我在 InstallShield 2013 中使用自定义 InstallScript 实现了这一点。该脚本是通过 UI 序列中的自定义操作执行的,但我将它放在“SetupProgress”对话框之后,即在“执行操作”之前而不是在 CostFinalize 之后(如文档所述)。我在操作中添加了条件“未安装”。如果您按照建议的顺序放置它,它将在安装程序初始化后立即开始卸载。如果您将它移动到我所做的位置,它不会启动,直到用户单击最终的立即安装按钮。
将其置于 UI 序列中的原因是为了解决一次只有一个 msi 安装程序(或卸载程序)的问题。由于该限制,这在执行顺序中根本不起作用。
这种方法的主要缺点是,正如 Christopher 所说,这在静默安装中不起作用(也可以在 IS 文档中找到)。这是实现这一目标的官方手段。(查看:http ://helpnet.installshield.com/installshield16helplib/IHelpCustomActionMSIExec.htm )如果您可以忍受(因为静默安装通常是特殊情况),那么这很好用。
正如 Chris 所说,您无法在主 ui 运行时启动卸载程序 ui,但这对我的脚本来说不是问题,因为它添加了一个命令行开关来在没有 ui 的情况下运行卸载程序(即静默)。
我的脚本还避免了必须知道要卸载的应用程序的 guid。这是绑定到自定义操作的脚本(UninstallPriorVersions 是入口点函数):
////////////////////////////////////////////////////////////////////////////////
//
// This template script provides the code necessary to build an entry-point
// function to be called in an InstallScript custom action.
//
//
// File Name: Setup.rul
//
// Description: InstallShield script
//
////////////////////////////////////////////////////////////////////////////////
// Include Ifx.h for built-in InstallScript function prototypes, for Windows
// Installer API function prototypes and constants, and to declare code for
// the OnBegin and OnEnd events.
#include "ifx.h"
// The keyword export identifies MyFunction() as an entry-point function.
// The argument it accepts must be a handle to the Installer database.
export prototype UninstallPriorVersions(HWND);
// To Do: Declare global variables, define constants, and prototype user-
// defined and DLL functions here.
prototype NUMBER UninstallApplicationByName( STRING );
prototype NUMBER GetUninstallCmdLine( STRING, BOOL, BYREF STRING );
prototype STRING GetUninstallKey( STRING );
prototype NUMBER RegDBGetSubKeyNameContainingValue( NUMBER, STRING, STRING, STRING, BYREF STRING );
// To Do: Create a custom action for this entry-point function:
// 1. Right-click on "Custom Actions" in the Sequences/Actions view.
// 2. Select "Custom Action Wizard" from the context menu.
// 3. Proceed through the wizard and give the custom action a unique name.
// 4. Select "Run InstallScript code" for the custom action type, and in
// the next panel select "MyFunction" (or the new name of the entry-
// point function) for the source.
// 5. Click Next, accepting the default selections until the wizard
// creates the custom action.
//
// Once you have made a custom action, you must execute it in your setup by
// inserting it into a sequence or making it the result of a dialog's
// control event.
///////////////////////////////////////////////////////////////////////////////
//
// Function: UninstallPriorVersions
//
// Purpose: Uninstall prior versions of this application
//
///////////////////////////////////////////////////////////////////////////////
function UninstallPriorVersions(hMSI)
begin
UninstallApplicationByName( "The Name Of Some App" );
end;
///////////////////////////////////////////////////////////////////////////////
//
// Function: UninstallApplicationByName
//
// Purpose: Uninstall an application (without knowing the guid)
//
// Returns: (UninstCmdLine is assigned a value by referrence)
// >= ISERR_SUCCESS The function successfully got the command line.
// < ISERR_SUCCESS The function failed to get the command line.
