How to find all empty files recursively

Question

How would you find all empty files in a directory that are empty. A given file may have carriage returns or blank spaces. i need to capture those as well. I can can use code in either powershell or c#.

Answer 1

Powershell使它变得容易：

Get-ChildItem -Path C:\\dir -recurse -Filter { $_.Length -eq 0 }

#YOUR HOMEWORK: filter for your CRLF criteria as well

Answer 2

The System.IO have the classes you want

    DirectoryInfo di = new DirectoryInfo("c:\\Luke101");
    FileInfo[] fiArr = di.GetFiles();

    foreach (FileInfo fi in fiArr)
    {
        if(fi.Length == 0)
        {
            //.. Then do stuff
        }
    }

Answer 3

var files = new DirectoryInfo("Your path").GetFiles("*.*", SearchOption.AllDirectories);
foreach(var file in files) 
{
    using(var r = new StreamReader(file.OpenRead()))
    {
       string content = r.ReadToEnd();
       if(string.IsnullOrWhitespace(content))
       {
       // do stuff
       }
    }
}

Code is off the top of my had, didn't test it, by you can get the idea.

Answer 4

Get all zero byte length files or files that has only spaces, tabs, CR from the beginning of the file to the end.

Get-ChildItem <path> -Recurse | 
Where-Object {!$_.PSIsContainer -and ($_.Length -eq 0 -or ([IO.File]::ReadAllText($_.FullName) -match '^\s+$') }