Revit Maintaining ExternalApplication Status

[Anonymous]

I working on sample login application in Revit 

Requirement: 

- Revit tab has two Push-buttons, Login and upload

- Login: Opens a window form where one can enter username and password and get validated from API.

  I have created ExternalCommand for this login(dll) and hooked it in ExternalApplication. 

  Now, how can I keep track of logged in status, so that next time he don't have to login again?

- Also depending the logged in status I have to enable/disable upload  

[matthew_taylor]

Hi @Anonymous,

You need to look at IExternalCommandAvailability for enable/disable.

As for retaining login status? Depends on the scope. Forever = file or registry. Revit session = application singleton property. Document = parameter or extensible storage. Lots of possibilities.

[Anonymous]

Thanks for your reply,

The scope I'm looking for is 'Forever', I'm new to plugin development; can you please point me towards how I can achieve this.

Thanks again

[matthew_taylor · Accepted solution]

Hi @Anonymous,

You probably want to use the Registry then. (Well, it's a relatively easy way, at least!)

This link gives tips:

http://www.c-sharpcorner.com/UploadFile/f9f215/windows-registry/

You will likely need to read/write to the CurrentUser/HKEY_CURRENT_USER branch.

Stay away from deleting anything until you are *sure* what you are doing.

RegEdit is a good way to manually check/edit the registry, and also allows you to back it up.

[Anonymous]

Thank you for the Answer 🙂