Title: Class to extract file version in a variety of formats.
Question: This class is a wrapper around the windows API call GetFileVersionInfo().
It allows access to the file version numbers and sub-numbers in a variety of ways via class properties.
Methods
-------------------
Create(const AFileName : string = '') - If AFilename='' then the currently running app name is used, else the specified ath/filename is used.
Properties
----------------------
FileName - Get current filename or Set new filename.
VerMajor - Returns the MAJOR part of the Version.
VerMinor - Returns the MINOR part of the Version.
VerRelease - Returns the RELEASE part of the Version.
VerBuild - Returns the BUILD part of the Version.
AsString - As Compressed String Form eg. '2.0.12.456'
AsStringZero - In String Zero format eg. '002.000.012.456'
AsHex - As Hex Format (16 char) eg. '00020000000C01C8'
AsHexDelim - As '-' Delimited Hex eg. '0002-0000-000C-01C8'
AsInt64 - As Int64 value eg. 562949954208200 This is useful for
storing in a database field for easy version comparisons.
Simple Example :
--------------------------
procedure TForm1.Button1Click(Sender: TObject);
var oVer : TFileVersion;
begin
oVer := TFileVersion.Create; // Use current application
label1.Caption := IntToStr(oVer.VerMajor);
label2.Caption := IntToStr(oVer.VerMinor);
label3.Caption := IntToStr(oVer.VerRelease);
label4.Caption := IntToStr(oVer.VerBuild);
label5.Caption := oVer.AsString;
label6.Caption := oVer.AsStringZero;
label7.Caption := oVer.AsHex;
label8.Caption := oVer.AsHexDelim;
label9.Caption := IntToStr(oVer.AsInt64);
oVer.Free;
end;
Answer:
unit MahFileVer;
interface
uses Windows, SysUtils, Classes, Forms,;
type
{TFileVersion Class}
TFileVersion = class(TObject)
private
FMajor,FMinor,
FRelease,FBuild : word;
FFileName : string;
procedure SetFFileName(const AValue : string);
function GetAsString : string;
function GetAsStringZero : string;
function GetAsHex : string;
function GetAsHexDelim : string;
function GetAsInt64 : Int64;
protected
procedure GetVersionInfo;
public
constructor Create(const AFileName : string = '');
// Properties
property FileName : string read FFileName write SetFFileName;
property VerMajor : word read FMajor;
property VerMinor : word read FMinor;
property VerRelease : word read FRelease;
property VerBuild : word read FBuild;
property AsString : string read GetAsString;
property AsStringZero : string read GetAsStringZero;
property AsHex : string read GetAsHex;
property AsHexDelim : string read GetAsHexDelim;
property AsInt64 : Int64 read GetAsInt64;
end;
// ------------------------------------------------------------------------
interface
// ===========================================================
// Construct Class, if AFileName is nullstring then use the
// currently executing application filenam
// ===========================================================
constructor TFileVersion.Create(const AFileName : string = '');
begin
inherited Create;
if AFileName = '' then
FFileName := ExtractFilePath(Application.ExeName) +
ExtractFileName(Application.ExeName)
else
FFileName := AFileName;
GetVersionInfo;
end;
// =============================
// Property Set methods
// =============================
procedure TFileVersion.SetFFileName(const AValue : string);
begin
FFileName := AValue;
GetVersionInfo;
end;
// ===========================
// Property Get Methods
// ===========================
function TFileVersion.GetAsString : string;
begin
Result := IntToStr(FMajor) + '.' + IntToStr(FMinor) + '.' +
IntToStr(FRelease) + '.' + IntToStr(FBuild);
end;
function TFileVersion.GetAsStringZero : string;
begin
// If any sub ver is 999 then only the last 3 digits
// are used. eg. VerBuild=25312 would use diguts 312 only
Result := FormatFloat('000',FMajor mod 1000) + '.' +
FormatFloat('000',FMinor mod 1000) + '.' +
FormatFloat('000',FRelease mod 1000) + '.' +
FormatFloat('000',FBuild mod 1000);
end;
function TFileVersion.GetAsHex : string;
begin
Result := IntToHex(FMajor,4) + IntToHex(FMinor,4) +
IntToHex(FRelease,4) + IntToHex(FBuild,4);
end;
function TFileVersion.GetAsHexDelim : string;
begin
Result := IntToHex(FMajor,4) + '-' + IntToHex(FMinor,4) + '-' +
IntToHex(FRelease,4) + '-' + IntToHex(FBuild,4);
end;
function TFileVersion.GetAsInt64 : Int64;
var iResult : Int64;
begin
iResult := FMajor;
iResult := (iResult shl 16) + FMinor;
iResult := (iResult shl 16) + FRelease;
iResult := (iResult shl 16) + FBuild;
Result := iResult;
end;
// ===================================
// Get File Version Information
// ===================================
procedure TFileVersion.GetVersionInfo;
var iVerInfoSize,iVerValueSize,iDummy : DWORD;
pVerInfo : Pointer;
rVerValue : PVSFixedFileInfo;
begin
FMajor := 0;
FMinor := 0;
FRelease := 0;
FBuild := 0;
iVerInfoSize := GetFileVersionInfoSize(PChar(FFileName),iDummy);
if iVerInfoSize 0 then begin
GetMem(pVerInfo,iVerInfoSize);
try
GetFileVersionInfo(PChar(FFileName),0,iVerInfoSize,pVerInfo);
VerQueryValue(pVerInfo,'\',Pointer(rVerValue),iVerValueSize);
with rVerValue^ do begin
FMajor := dwFileVersionMS shr 16;
FMinor := dwFileVersionMS and $FFFF;
FRelease := dwFileVersionLS shr 16;
FBuild := dwFileVersionLS and $FFFF;
end;
finally
FreeMem(pVerInfo,iVerInfoSize);
end;
end;
end;
end.