异步复制目录及其内容

本文关键字：复制 异步 | 更新日期: 2023-09-27 18:10:57

我在MSDN上发现了这个解决方案，可以将文件从一个目录复制到另一个目录，但它只从主目录复制，而不是子目录。

我如何修改这个解决方案，使它也会复制所有的文件夹及其内容?

string StartDirectory = @"C:'Users'...";
string EndDirectory = @"C:'Users'....";
 //Creates all of the directories and sub-directories
foreach (string dirPath in Directory.GetDirectories(StartDirectory, "*", SearchOption.AllDirectories))
    Directory.CreateDirectory(dirPath.Replace(StartDirectory, EndDirectory));
foreach (string filename in Directory.EnumerateFiles(StartDirectory))
{
       using (FileStream SourceStream = File.Open(filename, FileMode.Open))
       {
             using (FileStream DestinationStream = File.Create(EndDirectory + filename.Substring(filename.LastIndexOf(''''))))
             {
                  await SourceStream.CopyToAsync(DestinationStream);
              }
        }
}

异步复制目录及其内容

展开第一个循环以包含内部循环，它应该可以工作。您正在使用第一个for循环搜索所有文件夹，但仅枚举顶级文件夹中的文件。您还需要枚举每个子文件夹中的文件。此外，在这种情况下，DirectoryInfo将比Directory更容易使用。

DirectoryInfo StartDirectory = new DirectoryInfo(@"C:'Users'...");
DirectoryInfo EndDirectory = new DirectoryInfo(@"C:'Users'....");
//Creates all of the directories and sub-directories
foreach (DirectoryInfo dirInfo in StartDirectory.GetDirectories("*", SearchOption.AllDirectories))
{
    string dirPath = dirInfo.FullName;
    string outputPath = dirPath.Replace(StartDirectory.FullName, EndDirectory.FullName);
    Directory.CreateDirectory(outputPath);
    foreach (FileInfo file in dirInfo.EnumerateFiles())
    {
        using (FileStream SourceStream = file.OpenRead())
        {
            using (FileStream DestinationStream = File.Create(outputPath + file.Name))
            {
                SourceStream.CopyToAsync(DestinationStream);
            }
        }
    }
}

用两个循环解决了这个问题，一个用于所有子目录(第一个)，另一个用于主目录:

foreach (string dirPath in Directory.GetDirectories(StartDirectory, "*", SearchOption.AllDirectories))
            {
                Directory.CreateDirectory(dirPath.Replace(StartDirectory, EndDirectory));
                foreach (string filename in Directory.EnumerateFiles(dirPath))
                {
                    using (FileStream SourceStream = File.Open(filename, FileMode.Open))
                    {
                        using (FileStream DestinationStream = File.Create(filename.Replace(StartDirectory, EndDirectory)))
                        {
                            await SourceStream.CopyToAsync(DestinationStream);
                        }
                    }
                }
            }
            foreach (string filename in Directory.EnumerateFiles(StartDirectory))
            {
                using (FileStream SourceStream = File.Open(filename, FileMode.Open))
                {
                    using (FileStream DestinationStream = File.Create(EndDirectory + filename.Substring(filename.LastIndexOf(''''))))
                    {
                        await SourceStream.CopyToAsync(DestinationStream);
                    }
                }
            }
相关文章：