Apparent size is the number of bytes your applications think are in the file. It’s the amount of data that would be transferred over the network (not counting protocol headers) if you decided to send the file over FTP or HTTP. It’s also the result of cat theFile | wc -c, and the amount of … Read more
Here’s one I wrote: /** * Format bytes as human-readable text. * * @param bytes Number of bytes. * @param si True to use metric (SI) units, aka powers of 1000. False to use * binary (IEC), aka powers of 1024. * @param dp Number of decimal places to display. * * @return Formatted string. … Read more
Here is a sample: <?php // Snippet from PHP Share: http://www.phpshare.org function formatSizeUnits($bytes) { if ($bytes >= 1073741824) { $bytes = number_format($bytes / 1073741824, 2) . ‘ GB’; } elseif ($bytes >= 1048576) { $bytes = number_format($bytes / 1048576, 2) . ‘ MB’; } elseif ($bytes >= 1024) { $bytes = number_format($bytes / 1024, 2) … Read more
If the file name is used as a parameter to the batch file, all you need is %~z1 (1 means first parameter) If the file name is not a parameter, you can do something like: @echo off setlocal set file=”test.cmd” set maxbytesize=1000 FOR /F “usebackq” %%A IN (‘%file%’) DO set size=%%~zA if %size% LSS %maxbytesize% … Read more
I feel like this is too much to be doing client-side, but I don’t know the details of your application, so presuming you have to do it with jQuery… you can do a HEAD request and look at the Content-Length header. Earlier I recommended the jqHead plugin, but after I tried to use it I … Read more
Client side Upload Canceling On modern browsers (FF >= 3.6, Chrome >= 19.0, Opera >= 12.0, and buggy on Safari), you can use the HTML5 File API. When the value of a file input changes, this API will allow you to check whether the file size is within your requirements. Of course, this, as well … Read more
You can open the file using the ios::ate flag (and ios::binary flag), so the tellg() function will give you directly the file size: ifstream file( “example.txt”, ios::binary | ios::ate); return file.tellg();
If you have already a file path as input, this is the code you need: long length = new System.IO.FileInfo(path).Length;
This uses GetCompressedFileSize, as ho1 suggested, as well as GetDiskFreeSpace, as PaulStack suggested, it does, however, use P/Invoke. I have tested it only for compressed files, and I suspect it does not work for fragmented files. public static long GetFileSizeOnDisk(string file) { FileInfo info = new FileInfo(file); uint dummy, sectorsPerCluster, bytesPerSector; int result = GetDiskFreeSpaceW(info.Directory.Root.FullName, … Read more