We are very familiar with drive properties in
operating system, through drive properties
We can gain important information of selected
drive such as used space, free space, file system….
We can also create drive property page in vb.net
by using Driveinfo class of System.IO namespaces.
User can determine
what drives are available and capacity and
available free space on the drive. System.IO.DriveInfo provides various methods
and properties for handling above discussed task these are as follows:
Methods :
Name |
Description |
Equals(Object) |
Determines whether the specified Object is equal to the
current Object. |
Finalize |
Allows an Object to attempt to free resources and perform
other cleanup operations before the Object is reclaimed by garbage
collection. |
GetDrives |
Retrieves the drive names of all logical drives on a
computer. |
GetHashCode |
Serves as a hash function for a particular type |
GetType |
Gets the Type of the current instance |
MemberwiseClone |
Creates a shallow copy of the current Object.
|
ToString |
Returns a drive name as a string. |
Properties :
Name |
Description |
AvailableFreeSpace |
Indicates the amount of available free space on a drive. |
DriveFormat |
Gets the name of the file system, such as NTFS or FAT32. |
DriveType |
Gets the drive type. |
IsReady |
Gets a value indicating whether a drive is ready. |
Name |
Gets the name of a drive. |
RootDirectory |
Gets the root directory of a drive. |
TotalFreeSpace |
Gets the total amount of free space available on a drive. |
TotalSize |
Gets the total size of storage space on a drive. |
VolumeLabel |
Gets or sets the volume label of a drive. |
Code :
Add new window form and add some controls Labels,
Groupboxes,buton(see picture)
Create load event of form, selectedindexChanged
event of combox and paint event of groupbox on where chart is shown.
Now first we need to bind all available drive's
name in combo box like this
Private Sub
Form1_Load(ByVal sender
As System.Object,
ByVal e As System.EventArgs)
Handles MyBase.Load
Dim drives As
System.IO.DriveInfo() = System.IO.DriveInfo.GetDrives
For i As
Integer = 0 To
drives.Length - 1
cmbCombo.Items.Add(drives(i).ToString)
Next
cmbCombo.SelectedIndex = -1
End Sub
For showing various information regarding
selected drive we need to write this code on SelectedIndexChanged event of combo
box:
Dim Drive_Info
As System.IO.DriveInfo
Drive_Info = New
System.IO.DriveInfo(cmbCombo.Text)
lblName.Text = Drive_Info.Name
If Drive_Info.IsReady
Then
If Drive_Info.VolumeLabel.Length > 0
Then
lblVolumeLabel.Text = Drive_Info.VolumeLabel
lblVolumeLabel.Text =
"None"
End If
lblFileSystem.Text = Drive_Info.DriveFormat
lblType.Text = Drive_Info.DriveType
lblRootDir.Text = Drive_Info.RootDirectory.FullName
lblCapacity.Text = Drive_Info.TotalSize &
" (Bytes)"
lblAvalspace.Text = Drive_Info.TotalFreeSpace &
" (Bytes)"
Dim usedSpace
As Long
usedSpace = Drive_Info.TotalSize - Drive_Info.TotalFreeSpace
lblUsedSpace.Text = usedSpace & " (Bytes)"
Dim ProgressCurrentValue
As Integer =
usedSpace * 100 / Drive_Info.TotalSize
End
If
We can also use Pie chart for showing used and
free space in drive by various color using paint event and FillPie method of
graphices class like this
Private
Sub GroupBox3_Paint(ByVal
sender As System.Object,
ByVal e As
System.Windows.Forms.PaintEventArgs) Handles
GroupBox3.Paint
Dim rect As
Rectangle = New Rectangle(130, 50, 120, 50)
If IsInfoAvailiable
Then
e.Graphics.FillPie(Brushes.Fuchsia, rect, 0, Piemark)
e.Graphics.FillPie(Brushes.Blue, rect, Piemark, 360 - Piemark)
Application.DoEvents()
End If
End Sub