8.C#
Download as PPTX, PDF0 likes480 views
This document provides information about classes in the System.IO namespace that can be used to work with files, directories, and drives in .NET. It describes the DirectoryInfo, FileInfo, and DriveInfo classes, which expose properties and methods for retrieving information about directories, files, and drives respectively. It also describes the Directory class, which contains static methods for working with directories and subdirectories. Examples are provided to demonstrate getting drive information using DriveInfo and listing files in a directory.
![Example of Drive Info
public static void Main()
{
DriveInfo[] allDrives = DriveInfo.GetDrives();
foreach (DriveInfo d in allDrives)
{
Console.WriteLine("Drive {0}", d.Name);
Console.WriteLine(" File type: {0}", d.DriveType);
if (d.IsReady == true)
{
Console.WriteLine(" Volume label: {0}", d.VolumeLabel);
Console.WriteLine(" File system: {0}", d.DriveFormat);
Console.WriteLine(
" Available space to current user:{0, 15} bytes",
d.AvailableFreeSpace);
Console.WriteLine(
" Total available space: {0, 15} bytes",
d.TotalFreeSpace);
Console.WriteLine(
" Total size of drive: {0, 15} bytes ",
d.TotalSize);
}
}
System.Console.ReadLine();
}](https://image.slidesharecdn.com/8-140418062543-phpapp02/85/8-C-19-320.jpg)
8.C#
- 2. System Information Get Drive information in current system Get info of specific Drive Available Free Space DriveFormat IsReady Name RootDirectory TotalFreeSpace TotalSize VolumeLabel List Drive List Sub folders List Files
- 3. System.IO.FileInfo Provides properties and instance methods for the creation, copying, deletion, moving, and opening of files, and aids in the creation of FileStream objects. This class cannot be inherited. System.IO.DirectoryInfo Exposes instance methods for creating, moving, and enumerating through directories and subdirectories. This class cannot be inherited. System.IO.DriveInfo Provides access to information on a drive. System.IO.Directory Exposes static methods for creating, moving, and enumerating through directories and subdirectories. This class cannot be inherited.
- 4. Public Attributes Gets or sets the attributes for the current file or directory. (Inherited from FileSystemInfo.) Public CreationTime Gets or sets the creation time of the current file or directory. (Inherited from FileSystemInfo.) Public property CreationTimeUtc Gets or sets the creation time, in coordinated universal time (UTC), of the current file or directory. (Inherited from FileSystemInfo.)
- 5. Public Directory Gets an instance of the parent directory. Public DirectoryName Gets a string representing the directory's full path. Public Exists Gets a value indicating whether a file exists. (Overrides FileSystemInfo.Exists.)
- 6. Public Extension Gets the string representing the extension part of the file. (Inherited from FileSystemInfo.) Public FullName Gets the full path of the directory or file. (Inherited from FileSystemInfo.) Public property IsReadOnly Gets or sets a value that determines if the current file is read only.
- 7. Public LastAccessTime Gets or sets the time the current file or directory was last accessed. (Inherited from FileSystemInfo.) Public property LastAccessTimeUtc Gets or sets the time, in coordinated universal time (UTC), that the current file or directory was last accessed. (Inherited from FileSystemInfo.) Public LastWriteTime Gets or sets the time when the current file or directory was last written to. (Inherited from FileSystemInfo.)
- 8. Public property LastWriteTimeUtc Gets or sets the time, in coordinated universal time (UTC), when the current file or directory was last written to. (Inherited from FileSystemInfo.) Public Length Gets the size, in bytes, of the current file. Public Name Gets the name of the file. (Overrides FileSystemInfo.Name.)
- 9. DirectoryInfo Class Exposes instance methods for creating, moving, and enumerating through directories and subdirectories. This class cannot be inherited. Properties
- 10. Public property Attributes Gets or sets the attributes for the current file or directory. (Inherited from FileSystemInfo.) Public property CreationTime Gets or sets the creation time of the current file or directory. (Inherited from FileSystemInfo.) Public property CreationTimeUtc Gets or sets the creation time, in coordinated universal time (UTC), of the current file or directory. (Inherited from FileSystemInfo.)
- 11. Public Exists Gets a value indicating whether the directory exists. (Overrides FileSystemInfo.Exists.) Public Extension Gets the string representing the extension part of the file. (Inherited from FileSystemInfo.) Public FullName Gets the full path of the directory or file. (Inherited from FileSystemInfo.)
- 12. Public LastAccessTime Gets or sets the time the current file or directory was last accessed. (Inherited from FileSystemInfo.) Public LastAccessTimeUtc Gets or sets the time, in coordinated universal time (UTC), that the current file or directory was last accessed. (Inherited from FileSystemInfo.) Public LastWriteTime Gets or sets the time when the current file or directory was last written to. (Inherited from FileSystemInfo.)
- 13. Public property LastWriteTimeUtc Gets or sets the time, in coordinated universal time (UTC), when the current file or directory was last written to. (Inherited from FileSystemInfo.) Public Name Gets the name of this DirectoryInfo instance. (Overrides FileSystemInfo.Name.) Public Parent Gets the parent directory of a specified subdirectory. Public Root Gets the root portion of the directory.
- 14. System.IO.DriveInfo Public property AvailableFreeSpace Indicates the amount of available free space on a drive, in bytes. Public property DriveFormat Gets the name of the file system, such as NTFS or FAT32. Public property DriveType Gets the drive type, such as CD-ROM, removable, network, or fixed.
- 15. Public property IsReady Gets a value that indicates whether a drive is ready. Public property Name Gets the name of a drive, such as C:. Public property RootDirectory Gets the root directory of a drive.
- 16. Public property TotalFreeSpace Gets the total amount of free space available on a drive, in bytes. Public property TotalSize Gets the total size of storage space on a drive, in bytes. Public property VolumeLabel Gets or sets the volume label of a drive.
- 17. Methods DriveInfo and Example GetDrives() Retrieves the drive names of all logical drives on a computer.
- 18. Directory Class Methods Delete(String) Deletes an empty directory from a specified path. Exists() Determines whether the given path refers to an existing directory on disk. GetAccessControl(String) Gets a DirectorySecurity object that encapsulates the access control list (ACL) entries for a specified directory GetCurrentDirectory() Returns the names of subdirectories (including their paths) in the specified directory.
- 19. Example of Drive Info public static void Main() { DriveInfo[] allDrives = DriveInfo.GetDrives(); foreach (DriveInfo d in allDrives) { Console.WriteLine("Drive {0}", d.Name); Console.WriteLine(" File type: {0}", d.DriveType); if (d.IsReady == true) { Console.WriteLine(" Volume label: {0}", d.VolumeLabel); Console.WriteLine(" File system: {0}", d.DriveFormat); Console.WriteLine( " Available space to current user:{0, 15} bytes", d.AvailableFreeSpace); Console.WriteLine( " Total available space: {0, 15} bytes", d.TotalFreeSpace); Console.WriteLine( " Total size of drive: {0, 15} bytes ", d.TotalSize); } } System.Console.ReadLine(); }
- 20. Drive C: File type: Fixed Volume label: Windows File system: NTFS Available space to current user: 135662944256 bytes Total available space: 135662944256 bytes Total size of drive: 320070479872 bytes Drive D: File type: CDRom Drive Q: File type: Fixed
- 21. Example of File info Total PhysicalMemory example