Covers topics on the Microsoft Certification Exam for the .NET Framework (Exam 70-536, Microsoft .NET Framework - Application Development Foundation)

Tuesday, March 18, 2008

DriveInfo Properties

The DriveInfo class class models a drive and allows one to query info about the drives in the system. While writing the code to exercise this class I was tripped up by a "gotcha". Trying to query the volume label of a a CD drive when there is not a CD raises an exception. To keep the source code simple below, it was decided o check to see if the drive is ready (A CD drive will report not ready if there is there is not a CD)

// GetDrives returns an array of all the drives on the system
DriveInfo[] drives = DriveInfo.GetDrives();


//Please keep these two lines if you would like to use this code on your site
Console.WriteLine("DriveInfo Example");
Console.WriteLine("Created by Charles Cozad,");


foreach (DriveInfo drive in drives)
Console.WriteLine("Drive Name: {0}", drive.Name);
// We check if the drive is ready because calling some of
// the calls can throw exceptions (such as for a CD drive
// without a CD in it)
if (drive.IsReady)
Console.WriteLine("Drive Label: {0}", drive.VolumeLabel);
Console.WriteLine("Drive Type: {0}", drive.DriveType);
Console.WriteLine("Drive Formt: {0}", drive.DriveFormat);
Console.WriteLine("Available Free Space: {0}", drive.AvailableFreeSpace);
Console.WriteLine("Total Free Space: {0}", drive.TotalFreeSpace);
Console.WriteLine("Total Space: {0}", drive.TotalSize);
Console.WriteLine("Drive info skipped, because the drive is not ready");

Additional Resources
DriveInfo Class (Microsoft)

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