How do you get the file size in C

Question

I need a way to get the size of a file using C   and not the size on disk  How is this possible   Currently I have this loop  foreach  FileInfo file in downloadedMessageInfo GetFiles            file Length  will this work      Will this return the size or the size on disk

User · Answer

MSDN FileInfo Length says that it is  the size of the current file in bytes    My typical Google search for something like this is   msdn FileInfo

User · Answer

It returns the file contents length

User · Answer

FileInfo Length will return the length of file  in bytes  not size on disk   so this is what you are looking for  I think

User · Answer

FileInfo Length will do the trick  per MSDN it   g ets the size  in bytes  of the current file    There is a nice page on MSDN on common I O tasks

User · Answer

Size on disk might be different  if you move the file to another filesystem  FAT16  NTFS  EXT3  etc   As other answerers have said  this will give you the size in bytes  not the size on disk

User · Answer

If you have already a file path as input  this is the code you need   long length   new System IO FileInfo path  Length

User · Answer

The FileInfo class  Length property returns the size of the file  not the size on disk   If you want a formatted file size  i e  15 KB  rather than a long byte value you can use CSharpLib  a package I ve made that adds more functionality to the FileInfo class  Here s an example   using CSharpLib  FileInfo info   new FileInfo  sample txt    Console WriteLine info FormatBytes         Output  15 MB

[c#] How do you get the file size in C#?

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