/// <summary>
/// Load shell commands for applications registered for this extension
/// </summary>
/// <param name="extension"></param>
private void LoadApplicationShellCommands(string extension)
{
// see if we've already loaded commands for this extension
if (m_extensionApplications.GetValues(extension) != null)
{
return;
}
var apps = new HashSet <string>(StringComparer.OrdinalIgnoreCase);
RegistryKey regKey = Registry.CurrentUser.OpenSubKey(string.Concat(@"Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\", extension, @"\OpenWithList"));
if ((regKey != null) && (regKey.ValueCount > 0))
{
foreach (string name in regKey.GetValueNames())
{
string value;
if (name.Equals("MRUList"))
{
continue;
}
if (regKey.GetValueKind(name) != RegistryValueKind.String)
{
continue;
}
value = (string)regKey.GetValue(name, string.Empty);
if (value.Equals(string.Empty))
{
continue;
}
apps.Add(value);
}
}
string[] subKeys = RegistryHelper.GetSubKeyList(Registry.ClassesRoot, string.Concat(extension, @"\OpenWithList"));
apps.AddValues(subKeys);
if (apps.Count == 0)
{
m_extensionApplications.Add(extension, string.Empty);
return;
}
// look up shell command for each potential app
foreach (string app in apps)
{
ShellCommand command;
string applicationName;
string applicationFullName = null;
applicationName = app.ToLowerInvariant();
if (applicationName.Equals(string.Empty))
{
continue;
}
// duplicate?
if ((m_extensionApplications[extension] != null) && m_extensionApplications[extension].Contains(applicationName))
{
continue;
}
m_extensionApplications.Add(extension, applicationName);
// check if commands for this app were already loaded
if (m_applicationCommands.ContainsKey(applicationName))
{
continue;
}
command = ShellCommands.ApplicationOpenCommand(applicationName);
if (command == null)
{
continue;
}
m_applicationCommands.Add(applicationName, command);
if (ApplicationFullPaths.ContainsKey(applicationName))
{
continue;
}
// search for app in registry
applicationFullName = RegistryHelper.StringValueFromRegKey(Registry.LocalMachine, string.Concat(@"SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\", applicationName), null);
if (applicationFullName != null)
{
ApplicationFullPaths.Add(applicationName, applicationFullName.ToLowerInvariant());
continue;
}
// look in command
applicationFullName = command.GetApplication();
if (applicationFullName != null)
{
ApplicationFullPaths.Add(applicationName, applicationFullName.ToLowerInvariant());
continue;
}
}
return;
}
/// <summary>
/// Load shell commands for progids registered for this extension
/// </summary>
/// <param name="extension"></param>
private void LoadProgIdShellCommands(string extension)
{
// see if we've already loaded commands for this extension
if (m_extensionProgIds[extension] != null)
{
return;
}
var progIds = new HashSet <string>(StringComparer.OrdinalIgnoreCase);
// first search HKCU explorer registered file extensions
var subKeys = RegistryHelper.GetValueNames(Registry.CurrentUser, string.Concat(@"Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\", extension, @"\OpenWithProgIds"));
progIds.AddValues(subKeys);
// check HKCR registered file extensions
subKeys = RegistryHelper.GetValueNames(Registry.ClassesRoot, string.Concat(extension, @"\OpenWithProgids"));
progIds.AddValues(subKeys);
if (progIds.Count == 0)
{
m_extensionProgIds.Add(extension, string.Empty);
return;
}
// look up shell command for each potential progid
foreach (string progId in progIds)
{
ShellCommand command;
bool foundApp = false;
string app = null;
m_extensionProgIds.Add(extension, progId);
if (m_progIdCommands.ContainsKey(progId))
{
// commands for this progId were already loaded
continue;
}
command = ShellCommands.ProgIdOpenCommand(progId);
if (command == null)
{
continue;
}
if (!m_progIdApplications.ContainsKey(progId))
{
// find application for this progId
app = command.GetApplication();
if (app != null)
{
FileInfo fi = new FileInfo(app);
if (fi.Exists)
{
app = fi.FullName.ToLowerInvariant();
foundApp = true;
}
if (!foundApp)
{
// search for app in registry
app = RegistryHelper.StringValueFromRegKey(Registry.LocalMachine, string.Concat(@"SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\", app), null);
if (app == null)
{
// now do a brute force search on the hard disk
app = FileHelper.FindApplication(command.GetApplication(), true);
if (app == null)
{
continue;
}
}
app = app.ToLowerInvariant();
foundApp = true;
}
}
if (foundApp)
{
m_progIdApplications.Add(progId, app);
}
}
m_progIdCommands.Add(progId, command);
}
return;
}
