CODEWITHSUNDEEP
c#
Greg
Greg

Reputation: 11480

Find Particular File Types

I've encountered an peculiar issue when utilizing System.IO. When you iterate through a directory for a file with a type of File, without an extension, the file isn't detected.

// Successful:
var files = DirectoryInfo(server.Path).GetFiles("sitemap*.*);
var contents = Directory.GetFiles(server.Path, "sitemap*.*", ...);

The above code would suffice in most instances, however if you have other types with identical name, they'll be collected as well.

Our issue is encountered when you only want the sitemap.file. 

// Invalid Code:
var files = DirectoryInfo(server.Path).GetFiles("sitemap*.file);
var contents = Directory.GetFiles(server.Path, "sitemap*.file", ...);
var examples = DirectoryInfo(server.Path).GetFiles("sitemap*);

The array is empty, it doesn't find any of the raw .file extension files. I'm assuming the issue occurs because it doesn't actually have an extension.

How do you circumvent this limitation?

Update: I know I could do something along these lines with FileInfo[], but was hoping to find a more simple approach then iteration, then compare with:

var files = DirectoryInfo(server.Path).GetFiles("sitemap*.*);
foreach(var file in files)
     if(file.Extension != ".gz" && file.Extension != ".xml")
     {
          // Do something with File.
     }

Especially if you have a wide assortment of extensions within your directory. You would think it would account for such a type, or lack there of.

Multiple Empty Array

Upvotes: 1

Views: 112

Answers (2)

CodeCaster
CodeCaster

Reputation: 151588

The file doesn't have an extension. Configure your Explorer to not hide extensions and you'll see.

If you're only looking for extensionless files, change your if to:

 if(string.IsNullOrEmpty(file.Extension))

Upvotes: 1

Habib
Habib

Reputation: 223187

I believe you are looking to search files starting with sitemap and doesn't have any extension. Use "sitemap*." pattern. 

var contents = Directory.GetFiles(server.Path, "sitemap*.");

Notice the last dot (.) in the pattern, that specifies to get those files which doesn't have any extension associated with it.

This will give you files like:

sitemap1
sitemap2

and will exclude files like:

sitemap1.gz
sitempa2.gz

Upvotes: 7

Related Questions