使用正則表達式列表查找匹配的目錄

Question

我有一個IEnumerable <DirectoryInfo>我想使用正則表達式數組來篩選可能的匹配。我一直試圖加入我的目錄和正則表達式字符串使用linq，但似乎無法做到正確。這就是我想要做的...

string[] regexStrings = ... // some regex match code here. 

// get all of the directories below some root that match my initial criteria. 
var directories = from d in root.GetDirectories("*", SearchOption.AllDirectories) 
        where (d.Attributes & (FileAttributes.System | FileAttributes.Hidden)) == 0 
         && (d.GetDirectories().Where(dd => (dd.Attributes & (FileAttributes.System | FileAttributes.Hidden)) == 0).Count() > 0// has directories 
          || d.GetFiles().Where(ff => (ff.Attributes & (FileAttributes.Hidden | FileAttributes.System)) == 0).Count() > 0) // has files) 
        select d; 

// filter the list of all directories based on the strings in the regex array 
var filteredDirs = from d in directories 
        join s in regexStrings on Regex.IsMatch(d.FullName, s) // compiler doesn't like this line 
        select d; 

...有關如何讓這個工作的任何建議？

Answer 1

如果你只是想匹配所有的正則表達式該目錄。

var result = directories 
    .Where(d => regexStrings.All(s => Regex.IsMatch(d.FullName, s))); 

如果您只想要至少匹配一個正則表達式的目錄。

var result = directories 
    .Where(d => regexStrings.Any(s => Regex.IsMatch(d.FullName, s))); 

Answer 2

你缺少你在哪裏前面關鍵字加入

Answer 3

我不認爲你正在服用的方法是你想反正什麼。這將檢查所有正則表達式字符串的名稱，而不是在第一場比賽中短路。此外，如果一個模式匹配多個模式，它將複製目錄。

我想你想要的東西，如：

string[] regexStrings = ... // some regex match code here. 

// get all of the directories below some root that match my initial criteria. 
var directories = from d in root.GetDirectories("*", SearchOption.AllDirectories) 
        where (d.Attributes & (FileAttributes.System | FileAttributes.Hidden)) == 0 
         && (d.GetDirectories().Where(dd => (dd.Attributes & (FileAttributes.System | FileAttributes.Hidden)) == 0).Count() > 0// has directories 
          || d.GetFiles().Where(ff => (ff.Attributes & (FileAttributes.Hidden | FileAttributes.System)) == 0).Count() > 0) // has files) 
        select d; 

// filter the list of all directories based on the strings in the regex array 
var filteredDirs = directories.Where(d => 
    { 
     foreach (string pattern in regexStrings) 
     { 
      if (System.Text.RegularExpressions.Regex.IsMatch(d.FullName, pattern)) 
      { 
       return true; 
      } 
     } 

     return false; 
    });