How do I Get Folder Size in C#?

Question

Possible Duplicate:
How do I get a directory size (files in the directory) in C#?

In vbscript, it's incredibly simple to get the folder size in GB or MB:

Set oFSO = CreateObject("Scripting.FileSystemObject")
Dim fSize = CInt((oFSO.GetFolder(path).Size / 1024) / 1024)
WScript.Echo fSize

In C#, with all my searches, all I can come up with are long, convoluted, recursive searches for every file size in all subfolders, then add them all up at the end.

Is there no other way?

VBScript and C# run on different environments, you know. Maybe the easiest way is to run a VBScript from your app. Check this out: http://stackoverflow.com/questions/200422/how-to-call-a-vbscript-file-in-a-c-sharp-application — Andre Calil, Aug 28 '12 at 19:44
@SLaks Could you point what would be an easier way? I don't know of any builtin solution besides the sum of the files. — Andre Calil, Aug 28 '12 at 19:47

score 28 · Accepted Answer · edited May 23 '17 at 11:54

28

How about this:

private static long GetDirectorySize(string folderPath)
{
    DirectoryInfo di = new DirectoryInfo(folderPath);
    return di.EnumerateFiles("*", SearchOption.AllDirectories).Sum(fi => fi.Length);
}

from here.

This will give you the size in bytes; you will have to "prettify" that into GBs or MBs.

NOTE: This only works in .NET 4+.

EDIT: Changed the wildcard search from "*.*" to "*" as per the comments in the thread to which I linked. This should extend its usability to other OSes (if using Mono, for example).

edited May 23 '17 at 11:54

Community

1
1

answered Aug 28 '12 at 19:44

Cᴏʀʏ

105,112
20
162
194

It's too small an edit for me to get it through but I think you meant to put `.Sum(di => di.Length);` – Spacemancraig Aug 28 '12 at 19:49
+1 Sincerly, I prefer this to my solution. – Omar Aug 28 '12 at 20:21
3

@Spacemancraig: No, `fi` should be correct, because we are naming each `FileInfo` object enumerated by `di.EnumerateFiles()`. – Cᴏʀʏ Aug 28 '12 at 20:22
That "prettify" can be found here http://stackoverflow.com/questions/14488796/does-net-provide-an-easy-way-convert-bytes-to-kb-mb-gb-etc – prabhakaran Mar 12 '14 at 10:20

score 4 · Answer 2 · answered Aug 28 '12 at 20:14

4

You can also use recursion to get all subdirectories and sum the sizes:

public static long GetDirectorySize(string path){
    string[] files = Directory.GetFiles(path);
    string[] subdirectories = Directory.GetDirectories(path);

    long size = files.Sum(x => new FileInfo(x).Length);
    foreach(string s in subdirectories)  
        size += GetDirectorySize(s);

    return size;
}

answered Aug 28 '12 at 20:14

Omar

16,329
10
48
66

1

Correct but *"In C#, with all my searches, all I can come up with are long, convoluted, recursive searches for every file size in all subfolders, then add them all up at the end."* – L.B Aug 28 '12 at 20:29

How do I Get Folder Size in C#?

2 Answers2

Linked