private void RemovePropertyHandler()
{
#if x64
// On 64-bit machines, remove the 32-bit property handler, as we set up both
using (RegistryKey handlers = RegistryExtensions.OpenBaseKey(RegistryHive.LocalMachine, RegistryExtensions.RegistryHiveType.X86).
OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\PropertySystem\PropertyHandlers", true))
{
bool delete = false;
using (RegistryKey handler = handlers.OpenSubKey(Name, true))
{
if (handler != null)
{
if (handler.GetValueNames().Contains(ChainedValueName))
{
var temp = handler.GetValue(ChainedValueName);
handler.SetValue(null, temp);
handler.DeleteValue(ChainedValueName);
}
else
{
// Only delete the sub key if it points to our handler
var temp = handler.GetValue(null) as string;
delete = (temp != null && temp == OurPropertyHandlerGuid32);
}
}
}
// Delete needs to happen after we have released the registry key
if (delete)
{
handlers.DeleteSubKey(Name);
}
}
#endif
// Now, remove the main handler extension key, which is 32- or 64-bit, depending on how we were built
// The 32-bit and 64-bit values of these are separate and isolated on 64-bit Windows,
// the 32-bit value being under SOFTWARE\Wow6432Node. Thus a 64-bit manager is needed to set up a 64-bit handler
using (RegistryKey handlers = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\PropertySystem\PropertyHandlers", true))
{
if (PropertyHandlerState == HandlerState.Ours)
{
handlers.DeleteSubKey(Name);
this.RecordPropertyHandler(HandlerState.None, null, null);
}
else if (PropertyHandlerState == HandlerState.Chained)
{
using (RegistryKey handler = handlers.OpenSubKey(Name, true))
{
handler.SetValue(null, PropertyHandlerGuid);
handler.DeleteValue(ChainedValueName);
this.RecordPropertyHandler(HandlerState.Foreign, PropertyHandlerGuid, PropertyHandlerTitle);
}
}
}
}
// Temporary code to support MainWindow.CheckForBlockedExtensions()
//public bool IsPropertyHandlerBlocked()
//{
// bool result = false;
// if (PropertyHandlerState == HandlerState.Foreign)
// {
// AddPropertyHandler();
// result = PropertyHandlerTest.WindowsIgnoresOurPropertyHandler(Name);
// RemovePropertyHandler();
// }
// return result;
//}
private void AddPropertyHandler()
{
#if x64
// On 64-bit machines, set up the 32-bit property handler, so that 32-bit applications can also access our properties
using (RegistryKey handlers = RegistryExtensions.OpenBaseKey(RegistryHive.LocalMachine, RegistryExtensions.RegistryHiveType.X86).
OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\PropertySystem\PropertyHandlers", true))
{
using (RegistryKey handler = handlers.CreateSubKey(Name))
{
if (PropertyHandlerState == HandlerState.None)
{
var temp = handler.GetValue(null);
// In the case where there is no 64-bit handler, but there is a 32-bit handler, leave it alone
if (temp == null)
{
handler.SetValue(null, OurPropertyHandlerGuid32);
}
}
else // Foreign
{
var temp = handler.GetValue(null);
handler.SetValue(null, OurPropertyHandlerGuid32);
if (temp != null)
{
handler.SetValue(ChainedValueName, temp);
}
}
}
}
#endif
// Now, add the main handler extension key, which is 32- or 64-bit, depending on how we were built
// The 32-bit and 64-bit values of these are separate and isolated on 64-bit Windows,
// the 32-bit value being under SOFTWARE\Wow6432Node. Thus a 64-bit manager is needed to set up a 64-bit handler
using (RegistryKey handlers = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\PropertySystem\PropertyHandlers", true))
{
using (RegistryKey handler = handlers.CreateSubKey(Name))
{
if (PropertyHandlerState == HandlerState.None)
{
handler.SetValue(null, OurPropertyHandlerGuid);
this.RecordPropertyHandler(HandlerState.Ours, null, null);
}
else // Foreign
{
handler.SetValue(null, OurPropertyHandlerGuid);
handler.SetValue(ChainedValueName, PropertyHandlerGuid);
this.RecordPropertyHandler(HandlerState.Chained, PropertyHandlerGuid, PropertyHandlerTitle);
}
}
}
}
// Check to see if the registry entries are down level i.e. 1.3 or 1.4, and so need refreshing
public bool IsRefreshRequired()
{
// Find the key for the extension in HKEY_CLASSES_ROOT
using (RegistryKey target = GetHKCRProfileKey(true))
{
// Refresh is required if old school FullDetails value is present
if (target != null && target.GetValue(FullDetailsValueName) != null)
{
return(true);
}
}
#if x64
// On 64-bit machines, check that we have a 32-bit property handler, as we now set up both
using (RegistryKey handlers = RegistryExtensions.OpenBaseKey(RegistryHive.LocalMachine, RegistryExtensions.RegistryHiveType.X86).
OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\PropertySystem\PropertyHandlers", true))
{
using (RegistryKey handler = handlers.OpenSubKey(Name, false))
{
// It is important to get the criteria right here, as we don't want to
// return a positive unless removing the handler and setting it up again
// will resolve the situation
// If there is no handler, refresh is required
if (handler == null || handler.GetValue(null) == null)
{
return(true);
}
// Also refresh if we are chained, and no original property handler is recorded (even if null)
else if (PropertyHandlerState == HandlerState.Chained && !handler.GetValueNames().Contains(ChainedValueName))
{
return(true);
}
}
}
#endif
return(false);
}
public void RemoveHandlerFromExtension()
{
if (!IsElevated)
{
throw new AssocMgrException
{
Description = LocalizedMessages.AdminPrivilegesNeeded,
Exception = null,
ErrorCode = WindowsErrorCodes.ERROR_ACCESS_DENIED
}
}
;
if (PropertyHandlerState != HandlerState.Ours && PropertyHandlerState != HandlerState.Chained)
{
return;
}
// Now find the key for the extension in HKEY_CLASSES_ROOT
using (RegistryKey target = GetHKCRProfileKey(true))
{
// Tolerate the case where the extension has been removed since we set up a handler for it
// We still do this even though no longer write entries here so as to be sure to clean up after earlier versions,
// and to restore pre-existing entries if we had to hide them
if (target != null)
{
RemoveProgidRegistryEntries(target);
}
}
// Now go after the settings in SystemFileAssociations
// We may have created the key for the extension, but we can't tell, so we just remove the values
using (RegistryKey target = GetSystemFileAssociationsProfileKey(true))
{
if (target != null)
{
RemoveProgidRegistryEntries(target);
}
}
#if x64
// On 64-bit machines, remove the 32-bit property handler, as we set up both
using (RegistryKey handlers = RegistryExtensions.OpenBaseKey(RegistryHive.LocalMachine, RegistryExtensions.RegistryHiveType.X86).
OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\PropertySystem\PropertyHandlers", true))
{
bool delete = false;
using (RegistryKey handler = handlers.OpenSubKey(Name, true))
{
if (handler != null)
{
if (handler.GetValueNames().Contains(ChainedValueName))
{
var temp = handler.GetValue(ChainedValueName);
handler.SetValue(null, temp);
handler.DeleteValue(ChainedValueName);
}
else
{
// Only delete the sub key if it points to our handler
var temp = handler.GetValue(null) as string;
delete = (temp != null && temp == OurPropertyHandlerGuid32);
}
}
}
// Delete needs to happen after we have released the registry key
if (delete)
{
handlers.DeleteSubKey(Name);
}
}
#endif
// Now, remove the main handler extension key, which is 32- or 64-bit, depending on how we were built
// The 32-bit and 64-bit values of these are separate and isolated on 64-bit Windows,
// the 32-bit value being under SOFTWARE\Wow6432Node. Thus a 64-bit manager is needed to set up a 64-bit handler
using (RegistryKey handlers = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\PropertySystem\PropertyHandlers", true))
{
if (PropertyHandlerState == HandlerState.Ours)
{
handlers.DeleteSubKey(Name);
this.RecordPropertyHandler(HandlerState.None, null, null);
this.Profile = null;
}
else // Chained
{
using (RegistryKey handler = handlers.OpenSubKey(Name, true))
{
handler.SetValue(null, PropertyHandlerGuid);
handler.DeleteValue(ChainedValueName);
this.RecordPropertyHandler(HandlerState.Foreign, PropertyHandlerGuid, PropertyHandlerTitle);
this.Profile = null;
}
}
}
State.HasChanged = true;
}
// Setup the registry entries required when an extension is given our handler
public void SetupHandlerForExtension(Profile selectedProfile, bool createMergedProfile)
{
if (!IsElevated)
{
throw new AssocMgrException
{
Description = LocalizedMessages.AdminPrivilegesNeeded,
Exception = null,
ErrorCode = WindowsErrorCodes.ERROR_ACCESS_DENIED
}
}
;
