如何在Delphi中检索USB闪存盘的制造商序列号？
我试过这个：
function GetDiskVolSerialID(ADriveName: Char): Cardinal;
var
DiskDrive: string;
FileSystemFlags: DWORD;
VolumeSerialNumber: DWORD;
MaximumComponentLength: DWORD;
begin
DiskDrive := ADriveName + ':\';
GetVolumeInformation(PChar(DiskDrive),
nil,
0,
@VolumeSerialNumber,
MaximumComponentLength,
FileSystemFlags,
nil,
0);
Result := VolumeSerialNumber;
end;
但它没有返回正确的结果！
答案 0 :(得分：12)
opc0de，根据您的评论我将使用WMI为您提供示例。
首先，您发布的代码（使用GetVolumeInformation功能）会在格式化磁盘时返回由Windows分配的序列号。
好消息是存在两个wmi类，它们公开了一个名为SerialNumber的属性，其存储the Number allocated by the manufacturer to identify the physical media.这些类为Win32_DiskDrive和Win32_PhysicalMedia。
现在坏消息，不幸的是这个类没有直接与逻辑磁盘的字母（C，D，E，F ...）相关联，因为你必须调用另一个wmi类来查找之间的链接逻辑驱动器号和物理驱动器。
因此您必须先找到此链接以获取序列号。找到这种关联的顺序是这样的。
Win32_DiskPartition - ＆gt; Win32_LogicalDiskToPartition - ＆gt; Win32_DiskDrive
这是使用Win32_DiskDrive类获取usb序列号的代码。
program GetWMI_Info;
{$APPTYPE CONSOLE}
uses
SysUtils,
StrUtils,
ActiveX,
ComObj,
Variants;
function VarArrayToStr(const vArray: variant): string;
function _VarToStr(const V: variant): string;
var
Vt: integer;
begin
Vt := VarType(V);
case Vt of
varSmallint,
varInteger : Result := IntToStr(integer(V));
varSingle,
varDouble,
varCurrency : Result := FloatToStr(Double(V));
varDate : Result := VarToStr(V);
varOleStr : Result := WideString(V);
varBoolean : Result := VarToStr(V);
varVariant : Result := VarToStr(Variant(V));
varByte : Result := char(byte(V));
varString : Result := String(V);
varArray : Result := VarArrayToStr(Variant(V));
end;
end;
var
i : integer;
begin
Result := '[';
if (VarType(vArray) and VarArray)=0 then
Result := _VarToStr(vArray)
else
for i := VarArrayLowBound(vArray, 1) to VarArrayHighBound(vArray, 1) do
if i=VarArrayLowBound(vArray, 1) then
Result := Result+_VarToStr(vArray[i])
else
Result := Result+'|'+_VarToStr(vArray[i]);
Result:=Result+']';
end;
function VarStrNull(const V:OleVariant):string; //avoid problems with null strings
begin
Result:='';
if not VarIsNull(V) then
begin
if VarIsArray(V) then
Result:=VarArrayToStr(V)
else
Result:=VarToStr(V);
end;
end;
function GetWMIObject(const objectName: String): IDispatch; //create the Wmi instance
var
chEaten: Integer;
BindCtx: IBindCtx;
Moniker: IMoniker;
begin
OleCheck(CreateBindCtx(0, bindCtx));
OleCheck(MkParseDisplayName(BindCtx, StringToOleStr(objectName), chEaten, Moniker));
OleCheck(Moniker.BindToObject(BindCtx, nil, IDispatch, Result));
end;
function GetUsbDriveSerial(const Drive:AnsiChar):string;
var
objWMIService : OLEVariant;
colDiskDrives : OLEVariant;
colLogicalDisks: OLEVariant;
colPartitions : OLEVariant;
objDiskDrive : OLEVariant;
objPartition : OLEVariant;
objLogicalDisk : OLEVariant;
oEnumDiskDrive : IEnumvariant;
oEnumPartition : IEnumvariant;
oEnumLogical : IEnumvariant;
iValue : LongWord;
DeviceID : string;
begin;
Result:='';
objWMIService := GetWMIObject('winmgmts:\\localhost\root\CIMV2'); //Connect to the WMI
//colDiskDrives := objWMIService.ExecQuery('SELECT DeviceID,SerialNumber FROM Win32_DiskDrive WHERE InterfaceType="USB"','WQL',0);
colDiskDrives := objWMIService.ExecQuery('SELECT * FROM Win32_DiskDrive WHERE InterfaceType="USB"','WQL',0);
oEnumDiskDrive:= IUnknown(colDiskDrives._NewEnum) as IEnumVariant;
while oEnumDiskDrive.Next(1, objDiskDrive, iValue) = 0 do
begin
DeviceID := StringReplace(VarStrNull(objDiskDrive.DeviceID),'\','\\',[rfReplaceAll]); //Escape the `\` chars in the DeviceID value because the '\' is a reserved character in WMI.
