Hi, its not possible to specify multiple filters in single GetFiles() method call. You can find alternatives here
Shekhar
2010-09-23 06:19:47
A:
you can try something like this:
var query = from p in Directory.GetFiles(@"C:\").AsEnumerable()
where p.Contains(".c")
|| p.Contains(".h")
select p;
anishmarokey
2010-09-23 06:23:57
No reason to call AsEnumerable here. GetFiles will have already filled the entire array.
Josh Einstein
2010-09-23 06:50:42
+1
A:
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;
Dan Tao
2010-09-23 06:28:29
@Yuriy: The only thing .NET 4.0 there is the use of `Directory.EnumerateFiles()`. Change it to `Directory.GetFiles()` and it should work just as fine.
Jeff M
2010-09-23 06:38:42
@Jeff M: I could be wrong, but I'm pretty sure @Yuriy wants to avoid calling `GetFiles()` to dodge the cost of populating a (potentially) huge `string[]` array.
Dan Tao
2010-09-23 06:46:34
@Dan: If that were the case, then getting all files then filtering wouldn't be the best way to handle this then. ;) I figured Yuriy would like to apply these filters in a single call rather than writing two separate calls by hand which seems reasonable based on the answer that was chosen.
Jeff M
2010-09-23 07:02:48
@Jeff: True -- but it'd still be cheaper (memory-wise) than `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.
Dan Tao
2010-09-23 07:15:02
A:
See How to get files with multiple extensions using extension methods.
Danny Chen
2010-09-23 06:28:47
A:
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));
}
Jeff M
2010-09-23 06:31:14
A:
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
Bear Monkey
2010-09-23 09:32:36