Question

Currently I am getting the size of a file by using:

FileInfo fileSize = new FileInfo(@"C:\file.txt");
long size = fileSize.Length;

Rather than do this for every file I want, I thought you must be able to use an array and iterate through them so I used this:

FileInfo[] fileSizes = new FileInfo[2];
fileSizes[0] = @"C:\file.txt";
fileSizes[1] = @"C:\file.txt";

Now I keep getting the error “Cannot implicitly convert type ‘string’ to ‘System.IO.FileInfo'”. I tried using .ToString() but no dice, any help is very appreciated, thanks!

Answer 1

You shouldn’t store multiple files in a FileInfo array. To fix your error, you need to do this:

FileInfo[] fileSizes = new FileInfo[3];
fileSizes[0] = new FileInfo(@"C:\file.txt");
fileSizes[1] = new FileInfo(@"C:\file.txt");
fileSizes[2] = new FileInfo(@"C:\file.txt");

However, you should store them like this (below) and iterate through the list and load one FileInfo at a time:

String[] files = new String[3];
files[0] = @"C:\file.txt";
files[1] = @"C:\file.txt";
files[2] = @"C:\file.txt";

foreach (String file in files)
{
    FileInfo info = new FileInfo(file);
    // do something with info.Length
}