我想用c#将一个目录的全部内容从一个位置复制到另一个位置。
使用System似乎没有办法做到这一点。没有大量递归的IO类。
如果我们添加对Microsoft的引用,VB中有一个方法可以使用。VisualBasic:
new Microsoft.VisualBasic.Devices.Computer().
FileSystem.CopyDirectory( sourceFolder, outputFolder );
这似乎是一个相当丑陋的黑客。有没有更好的办法?
我想用c#将一个目录的全部内容从一个位置复制到另一个位置。
使用System似乎没有办法做到这一点。没有大量递归的IO类。
如果我们添加对Microsoft的引用,VB中有一个方法可以使用。VisualBasic:
new Microsoft.VisualBasic.Devices.Computer().
FileSystem.CopyDirectory( sourceFolder, outputFolder );
这似乎是一个相当丑陋的黑客。有没有更好的办法?
当前回答
使用这个类。
public static class Extensions
{
public static void CopyTo(this DirectoryInfo source, DirectoryInfo target, bool overwiteFiles = true)
{
if (!source.Exists) return;
if (!target.Exists) target.Create();
Parallel.ForEach(source.GetDirectories(), (sourceChildDirectory) =>
CopyTo(sourceChildDirectory, new DirectoryInfo(Path.Combine(target.FullName, sourceChildDirectory.Name))));
foreach (var sourceFile in source.GetFiles())
sourceFile.CopyTo(Path.Combine(target.FullName, sourceFile.Name), overwiteFiles);
}
public static void CopyTo(this DirectoryInfo source, string target, bool overwiteFiles = true)
{
CopyTo(source, new DirectoryInfo(target), overwiteFiles);
}
}
其他回答
容易得多
private static void CopyFilesRecursively(string sourcePath, string targetPath)
{
//Now Create all of the directories
foreach (string dirPath in Directory.GetDirectories(sourcePath, "*", SearchOption.AllDirectories))
{
Directory.CreateDirectory(dirPath.Replace(sourcePath, targetPath));
}
//Copy all the files & Replaces any files with the same name
foreach (string newPath in Directory.GetFiles(sourcePath, "*.*",SearchOption.AllDirectories))
{
File.Copy(newPath, newPath.Replace(sourcePath, targetPath), true);
}
}
这里有一个简洁而有效的解决方案:
namespace System.IO {
public static class ExtensionMethods {
public static void CopyTo(this DirectoryInfo srcPath, string destPath) {
Directory.CreateDirectory(destPath);
Parallel.ForEach(srcPath.GetDirectories("*", SearchOption.AllDirectories),
srcInfo => Directory.CreateDirectory($"{destPath}{srcInfo.FullName[srcPath.FullName.Length..]}"));
Parallel.ForEach(srcPath.GetFiles("*", SearchOption.AllDirectories),
srcInfo => File.Copy(srcInfo.FullName, $"{destPath}{srcInfo.FullName[srcPath.FullName.Length..]}", true));
});
}
}
}
使用方法:
new DirectoryInfo(sourcePath).CopyTo(destinationPath);
使用这个类。
public static class Extensions
{
public static void CopyTo(this DirectoryInfo source, DirectoryInfo target, bool overwiteFiles = true)
{
if (!source.Exists) return;
if (!target.Exists) target.Create();
Parallel.ForEach(source.GetDirectories(), (sourceChildDirectory) =>
CopyTo(sourceChildDirectory, new DirectoryInfo(Path.Combine(target.FullName, sourceChildDirectory.Name))));
foreach (var sourceFile in source.GetFiles())
sourceFile.CopyTo(Path.Combine(target.FullName, sourceFile.Name), overwiteFiles);
}
public static void CopyTo(this DirectoryInfo source, string target, bool overwiteFiles = true)
{
CopyTo(source, new DirectoryInfo(target), overwiteFiles);
}
}
这个网站总是帮助我很多,现在轮到我用我所知道的帮助其他人了。
我希望我下面的代码对某些人有用。
string source_dir = @"E:\";
string destination_dir = @"C:\";
// substring is to remove destination_dir absolute path (E:\).
// Create subdirectory structure in destination
foreach (string dir in System.IO.Directory.GetDirectories(source_dir, "*", System.IO.SearchOption.AllDirectories))
{
System.IO.Directory.CreateDirectory(System.IO.Path.Combine(destination_dir, dir.Substring(source_dir.Length + 1)));
// Example:
// > C:\sources (and not C:\E:\sources)
}
foreach (string file_name in System.IO.Directory.GetFiles(source_dir, "*", System.IO.SearchOption.AllDirectories))
{
System.IO.File.Copy(file_name, System.IO.Path.Combine(destination_dir, file_name.Substring(source_dir.Length + 1)));
}
只是想加上我的版本。它可以处理目录和文件,如果目标文件存在,则可以覆盖或跳过。
public static void Copy(
string source,
string destination,
string pattern = "*",
bool includeSubFolders = true,
bool overwrite = true,
bool overwriteOnlyIfSourceIsNewer = false)
{
if (File.Exists(source))
{
// Source is a file, copy and leave
CopyFile(source, destination);
return;
}
if (!Directory.Exists(source))
{
throw new DirectoryNotFoundException($"Source directory does not exists: `{source}`");
}
var files = Directory.GetFiles(
source,
pattern,
includeSubFolders ?
SearchOption.AllDirectories :
SearchOption.TopDirectoryOnly);
foreach (var file in files)
{
var newFile = file.Replace(source, destination);
CopyFile(file, newFile, overwrite, overwriteOnlyIfSourceIsNewer);
}
}
private static void CopyFile(
string source,
string destination,
bool overwrite = true,
bool overwriteIfSourceIsNewer = false)
{
if (!overwrite && File.Exists(destination))
{
return;
}
if (overwriteIfSourceIsNewer && File.Exists(destination))
{
var sourceLastModified = File.GetLastWriteTimeUtc(source);
var destinationLastModified = File.GetLastWriteTimeUtc(destination);
if (sourceLastModified <= destinationLastModified)
{
return;
}
CreateDirectory(destination);
File.Copy(source, destination, overwrite);
return;
}
CreateDirectory(destination);
File.Copy(source, destination, overwrite);
}
private static void CreateDirectory(string filePath)
{
var targetDirectory = Path.GetDirectoryName(filePath);
if (targetDirectory != null && !Directory.Exists(targetDirectory))
{
Directory.CreateDirectory(targetDirectory);
}
}