/// <summary>
/// Converts a localTime from a source time zone to a target time zone, adjusting for DST as needed.
/// The localTime must be a local time in the sourceTimeZoneName time zone.
/// </summary>
/// <param name="sourceTimeZoneName">Time zone name which represents localTime.</param>
/// <param name="localTime">The source local time.</param>
/// <param name="targetTimeZoneName">The time zone name which to convert the localTime.</param>
/// <returns>The local time for targetTimeZoneName.</returns>
public static DateTime ToLocalTime(string sourceTimeZoneName, DateTime localTime, string targetTimeZoneName)
{
DateTime utc = TimeZoneInformation.ToUniversalTime(sourceTimeZoneName, localTime);
DateTime lt = TimeZoneInformation.ToLocalTime(utc, targetTimeZoneName);
return(lt);
}
static TimeZoneInformation()
{
timeZones = new List <TimeZoneInformation>();
using (RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones"))
{
string[] zoneNames = key.GetSubKeyNames();
foreach (string zoneName in zoneNames)
{
using (RegistryKey subKey = key.OpenSubKey(zoneName))
{
TimeZoneInformation tzi = new TimeZoneInformation();
tzi.displayName = (string)subKey.GetValue("Display");
tzi.standardName = (string)subKey.GetValue("Std");
tzi.daylightName = (string)subKey.GetValue("Dlt");
tzi.InitTzi((byte[])subKey.GetValue("Tzi"));
timeZones.Add(tzi);
}
}
// Order list by offset
timeZones.Sort(CompareByOffset);
}
}
private TZI tzi; // Current time zone information.
#endregion Fields
#region Constructors
static TimeZoneInformation()
{
timeZones = new List<TimeZoneInformation>();
using (RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones"))
{
string[] zoneNames = key.GetSubKeyNames();
foreach (string zoneName in zoneNames)
{
using (RegistryKey subKey = key.OpenSubKey(zoneName))
{
TimeZoneInformation tzi = new TimeZoneInformation();
tzi.displayName = (string)subKey.GetValue("Display");
tzi.standardName = (string)subKey.GetValue("Std");
tzi.daylightName = (string)subKey.GetValue("Dlt");
tzi.InitTzi((byte[])subKey.GetValue("Tzi"));
timeZones.Add(tzi);
}
}
// Order list by offset
timeZones.Sort(CompareByOffset);
}
}
private static int CompareByOffset(TimeZoneInformation x, TimeZoneInformation y)
{
if (x.StandardOffset.TotalHours < y.StandardOffset.TotalHours)
{
return(-1);
}
else if (x.StandardOffset.TotalHours > y.StandardOffset.TotalHours)
{
return(1);
}
else
{
return(0);
}
}
public override void Initialize(OptimusMiniSettingsList currentSettings)
{
_Timezones = new TimezoneItem[5];
for (int i = 0; i < 5; i++)
{
string lTimezone = currentSettings["Timezone" + i.ToString()];
string lLabel = currentSettings["Label" + i.ToString()];
if (lTimezone != "" && TimeZoneInformation.ContainsTimeZone(lTimezone))
{
TimezoneItem lItem = new TimezoneItem(TimeZoneInformation.GetTimeZone(lTimezone), lLabel);
_Timezones[i] = lItem;
}
else
{
_Timezones[i] = null;
}
}
RequestNextUpdate(new TimeSpan(0, 0, 0));
}
public override void Repaint()
{
DateTime lUtc = DateTime.UtcNow;
lock (_Graphic)
{
_Graphic.FillRectangle(Brushes.Black, 0, 0, 96, 96);
for (int i = 0; i < 5; i++)
{
TimezoneItem lItem = _Timezones[i];
if (lItem == null)
{
continue;
}
string lTime = string.Format("{0} {1}", TimeZoneInformation.ToLocalTime(lUtc, lItem.Timezone.StandardName).ToShortTimeString(), lItem.Label);
_Graphic.DrawString(lTime, SystemFonts.DefaultFont, Brushes.White, 0, i * 19);
}
_Graphic.Flush();
UpdateImage(_Bitmap);
}
}
public WorldTimeConfig(OptimusMiniSettingsList currentSettings)
{
InitializeComponent();
_Settings = currentSettings;
_Items = new List <TimezoneItem>();
// ----- Fill select box with all timezones
foreach (TimeZoneInformation lTimezone in TimeZoneInformation.TimeZones)
{
selectTimezone.Items.Add(lTimezone.DisplayName);
}
selectTimezone.SelectedIndex = 0;
// ----- Add stored timezones
for (int i = 0; i < 5; i++)
{
string lTimezone = _Settings["Timezone" + i.ToString()];
if (TimeZoneInformation.ContainsTimeZone(lTimezone))
{
TimezoneItem lItem = new TimezoneItem(TimeZoneInformation.GetTimeZone(lTimezone), _Settings["Label" + i.ToString()]);
_Items.Add(lItem);
listTimezones.Items.Add(string.Format("{0}: {1}", lItem.Label, lItem.Timezone.DisplayName));
}
}
if (_Items.Count > 0)
{
listTimezones.Items[0].Selected = true;
}
// ----- Update controls
UpdateActions();
}
/// <summary>
/// Converts a local time in specified time zone to UTC time.
/// </summary>
/// <param name="standardTimeZoneName">The standard time zone name.</param>
/// <param name="local">The local time to convert.</param>
/// <returns>The UTC time.</returns>
/// <exception cref="ArgumentException">Thrown if time zone name not found.</exception>
/// <exception cref="NotSupportedException">Thrown if the method failed due to missing platform support.</exception>
public static DateTime ToUniversalTime(string standardTimeZoneName, DateTime local)
{
TimeZoneInformation tzi = TimeZoneInformation.GetTimeZone(standardTimeZoneName);
return(tzi.ToUniversalTime(local));
}
/// <summary>
/// Converts the value of the utc time to local time in supplied time zone.
/// </summary>
/// <param name="utc">The time to convert.</param>
/// <param name="targetTimeZoneName">The standard name of the time zone.</param>
/// <returns>The local time.</returns>
/// <exception cref="ArgumentException">Thrown if time zone not found.</exception>
public static DateTime ToLocalTime(DateTime utc, string targetTimeZoneName)
{
TimeZoneInformation tzi = TimeZoneInformation.GetTimeZone(targetTimeZoneName);
return(tzi.ToLocalTime(utc));
}
public TimezoneItem(TimeZoneInformation timezone, string label)
{
Timezone = timezone;
Label = label;
}
private void Repaint_Timezone(TimeZoneInformation timezone, int y)
{
}
private void Repaint_Timezone(TimeZoneInformation timezone,int y)
{
}
public TimezoneItem(TimeZoneInformation timezone, string label)
{
Timezone = timezone;
Label = label;
}
private static int CompareByOffset(TimeZoneInformation x, TimeZoneInformation y)
{
if (x.StandardOffset.TotalHours < y.StandardOffset.TotalHours)
{
return -1;
}
else if (x.StandardOffset.TotalHours > y.StandardOffset.TotalHours)
{
return 1;
}
else
{
return 0;
}
}
