使用System.IO.Packaging创建大型ZIP文件时出现OutOfMemoryException [英] OutOfMemoryException when creating large ZIP file using System.IO.Packaging

问题描述

我正在尝试调试使用System.IO.Packaging.ZipPackage创建相当大的ZIP文件时出现的OutOfMemoryException.

I am trying to debug an OutOfMemoryException that occurs when creating a fairly large ZIP file using System.IO.Packaging.ZipPackage.

代码正在遍历大量对象，并对每个对象执行以下操作.

The code is iterating through a large list of objects, doing the following for each object.

1. 将对象数据序列化为临时文件.
2. 为文件创建PackagePart.
3. 从源System.IO.Stream复制到另一个:
   • 源流:FileStream
   • 目标流:PackagePart::GetStream() => MS.Internal.IO.Zip.ZipIOModeEnforcingStream

1. Serializing the object data to a temporary file.
2. Creating a PackagePart for the file.
3. Copy from a source System.IO.Stream to another:
   • Source stream: FileStream
   • Target stream: PackagePart::GetStream() => MS.Internal.IO.Zip.ZipIOModeEnforcingStream

最后，它调用Package::Close()保存文件.

Finally it calls Package::Close() which saves the file.

我遇到的问题是，对于一个特别大的对象列表，我看到一个OutOfMemoryException(x86进程的大小已达到约1.2GB).

The problem I am having is that for a particularly large list of objects, I am seeing an OutOfMemoryException (the x86 process size is getting to about 1.2GB in size).

我当时正在考虑将对象数据划分为大块，因此每个循环只处理少量数据(即上述步骤1-3).我的想法是，我将在一个临时目录中创建n ZIP文件，然后找到一种将它们组合到单个存档中的方法.

I was thinking about partitioning the object data into chunks so I only process a smaller amount per loop (i.e. steps 1-3 above). The idea is that I would create n ZIP files in a temporary directory, and then find a way to combine them into a single archive.

使用System.IO.Packaging可以吗?我要用什么来组合这些部分?

Is this possible using System.IO.Packaging? What would I use to combine the parts?

还是有更好的方法来解决此问题?

Or is there a better way to fix this?

推荐答案

在创建新包之间调用Package对象的Flush方法可能会解决该问题，因为这将导致内存缓冲区刷新到磁盘

Calling the Flush method on the Package object in between creating a new package should probably solve the problem as that would cause the memory buffer to be flushed to disk.

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