Question

delphi 怎么获得磁盘的符号?

Answer 1

//取物理硬盘号:2
function getHardDiskSerial: String;
begin
result:=strPas( GetIdeSerialNumber );
end;
//取物理硬盘号:1
function GetIdeSerialNumber: pchar;
const IDENTIFY_BUFFER_SIZE = 512;
type
TIDERegs = packed record
bFeaturesReg : BYTE; //Used for specifying SMART "commands".
bSectorCountReg: BYTE; //IDE sector count register
bSectorNumberReg: BYTE; //IDE sector number register
bCylLowReg: BYTE; //IDE low order cylinder value
bCylHighReg: BYTE; //IDE high order cylinder value
bDriveHeadReg: BYTE; //IDE drive/head register
bCommandReg: BYTE; //Actual IDE command.
bReserved: BYTE; //reserved for future use. Must be zero.
end;
TSendCmdInParams = packed record
cBufferSize: DWORD; //Buffer size in bytes
irDriveRegs: TIDERegs; //Structure with drive register values.
bDriveNumber: BYTE; //Physical drive number to send command to (0,1,2,3).
bReserved: array[0..2] of Byte;
dwReserved: array[0..3] of DWORD;
bBuffer: array[0..0] of Byte; //Input buffer.
end;
TIdSector = packed record
wGenConfig: Word;
wNumCyls: Word;
wReserved: Word;
wNumHeads: Word;
wBytesPerTrack: Word;
wBytesPerSector: Word;
wSectorsPerTrack: Word;
wVendorUnique: array[0..2] of Word;
sSerialNumber: array[0..19] of CHAR;
wBufferType: Word;
wBufferSize: Word;
wECCSize: Word;
sFirmwareRev: array[0..7] of Char;
sModelNumber: array[0..39] of Char;
wMoreVendorUnique: Word;
wDoubleWordIO: Word;
wCapabilities: Word;
wReserved1: Word;
wPIOTiming: Word;
wDMATiming: Word;
wBS: Word;
wNumCurrentCyls: Word;
wNumCurrentHeads: Word;
wNumCurrentSectorsPerTrack: Word;
ulCurrentSectorCapacity: DWORD;
wMultSectorStuff: Word;
ulTotalAddressableSectors: DWORD;
wSingleWordDMA: Word;
wMultiWordDMA: Word;
bReserved: array[0..127] of BYTE;
end;
PIdSector = ^TIdSector;
TDriverStatus = packed record
bDriverError: Byte; // 驱动器返回的错误代码，无错则返回0
bIDEStatus: Byte; // IDE出错寄存器的内容，只有当bDriverError 为 SMART_IDE_ERROR 时有效
bReserved: array[0..1] of Byte;
dwReserved: array[0..1] of DWORD;
end;
TSendCmdOutParams = packed record
cBufferSize: DWORD; //bBuffer的大小
DriverStatus: TDriverStatus; //驱动器状态
bBuffer: array[0..0] of BYTE; //用于保存从驱动器读出的数据的缓冲区，实际长度由cBufferSize决定
end;
var
hDevice: Thandle;
cbBytesReturned: DWORD;
SCIP: TSendCmdInParams;
aIdOutCmd: array[0..(SizeOf(TSendCmdOutParams) + IDENTIFY_BUFFER_SIZE-1)-1] of Byte;
IdOutCmd: TSendCmdOutParams absolute aIdOutCmd;
procedure ChangeByteOrder(var Data; Size: Integer);
var ptr:Pchar; i:Integer; c:Char;
begin
ptr := @Data;
for I := 0 to (Size shr 1) - 1 do begin
c := ptr^;
ptr^ := (ptr + 1)^;
(ptr + 1)^ := c;
Inc(ptr, 2);
end;
end;
begin
Result := ''; // 如果出错则返回空串
if SysUtils.Win32Platform = VER_PLATFORM_WIN32_NT then begin // Windows NT, Windows 2000
// 提示! 改变名称可适用于其它驱动器，如第二个驱动器： '\\.\PhysicalDrive1\'
hDevice := CreateFile('\\.\PhysicalDrive0', GENERIC_READ or GENERIC_WRITE,
FILE_SHARE_READ or FILE_SHARE_WRITE, nil, OPEN_EXISTING, 0, 0);
end
else // Version Windows 95 OSR2, Windows 98
hDevice := CreateFile('\\.\SMARTVSD', 0, 0, nil, CREATE_NEW, 0, 0);
if hDevice = INVALID_HANDLE_VALUE then Exit;
//
try
FillChar(SCIP, SizeOf(TSendCmdInParams) - 1, #0);
FillChar(aIdOutCmd, SizeOf(aIdOutCmd), #0);
cbBytesReturned := 0;
// Set up data structures for IDENTIFY command.
with SCIP do begin
cBufferSize := IDENTIFY_BUFFER_SIZE;
// bDriveNumber := 0;
with irDriveRegs do begin
bSectorCountReg := 1;
bSectorNumberReg := 1;
// if Win32Platform=VER_PLATFORM_WIN32_NT then bDriveHeadReg := $A0
// else bDriveHeadReg := $A0 or ((bDriveNum and 1) shl 4);
bDriveHeadReg := $A0;
bCommandReg := $EC;
end;
end;
if not DeviceIoControl(hDevice, $0007C088, @SCIP, SizeOf(TSendCmdInParams) - 1,
@aIdOutCmd, SizeOf(aIdOutCmd), cbBytesReturned, nil) then Exit;
finally
CloseHandle(hDevice);
end;
//
with PIdSector(@IdOutCmd.bBuffer)^ do begin
ChangeByteOrder(sSerialNumber, SizeOf(sSerialNumber));
(Pchar(@sSerialNumber) + SizeOf(sSerialNumber))^:= #0;
Result := Pchar(@sSerialNumber);
end;
end;

//------------获取磁盘分区序号、格式等--------------------//
Function GetDiskSerial(sDriveWithRoot:String;Var DiskS:_DiskSerialInfo;sLinkSign:String=''):Boolean;
Var
p:Pointer;
sDrive:AnsiString;
Begin { C:\ \\Server\D$\ }
Result:=False; sDrive:=Trim(sDriveWithRoot);
If sDrive[Length(sDrive)]<>'\' then sDrive:=sDrive+'\'; //必须含根号
If sDrive='\' then p:=nil else p:=pChar(sDrive);
Result:=GetVolumeInformation(p,
@DiskS.sVolumnLabel,SizeOf(DiskS.sVolumnLabel),
@DiskS.nVolumnSerial,DiskS.nMaxFileNameLength,
DiskS.nFileSystemFlag,
@DiskS.sFatType,SizeOf(DiskS.sFatType));
If Result then Begin //将数字的序列号转化为字符
//DiskS.sVolumnSerial:=Format('%8.8X',[DiskS.nVolumnSerial]);
DiskS.sVolumnSerial:=IntToHex(HiWord(DiskS.nVolumnSerial),4)+sLinkSign+
IntToHex(LoWord(DiskS.nVolumnSerial),4); //若不连接，就是16进串
End;
End;

追问

不是这样的如图这样

追答

var i:integer;
c:char;
begin
for i:=asc('A') to asc('Z') do begin
if directoryExists(chr(i)+':\') then showMessage('有盘符：') else showMessage('没有盘符'+chr(i));
end;
end;

Answer 2

http://zhidao.baidu.com/question/141259956.html