Changing Time Zone with C#... Hmmmmm
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Hi remarkpk,
The following code it's what I did and copied from yours.
And the error from VS 2005 is "The type or namespace name 'TimeZoneCollection' could not be found (are you missing a using directive or an assembly reference?)".
Thanks for your help.
namespace
test{
public partial class Form1 : Form{
private void Form1_Load(object sender, EventArgs e){
foreach (Time.TimeZoneInformation tzi in Time.GetTimeZones){
cboZones.Items.Add(tzi);
}
for (int i = 0; i < cboZones.Items.Count; i++){
if (Convert.ChangeType(cboZones.Items
, Time.TimeZoneInformation).standardName = Time.CurrentTimeZone.StandardName)
{
cboZones.SelectedIndex = i;
break;}
}
}
private void btnChangeTZI_Click(object sender, EventArgs e){
Time.SetTimeZone(Convert.ChangeType(cboZones.SelectedItem, Time.TimeZoneInformation));}
}
public class Time{
#region
DLL Imports[
DllImport("kernel32.dll", CharSet = CharSet.Auto)] private static extern int GetTimeZoneInformation(out TimeZoneInformation lpTimeZoneInformation);[
DllImport("kernel32.dll", CharSet = CharSet.Auto)] private static extern bool SetTimeZoneInformation(ref TimeZoneInformation lpTimeZoneInformation);[
StructLayout(LayoutKind.Sequential)] public struct SYSTEMTIME{
public short wYear; public short wMonth; public short wDayOfWeek; public short wDay; public short wHour; public short wMinute; public short wSecond; public short wMilliseconds;}
[
StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)] public struct TimeZoneInformation{
public int bias;[
MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)] public string standardName;[
MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)] public string daylightName; SYSTEMTIME standardDate; SYSTEMTIME daylightDate; public int standardBias; public int daylightBias;}
#endregion
public static TimeZone CurrentTimeZone{
get { return TimeZone.CurrentTimeZone; }}
public static bool SetTimeZone(TimeZoneInformation tzi){
ComputerManager.EnableToken(
"SeTimeZonePrivilege", Process.GetCurrentProcess().Handle); // set local system timezone return SetTimeZoneInformation(ref tzi);}
public static TimeZoneCollection GetTimeZones(){
//open key where all time zones are located in the registry RegistryKey timeZoneKeys = Registry.LocalMachine.OpenSubKey("Software\\Microsoft\\Windows NT\\CurrentVersion\\Time Zones");
//create a new hashtable which will store the name //of the timezone and the associate time zone information structTimeZoneCollection zones =
new TimeZoneCollection(); //iterate through each time zone in the registry and add it to the hash table foreach (string zonekey in timeZoneKeys.GetSubKeyNames()){
//get current time zone key RegistryKey individualZone = timeZoneKeys.OpenSubKey(zonekey); //create new TZI struct and populate it with values from key TimeZoneInformation TZI = new TimeZoneInformation();TZI.standardName = individualZone.GetValue(
"Std").ToString();TZI.daylightName = individualZone.GetValue(
"Display").ToString(); //read binary TZI data, convert to byte array byte[] b = (byte[])individualZone.GetValue("TZI");TZI.bias =
BitConverter.ToInt32(b, 0); //add the name and TZI struct to hash tablezones.Add(TZI.daylightName, TZI);
}
return zones;}
}
}
