System.IO in C# - Get Drive Information Using DriveInfo
This program demonstrates the System.IO namespace and uses the DriveInfo class to retrieve information about the drives available on the system. It displays the drive name, drive type and, when a drive is ready, its volume label, file system, available free space, total free space and total size.
10 AM Class
9 AM Class
What you'll cover
Learning objectives
- Understand the purpose of the System.IO namespace.
- Learn the System.IO classes listed in the source comments.
- Use the DriveInfo class.
- Retrieve all available drives using DriveInfo.GetDrives().
- Use a foreach loop to process each drive.
- Check whether a drive is ready using IsReady.
- Display drive name and drive type.
- Display volume label and file system information.
- Calculate and display storage values in GB.
Prerequisites
Related topics
Concept breakdown
System.IO
The source comments state that the System.IO namespace contains types that allow reading and writing to files and data streams, and types that provide basic file and directory support.
Classes Listed in System.IO Comments
The source comments list the following classes: DriveInfo, Directory, DirectoryInfo, File, FileInfo, FileStream, StreamWriter, StreamReader, BinaryWriter and BinaryReader.
DriveInfo Class
This program uses the DriveInfo class to work with drive information.
GetDrives()
DriveInfo.GetDrives() is used in the program to retrieve the drives and store them in a DriveInfo array named drives.
foreach Loop
The foreach loop processes each DriveInfo object from the drives array one by one.
Drive Name
drive.Name is used to display the name of the current drive.
Drive Type
drive.DriveType is used to display the type of the current drive.
IsReady Check
The program checks drive.IsReady before accessing and displaying additional drive information.
Volume Label
When the drive is ready, drive.VolumeLabel is displayed.
File System
When the drive is ready, drive.DriveFormat is displayed as the file system.
Storage Space Conversion
The program divides AvailableFreeSpace, TotalFreeSpace and TotalSize by 1024 three times to display the values in GB.
Display Drive Information Using DriveInfo
Step by step
- 1
Retrieve the Drives
DriveInfo.GetDrives() retrieves the drives and stores them in the drives array.
- 2
Start the foreach Loop
The foreach loop processes each DriveInfo object in the drives array.
- 3
Display the Drive Name
drive.Name is displayed for the current drive.
- 4
Display the Drive Type
drive.DriveType is displayed for the current drive.
- 5
Check Whether the Drive Is Ready
The if condition checks drive.IsReady before displaying additional information.
- 6
Display the Volume Label
When the drive is ready, drive.VolumeLabel is displayed.
- 7
Display the File System
When the drive is ready, drive.DriveFormat is displayed.
- 8
Display Available Free Space
drive.AvailableFreeSpace is divided by 1024 three times and displayed in GB.
- 9
Display Total Free Space
drive.TotalFreeSpace is divided by 1024 three times and displayed in GB.
- 10
Display Total Size
drive.TotalSize is divided by 1024 three times and displayed in GB.
- 11
Process the Next Drive
The foreach loop continues until all drives in the drives array have been processed.
Key takeaways
Key points
- System.IO is the namespace described in the source comments for file, data stream, file and directory support.
- The source comments list ten System.IO classes.
- This program uses the DriveInfo class.
- DriveInfo.GetDrives() retrieves the drives used by the program.
- A foreach loop processes each drive.
- drive.Name displays the drive name.
- drive.DriveType displays the drive type.
- drive.IsReady is checked before displaying detailed drive information.
- drive.VolumeLabel displays the volume label.
- drive.DriveFormat displays the file system.
- AvailableFreeSpace, TotalFreeSpace and TotalSize are converted to GB by dividing by 1024 three times.
Advantages
- Retrieves and displays information for all drives returned by DriveInfo.GetDrives().
- Uses a foreach loop for simple processing of the DriveInfo array.
- Checks IsReady before accessing detailed drive information.
- Displays multiple drive properties in one program.
- Converts storage values to GB for readable output.
Disadvantages
System Storage Information
This program demonstrates how an application can enumerate available drives and display storage-related information such as drive name, type, file system and free or total space.
Frequently asked questions
System.IO.
Types for reading and writing to files and data streams, and types that provide basic file and directory support.
DriveInfo.
By using DriveInfo.GetDrives().
A foreach loop.
drive.Name.
drive.DriveType.
It checks whether the drive is ready before displaying the additional drive information inside the if block.
drive.VolumeLabel.
drive.DriveFormat.
It divides the storage value by 1024, then 1024, then 1024.
Quick MCQ practice
1. Which namespace is used in this topic?
2. Which class is used to retrieve drive information?
3. Which method retrieves the drives?
4. Which loop is used to process each drive?
5. Which property displays the drive name?
6. Which property is checked before displaying detailed information?
7. Which property displays the volume label?
8. Which property is displayed as the file system?
9. Which value is used to display available free storage?
10. How many System.IO classes are listed in the source comments?
Practice on your own
Coding exercise
Display System Drive Information
Write a C# program using DriveInfo.GetDrives() to retrieve the drives, process each drive using a foreach loop and display its name and drive type. When the drive is ready, display its volume label, file system, available free space, total free space and total size.
Assignment
- Write a program to display the names of all drives using DriveInfo.GetDrives().
- Write a program to display the name and drive type of each drive.
- Write a program to display detailed information only when drive.IsReady is true.
- Write a program to display volume label and file system for ready drives.
- Write a program to display available free space and total size in GB.
Tags
References
