VB.NET下获取硬盘信息的几种方法







1、用API函数GetDiskFreeSpaceEx获取磁盘空间



Private Declare Function GetDiskFreeSpaceEx Lib "kernel32" Alias "GetDiskFreeSpaceExA" _

(ByVal lpDirectoryName As String, ByRef lpFreeBytesAvailableToCaller As Long, _

ByRef lpTotalNumberOfBytes As Long, ByRef lpTotalNumberOfFreeBytes As Long) As Long



Private Sub btnDisk_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDisk.Click

Dim BytesFreeToCalller As Long, TotalBytes As Long

Dim TotalFreeBytes As Long, TotalBytesUsed As Long

Dim strResult As String

Const RootPathName = "C:\"

Call GetDiskFreeSpaceEx(RootPathName, BytesFreeToCalller, TotalBytes, TotalFreeBytes)

strResult = " Drive " & "C:\" & vbCrLf

strResult += "磁盘容量(MB):" & Format(CDbl((TotalBytes / 1024) / 1024), "###,###,##0.00") & vbCrLf

strResult += "可用空间(MB):" & Format(CDbl((TotalFreeBytes / 1024) / 1024), "###,###,##0.00") & vbCrLf

strResult += "已用空间(MB):" & Format(CDbl(((TotalBytes - TotalFreeBytes) / 1024) / 1024), "###,###,##0.00") & vbCrLf

MsgBox(strResult)

End Sub





2、用FSO(文件系统对象模型)实现

FSO对象模型包含在SCRIPTING类型库(SCRRUN.DLL)中。调用方法如下：

在项目菜单中选择引用，在COM中选择Microsoft Scripting Runtime

在代码最顶端添加Imports Scripting，在按钮的单击事件中加入以下代码：



Imports Scripting



Private Sub btnFso_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnFso.Click

Dim Fso As New FileSystemObject

Dim drvDisk As Drive, strResult As String

drvDisk = Fso.GetDrive("C:\")

strResult = "Drive " & "C:\" & vbCrLf

strResult += "磁盘卷标:" & drvDisk.VolumeName & vbCrLf

strResult += "磁盘序列号:" & drvDisk.SerialNumber & vbCrLf

strResult += "磁盘类型:" & drvDisk.DriveType & vbCrLf

strResult += "文件系统:" & drvDisk.FileSystem & vbCrLf

strResult += "磁盘容量(G): " & FormatNumber(((drvDisk.TotalSize / 1024) / 1024) / 1024, 2, , , Microsoft.VisualBasic.TriState.True) & vbCrLf

strResult += "可用空间(G): " & FormatNumber(((drvDisk.FreeSpace / 1024) / 1024) / 1024, 2, , , Microsoft.VisualBasic.TriState.True) & vbCrLf

strResult += "已用空间(G):" & FormatNumber(((((drvDisk.TotalSize - drvDisk.FreeSpace) / 1024) / 1024) / 1024), 2, , , Microsoft.VisualBasic.TriState.True)

MsgBox(strResult)

End Sub





3、用API函数GetVolumeInformation获取逻辑盘序列号



Private Declare Function GetVolumeInformation Lib "kernel32" Alias "GetVolumeInformationA" _

(ByVal lpRootPathName As String, ByVal lpVolumeNameBuffer As String, ByVal _

nVolumeNameSize As Integer, ByRef lpVolumeSerialNumber As Long, _

ByVal lpMaximumComponentLength As Integer, ByVal lpFileSystemFlags As Integer, ByVal _

lpFileSystemNameBuffer As String, ByVal nFileSystemNameSize As Integer) As Integer



Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

Dim SerialNumber As Long

Dim TempStr1 As New String(Chr(0), 255)

Dim TempStr2 As New String(Chr(0), 255)

Dim TempInt1, TempInt2 As Integer

GetVolumeInformation("C:\", TempStr1, 256, SerialNumber, TempInt1, TempInt2, TempStr2, 256)