Question

我正在尝试查询文件夹并仅返回带有数字文件夹名称的文件夹。问题是我在DirectoryInfo[]对象中需要它。

我可以这样做（并且有效）：

List<string> subDirList = Directory.GetDirectories(rootPath, "*", SearchOption.TopDirectoryOnly)
                           .Where(f => Regex.IsMatch(f, @"[\\/]\d+$")).ToList();

但我真的需要这样的东西：

DirectoryInfo[] subDirs = Directory.GetDirectories(rootPath, "*", SearchOption.TopDirectoryOnly)
                                   .Where(f => Regex.IsMatch(f, @"[\\/]\d+$"));

有什么建议吗？

Answer 1

您可以使用Sub FindHighestValue() Dim vData As Variant Dim Storms As Collection Dim ndx As Long Dim ndxStorm As Long Dim MaxValue As Double Dim Previous As Double Dim InStorm As Boolean vData = Sheet1.Range("I8:I21").Value 'Change this to whatever range your wave heights are in Set Storms = New Collection Previous = 0 InStorm = False For ndx = LBound(vData, 1) To UBound(vData, 1) If vData(ndx, 1) > 0 And Previous = 0 Then 'A storm has started MaxValue = vData(ndx, 1) InStorm = True End If If InStorm And vData(ndx, 1) > MaxValue Then MaxValue = vData(ndx, 1) End If If (vData(ndx, 1) = 0 And Previous > 0) Or (ndx = UBound(vData, 1)) Then 'A storm has ended InStorm = False Storms.Add MaxValue End If Previous = vData(ndx, 1) Next If Storms.Count > 0 Then For ndx = 1 To Storms.Count Debug.Print ndx & ": " & Storms(ndx) Next End If End Sub将其映射到.Select(..)，然后使用DirectoryInfo：

ToArray()

Answer 2

实例化DirectoryInfo类型的对象，然后进行查询。方法DirectoryInfo.GetDirectories将返回所需的DirectoryInfo

类型数组

DirectoryInfo dirInfo = new DirectoryInfo(yourpath);

DirectoryInfo[] subDirs = dirInfo.GetDirectories("*", SearchOption.TopDirectoryOnly)
                         .Where(f => Regex.IsMatch(f.FullName, @"[\\/]\d+$")).ToArray();

修改

在C＃7中，您可以避免使用带有简单int.TryParse的正则表达式：

DirectoryInfo[] subDirs = dirInfo.GetDirectories("*", SearchOption.TopDirectoryOnly) .Where(f => int.TryParse(f.Name, out _)).ToArray();

在C＃7下面，您需要int值的out类型的额外变量

如何返回由数字文件夹名称组成的DirectoryInfo对象？

2 个答案: