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我正在开发一个应用程序,用于检查单独程序(不是我写的)对文件所做的更改。是否可以读取锁定文件?
如果检测到更改,它会打开文件,读取最后一行,然后关闭文件。
我用下面的代码,以确保我的程序不会尝试锁定文件,但只打开它在读模式:
FileStream fs =
new FileStream(
_scannerFilePath,
FileMode.Open,
FileAccess.Read,
FileShare.ReadWrite);
StreamReader sr = new StreamReader(fs);
var str = sr.ReadToEnd();
sr.Close();
fs.Close();
不幸的是,尽管如此,我每当我的程序尝试读取文件时,仍然会出现以下错误:
System.IO.IOException was unhandled
Message="The process cannot access the file 'D:\\LSDATA\\IdText.txt' because it is being used by another process."
Source="mscorlib"
StackTrace:
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 LiquorSafe.Verification.Main.CheckLastScannedUser(String changedFileName)
at LiquorSafe.Verification.Main.OnChanged(Object sender, FileSystemEventArgs e)
at System.IO.FileSystemWatcher.OnChanged(FileSystemEventArgs e)
at System.IO.FileSystemWatcher.NotifyFileSystemEventArgs(Int32 action, String name)
at System.IO.FileSystemWatcher.CompletionStatusChanged(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* overlappedPointer)
at System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP)
InnerException:
是否有任何可能的原因?
难道是其他程序以某种方式读锁定该文件,从而阻止我甚至读它?