internal static bool IsFeatureEnabled(string featureId)
{
object value = RegistryHelpers.GetSetting("Feature_" + featureId, null);
if (value != null)
{
return(true); //todo: to prevent registry tampering, we should retrieve the activation key and check with the server that it is ok.
}
else
{
return(false);
}
}
public static bool IsTheKeyValid(string featureId)
{
string value = RegistryHelpers.GetSetting("Validity_" + featureId, null);
double valueAsDouble;
if (value != null && double.TryParse(value.Replace(',', '.'), NumberStyles.Any, CultureInfo.InvariantCulture, out valueAsDouble)) // Note: the "Replace" method is here only for backward compatibility, due to the fact that up to Beta 5 included, we didn't store the value with "InvariantCulture".
{
DateTime validityDate = DateTime.FromOADate(valueAsDouble);
if (DateTime.Today <= validityDate)
{
return(true); //the key is still valid
}
else
{
return(false); //the key is no longer valid
}
}
else
{
return(true); //We cannot know whether the key is valid or not so we consider that it is (permanent versions).
}
}
public static TrialStatus IsTrial(string featureId, out int numberOfDaysLeft)
{
numberOfDaysLeft = 0;
string value = RegistryHelpers.GetSetting("Trial_" + TRIAL_VERSION_IDENTIFIER + "_" + featureId, null);
double valueAsDouble;
if (value != null && Double.TryParse(value.Replace(',', '.'), NumberStyles.Any, CultureInfo.InvariantCulture, out valueAsDouble)) // Note: the "Replace" method is here only for backward compatibility, due to the fact that up to Beta 5 included, we didn't store the value with "InvariantCulture".
{
DateTime initialDate = DateTime.FromOADate(valueAsDouble);
numberOfDaysLeft = TRIAL_DURATION_IN_DAYS - ((int)(DateTime.Now - initialDate).TotalDays);
if (numberOfDaysLeft > 0)
{
return(TrialStatus.Running);
}
else
{
return(TrialStatus.Expired);
}
}
else
{
return(TrialStatus.NotStarted);
}
}
