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how can i filter an arraylist with a regexp?

hello,

i need a group of files out of a directory D,
i put all files names contained in the directory D into an arraylist,

now i need to filter the arraylist as i need only to keep the files that begin with a certain
string like "0001".

files in arraylist,
0001122.txt
0001123.txt
1001234.txt
......

i need to delete - in my arraylist - all the files that dont begin with a pattern of four numbers like here "0001",

in order to get
0001122.txt
0001123.txt.

thank you very much for help,
i would be delighted with some code,

SOLUTION

Anurag Thakur

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SOLUTION

Jaime Olivares

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Erwin Pombett

ASKER

sorry for the delay.....

I agree with you, thanks for the tip,
the thing is that i'm getting my files names through ftp with ftplib, and i dont have the possibility to
filter as you want me to filter,

this is how i recover the list of files,
if there's a possibility to do differently, without having all the files in the request , i would be happy,

public ArrayList Get_FilesListFromFTP(string aPathToFTP, string anUser, string aPass)
{
DomainLayer.FTP ftpLib = new FTP();
ArrayList _fileNameList = new ArrayList();
try
{
ftpLib.Connect(aPathToFTP.ToString(), anUser, aPass);
_fileNameList = ftpLib.ListFiles();
}catch(Exception ex)
{
Console.Write(ex.Message);
}

return _fileNameList;
}

thank you in advance,

SOLUTION

Anurag Thakur

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ASKER CERTIFIED SOLUTION

Tony McCreath

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