delphi读取磁盘信息

delphi之磁盘篇

　　1．读硬盘序列号

function GetDiskSerial(DiskChar: Char): string;

var

SerialNum : pdword;
a, b : dword;
Buffer : array [0..255] of char;
begin
result := "";
if GetVolumeInformation(PChar(diskchar+":\"), Buffer, SizeOf(Buffer), SerialNum,
a, b, nil, 0) then
　Result := IntToStr(SerialNum^);

end;

　　2．检查磁盘是否就绪

Function DiskReady(Root: string) : Boolean;

var

Oem : CARDINAL ;
Dw1,Dw2 : DWORD ;

begin

Oem := SetErrorMode( SEM_FAILCRITICALERRORS ) ;

if LENGTH(Root) = 1 then Root := Root + ":\\" ;
　Result := GetVolumeInformation( PCHAR( Root ), NIL,0,NIL, Dw1,Dw2, NIL,0 ) ;
　SetErrorMode( Oem ) ;

end;

　　3．检查驱动器A中磁盘是否有效

type

　TDriveState = (DSNODISK, DSUNFORMATTEDDISK, DSEMPTYDISK, DSDISK_WITHFILES);
　……
　function DriveState (driveletter: Char) : TDriveState;

　var

　mask: String[6];
　sRec: TSearchRec;
　oldMode: Cardinal;
　retcode: Integer;

begin

　oldMode := SetErrorMode(SEM_FAILCRITICALERRORS);
　mask:= "?:\*.*";
　mask[1] := driveletter;
　{$I-}
　retcode := FindFirst (mask, faAnyfile, Srec);
　FindClose(Srec);
　{$I+}
　case retcode of
　　0 : Result := DSDISK_WITHFILES; //磁盘有文件
　　-18 : Result := DSEMPTYDISK; //好的空磁盘
　　-21, -3: Result := DSNODISK; //NT,Win31的错误代号

　else

　Result := DSUNFORMATTEDDISK;
end;

4. 获取所有盘符和计算剩余

procedure TFileForm.GetDisks;
  var
  str:string;
  Drivers:Integer;
  driver:char;
  i,temp,disksizee:integer;
  d1,d2,d3,d4: DWORD;

begin

    Drivers:=GetLogicalDrives;
    temp:=(1 and Drivers);
    for i:=0 to 26 do
      begin
        if temp=1 then
          begin
            driver:=char(i+integer('A'));
            str:=driver+':';
            if (driver<>'') and (getdrivetype(pchar(str))<>drive_cdrom) and (getdrivetype(pchar(str))<>DRIVE_REMOVABLE) then
            begin
              GetDiskFreeSpace(pchar(str),d1,d2,d3,d4);
              lbxDisks.Items.Add(str+Format('-----------总空间: %f GB',[d4/1024/1024/1024*d2*d1])+Format('--------剩余空间: %f GB',[d3/1024/1024/1024*d2*d1]));
            end;
          end;
        drivers:=(drivers shr 1);
        temp:=(1 and Drivers);
      end;
  end;

　SetErrorMode(oldMode);

end;