[英]Most efficient way to rename an image
Is there a more efficient way to rename a file in Windows other than: 除了以下方法以外,是否有更有效的方法来重命名Windows中的文件:
System.IO.File.Move(sourceFileName, destFileName);
I have millions of them and using the above will take almost a week to run. 我有数百万个,使用上面的代码将花费几乎一周的时间。
File.Move is a thin wrapper around the Win32 API. File.Move是Win32 API的瘦包装。 I doubt there is any faster way short of directly modifying the raw data at the block level on the disk.
我怀疑除了在磁盘的块级别直接修改原始数据之外,还有没有其他更快的方法。 I think you are out of luck looking for a faster way from managed code.
我认为您不希望从托管代码中找到更快的方法。
File.Move decompiled source: File.Move反编译源:
public static void Move(string sourceFileName, string destFileName)
{
if ((sourceFileName == null) || (destFileName == null))
{
throw new ArgumentNullException((sourceFileName == null) ? "sourceFileName" : "destFileName", Environment.GetResourceString("ArgumentNull_FileName"));
}
if ((sourceFileName.Length == 0) || (destFileName.Length == 0))
{
throw new ArgumentException(Environment.GetResourceString("Argument_EmptyFileName"), (sourceFileName.Length == 0) ? "sourceFileName" : "destFileName");
}
string fullPathInternal = Path.GetFullPathInternal(sourceFileName);
new FileIOPermission(FileIOPermissionAccess.Write | FileIOPermissionAccess.Read, new string[] { fullPathInternal }, false, false).Demand();
string dst = Path.GetFullPathInternal(destFileName);
new FileIOPermission(FileIOPermissionAccess.Write, new string[] { dst }, false, false).Demand();
if (!InternalExists(fullPathInternal))
{
__Error.WinIOError(2, fullPathInternal);
}
if (!Win32Native.MoveFile(fullPathInternal, dst))
{
__Error.WinIOError();
}
}
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