/// <summary>
/// This method works in conjunction with the Data Transfer app placing its time, which we assume to be the correct time,
/// in a special registry location and then remotely starting this mobile app with the "SetTime" parameter. It's important,
/// though not critical, to keep the time on all the mobile devices as correct as possible.
/// </summary>
/// <returns>true - Time was changed false - Time was not changed</returns>
public static bool UpdateLocalTime()
{
DateTime currTime = DateTime.Now;
string sNewTime = RegistryCF.GetNewTime();
RegistryCF.ClearNewTime(); // Good practice to clear this time value
if (sNewTime != "")
{
//DateTime newTime = Convert.ToDateTime(sNewTime);
DateTime newTime = Tools.GetDateFromString(sNewTime);
// The 2nd test is to ensure that the date in the registry isn't completely bogus
if ((newTime.ToString() != "") && (newTime.Year == currTime.Year))
{
TimeSpan timeSpan = currTime - newTime;
if (Math.Abs(timeSpan.Minutes) > 5) // Don't bother changing if time difference is less than 5 minutes
{
DateTimeEx.SetLocalTime(newTime);
return(true);
}
}
}
return(false);
}
/// <summary>
/// Checks whether a GUID value exists and if not then creates one.
/// </summary>
public static void CheckGuid()
{
string sGuid = RegistryCF.GetGuid();
if (sGuid == null)
{
Guid guid = PocketGuid.NewGuid();
RegistryCF.SetGuid(guid.ToString());
}
}
/// <summary>
/// There is apparently no direct way from the desktop app to get the version number of the mobile
/// 'PP.exe' file (which this code compiles into btw). So this method, called upon startup, will
/// ensure that the CF Registry is correctly updated with the version number.
///
/// Note: If the user aborts an update then the version number will be incorrectly updated since
/// the new EXE won't actually be installed. So this method is the key to resetting the
/// version number back to what is the real version number.
/// </summary>
/// <param name="updateRegistry"></param> // Updates the registry, if required
public static string GetVersionNumber(bool updateRegistry)
{
// Note: A bug was observed whereby the last digit of version retrieved from the assembly is not always correct
string actualVersion = Assembly.GetExecutingAssembly().GetName().Version.ToString();
string apparentVersion = RegistryCF.GetVersionNumber();
if (updateRegistry)
{
if (Tools.CompareVersionNumbers(actualVersion, apparentVersion) == 1)
{
RegistryCF.SetVersionNumber(actualVersion);
}
}
return(actualVersion);
}