Infralution Support

[Pointeman]

Q. How do I force a periodic license check by contacting the Authentication Web Service?

[Infralution]

Your application can call the AuthenticatedLicenseProvider.IsAuthenticated method to check with the server that a license is still authenticated. So could do this every 5th time your application starts - or whatever you want.
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Infralution Support

[Pointeman]

Okay, I'm lost here, help...

AuthenticationService authSvr = new AuthenticationService();
bool isValid = authSvr.IsAuthenticated(LICENSE_PARAMETERS, "", "");

[Infralution]

No - not AuthenticationService.IsAuthenticated but AuthenticatedLicenseProvider.IsAuthenticated. This lets you just pass the license you had previously loaded.
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Infralution Support

[Pointeman]

Yea, here is the code we have so far. It doesn't throw error or open the messagebox either. We would like to know how to incorporate the following code with your AuthenticateApp_CS example. Maybe they conflict when used together?

[Infralution]

Here is some code that checks that the license is authenticated every fifth time the software is run. To do this it uses the EvaluationMonitor.UsageCount property.

[Pointeman]

I have re-coded the 'AuthenticatedLicenseProvider' differently below. I run the Eval Monitor first...

Q. Will 'evaluationMonitor.UsageCount' continue to count even though a good license is installed?

1. My concern is product refunds where the end-user is still using the software license.
2. There are also those who have legitimate license, but are disconnected from the Internet or our web service is down.

This way the program is 'crippled', but not entirely de-licensed. See what you think...

EvaluationMonitor evaluationMonitor = new RegistryEvaluationMonitor("MyEvaluationPassword");

if (_license == null)
{
EvaluationDialog evaluationDialog = new EvaluationDialog(evaluationMonitor, Application.ProductName);
EvaluationDialogResult dialogResult = evaluationDialog.ShowDialog();
if (dialogResult == EvaluationDialogResult.Exit) return;
if (dialogResult == EvaluationDialogResult.Continue) break;

if (dialogResult == EvaluationDialogResult.InstallLicense)
{
AuthenticatedLicenseInstallForm licenseForm = new AuthenticatedLicenseInstallForm();
_license = licenseForm.ShowDialog(_licenseFile, null);
}
}

if (_license != null) //License file good
{
if(evaluationMonitor.UsageCount % 5 == 0)
{
AuthenticatedLicenseProvider provider = new AuthenticatedLicenseProvider();
_license = provider.GetLicense(LICENSE_PARAMETERS, _licenseFile, true);

try
{
if (!provider.IsAuthenticated(_license))
{
MessageBox.Show("License Error; Program Closing...");
Application.ExitThread();
}
}
catch (Exception)
{
}
}

[Infralution]

Some things don't make sense there - perhaps you haven't posted all the code. Are you calling provider.GetLicense() before this code? If you aren't then _license will always be null when the code is executed so you would always display the EvaluationMonitor.

Also further down where you do call GetLicense there is no real need to - because this code is only executed if _license != null.

The evaluationMonitor is completely separate from the LicenseProvider - so it will continue to work even though a license is installed if you call it.

I'm not clear on what your modifications really achieve. If you just what to go back to evaluation mode when you are unable to contact the authentication service then you could use the original code I posted but in the exception handler put the following:

[Pointeman]

Good Point. I moved the following code because I thought it was crashing the program on boot-up.

AuthenticatedLicenseInstallForm licenseForm = new AuthenticatedLicenseInstallForm();
_license = licenseForm.ShowDialog(_licenseFile, null);