PLUSManaged: Deactivating and Transferring Licenses

Deactivation can occur one of two ways: you may allow customers to deactivate from your application, or you can remotely deactivate a license or an activation using SOLO Server's administrative interface.

Important

It is very important to rely on background checking and refreshing when allowing users to deactivate your application!  Automated background checking helps prevent users from licensing more systems than intended by restoring the entire system/computer from an image or snapshot taken before deactivation occurred.

In either case, when your application deactivates its license, or runs a background check or refreshes its license and detects that it has been deactivated, it can then disable access to the application or certain features.

Important

Be mindful about whether or not disabling access to your application is appropriate.  For example, if your application requires high availability (such as a web application or service) and/or your application serves some mission-critical function, it may be more appropriate to have your application display nag messages and/or disable only non-critical features so as to avoid disrupting your customers' business or operation.

Deactivating and Transferring Licenses in your Application

Allowing your customers to deactivate individual activations online is a convenience to them that also reduces your support overhead. Since deactivating allows users to activate a new system, this is a very simple and convenient way for your customers to essentially migrate (or transfer) the license from one system to another. An example of when a customer would want to use this functionality would be when he or she is upgrading from one computer to another.

C#
public bool DeactivateOnline()
{
//initialize the object used for calling the web service method
using (XmlActivationService ws = new XmlActivationService())
{
if (DeactivateInstallation(ws))
{
File.Delete("[License File Path]");
return true;
}
}

return false;
}
VB.NET
Public Function DeactivateOnline() As Boolean
'initialize the object used for calling the web service method
Using ws As New XmlActivationService()
If DeactivateInstallation(ws) Then
File.Delete("[License File Path]")
Return True
End If

Return False
End Using
End Function

Note how this example code deletes the license when the deactivation is successful. This is because the license should be considered invalid when the application has been deactivated. Deleting the license file is an appropriate response to these result codes for read-only License implementations.  However, when using WritableLicense implementations, you should alter the local license file in-code as appropriate for your licensing requirements, and save it and its aliases.