[英]Copying Files Recursively
我在 C# 中找到了一個用於執行遞歸文件復制的小片段,但有點難過。 我基本上需要將目錄結構復制到另一個位置,沿着這個......
來源:C:\data\servers\mc
目標:E:\mc
截至目前,我的副本 function 的代碼是......
//Now Create all of the directories
foreach (string dirPath in Directory.GetDirectories(baseDir, "*", SearchOption.AllDirectories))
{
Directory.CreateDirectory(dirPath.Replace(baseDir, targetDir));
}
// Copy each file into it’s new directory.
foreach (string file in Directory.GetFiles(baseDir, "*.*", SearchOption.AllDirectories))
{
Console.WriteLine(@"Copying {0}\{1}", targetDir, Path.GetFileName(file));
if (!CopyFile(file, Path.Combine(targetDir, Path.GetFileName(file)), false))
{
int err = Marshal.GetLastWin32Error();
Console.WriteLine("[ERROR] CopyFile Failed on {0} with code {1}", file, err);
}
}
問題是在第二個 scope 中,我要么:
Path.GetFileName(file)
獲取沒有路徑的實際文件名,但我丟失了目錄“mc”目錄結構或無論哪種方式,我都必須做一些討厭的字符串工作。 在 C# 中是否有一種好方法可以做到這一點(我對 .NET API 缺乏了解讓我把事情復雜化了)
MSDN 有一個完整的示例:如何:復制目錄
using System;
using System.IO;
class DirectoryCopyExample
{
static void Main()
{
// Copy from the current directory, include subdirectories.
DirectoryCopy(".", @".\temp", true);
}
private static void DirectoryCopy(string sourceDirName, string destDirName,
bool copySubDirs)
{
// Get the subdirectories for the specified directory.
DirectoryInfo dir = new DirectoryInfo(sourceDirName);
if (!dir.Exists)
{
throw new DirectoryNotFoundException(
"Source directory does not exist or could not be found: "
+ sourceDirName);
}
DirectoryInfo[] dirs = dir.GetDirectories();
// If the destination directory doesn't exist, create it.
if (!Directory.Exists(destDirName))
{
Directory.CreateDirectory(destDirName);
}
// Get the files in the directory and copy them to the new location.
FileInfo[] files = dir.GetFiles();
foreach (FileInfo file in files)
{
string temppath = Path.Combine(destDirName, file.Name);
file.CopyTo(temppath, false);
}
// If copying subdirectories, copy them and their contents to new location.
if (copySubDirs)
{
foreach (DirectoryInfo subdir in dirs)
{
string temppath = Path.Combine(destDirName, subdir.Name);
DirectoryCopy(subdir.FullName, temppath, copySubDirs);
}
}
}
}
這個答案的非遞歸替換是:
private static void DirectoryCopy(string sourceBasePath, string destinationBasePath, bool recursive = true)
{
if (!Directory.Exists(sourceBasePath))
throw new DirectoryNotFoundException($"Directory '{sourceBasePath}' not found");
var directoriesToProcess = new Queue<(string sourcePath, string destinationPath)>();
directoriesToProcess.Enqueue((sourcePath: sourceBasePath, destinationPath: destinationBasePath));
while (directoriesToProcess.Any())
{
(string sourcePath, string destinationPath) = directoriesToProcess.Dequeue();
if (!Directory.Exists(destinationPath))
Directory.CreateDirectory(destinationPath);
var sourceDirectoryInfo = new DirectoryInfo(sourcePath);
foreach (FileInfo sourceFileInfo in sourceDirectoryInfo.EnumerateFiles())
sourceFileInfo.CopyTo(Path.Combine(destinationPath, sourceFileInfo.Name), true);
if (!recursive)
continue;
foreach (DirectoryInfo sourceSubDirectoryInfo in sourceDirectoryInfo.EnumerateDirectories())
directoriesToProcess.Enqueue((
sourcePath: sourceSubDirectoryInfo.FullName,
destinationPath: Path.Combine(destinationPath, sourceSubDirectoryInfo.Name)));
}
}
代替
foreach (string file in Directory.GetFiles(baseDir, "*.*", SearchOption.AllDirectories))
{
做這樣的事情
foreach (FileInfo fi in source.GetFiles())
{
fi.CopyTo(Path.Combine(target.ToString(), fi.Name), true);
}
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