c# - 锁定文件 block

Question

我有一个 192k 大小的文件，我想锁定文件的中间部分。

Ex) 我想用 C# 锁定文件的 64k-128k。知道如何锁定文件的那部分吗？

Answer 1

您需要使用 LockFileEx

Locks the specified file for exclusive access by the calling process. This function can operate either synchronously or asynchronously and can request either an exclusive or a shared lock.

您正在寻找共享锁。

[DllImport("kernel32.dll")]
static extern bool LockFileEx(IntPtr hFile, uint dwFlags, uint dwReserved,
   uint nNumberOfBytesToLockLow, uint nNumberOfBytesToLockHigh,
   [In] ref System.Threading.NativeOverlapped lpOverlapped);