, , , .. . GetLogicalDrivers:
DWORD GetLogicalDrives(VOID)
32- , , : 0 - , 1 - B, 2 - .., 25 - Z. .
GetVolumeInformation, , , , , - DWORD:
BOOL GetVolumeInformation(
LPCTSTR lpRootPathName,
LPTSTR lpVolumeNameBuffer,
DWORD nVolumeNameSize,
LPDWORD lpVolumeSerialNumber,
LPDWORD lpMaximumComponentLength,
LPDWORD lpFileSystemFlags,
LPTSTR lpFileSystemNameBuffer,
DWORD nFileSystemNameSize
);
- lpRootPathName - , . NULL, .
. lpVolumeNameBuffer - , , - nVolumeNameSize - .
- lpVolumeSerialNumber .
- lpMaximumComponentLength , . FAT32 NTFS 255.
- lpFileSystemFlags , (. 23), .
. 23 lpFileSystemFlags
| FS_CASE_SENSITIVE | 0x00000001 | , . |
| FS_CASE_IS_PRESERVED | 0x00000002 | , . |
| FS_UNICODE_STORED_ON_DISK | 0x00000004 | , Unicode. |
| FS_PERSISTENT_ACLS | 0x00000008 | , ACL ( NTFS). |
| FS_FILE_COMPRESSION | 0x00000010 | , . |
| FS_VOL_IS_COMPRESSED | 0x00008000 | , , , . |
. lpFileSystemNameBuffer - , , - nFileSystemNameSize - .
|
|
|
(lpRootPathName, lpVolumeNameBuffer, lpVolumeSerialNumber lpFileSystemNameBuffer) , , GetMem.
GetVolumeInformation . FALSE, .
GetDriveType:
UINT GetDriveType(LPCTSTR lpRootPathName);
, . (. 24).
. 24
| DRIVE_UNKNOWN | . | |
| DRIVE_NO_ROOT_DIR | . | |
| DRIVE_REMOVABLE | ( ). | |
| DRIVE_FIXED | ( ). | |
| DRIVE_REMOTE | ( ). | |
| DRIVE_CDROM | CDROM. | |
| DRIVE_RAMDISK | RAM-. |
GetDiskFreeSpace :
BOOL GetDiskFreeSpace (
LPCTSTR lpRootPathName,
LPDWORD lpSectorsPerCluster,
LPDWORD lpBytesPerSector,
LPDWORD lpNumberOfFreeClusters,
LPDWORD lpTotalNumberOfClusters
);
- lpRootPathName - , . NULL, .
- lpSectorsPerCluster .
- lpBytesPerSector .
- lpNumberOfFreeClusters .
- lpTotalNumberOfClusters .
.1. , , . 6.
. 6
.2. TComboBox, OnCreate , :
procedure TForm1.FormCreate(Sender: TObject);
var mask,LogDrives,i: DWORD;
begin
LogDrives:=GetLogicalDrives;
mask:=1;
i:=0;
repeat
if (mask and LogDrives) <> 0
then ComboBox1.AddItem(chr(ord('A')+i)+':'+'\',nil);
i:=i+1;
mask:=mask shl 1;
until mask = 0;
end;
.3. ComboBox1 , StringGrid1.
GetVolumeInformation, GetDiskFreeSpace GetDriveType. , : , , . public TForm1 :
|
|
|
TForm1 = class(TForm)
//
private
{ Private declarations }
public
{ Public declarations }
SectorsPerClaster,BytesPerSector,FreeClasters,Clusters: DWORD;
Free,Busy,All: Int64;
MaxCompLength,FileSystemFlags: DWORD;
RootPathName,VolNameBuf,FileSystemNameBuf: PChar;
VolSerialNumber: PDWORD;
end;
OnCreate :
procedure TForm1.FormCreate(Sender: TObject);
var mask,LogDrives,i: DWORD;
begin
//
for i:=0 to high(InfoDrive) do
StringGrid1.Cells[0,i]:=InfoDrive[i]; //
//
GetMem(VolNameBuf,255);
GetMem(VolSerialNumber,255);
GetMem(FileSystemNameBuf,255);
end;
( GetMem) , .
OnChange Combobox1, :
procedure TForm1.ComboBox1Select(Sender: TObject);
var sDriveType: string;
BytesPerClaster: Int64;
begin
RootPathName:=PChar(ComboBox1.Items.Strings[ComboBox1.ItemIndex]);
if GetVolumeInformation(RootPathName,VolNameBuf,255,
VolSerialNumber,MaxCompLength,FileSystemFlags,
FileSystemNameBuf,255) then begin
StringGrid1.Cells[1,0]:=RootPathName;
StringGrid1.Cells[1,1]:=VolNameBuf;
StringGrid1.Cells[1,2]:=IntToHex(DWORD(VolSerialNumber^),8);
StringGrid1.Cells[1,3]:=IntToStr(MaxCompLength);
StringGrid1.Cells[1,4]:=IntToHex(FileSystemFlags,8);
StringGrid1.Cells[1,5]:=FileSystemNameBuf;
end
if GetDiskFreeSpace(RootPathName,SectorsPerClaster,
BytesPerSector,FreeClasters,Clusters) then begin
StringGrid1.Cells[1,6]:=IntToStr(SectorsPerClaster);
StringGrid1.Cells[1,7]:=IntToStr(BytesPerSector);
StringGrid1.Cells[1,8]:=IntToStr(FreeClasters);
StringGrid1.Cells[1,9]:=IntToStr(Clusters-FreeClasters);
StringGrid1.Cells[1,10]:=IntToStr(Clusters);
end
BytesPerClaster:=SectorsPerClaster*BytesPerSector;
All:=BytesPerClaster*Clusters;
Free:=BytesPerClaster*FreeClasters;
Busy:=All-Free;
StringGrid1.Cells[1,11]:=IntToStr(Free);
StringGrid1.Cells[1,12]:=IntToStr(Busy);
StringGrid1.Cells[1,13]:=IntToStr(All);
StringGrid1.Cells[1,14]:=TypeDrive[GetDriveType(RootPathName)];
end;
, :
procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
FreeMem(VolNameBuf,255);
FreeMem(VolSerialNumber,255);
FreeMem(FileSystemNameBuf,255);
end;
1. FAT12.
2. FAT16.
3. FAT32.
4. NTFS.
5. CDFS.
6. C Win32 API Delphi , ;
7. C Win32 API Delphi , .
1. .. : . .: . 2006. -501 .
2. .., .. . . 2- . .: . 2008. 669 .
3. .. . : . 2007. -558 .
4. .. : . 2- . .: , 2007. 416 .
5. .. . . -. , 2006, 512
