Joe Stevens' BlogEverything .NET and C#

I feel like I haven’t posted in ages. Have been busy changing job and moving house but I have a list of things I want to blog about soon.

Recently I needed to convert a number of bytes to a readable string that represents the number of kilobytes, megabytes or gigabytes.

I created an extension method for Int32 which does this for me Int64 as per Alex’s comment about the FileInfo.Length property being a long. I also changed my method for Int32 to call the other method so that it can be used for both int and long.

 

public static string ToFileSize(this int source)
{
    return ToFileSize(Convert.ToInt64(source));
}

public static string ToFileSize(this long source)
{
    const int byteConversion = 1024;
    double bytes = Convert.ToDouble(source);

    if (bytes >= Math.Pow(byteConversion, 3)) //GB Range
    {
        return string.Concat(Math.Round(bytes / Math.Pow(byteConversion, 3), 2), " GB");
    }
    else if (bytes >= Math.Pow(byteConversion, 2)) //MB Range
    {
        return string.Concat(Math.Round(bytes / Math.Pow(byteConversion, 2), 2), " MB");
    }
    else if (bytes >= byteConversion) //KB Range
    {
        return string.Concat(Math.Round(bytes / byteConversion, 2), " KB");
    }
    else //Bytes
    {
        return string.Concat(bytes, " Bytes");
    }
}

This can then be used like so:

i = 80530636; //76.8MB
Console.WriteLine(i.ToFileSize());

And the result would be

76.8 MB

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