Possible Duplicate:
Can you call Directory.GetFiles() with multiple filters?
Does it possible to get for ex. .c and .hfiles from directory. Usage of Directory.GetFiles("C:\", ".c;.h"); does not work. It's too bad to invoke Directory.GetFiles(...); twice.. :(
Thanks.
If you're using .NET 4.0, I'd go with Directory.EnumerateFiles:
var files = from f in Directory.EnumerateFiles("C:\\")
where f.EndsWith(".c") || f.EndsWith(".h")
select f;
Directory.EnumerateFiles(). Change it to Directory.GetFiles() and it should work just as fine.
GetFiles() to dodge the cost of populating a (potentially) huge string[] array.GetFiles(), and would start returning values right away (without having to fetch all files first). But you're right; judging from the accepted answer, it seems the OP wasn't too concerned about that, actually.its not possible to specify multiple filters in single GetFiles() method call. You can find alternatives here
you can try something like this:
var query = from p in Directory.GetFiles(@"C:\").AsEnumerable()
where p.Contains(".c")
|| p.Contains(".h")
select p;
For .Net 3.5.
public IEnumerable<string> GetFiles(
string basePath,
params string[] searchPatterns)
{
if (searchPatterns == null || searchPatterns.Length == 0)
{
return Directory.GetFiles(basePath);
}
return Enumerable.SelectMany(searchPatterns,
p => Directory.GetFiles(basePath, p));
}
Usage:
GetFiles(@"c:\", "*.c", "*.h");
you probably want to add some validation
See How to get files with multiple extensions using extension methods.
Here's some useful helper functions to simulate having multiple filters:
// .NET 4.0 friendly
public static IEnumerable<string> EnumerateFiles(string path, params string[] filters)
{
return filters.Length == 0
? Directory.EnumerateFiles(path)
: filters.SelectMany(filter => Directory.EnumerateFiles(path, filter));
}
// .NET 3.5 friendly
public static IEnumerable<string> GetFiles(string path, params string[] filters)
{
return filters.Length == 0
? Directory.GetFiles(path)
: filters.SelectMany(filter => Directory.GetFiles(path, filter));
}
