Getting all file names from a folder using C#

Question

I wanted to know if it is possible to get all the names of text files in a certain folder.

For example, I have a folder with the name Maps, and I would like to get the names of all the text files in that folder and add it to a list of strings.

Is it possible, and if so, how I can achieve this?

Solution 1

using System.IO;

DirectoryInfo d = new DirectoryInfo(@"D:\Test"); //Assuming Test is your Folder

FileInfo[] Files = d.GetFiles("*.txt"); //Getting Text files
string str = "";

foreach(FileInfo file in Files )
{
  str = str + ", " + file.Name;
}

Solution 2

using System.IO; //add this namespace also 

---

string[] filePaths = Directory.GetFiles(@"c:\Maps\", "*.txt",
                                         SearchOption.TopDirectoryOnly);

Solution 3

It depends on what you want to do.

ref: http://www.csharp-examples.net/get-files-from-directory/

This will bring back ALL the files in the specified directory

string[] fileArray = Directory.GetFiles(@"c:\Dir\");

This will bring back ALL the files in the specified directory with a certain extension

string[] fileArray = Directory.GetFiles(@"c:\Dir\", "*.jpg");

This will bring back ALL the files in the specified directory AS WELL AS all subdirectories with a certain extension

string[] fileArray = Directory.GetFiles(@"c:\Dir\", "*.jpg", SearchOption.AllDirectories);

Hope this helps

Solution 4

Does exactly what you want.

System.IO.Directory.GetFiles

Solution 5

Take a look at Directory.GetFiles Method (String, String) (MSDN).

This method returns all the files as an array of filenames.

View more solutions

Comments

[James Culshaw]

Much more efficient to use the inbuilt GetFiles method on the Directory class.

[Jeff]

Using System.IO;

[Jared Wadsworth]

FileInfo has a lot of overhead, it would be much better to use Path.GetFileName(filePath)

[Aaron Franke]

How does Directory.GetFiles compare to the DirectoryInfo and FileInfo approach?

[Aaron Franke]

How does DirectoryInfo and FileInfo compare to the Directory.GetFiles approach?

[Aaron Franke]

IO is capitalized.

[Pona]

@AaronFranke Directory.GetFiles will give you an array of fullpaths of the files contained in the Directory, whereas the DirectoryInfo approach will give you an array of FileInfo, which contains more info about each file, such as filename, extension, size, modified time, etc.

[the_lone_note]

Around here we discourage simply linking to the manual. Next time you should also paste in the relevant information with your answer here.

[arsdever]

@Jeff Please be under some answers, where it's not obvious which namespaces are used :D Thx.