How can I make my C# code check each file in a directory?

Question

Possible Duplicate:
how to read all files inside particular folder

I have the following code which I came up with:

string[] lines = System.IO.File.ReadAllLines(@"C:\Notes\Variables1.txt");
foreach (string line in lines)
{
   process(line);
}

string[] lines = System.IO.File.ReadAllLines(@"C:\Notes\test1.txt");
foreach (string line in lines)
{
   process(line);
}

Is there a simple and reliable way that I can modify the code so that it looks up all the .txt files in my Notes directory and then reads each one in turn. Some way I can code this up without having to specify each file in turn and something that won't crash if the file is empty.

score 4 · Answer 1 · edited Aug 09 '11 at 13:26

4

string[] files = Directory.GetFiles(source, "*.txt");
foreach(string filename in files) 
{
   //go do something with the file
}

edited Aug 09 '11 at 13:26

SwDevMan81

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answered Aug 09 '11 at 13:21

JonH

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score 2 · Answer 2 · answered Aug 09 '11 at 13:21

2

Use the DirectoryInfo class to get a listing of all files.

Is has an overloaded EnumerateFiles method, just for this.

answered Aug 09 '11 at 13:21

Oded

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hunter · Accepted Answer · 2011-08-09T13:28:30.453

1

You can get a collection of the files in any given directory using Directory.GetFiles(). Then just process them one by one like you were already doing.

string[] files = Directory.GetFiles(@"C:\Notes", "*.txt", SearchOption.TopDirectoryOnly);
foreach(string file in files)
{
    string[] lines = File.ReadAllLines(file);
    foreach (string line in lines)
    {
        process(line);
    }        
}

There's a lot more in the System.IO namespace.

edited Aug 09 '11 at 13:28

answered Aug 09 '11 at 13:22

hunter

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Thanks. By the way is there some way I can get the filename and put it into a string? – Jason Aug 09 '11 at 13:40
1

@Jason: It's already in the `string file`. If you need to strip away the extension, path, etc. you should fill this string into a [`FileInfo`](http://msdn.microsoft.com/en-us/library/system.io.fileinfo.aspx) or use the static methods of the [`Path`](http://msdn.microsoft.com/en-us/library/system.io.path_methods.aspx) class. – Oliver Aug 09 '11 at 13:45

score 0 · Answer 4 · edited Aug 09 '11 at 13:27

0

string[] files = Directory.GetFiles(directory);
foreach(string filename in files)
{
   if (Path.GetExtension(filename) != ".txt")
      continue;

   string[] lines = System.IO.File.ReadAllLines(filename);
   foreach (string line in lines)
   {
      process(line);
   }
}

edited Aug 09 '11 at 13:27

SwDevMan81

48,814
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answered Aug 09 '11 at 13:22

Chris Kooken

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score 0 · Answer 5 · answered Aug 09 '11 at 13:22

0

Use System.IO.Directory.ReadFiles

For example:

string[] filePaths = Directory.GetFiles(@"c:\Notes\", "*.txt")

Then simply iterate through the file paths

answered Aug 09 '11 at 13:22

Steve Mallam

456
2
6

score 0 · Answer 6 · answered Aug 09 '11 at 13:23

You want:

Directory.GetFiles(path, "*.txt");

This will return an array of names so you can loop over each file in turn:

foreach (string file in Directory.GetFiles(path, "*.txt"))
{
    string[] lines = System.IO.File.ReadAllLines(file);
    foreach (string line in lines)
    {
        process(line);
    }
}

How can I make my C# code check each file in a directory?

6 Answers6