public static void DisplayTrialMessage(string productName, string productSerialRegistry)
{
//Check for registry entry, that indicates if the message was displayed previously today
string msgDispDate = CommonAttributes.LoadFromRegistry(productSerialRegistry + "_tr");
string todayStr = DateTime.Now.ToString(CommonAttributes.DATE_FORMAT, System.Globalization.CultureInfo.GetCultureInfo("en-US"));
if (msgDispDate != todayStr)
{
int daysRemaining = CommonAttributes.GetRemainingDaysTrial();
// Displays the trial message once a day
MessageBox.Show(
string.Format("You are running trial version of {0} and you\n" +
"have {1} days remaining. You can register your product\n" +
"by running About from the {0} menu.", productName, daysRemaining.ToString()), "Please register"
);
CommonAttributes.SaveToRegistry(productSerialRegistry + "_tr", todayStr);
}
}
// Check the registry for valid date and serial number
public static bool CheckSerialNumberRegistry(string productName, string productSerialRegistry)
{
string nextDateCheck = CommonAttributes.LoadFromRegistry(CommonAttributes.RegNewDate);
DateTime RegKeyDate;
nextDateCheck = Encryption.Decrypt(nextDateCheck);
try
{
RegKeyDate = DateTime.ParseExact(nextDateCheck, "yyyyMMdd", System.Globalization.CultureInfo.GetCultureInfo("en-US"));
}
catch (Exception)
{
MessageBox.Show("Please provide Internet connection for validating your product");
return(false);
}
if ((RegKeyDate <= DateTime.Now) || (nextDateCheck == string.Empty) || (nextDateCheck == null))
{
MessageBox.Show("Please provide Internet connection for validating your product");
return(false);
}
// TO DO: check for trial period
string serialNumber = CommonAttributes.LoadSNFromRegistry(productSerialRegistry);
if (serialNumber == null) // In case of missing registry entry
{
MessageBox.Show("Corrupted installation found. Please reinstall " + productName + "!");
return(false);
}
// Trial mode or invalid serial number
if ((serialNumber == "0") || (serialNumber == string.Empty))
{
// Displays the trial message once a day
DisplayTrialMessage(productName, productSerialRegistry);
}
// If everything is ok program loading continues
return(true);
}
public static string GetUserInfoElement(RegCustInd index)
{
return(CommonAttributes.LoadFromRegistry(RegIfnoCustomer[(int)index]));
}