Question

我正在尝试使用此代码卸载以前的版本（可选，如果已安装）并从控制面板卸载静默：

#define AppId "Program158"

[code]

procedure ChangeUninstallString;
var
  sUnInstPath: String;
  sUnInstallString: String;
begin
  sUnInstPath := ExpandConstant('Software\Microsoft\Windows\CurrentVersion\Uninstall\{#emit SetupSetting("AppId")}_is1');
  sUnInstallString := '';
  if not RegQueryStringValue(HKLM, sUnInstPath, 'UninstallString', sUnInstallString) then begin
    RegQueryStringValue(HKCU, sUnInstPath, 'UninstallString', sUnInstallString);
    RegWriteStringValue(HKCU, sUnInstPath, 'UninstallString', sUnInstallString + '/SILENT');
  end
  else begin
    RegWriteStringValue(HKLM, sUnInstPath, 'UninstallString', sUnInstallString + '/SILENT');
  end;
end;

procedure CurStepChanged(CurStep: TSetupStep);
begin
  if CurStep=ssPostInstall then begin
   ChangeUninstallString;
  end;
end;

function GetUninstallString: string;
var
  sUnInstPath: string;
  sUnInstallString: String;
begin
  Result := '';
  sUnInstPath := ExpandConstant('Software\Microsoft\Windows\CurrentVersion\Uninstall\Program156_is1'); { Your App GUID/ID }
  sUnInstallString := '';
  if not RegQueryStringValue(HKLM, sUnInstPath, 'UninstallString', sUnInstallString) then
    RegQueryStringValue(HKCU, sUnInstPath, 'UninstallString', sUnInstallString);
  Result := sUnInstallString;
end;

function IsUpgrade: Boolean;
begin
  Result := (GetUninstallString() <> '');
end;

function InitializeSetup(): Boolean;
var
  V: Integer;
  iResultCode: Integer;
  sUnInstallString: string;
begin
  Result := True; { in case when no previous version is found }
  if RegValueExists(HKEY_LOCAL_MACHINE,'Software\Microsoft\Windows\CurrentVersion\Uninstall\Program156_is1', 'UninstallString') then  { Your App GUID/ID }
  begin
    V := MsgBox(ExpandConstant('Hey! An old version of app was detected. Do you want to uninstall it?'), mbInformation, MB_YESNO); { Custom Message if App installed }
    if V = IDYES then
    begin
      sUnInstallString := GetUninstallString();
      sUnInstallString :=  RemoveQuotes(sUnInstallString);
      Exec(ExpandConstant(sUnInstallString), '', '', SW_SHOW, ewWaitUntilTerminated, iResultCode);
      Result := True; { if you want to proceed after uninstall }
      { Exit; //if you want to quit after uninstall }
    end
    else
      Result := False; { when older version present and not uninstalled }
  end;
end;

如果同时使用这两个想法，则此代码无法正常工作。它只有在我使用代码检测以前的版本并且卸载程序运行时才能正常工作。如果我同时使用这两个想法（所有这些代码），如果我选择卸载我的程序的先前版本，则卸载程序不会运行。

如何同时正确使用这两个代码？

Inno Setup - 正确卸载以前的版本

0 个答案: