c# - System.IO.Exception 错误 : "The requested operation cannot be performed on a file with a user-mapped section open."

Question

我在写入 XML 文件时收到一个非常奇怪的 IOException:

System.IO.IOException: The requested operation cannot be performed on a file with a user-mapped section open.

   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy)
   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
   at System.Xml.XmlTextWriter..ctor(String filename, Encoding encoding)
   at System.Xml.XmlDocument.Save(String filename)

错误发生在我调用XmlDocument的Save(string)函数时。

对发生的事情有什么想法吗？

Answer 1

看起来另一个进程使用文件映射(共享内存)API 打开了文件。

Process Explorer 中的查找功能应该可以告诉您。