如何能Directory.Getfiles（）多是searchPattern濾波器C＃

Question

可能重複：
Can you call Directory.GetFiles() with multiple filters?

我有一個字符串數組：

string[] pattern={"*.jpg","*.txt","*.asp","*.css","*.cs",.....}; 

此字符串模式

string[] dizin = Directory.GetFiles("c:\veri",pattern); 

如何將dizin變量的C：\ veri目錄下的文件賦值給目錄下？

Answer 1

你可以使用類似這樣

string[] extensions = { "jpg", "txt", "asp", "css", "cs", "xml" }; 

string[] dizin = Directory.GetFiles(@"c:\s\sent", "*.*") 
    .Where(f => extensions.Contains(f.Split('.').Last().ToLower())).ToArray(); 

或者使用FileInfo.Extension位較安全String.Split，但可能會比較慢

string[] extensions = { ".jpg", ".txt", ".asp", ".css", ".cs", ".xml" }; 

string[] dizin = Directory.GetFiles(@"c:\s\sent", "*.*") 
    .Where(f => extensions.Contains(new FileInfo(f).Extension.ToLower())).ToArray(); 

或者爲juharr提到你也可以使用System.IO.Path.GetExtension

string[] extensions = { ".jpg", ".txt", ".asp", ".css", ".cs", ".xml" }; 

string[] dizin = Directory.GetFiles(@"c:\s\sent", "*.*") 
    .Where(f => extensions.Contains(System.IO.Path.GetExtension(f).ToLower())).ToArray(); 

Answer 2

你有不同的選擇。

String[] files = Directory.GetFiles(path, "*.*", SearchOption.AllDirectories).Where(s => s.ToLower().EndsWith(".jpg") || s.ToLower().EndsWith(".txt") || s.ToLower().EndsWith(".asp")); 

或者：

String[] files = Directory.GetFiles(path).Where(file => Regex.IsMatch(file, @"^.+\.(jpg|txt|asp)$")); 

或者（如果你不使用LINQ的擴展）：

List<String> files = new List<String>(); 
String[] extensions = new String[] { "*.jpg", "*.txt", "*.asp" }; 

foreach (String extension in extensions) 
{ 
    String[] files = Directory.GetFiles(path, found, SearchOption.AllDirectories); 

    foreach (String file in files) 
     files.Add(file); 
}