C# – How to run a batch script after installation is finished

This is a common question. I don't do it with just a custom action. The only way I know, is to modify the .msi after it has been generated. I run a Javascript script as a post-build event to do exactly that. It inserts a new dialog in the installer wizard, with a checkbox that says "Launch Application Foo?". And then there is a custom action to run the app, if the checkbox is checked.

It appears as the last screen in the install Wizard sequence. Looks like this:

This is the script I use to modify the MSI:

// EnableLaunchApplication.js <msi-file>
// Performs a post-build fixup of an msi to launch a specific file when the install has completed

// Configurable values
var checkboxChecked = true;                     // Is the checkbox on the finished dialog checked by default?
var checkboxText = "Launch [ProductName]";      // Text for the checkbox on the finished dialog
var filename = "WindowsApplication1.exe";       // The name of the executable to launch - change this to match the file you want to launch at the end of your setup

// Constant values from Windows Installer
var msiOpenDatabaseModeTransact = 1;

var msiViewModifyInsert         = 1;
var msiViewModifyUpdate         = 2;
var msiViewModifyAssign         = 3;
var msiViewModifyReplace        = 4;
var msiViewModifyDelete         = 6;

if (WScript.Arguments.Length != 1)
{
        WScript.StdErr.WriteLine(WScript.ScriptName + " file");
        WScript.Quit(1);
}

var filespec = WScript.Arguments(0);
var installer = WScript.CreateObject("WindowsInstaller.Installer");
var database = installer.OpenDatabase(filespec, msiOpenDatabaseModeTransact);

var sql;
var view;
var record;

try
{
        var fileId = FindFileIdentifier(database, filename);
        if (!fileId)
                throw "Unable to find '" + filename + "' in File table";

        WScript.Echo("Updating the Control table...");
        // Modify the Control_Next of BannerBmp control to point to the new CheckBox
        sql = "SELECT `Dialog_`, `Control`, `Type`, `X`, `Y`, `Width`, `Height`, `Attributes`, `Property`, `Text`, `Control_Next`, `Help` FROM `Control` WHERE `Dialog_`='FinishedForm' AND `Control`='BannerBmp'";
        view = database.OpenView(sql);
        view.Execute();
        record = view.Fetch();
        record.StringData(11) = "CheckboxLaunch";
        view.Modify(msiViewModifyReplace, record);
        view.Close();

        // Insert the new CheckBox control
        sql = "INSERT INTO `Control` (`Dialog_`, `Control`, `Type`, `X`, `Y`, `Width`, `Height`, `Attributes`, `Property`, `Text`, `Control_Next`, `Help`) VALUES ('FinishedForm', 'CheckboxLaunch', 'CheckBox', '9', '201', '343', '12', '3', 'LAUNCHAPP', '{\\VSI_MS_Sans_Serif13.0_0_0}" + checkboxText + "', 'CloseButton', '|')";
        view = database.OpenView(sql);
        view.Execute();
        view.Close();

        WScript.Echo("Updating the ControlEvent table...");
        // Modify the Order of the EndDialog event of the FinishedForm to 1
        sql = "SELECT `Dialog_`, `Control_`, `Event`, `Argument`, `Condition`, `Ordering` FROM `ControlEvent` WHERE `Dialog_`='FinishedForm' AND `Event`='EndDialog'";
        view = database.OpenView(sql);
        view.Execute();
        record = view.Fetch();
        record.IntegerData(6) = 1;
        view.Modify(msiViewModifyReplace, record);
        view.Close();

        // Insert the Event to launch the application
        sql = "INSERT INTO `ControlEvent` (`Dialog_`, `Control_`, `Event`, `Argument`, `Condition`, `Ordering`) VALUES ('FinishedForm', 'CloseButton', 'DoAction', 'VSDCA_Launch', 'LAUNCHAPP=1', '0')";
        view = database.OpenView(sql);
        view.Execute();
        view.Close();

        WScript.Echo("Updating the CustomAction table...");
        // Insert the custom action to launch the application when finished
        sql = "INSERT INTO `CustomAction` (`Action`, `Type`, `Source`, `Target`) VALUES ('VSDCA_Launch', '210', '" + fileId + "', '')";
        view = database.OpenView(sql);
        view.Execute();
        view.Close();

        if (checkboxChecked)
        {
                WScript.Echo("Updating the Property table...");
                // Set the default value of the CheckBox
                sql = "INSERT INTO `Property` (`Property`, `Value`) VALUES ('LAUNCHAPP', '1')";
                view = database.OpenView(sql);
                view.Execute();
                view.Close();
        }

        database.Commit();
}
catch(e)
{
        WScript.StdErr.WriteLine(e);
        WScript.Quit(1);
}

function FindFileIdentifier(database, fileName)
{
        // First, try to find the exact file name
        var sql = "SELECT `File` FROM `File` WHERE `FileName`='" + fileName + "'";
        var view = database.OpenView(sql);
        view.Execute();
        var record = view.Fetch();
        if (record)
        {
                var value = record.StringData(1);
                view.Close();
                return value;
        }
        view.Close();

        // The file may be in SFN|LFN format.  Look for a filename in this case next
        sql = "SELECT `File`, `FileName` FROM `File`";
        view = database.OpenView(sql);
        view.Execute();
        record = view.Fetch();
        while (record)
        {
                if (StringEndsWith(record.StringData(2), "|" + fileName))
                {
                        var value = record.StringData(1);
                        view.Close();
                        return value;
                }

                record = view.Fetch();
        }
        view.Close();
}

function StringEndsWith(str, value)
{
        if (str.length < value.length)
                return false;

        return (str.indexOf(value, str.length - value.length) != -1);
}

I originally got this from Aaron Stebner's blog, and then modified it.

Save that Javascript file to the project directory (same dir as contains .vdproj), name it ModifyMsiToEnableLaunchApplication.js . For each unique setup project, you need to modify that script and put the proper exe name into it. And then, you need to set the post-build event in the Setup project to be this:

cscript.exe "$(ProjectDir)ModifyMsiToEnableLaunchApplication.js" "$(BuiltOuputPath)"

Be sure to type the name of the macro $(BuiltOuputPath) correctly. The word Ouput is misspelled by Microsoft, and Built is not spelled Build !

That oughtta do it.

See also: this modification which does not include the "run Foo.exe" checkbox on UNINSTALL.

You can either create a js custom dialog described here: Run exe after msi installation?

or you can make a custom action at commit that calls [TARGETDIR]\YourApp.exe