c# - 在 C# 中选择以 "NVH"而不是 "NVHE"开头的文件名

Question

我只想从目录中选择以 NVH 前缀开头的文件名。它不应该从同一目录中选择以 NVHE 开头的文件名。我该怎么做？

我已经尝试了一些东西。它们如下。它们是

//This will store all file names beginning with NVH prefix and NVHE prefix in array
string[] files11 = Directory.GetFiles(moduleDir, "NVH*.*")
                                 .Select(path => Path.GetFileName(path))
                                 .ToArray();

//This will store all file names beginning with NVHE prefix in array only
string[] files12 = Directory.GetFiles(moduleDir, "NVHE*.*")
                          .Select(path => Path.GetFileName(path))
                                 .ToArray();

现在我只希望文件名以 NVH 开头，而不是 NVHE。我该怎么做？

Answer 1

Directory.GetFiles does not support regular expressions :

The search string to match against the names of files in path. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters (see Remarks), but doesn't support regular expressions.

或者您可以使用 Directory.EnumerateFiles :

Directory.EnumerateFiles(moduleDir)
         .Select(Path.GetFileName)
         .Where(file=>file.StartsWith("NVH") && !file.StartsWith("NVHE"));

如果你想保留文件的完整路径:

Directory.EnumerateFiles(moduleDir)
         .Where(path=>
            {
               var file = Path.GetFileName(path);
               return file.StartsWith("NVH") && !file.StartsWith("NVHE")
            });

您还可以使用现有代码并以这种方式过滤第一个集合:

var result = files11.Except(files12)