Inno Setup Drive Selection Without Folder

编译时候不成功，跟踪了一下，发现是字符问题。





**************** Sample Code



* -- Sample Code for Inno 5.1.9

#define _AppDir_ "MyAppName"





[Setup]

AppName=My Program

AppVerName=My Program version 1.5

DefaultDirName={#_appdir_}

DefaultGroupName=My Program

Compression=lzma

SolidCompression=true

DisableProgramGroupPage=true

UsePreviousGroup=false

ShowLanguageDialog=no

OutputBaseFilename=drivesOnly

OutputDir=output





[Files]

Source: feature.txt; DestDir: {app}





[Dirs]

; Create Sub directories required

Name: {app}/backup

Name: {app}/temp

Name: {app}/tutorial

Name: {app}/images



[Messages]

SelectDirBrowseLabel=To continue, click Next. If you would like to select a different drive, choose from the list.



[Code]

var

	// combo box for drives

	cbDrive : TComboBox ;

	// array fo string that keep the drive letters

	DrvLetters: array of String;

function GetDriveType( lpDisk: String ): Integer;

external '[email protected] stdcall';



function GetLogicalDriveStrings( nLenDrives: LongInt; lpDrives: String ): Integer;

external '[email protected] stdcall';

const

  DRIVE_UNKNOWN = 0; // The drive type cannot be determined.

  DRIVE_NO_ROOT_DIR = 1; // The root path is invalid. For example, no volume is mounted at the path.

  DRIVE_REMOVABLE = 2; // The disk can be removed from the drive.

  DRIVE_FIXED = 3; // The disk cannot be removed from the drive.

  DRIVE_REMOTE = 4; // The drive is a remote (network) drive.

  DRIVE_CDROM = 5; // The drive is a CD-ROM drive.

  DRIVE_RAMDISK = 6; // The drive is a RAM disk.


// function to convert disk type to string

function DriveTypeString( dtype: Integer ): String ;

begin

  case dtype of

    DRIVE_NO_ROOT_DIR : Result := 'Root path invalid';

    DRIVE_REMOVABLE : Result := 'Removable';

    DRIVE_FIXED : Result := 'Fixed';

    DRIVE_REMOTE : Result := 'Network';

    DRIVE_CDROM : Result := 'CD-ROM';

    DRIVE_RAMDISK : Result := 'Ram disk';
  else
    Result := 'Unknown';

  end;

end;


// change folder accordigly to the drive letter selected

procedure cbDriveOnClick(Sender: TObject);

begin

	WizardForm.DirEdit.Text := DrvLetters[ cbDrive.ItemIndex ] + UpperCase(ExpandConstant('{#_AppDir_}'));

end;


procedure FillCombo();
var

  n: Integer;

  drivesletters: String; lenletters: Integer;

  drive: String;

  disktype, posnull: Integer;
  sd: String;

begin

  //get the system drive

  sd := UpperCase(ExpandConstant('{sd}'));

  //get all drives letters of system

  drivesletters := StringOfChar( ' ', 64 );

  lenletters := GetLogicalDriveStrings( 63, drivesletters );

  SetLength( drivesletters , lenletters );

  drive := '';

  n := 0;

  while ( (Length(drivesletters) > 0) ) do

  begin

    posnull := Pos( #0, drivesletters );

  	if posnull > 0 then

  	begin

         drive:= UpperCase( Copy( drivesletters, 1, posnull - 1 ) );
      // get number type of disk
      disktype := GetDriveType( drive );
      // add it only if it is not a floppy
      if ( not ( disktype = DRIVE_REMOVABLE ) ) then
      begin
	cbDrive.Items.Add( drive + '   [' + DriveTypeString( disktype ) + ']' )

        SetArrayLength(DrvLetters, N+1);

        DrvLetters[n] := drive;

       // default select C: Drive

       //if ( Copy(drive,1,2) = 'C:' ) then cbDrive.ItemIndex := n;

       // or default to system drive

        if ( Copy(drive,1,2) = sd ) then cbDrive.ItemIndex := n;
        n := n + 1;

      end

	  drivesletters := Copy( drivesletters, posnull+1, Length(drivesletters));
  	end
  end;

  cbDriveOnClick( cbDrive );

end;



procedure InitializeWizard();

begin
	// create the combo box for drives
	cbDrive:= TComboBox.Create(WizardForm.SelectDirPage);

    with cbDrive do

    begin
      Parent := WizardForm.DirEdit.Parent;

      Left := WizardForm.DirEdit.Left;
      Top := WizardForm.DirEdit.Top + WizardForm.DirEdit.Height * 2;

      Width := WizardForm.DirEdit.Width;
      Style := csDropDownList;
    end;
	// hide the Browse button
	WizardForm.DirBrowseButton.Visible := false;
	// Edit box for folder don't have to be editable
	WizardForm.DirEdit.Enabled := false;
	// fill combo box with Drives
	FillCombo;
	// set the event on combo change

	cbDrive.OnClick := @cbDriveOnClick ;

end;


procedure MyAfterInstall2(FileName: String);
begin
  MsgBox('Just installed ' + FileName + ' as ' + CurrentFileName + '.', mbInformation, MB_OK);

end;