//
///////////////////////////////////////////////////////////////////////////////
function NUMBER UninstallApplicationByName( AppName )
NUMBER nReturn;
STRING UninstCmdLine;
begin
nReturn = GetUninstallCmdLine( AppName, TRUE, UninstCmdLine );
if( nReturn < ISERR_SUCCESS ) then
return nReturn;
endif;
if( LaunchAppAndWait( "", UninstCmdLine, LAAW_OPTION_WAIT) = 0 ) then
return ISERR_SUCCESS;
else
return ISERR_SUCCESS-1;
endif;
end;
///////////////////////////////////////////////////////////////////////////////
//
// Function: GetUninstallCmdLine
//
// Purpose: Get the command line statement to uninstall an application
//
// Returns: (UninstCmdLine is assigned a value by referrence)
// >= ISERR_SUCCESS The function successfully got the command line.
// < ISERR_SUCCESS The function failed to get the command line.
//
///////////////////////////////////////////////////////////////////////////////
function NUMBER GetUninstallCmdLine( AppName, Silent, UninstCmdLine )
NUMBER nReturn;
begin
nReturn = RegDBGetUninstCmdLine ( GetUninstallKey( AppName ), UninstCmdLine );
if( nReturn < ISERR_SUCCESS ) then
return nReturn;
endif;
if( Silent && StrFind( UninstCmdLine, "MsiExec.exe" ) >= 0 )then
UninstCmdLine = UninstCmdLine + " /qn";
endif;
return nReturn;
end;
///////////////////////////////////////////////////////////////////////////////
//
// Function: GetUninstallKey
//
// Purpose: Find the uninstall key in the registry for an application looked up by name
//
// Returns: The uninstall key (i.e. the guid or a fall back value)
//
///////////////////////////////////////////////////////////////////////////////
function STRING GetUninstallKey( AppName )
STRING guid;
STRING Key64, Key32, ValueName;
begin
Key64 = "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall";
Key32 = "SOFTWARE\\Wow6432Node\\\Microsoft\\Windows\\CurrentVersion\\Uninstall";
ValueName = "DisplayName";
if( RegDBGetSubKeyNameContainingValue( HKEY_LOCAL_MACHINE, Key64, ValueName, AppName, guid ) = 0 ) then
return guid; // return 64 bit GUID
endif;
if( RegDBGetSubKeyNameContainingValue( HKEY_LOCAL_MACHINE, Key32, ValueName, AppName, guid ) = 0 ) then
return guid; // return 32 bit GUID
endif;
return AppName; // return old style uninstall key (fall back value)
end;
///////////////////////////////////////////////////////////////////////////////
//
// Function: RegDBGetSubKeyNameContainingValue
//
// Purpose: Find a registry sub key containing a given value.
// Return the NAME of the subkey (NOT the entire key path)
//
// Returns: (SubKeyName is assigned a value by referrence)
// = 0 A sub key name was found with a matching value
// != 0 Failed to find a sub key with a matching value
//
///////////////////////////////////////////////////////////////////////////////
function NUMBER RegDBGetSubKeyNameContainingValue( nRootKey, Key, ValueName, Value, SubKeyName )
STRING SearchSubKey, SubKey, svValue;
NUMBER nResult, nType, nvSize;
LIST listSubKeys;
begin
SubKeyName = "";
listSubKeys = ListCreate(STRINGLIST);
if (listSubKeys = LIST_NULL) then
MessageBox ("Unable to create necessary list.", SEVERE);
abort;
endif;
RegDBSetDefaultRoot( nRootKey );
if (RegDBQueryKey( Key, REGDB_KEYS, listSubKeys ) = 0) then
nResult = ListGetFirstString (listSubKeys, SubKey);
while (nResult != END_OF_LIST)
SearchSubKey = Key + "\\" + SubKey;
nType = REGDB_STRING;
if (RegDBGetKeyValueEx (SearchSubKey, ValueName, nType, svValue, nvSize) = 0) then
if( svValue = Value ) then
SubKeyName = SubKey;
nResult = END_OF_LIST;
endif;
endif;
if( nResult != END_OF_LIST ) then
nResult = ListGetNextString (listSubKeys, SubKey);
endif;
endwhile;
endif;
ListDestroy (listSubKeys );
if ( SubKeyName = "" ) then
return 1;
else
return 0;
endif;
end;