Get Directory Size
This page was last reviewed on Jan 5, 2024.
Dot Net Perls
Directory size. A C# method can calculate the total size of a directory. It considers each file. It returns the total bytes of all files.
Some uses. This C# method is useful for compression or file transfers. We determine the size of a directory. We can detect changes in directory sizes.
Example. We can use the Directory class and a foreach-loop. We write our own custom method—we sum the length of each file, returning the total size in bytes.
Start The program calls Directory.GetFiles(). This gets all the files matching the "filter" at the directory in the path specified.
Next The program loops over each file. The foreach-loop looks through each file name and then creates a new FileInfo object.
Info FileInfo allows us to easily find certain informational properties of the file.
Finally It returns the sum of all the bytes in the first level of the folder. This value is stored in the long type.
long, ulong
using System; using System.IO; class Program { static void Main() { var size = GetDirectorySize(@"programs\"); Console.WriteLine(size); } static long GetDirectorySize(string path) { // Get array of all file names. string[] files = Directory.GetFiles(path, "*.*"); // Calculate total bytes of all files in a loop. long totalBytes = 0; foreach (string name in files) { // Use FileInfo to get length of each file. FileInfo info = new FileInfo(name); totalBytes += info.Length; } // Return total size return totalBytes; } }
All directories. To get files in nested folders, use the SearchOption.AllDirectories argument. This returns an array with files from subdirectories.
File List Recursive
Info You can modify the method to return only the sizes of files of a specific type (like PNG).
SearchOption.AllDirectories "*.*" "*.png"
Summary. We measured directory sizes in bytes. We can use a combination of Directory methods and FileInfo objects to sum the bytes.
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Sam Allen is passionate about computer languages. In the past, his work has been recommended by Apple and Microsoft and he has studied computers at a selective university in the United States.
This page was last updated on Jan 5, 2024 (edit).
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