ClickOnce Install Actions

The following code class is designed to provide the ability to execute installing a Visual Studio Tools for Office (VSTO) into the ClickOnce cache.

This code would be desired for use by an MSI based installer or a utility tool.

*************************************************

using System;

using System.Configuration.Install;

using System.Diagnostics;

using System.IO;

using System.Security;

using System.Security.Permissions;

using System.Text;

namespace ClickOnceCustomActions

{

    public static class ClickOnceActions

    {

        public static bool CheckForPermission()

        {

            bool bRtn = false;

            try

            {

                SecurityPermission permission =

                    new SecurityPermission(PermissionState.Unrestricted);

                permission.Demand();

                bRtn = true;

            }

            catch (SecurityException)

            {

                throw new InstallException(

                    "You have insufficient privileges to " +

                    "install the add-in into the ClickOnce cache. " +

                    "Please contact your system administrator.");

            }

            return bRtn;

        }

        public static void InstallVSTO(string fileAbsolutePath)

        {

            string arguments = String.Format(

                        "/S /I \"{0}\"", fileAbsolutePath);

            int exitCode = ExecuteVSTOInstaller(arguments);

            if (exitCode != 0)

            {

                string message = null;

                switch (exitCode)

                {

                    case -300:

                        message = String.Format(

                            "The Visual Studio Tools for Office solution " +

                            "was signed by an untrusted publisher and as " +

                            "such cannot be installed automatically. " +

                            "Please use your browser to navigate to {0} in " +

                            "order to install the solution manually. " +

                            "You will be prompted if the solution is trusted for execution.",

                            fileAbsolutePath);

                        break;

                    default:

                        message = String.Format(

                            "The installation of the ClickOnce solution failed with exit code {0}",

                            exitCode);

                        break;

                }

                throw new InstallException(message);

            }

        }

        public static void UninstallVSTO(string fileAbsolutePath)

        {

            string arguments = String.Format(

                "/S /U \"{0}\"", fileAbsolutePath);

            ExecuteVSTOInstaller(arguments);

        }

        public static int ExecuteVSTOInstaller(string arguments)

        {

            string basePath = Environment.GetFolderPath(Environment.SpecialFolder.CommonProgramFiles);

            string subPath = @"Microsoft Shared\VSTO\9.0\VSTOInstaller.exe";

            string vstoInstallerPath = Path.Combine(basePath, subPath);

            if (File.Exists(vstoInstallerPath) == false)

            {

                throw new InstallException(

                    "The Visual Studio Tools for Office installer was not found.");

            }

            ProcessStartInfo startInfo = new ProcessStartInfo(vstoInstallerPath);

            startInfo.Arguments = arguments;

            Process process = Process.Start(startInfo);

            process.WaitForExit();

            int exitCode = process.ExitCode;

            return exitCode;

        }

    }

}