if (PropertyHandlerState != HandlerState.None && PropertyHandlerState != HandlerState.Foreign)
{
throw new AssocMgrException
{
Description = String.Format(LocalizedMessages.ExtensionAlreadyHasHandler, Name),
Exception = null,
ErrorCode = WindowsErrorCodes.ERROR_INVALID_PARAMETER
}
}
;
Profile profile;
// Work out what profile to set up
if (PropertyHandlerState == HandlerState.None || !createMergedProfile)
{
profile = selectedProfile;
}
else
{
// We use a custom profile with the same name as the extension
profile = State.CustomProfiles.FirstOrDefault(p => p.Name == Name);
// If it doesn't already exist, create it
if (profile == null)
{
profile = new Profile {
Name = this.Name, State = this.State
};
State.CustomProfiles.Add(profile);
}
// If we're recycling the profile, clone it to preserve its original values
else if (profile == selectedProfile)
{
selectedProfile = selectedProfile.CreateClone();
}
}
// Find the key for the extension in HKEY_CLASSES_ROOT
using (RegistryKey target = GetHKCRProfileKey(true))
{
// We used to place entries on this key, but no longer do, because such keys can be shared,
// and we only want to affect a specific extension
// We still have to hide any existing entries, because otherwise they would take priority, but fortunately they do not often occur
// If there are entries, and we are merging, we read them into the new profile, in case this is the only place they occur
if (PropertyHandlerState == HandlerState.Foreign)
{
GetAndHidePreExistingProgidRegistryEntries(target, createMergedProfile ? profile : null);
}
}
// Now we only update the extension specific area
using (RegistryKey target = GetSystemFileAssociationsProfileKey(true))
{
if (PropertyHandlerState == HandlerState.Foreign)
{
if (createMergedProfile)
{
GetAndHidePreExistingProgidRegistryEntries(target, profile);
// Merge the selected profile into any entries that came with the foreign handler
profile.MergeFrom(selectedProfile);
}
else
{
GetAndHidePreExistingProgidRegistryEntries(target, null);
}
}
SetupProgidRegistryEntries(target, profile);
}
if (PropertyHandlerState == HandlerState.Foreign)
{
// Write the updated custom profile information back to the store
State.StoreUpdatedProfile(profile);
}
#if x64
// On 64-bit machines, set up the 32-bit property handler, so that 32-bit applications can also access our properties
using (RegistryKey handlers = RegistryExtensions.OpenBaseKey(RegistryHive.LocalMachine, RegistryExtensions.RegistryHiveType.X86).
OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\PropertySystem\PropertyHandlers", true))
{
using (RegistryKey handler = handlers.CreateSubKey(Name))
{
if (PropertyHandlerState == HandlerState.None)
{
var temp = handler.GetValue(null);
// In the case where there is no 64-bit handler, but there is a 32-bit handler, leave it alone
if (temp == null)
{
handler.SetValue(null, OurPropertyHandlerGuid32);
}
}
else // Foreign
{
var temp = handler.GetValue(null);
handler.SetValue(null, OurPropertyHandlerGuid32);
if (temp != null)
{
handler.SetValue(ChainedValueName, temp);
}
}
}
}
#endif
// Now, add the main handler extension key, which is 32- or 64-bit, depending on how we were built
// The 32-bit and 64-bit values of these are separate and isolated on 64-bit Windows,
// the 32-bit value being under SOFTWARE\Wow6432Node. Thus a 64-bit manager is needed to set up a 64-bit handler
using (RegistryKey handlers = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\PropertySystem\PropertyHandlers", true))
{
using (RegistryKey handler = handlers.CreateSubKey(Name))
{
if (PropertyHandlerState == HandlerState.None)
{
handler.SetValue(null, OurPropertyHandlerGuid);
this.RecordPropertyHandler(HandlerState.Ours, null, null);
}
else // Foreign
{
handler.SetValue(null, OurPropertyHandlerGuid);
handler.SetValue(ChainedValueName, PropertyHandlerGuid);
this.RecordPropertyHandler(HandlerState.Chained, PropertyHandlerGuid, PropertyHandlerTitle);
}
}
}
this.Profile = profile;
State.HasChanged = true;
}
