Directory.Move不起作用(文件已存在)

Question

我有主文件夹:

c:\test

我有2个文件夹:电影和照片.

照片有三个文件夹,文件结构相同:人物,动物和建筑物.我正在尝试这段代码:

Directory.Move(@"c:\test\Movies", @"c:\test\Test");

我得到例外:

File already exists

Answer 1

此方法将递归移动文件夹的内容并覆盖现有文件.
您应该添加一些异常处理.
编辑:
此方法使用while循环和堆栈而不是递归来实现.

public static void MoveDirectory(string source, string target)
{
    var stack = new Stack<Folders>();
    stack.Push(new Folders(source, target));

    while (stack.Count > 0)
    {
        var folders = stack.Pop();
        Directory.CreateDirectory(folders.Target);
        foreach (var file in Directory.GetFiles(folders.Source, "*.*"))
        {
             string targetFile = Path.Combine(folders.Target, Path.GetFileName(file));
             if (File.Exists(targetFile)) File.Delete(targetFile);
             File.Move(file, targetFile);
        }

        foreach (var folder in Directory.GetDirectories(folders.Source))
        {
            stack.Push(new Folders(folder, Path.Combine(folders.Target, Path.GetFileName(folder))));
        }
    }
    Directory.Delete(source, true);
}
public class Folders
{
    public string Source { get; private set; }
    public string Target { get; private set; }

    public Folders(string source, string target)
    {
        Source = source;
        Target = target;
    }
}

更新:
这是一个更简单的版本,使用Directory.EnumerateFiles递归而不是使用堆栈.
这只适用于.net 4或更高版本,对我们来说,早期版本的.net更改Directory.EnumerateFiles为Directory.GetFiles.

public static void MoveDirectory(string source, string target)
{
    var sourcePath = source.TrimEnd('\\', ' ');
    var targetPath = target.TrimEnd('\\', ' ');
    var files = Directory.EnumerateFiles(sourcePath, "*", SearchOption.AllDirectories)
                         .GroupBy(s=> Path.GetDirectoryName(s));
    foreach (var folder in files)
    {
        var targetFolder = folder.Key.Replace(sourcePath, targetPath);
        Directory.CreateDirectory(targetFolder);
        foreach (var file in folder)
        {
            var targetFile = Path.Combine(targetFolder, Path.GetFileName(file));
            if (File.Exists(targetFile)) File.Delete(targetFile);
            File.Move(file, targetFile);
        }
    }
    Directory.Delete(source, true);
}

Answer 2

目标目录不应该已存在 - Directory.Move方法为您创建目标目录.