C# - DriveInfo Examples - Dot Net Perls

DriveInfo. Computers often have several drives—on Windows, these use letters such as C or D as names. The DriveInfo class provides helper methods for checking these drives.

C# method notes. With GetDrives() we can get an array of drives from a computer—this may be the most helpful DriveInfo method. The code is already debugged as it is part of .NET.

First example. Most Windows computers use the C drive name. In this program, we use the DriveInfo constructor and pass the one-character string literal "C."

Constructor

String Literal

Then We display the values returned by the properties on the DriveInfo instance. The free space properties return long values.

long, ulong

Detail The free space numbers are in bytes. It is possible to convert these to megabytes and gigabytes using custom helper methods.

Convert Bytes, Megabytes

using System; using System.IO; DriveInfo info = new DriveInfo("C"); // Print sizes. Console.WriteLine(info.AvailableFreeSpace); Console.WriteLine(info.TotalFreeSpace); Console.WriteLine(info.TotalSize); Console.WriteLine(); // Format and type. Console.WriteLine(info.DriveFormat); Console.WriteLine(info.DriveType); Console.WriteLine(); // Name and directories. Console.WriteLine(info.Name); Console.WriteLine(info.RootDirectory); Console.WriteLine(info.VolumeLabel); Console.WriteLine(); // Ready. Console.WriteLine(info.IsReady);

682166767616 682166767616 984045580288 NTFS Fixed C:\ C:\ OS True

Example 2. Sometimes a program will need to get an array of all the drives on the computer. DriveInfo.GetDrives returns an array of DriveInfo class instances.

Here We use the foreach-loop on the result of the GetDrives method. The code from the first example could be added to the loop.

foreach

using System; using System.IO; // Print all drive names. var drives = DriveInfo.GetDrives(); foreach (DriveInfo info in drives) { Console.WriteLine(info.Name); }

C:\ D:\

Summary. The DriveInfo class can be combined with the DirectoryInfo and FileInfo classes. This can improve file IO handling in certain programs.

FileInfo

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This page was last updated on Sep 7, 2023 (edit).

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