delphi - 使用 Delphi 获取真实硬盘序列号

Question

我正在尝试制作delphi程序服务器和客户端，以便保护我的应用程序并确保所有用户都在控制之下，我应该给他们一个唯一的 key ，该 key 不能更改以免丢失他们的句柄，所以我认为它应该是HDD序列号+Bios SN，但我记得Bios可以在移除主板电池时更改，所以它无法工作。所以我现在选择的是硬盘真实序列号我尝试下面的代码来获取它但它不起作用

    unit Unit2;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls,WbemScripting_TLB,ActiveX;

type
  TForm4 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form4: TForm4;

implementation

{$R *.dfm}

function GetWMIstring (wmiHost, wmiClass, wmiProperty : string):string;
var  // These are all needed for the WMI querying process
  Locator:  ISWbemLocator;
  Services: ISWbemServices;
  SObject:  ISWbemObject;
  ObjSet:   ISWbemObjectSet;
  SProp:    ISWbemProperty;
  Enum:     IEnumVariant;
  Value:    Cardinal;
  TempObj:  OleVariant;
  SN: string;
begin
  try
  Locator := CoSWbemLocator.Create;  // Create the Location object
  // Connect to the WMI service, with the root\cimv2 namespace
   Services :=  Locator.ConnectServer(wmiHost, 'root\cimv2', '', '', '','', 0, nil);
  ObjSet := Services.ExecQuery('SELECT * FROM '+wmiClass, 'WQL',
    wbemFlagReturnImmediately and wbemFlagForwardOnly , nil);
  Enum :=  (ObjSet._NewEnum) as IEnumVariant;
  while (Enum.Next(1, TempObj, Value) = S_OK) do
  begin
    SObject := IUnknown(tempObj) as ISWBemObject;
    SProp := SObject.Properties_.Item(wmiProperty, 0);
    if VarIsNull(SProp.Get_Value) then
      result := ''
    else
    begin
      SN := SProp.Get_Value;
      result :=  SN;
    end;
  end;
  except // Trap any exceptions (Not having WMI installed will cause one!)
   on exception do
    result := '';
   end;
end;

procedure TForm4.Button1Click(Sender: TObject);
var
x:string;
Y:string;

begin


    X:=GetWMIstring('','Win32_BIOS','SerialNumber');
    Y:=GetWMIstring('','Win32_DiskDrive"','SerialNumber')     ;

    ShowMessage(x+';'+y);
end;

end.

*请有人更正我的代码或给我另一个想法最诚挚的问候*

Answer 1

您的代码不起作用，因为您在 WMI 类名中传递了双引号。

更改此代码

GetWMIstring('','Win32_DiskDrive"','SerialNumber');

至此

GetWMIstring('','Win32_DiskDrive','SerialNumber');

顺便说一句，如果您遵循此问题 How can I improve the WMI performance using delphi? 的答案的建议，您可以大大改进您的 WMI 函数 (GetWMIstring) .

尝试此示例(此代码使用后期绑定(bind)，不需要 WbemScripting_TLB 单元)

  uses
      ActiveX,
      ComObj;

    var
      FSWbemLocator : OLEVariant;
      FWMIService   : OLEVariant;

    function  GetWMIstring(const WMIClass, WMIProperty:string): string;
    const
      wbemFlagForwardOnly = $00000020;
    var
      FWbemObjectSet: OLEVariant;
      FWbemObject   : OLEVariant;
      oEnum         : IEnumvariant;
      iValue        : LongWord;
    begin;
      Result:='';
      FWbemObjectSet:= FWMIService.ExecQuery(Format('Select %s from %s',[WMIProperty, WMIClass]),'WQL',wbemFlagForwardOnly);
      oEnum         := IUnknown(FWbemObjectSet._NewEnum) as IEnumVariant;
      if oEnum.Next(1, FWbemObject, iValue) = 0 then

  if not VarIsNull(FWbemObject.Properties_.Item(WMIProperty).Value) then

     Result:=FWbemObject.Properties_.Item(WMIProperty).Value;

    FWbemObject:=Unassigned;
    end;

    procedure TForm4.Button1Click(Sender: TObject);
    var
      x:string;
      Y:string;
    begin
      FSWbemLocator := CreateOleObject('WbemScripting.SWbemLocator');
      FWMIService   := FSWbemLocator.ConnectServer('localhost', 'root\CIMV2', '', '');

      X:=GetWMIstring('Win32_BIOS','SerialNumber');
      Y:=GetWMIstring('Win32_PhysicalMedia','SerialNumber');

      ShowMessage(x+';'+y);
    end;