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
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);
}
其他回答
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);
}
我有同样的问题,找不到正确的解决方案,所以我写了一个函数叫GetFiles:
/// <summary>
/// Get all files with a specific extension
/// </summary>
/// <param name="extensionsToCompare">string list of all the extensions</param>
/// <param name="Location">string of the location</param>
/// <returns>array of all the files with the specific extensions</returns>
public string[] GetFiles(List<string> extensionsToCompare, string Location)
{
List<string> files = new List<string>();
foreach (string file in Directory.GetFiles(Location))
{
if (extensionsToCompare.Contains(file.Substring(file.IndexOf('.')+1).ToLower())) files.Add(file);
}
files.Sort();
return files.ToArray();
}
这个函数只调用Directory.Getfiles()一次。
例如,像这样调用函数:
string[] images = GetFiles(new List<string>{"jpg", "png", "gif"}, "imageFolder");
编辑:要获得一个具有多个扩展名的文件,请使用这个文件:
/// <summary>
/// Get the file with a specific name and extension
/// </summary>
/// <param name="filename">the name of the file to find</param>
/// <param name="extensionsToCompare">string list of all the extensions</param>
/// <param name="Location">string of the location</param>
/// <returns>file with the requested filename</returns>
public string GetFile( string filename, List<string> extensionsToCompare, string Location)
{
foreach (string file in Directory.GetFiles(Location))
{
if (extensionsToCompare.Contains(file.Substring(file.IndexOf('.') + 1).ToLower()) &&& file.Substring(Location.Length + 1, (file.IndexOf('.') - (Location.Length + 1))).ToLower() == filename)
return file;
}
return "";
}
例如,像这样调用函数:
string image = GetFile("imagename", new List<string>{"jpg", "png", "gif"}, "imageFolder");
没有。试试下面的方法:
List<string> _searchPatternList = new List<string>();
...
List<string> fileList = new List<string>();
foreach ( string ext in _searchPatternList )
{
foreach ( string subFile in Directory.GetFiles( folderName, ext )
{
fileList.Add( subFile );
}
}
// Sort alpabetically
fileList.Sort();
// Add files to the file browser control
foreach ( string fileName in fileList )
{
...;
}
摘自:http://blogs.msdn.com/markda/archive/2006/04/20/580075.aspx
在。net 2.0中(没有Linq):
public static List<string> GetFilez(string path, System.IO.SearchOption opt, params string[] patterns)
{
List<string> filez = new List<string>();
foreach (string pattern in patterns)
{
filez.AddRange(
System.IO.Directory.GetFiles(path, pattern, opt)
);
}
// filez.Sort(); // Optional
return filez; // Optional: .ToArray()
}
然后使用它:
foreach (string fn in GetFilez(path
, System.IO.SearchOption.AllDirectories
, "*.xml", "*.xml.rels", "*.rels"))
{}
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)$"));