IEnumerable<Stream> 到一个大流或 MemoryStream

Question

我有 IEnumerable 流。我如何将其转换为一个大的 MemoryStream 或 byte[]。我想要将所有 Stream inside 流附加到一个大 Stream/MemoryStream 中。通过遍历所有流，我们遇到了某些性能问题。我正在寻找最佳解决方案。

                    using (var ms = new MemoryStream())
                        {
                            foreach (var stream in streams)
                            {
                                stream.CopyTo(ms);
                            }
                            byteData = ms.ToArray();
                        }

谢谢

Answer 1

只需调用stream.CopyTo

Copying begins at the current position in the current stream, and does not reset the position of the destination stream after the copy operation is complete.

var list = new List<Stream>()
{
   new MemoryStream(new byte[] {1, 2, 3, 4}),
   new MemoryStream(new byte[] {5, 6, 7, 8}),
   new MemoryStream(new byte[] {9, 10, 11, 12})
};

var result = new MemoryStream();

foreach (var stream in list)
   stream.CopyTo(result);

var array =result.ToArray();

Console.WriteLine(string.Join(", ", array));

输出

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12

Answer 2

您可以使用 VirtualStream 的 IEnumerable 代替 MemoryStream 或 FileStream https://searchcode.com/codesearch/view/14192551/

基本上，当大小超过配置的阈值时，它会自动创建 FileStream。这些文件将在处理后被删除

IEnumerable<Stream> 到一个大流或 MemoryStream

IEnumerable<Stream> to One big Stream or MemoryStream

c#

memorystream