我试图使用Directory.GetFiles()方法检索多种类型的文件列表,如mp3的和jpg的。以下两种方法我都试过了,但都没有成功:
Directory.GetFiles("C:\\path", "*.mp3|*.jpg", SearchOption.AllDirectories);
Directory.GetFiles("C:\\path", "*.mp3;*.jpg", SearchOption.AllDirectories);
有没有办法一次就能搞定?
我试图使用Directory.GetFiles()方法检索多种类型的文件列表,如mp3的和jpg的。以下两种方法我都试过了,但都没有成功:
Directory.GetFiles("C:\\path", "*.mp3|*.jpg", SearchOption.AllDirectories);
Directory.GetFiles("C:\\path", "*.mp3;*.jpg", SearchOption.AllDirectories);
有没有办法一次就能搞定?
当前回答
是什么
string[] filesPNG = Directory.GetFiles(path, "*.png");
string[] filesJPG = Directory.GetFiles(path, "*.jpg");
string[] filesJPEG = Directory.GetFiles(path, "*.jpeg");
int totalArraySizeAll = filesPNG.Length + filesJPG.Length + filesJPEG.Length;
List<string> filesAll = new List<string>(totalArraySizeAll);
filesAll.AddRange(filesPNG);
filesAll.AddRange(filesJPG);
filesAll.AddRange(filesJPEG);
其他回答
我知道这是一个老问题,但LINQ:(.NET40+)
var files = Directory.GetFiles("path_to_files").Where(file => Regex.IsMatch(file, @"^.+\.(wav|mp3|txt)$"));
只是找到了另一种方法。仍然不是一次操作,而是把它扔出去,看看其他人是怎么想的。
private void getFiles(string path)
{
foreach (string s in Array.FindAll(Directory.GetFiles(path, "*", SearchOption.AllDirectories), predicate_FileMatch))
{
Debug.Print(s);
}
}
private bool predicate_FileMatch(string fileName)
{
if (fileName.EndsWith(".mp3"))
return true;
if (fileName.EndsWith(".jpg"))
return true;
return false;
}
如果你有一个很大的扩展列表要检查,你可以使用下面的。我不想创建很多OR语句,所以我修改了lette写的东西。
string supportedExtensions = "*.jpg,*.gif,*.png,*.bmp,*.jpe,*.jpeg,*.wmf,*.emf,*.xbm,*.ico,*.eps,*.tif,*.tiff,*.g01,*.g02,*.g03,*.g04,*.g05,*.g06,*.g07,*.g08";
foreach (string imageFile in Directory.GetFiles(_tempDirectory, "*.*", SearchOption.AllDirectories).Where(s => supportedExtensions.Contains(Path.GetExtension(s).ToLower())))
{
//do work here
}
List<string> FileList = new List<string>();
DirectoryInfo di = new DirectoryInfo("C:\\DirName");
IEnumerable<FileInfo> fileList = di.GetFiles("*.*");
//Create the query
IEnumerable<FileInfo> fileQuery = from file in fileList
where (file.Extension.ToLower() == ".jpg" || file.Extension.ToLower() == ".png")
orderby file.LastWriteTime
select file;
foreach (System.IO.FileInfo fi in fileQuery)
{
fi.Attributes = FileAttributes.Normal;
FileList.Add(fi.FullName);
}
Let
var set = new HashSet<string>(
new[] { ".mp3", ".jpg" },
StringComparer.OrdinalIgnoreCase); // ignore case
var dir = new DirectoryInfo(path);
Then
dir.EnumerateFiles("*.*", SearchOption.AllDirectories)
.Where(f => set.Contains(f.Extension));
or
from file in dir.EnumerateFiles("*.*", SearchOption.AllDirectories)
from ext in set // makes sense only if it's just IEnumerable<string> or similar
where String.Equals(ext, file.Extension, StringComparison.OrdinalIgnoreCase)
select file;