) {
  int len = file.InputStream.Read(buffer, 0, Math.Min(buffer.Length, left));
  left -= len;
  // here you should store the first "len" bytes of the buffer
  offset += len;
}

Answer 2

您不应该将整个文件装入字节数组。相反, 您可以直接从输入流中处理文件。

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