像写入文件一样写入流，但实际上写入对象

发布于 2024-12-02 18:07:26 字数 316 浏览 0 评论 0原文

我正在尝试将流写入内存而不是文件。我尝试这样做：

Stream stream = new MemoryStream();
BinaryFormatter bFormatter = new BinaryFormatter();
bFormatter.Serialize(stream, objectToSerialize);
stream.Close();
return stream;

但是当我在应该写入流后查看流时，它说“Length ='stream.Length'抛出了'System.ObjectDisposeException'类型的异常”

原文

I am trying write a stream to the ram instead of a file. I tried doing this:

Stream stream = new MemoryStream();
BinaryFormatter bFormatter = new BinaryFormatter();
bFormatter.Serialize(stream, objectToSerialize);
stream.Close();
return stream;

But when I look at the stream after I have supposedly written to it it is saying "Length = 'stream.Length' threw an exception of type 'System.ObjectDisposedException'"

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往日 2024-12-09 18:07:26

在获取数据之前不要关闭流，并且不返回流而是返回流的内容：

using (Stream stream = new MemoryStream()) {
  BinaryFormatter bFormatter = new BinaryFormatter();
  bFormatter.Serialize(stream, objectToSerialize);
  return stream.ToArray();
}

Don't close the stream before getting the data, and don't return the stream but the content of the stream:

using (Stream stream = new MemoryStream()) {
  BinaryFormatter bFormatter = new BinaryFormatter();
  bFormatter.Serialize(stream, objectToSerialize);
  return stream.ToArray();
}

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橘和柠 2024-12-09 18:07:26

您正在调用 stream.Close()，这与在流上调用 Dispose() 完全相同。

只要删除那行代码就可以了。基本上，您需要在返回时将 MemoryStream 保持打开状态。

另一方面，根据您要执行的操作，您可能还需要重置流的位置。我怀疑您会想要：

Stream stream = new MemoryStream();
BinaryFormatter bFormatter = new BinaryFormatter();
bFormatter.Serialize(stream, objectToSerialize);
stream.Position = 0;
return stream;

这与您的代码相同，但不会 Dispose() 流（因为它不再调用 stream.Close()），并将其重置到起始位置，如果您想读回对象/数据，这通常是必需的。

You're calling stream.Close(), which is exactly the same as calling Dispose() on the stream.

Just remove that line of code, and you should be fine. Basically, you need to leave the MemoryStream open when it's returned.

On a different note, depending on what you're going to do, you may also want to reset the stream's position. I suspect you'll want:

Stream stream = new MemoryStream();
BinaryFormatter bFormatter = new BinaryFormatter();
bFormatter.Serialize(stream, objectToSerialize);
stream.Position = 0;
return stream;

This works the same as your code, but does not Dispose() the stream (since it's no longer calling stream.Close()), and also resets it to the start position, which is often required if you want to read the object/data back out.

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