colPartitions := objWMIService.ExecQuery(Format('ASSOCIATORS OF {Win32_DiskDrive.DeviceID="%s"} WHERE AssocClass = Win32_DiskDriveToDiskPartition',[DeviceID]));//link the Win32_DiskDrive class with the Win32_DiskDriveToDiskPartition class
oEnumPartition := IUnknown(colPartitions._NewEnum) as IEnumVariant;
while oEnumPartition.Next(1, objPartition, iValue) = 0 do
begin
colLogicalDisks := objWMIService.ExecQuery('ASSOCIATORS OF {Win32_DiskPartition.DeviceID="'+VarStrNull(objPartition.DeviceID)+'"} WHERE AssocClass = Win32_LogicalDiskToPartition'); //link the Win32_DiskPartition class with theWin32_LogicalDiskToPartition class.
oEnumLogical := IUnknown(colLogicalDisks._NewEnum) as IEnumVariant;
while oEnumLogical.Next(1, objLogicalDisk, iValue) = 0 do
if VarStrNull(objLogicalDisk.DeviceID)=(Drive+':') then //compare the device id
begin
Result:=VarStrNull(objDiskDrive.SerialNumber);
Exit;
end;
end;
end;
end;
begin
try
CoInitialize(nil);
try
Writeln(GetUsbDriveSerial('F'));
Readln;
finally
CoUninitialize;
end;
except
on E:Exception do
begin
Writeln(E.Classname, ':', E.Message);
Readln;
end;
end;
end.
顺便说一下，我写了一个名为WMI Delphi Code Creator的应用程序，它可以帮助你生成delphi代码，以便使用WMI访问系统信息。
<强>更新
USB磁盘的某些驱动程序不会在Win32_DiskDrive.SerialNumber属性上公开制造商序列号，因此在这种情况下，您可以从PnPDeviceID属性中提取序列号。
检查此示例代码。
{$APPTYPE CONSOLE}
uses
SysUtils,
StrUtils,
ActiveX,
ComObj,
Variants;
function VarStrNull(const V:OleVariant):string; //avoid issues with null variants
begin
Result:='';
if not VarIsNull(V) then
Result:=VarToStr(V);
end;
function GetUsbDriveSerial(const Drive:AnsiChar):string;
var
FSWbemLocator : OleVariant;
objWMIService : OLEVariant;
colDiskDrives : OLEVariant;
colLogicalDisks: OLEVariant;
colPartitions : OLEVariant;
objDiskDrive : OLEVariant;
objPartition : OLEVariant;
objLogicalDisk : OLEVariant;
oEnumDiskDrive : IEnumvariant;
oEnumPartition : IEnumvariant;
oEnumLogical : IEnumvariant;
iValue : LongWord;
DeviceID : string;
begin;
Result:='';
FSWbemLocator := CreateOleObject('WbemScripting.SWbemLocator');
objWMIService := FSWbemLocator.ConnectServer('.', 'root\CIMV2', '', '');
colDiskDrives := objWMIService.ExecQuery('SELECT * FROM Win32_DiskDrive WHERE InterfaceType="USB"','WQL',0);
oEnumDiskDrive:= IUnknown(colDiskDrives._NewEnum) as IEnumVariant;
while oEnumDiskDrive.Next(1, objDiskDrive, iValue) = 0 do
begin
DeviceID := StringReplace(VarStrNull(objDiskDrive.DeviceID),'\','\\',[rfReplaceAll]); //Escape the `\` chars in the DeviceID value because the '\' is a reserved character in WMI.
colPartitions := objWMIService.ExecQuery(Format('ASSOCIATORS OF {Win32_DiskDrive.DeviceID="%s"} WHERE AssocClass = Win32_DiskDriveToDiskPartition',[DeviceID]));//link the Win32_DiskDrive class with the Win32_DiskDriveToDiskPartition class
oEnumPartition := IUnknown(colPartitions._NewEnum) as IEnumVariant;
while oEnumPartition.Next(1, objPartition, iValue) = 0 do
begin
colLogicalDisks := objWMIService.ExecQuery('ASSOCIATORS OF {Win32_DiskPartition.DeviceID="'+VarStrNull(objPartition.DeviceID)+'"} WHERE AssocClass = Win32_LogicalDiskToPartition'); //link the Win32_DiskPartition class with theWin32_LogicalDiskToPartition class.
oEnumLogical := IUnknown(colLogicalDisks._NewEnum) as IEnumVariant;
while oEnumLogical.Next(1, objLogicalDisk, iValue) = 0 do
begin
if SameText(VarStrNull(objLogicalDisk.DeviceID),Drive+':') then //compare the device id
begin
Result:=VarStrNull(objDiskDrive.PnPDeviceID);
if AnsiStartsText('USBSTOR', Result) then
begin
iValue:=LastDelimiter('\', Result);
Result:=Copy(Result, iValue+1, Length(Result));
end;
objLogicalDisk:=Unassigned;
Exit;
end;
objLogicalDisk:=Unassigned;
end;
objPartition:=Unassigned;
end;
objDiskDrive:=Unassigned;
end;
end;
begin
try
CoInitialize(nil);
try
Writeln(GetUsbDriveSerial('F'));
Readln;
finally
CoUninitialize;
end;
except
on E:Exception do
begin
Writeln(E.Classname, ':', E.Message);
Readln;
end;
end;
end.
答案 1 :(得分：2)
您可以尝试使用组件TDiskInfo from GLib获取序列号 它不使用WMI，但在某些系统（磁盘类型）中没有检索数字 试试吧。免费。
问候。