/// <summary>
/// Lists applications installed on the system
/// </summary>
/// <returns>ArrayList of AppInstallInfo instances</returns>
public static ArrayList GetInstalledApps(bool reload = false)
{
if (!reload && SystemAppCatalog != null) return SystemAppCatalog;
try
{
SystemAppCatalog = new ArrayList();
string uninstallKey = @"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall";
string uninstallKey32 = @"SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall";
for (var i = 0; i < 4; i++)
{
// We're doing four passes: first pass from LocalMachine hive, second pass from CurrentUser
// Third pass: LocalMachine Wow6432Node, Fourth pass: CurrentUser Wow6432Node
// Normally most apps should be listed in LocalMachine, but some apps such as Torch (web browser)
// for some reason only appear in CurrentUser
// Try it, if it fails, continue to the next pass
try
{
RegistryKey rk;
// Set folder for each pass
if (i == 1) rk = Registry.CurrentUser.OpenSubKey(uninstallKey);
else if (i == 2) rk = Registry.LocalMachine.OpenSubKey(uninstallKey32);
else if (i == 3) rk = Registry.CurrentUser.OpenSubKey(uninstallKey32);
else rk = Registry.LocalMachine.OpenSubKey(uninstallKey);
foreach (string skName in rk.GetSubKeyNames())
{
using (RegistryKey sk = rk.OpenSubKey(skName))
{
try
{
if (sk.GetValueKind("DisplayName") == RegistryValueKind.String)
{
AppInstallInfo app = new AppInstallInfo("");
app.KeyName = skName;
app.DisplayName = (string)sk.GetValue("DisplayName");// +skName;
app.DisplayVersion = "";
// Attempt to get the version
try
{
app.DisplayVersion = (string)sk.GetValue("DisplayVersion");
}
catch {
app.DisplayVersion = "";
}
// If there is a tag for the major version number
var version = -1;
try
{
if (sk.GetValueKind("MajorVersion") == RegistryValueKind.String)
version = int.Parse((string)sk.GetValue("MajorVersion"));
else
version = (int)sk.GetValue("MajorVersion");
}
catch { }
if (version == -1)
{
try
{
if (sk.GetValueKind("VersionMajor") == RegistryValueKind.String)
version = int.Parse((string)sk.GetValue("VersionMajor"));
else
version = (int)sk.GetValue("VersionMajor");
}
catch { }
}
// Attempt to figure out the version by looking at DisplayVersion
if (version == -1 && app.DisplayVersion != null)
{
var parts = app.DisplayVersion.Split('.');
if (parts.Length > 0)
{
var possibleMajorVersion = parts[0];
try
{
version = int.Parse(possibleMajorVersion);
}
catch { }
}
}
if (version == -1) version = 0;
app.MajorVersionNumber = version;
app.Supported = true;
// Is it a driver?
if (app.DisplayName.Contains("Windows Driver Package")) continue;
if (app.DisplayName.Contains("Update for Microsoft")) continue;
if (app.DisplayName.Contains("Microsoft") && app.DisplayName.Contains("MUI")) continue;
// Check whether the app is supported or not
app.CheckSupport();
// Already there?
if (!AlreadyInCatalog(app))
SystemAppCatalog.Add(app);
}
}
catch
{
//MessageBox.Show("STEP 2 " + ex.ToString());
}
}
}
}
catch
{
// Nothing, continue
//MessageBox.Show("STEP 1 "+ex.ToString() );
}
}
return SystemAppCatalog;
}
catch
{
return null;
}
}
/// <summary>
/// Checks whether given app is already listed in the catalog (checks display name + version)
/// This can occur when both 32-bit and 64-bit versions are installed on the system
/// </summary>
static bool AlreadyInCatalog(AppInstallInfo app)
{
if (SystemAppCatalog == null) return false;
foreach (AppInstallInfo inf in SystemAppCatalog)
{
if (inf.DisplayName.ToLower() == app.DisplayName.ToLower() && inf.DisplayVersion.ToLower() == app.DisplayVersion.ToLower())
return true;
}
return false;
}
