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How to get all the files, sub files and their size inside a directory in C#?
To get the files, C# provides a method Directory.GetFiles
Directory.GetFiles returns the names of all the files (including their paths) that match the specified search pattern, and optionally searches subdirectories.
In the below example * is matches Zero or more characters in that position.
SearchOption TopDirectoryOnly. Searches only the top directories
SearchOption AllDirectories .Searches all the top directories and sub directories
FileInfo gets the file information like Length, name
Example 1
static void Main (string[] args) {
string rootPath = @"C:\Users\Koushik\Desktop\TestFolder";
var files = Directory.GetFiles(rootPath, "*.*", SearchOption.AllDirectories);
foreach (string file in files) {
Console.WriteLine(file);
}
Console.ReadLine ();
}Output
C:\Users\Koushik\Desktop\TestFolder\TestFolderMain\TestFolderMain.txt C:\Users\Koushik\Desktop\TestFolder\TestFolderMain 1\TestFolderMain1.txt C:\Users\Koushik\Desktop\TestFolder\TestFolderMain 2\TestFolderMain2.txt C:\Users\Koushik\Desktop\TestFolder\TestFolderMain 2\TestFolderMainSubDirectory\TestFolderSubDirectory.txt
Example 2
static void Main (string[] args) {
string rootPath = @"C:\Users\Koushik\Desktop\TestFolder";
var files = Directory.GetFiles(rootPath, "*.*", SearchOption.TopDirectoryOnly);
foreach (string file in files) {
Console.WriteLine(file);
}
Console.ReadLine ();
}Output
C:\Users\Koushik\Desktop\TestFolder\Topdirectory.txt
Example 3
static void Main (string[] args) {
string rootPath = @"C:\Users\Koushik\Desktop\TestFolder";
var files = Directory.GetFiles(rootPath, "*.*", SearchOption.AllDirectories);
foreach (string file in files) {
var info = new FileInfo(file);
Console.WriteLine($"{ Path.GetFileName(file) }: { info.Length } bytes");
}
Console.ReadLine ();
}Output
Topdirectory.txt: 0 bytes TestFolderMain.txt: 0 bytes TestFolderMain1.txt: 10 bytes TestFolderMain2.txt: 20 bytes
Updated on: 25-Nov-2020
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