Object needs to be instantiated

[ptrck]

I got this code from this link here:"http://bytes.com/topic/c-sharp/answers/474927-problem-setting-time-zone-settimezoneinformation". There is a problem with this line : object varValue = rkTZInfo.GetValue("TZI"); which is rkTZInfo needs to be instantiated and I can't see what to instantiate it to.

[DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        private extern static bool SetTimeZoneInformation(ref
        TIME_ZONE_INFORMATION lpTimeZoneInformation);
 
        [StructLayoutAttribute(LayoutKind.Sequential)]
        private struct SYSTEMTIME
        {
            public ushort wYear;
            public ushort wMonth;
            public ushort wDayOfWeek;
            public ushort wDay;
            public ushort wHour;
            public ushort wMinute;
            public ushort wSecond;
            public ushort wMilliseconds;
        }
 
        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
        private struct TIME_ZONE_INFORMATION
        {
            public int Bias;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
            public string StandardName;
            public SYSTEMTIME StandardDate;
            public int StandardBias;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
            public string DaylightName;
            public SYSTEMTIME DaylightDate;
            public int DaylightBias;
        }
 
        [StructLayoutAttribute(LayoutKind.Sequential)]
        private struct REGTZI
        {
            public int Bias;
            public int StandardBias;
            public int DaylightBias;
            public SYSTEMTIME StandardDate;
            public SYSTEMTIME DaylightDate;
        }
 
        public bool SetTimeZone(int index)
        {
            // Omitted (uses index to find the time zone in the registry so that I can get the
            // information about the time zone using the appropriate key's TZI value
 
            // We've found the right time zone, get the TZI data
 
            object varValue = rkTZInfo.GetValue("TZI");
            byte[] baData = varValue as byte[];
            int iSize = baData.Length;
            IntPtr buffer = Marshal.AllocHGlobal(iSize);
            Marshal.Copy(baData, 0, buffer, iSize);
            REGTZI rtzi;
            rtzi = (REGTZI)Marshal.PtrToStructure(buffer, typeof(REGTZI));
            Marshal.FreeHGlobal(buffer);
 
            // Now fill out TIME_ZONE_INFORMATION with that data
            TIME_ZONE_INFORMATION tZoneInfo = new TIME_ZONE_INFORMATION();
            tZoneInfo.Bias = rtzi.Bias;
            tZoneInfo.StandardBias = rtzi.StandardBias;
            tZoneInfo.DaylightBias = rtzi.DaylightBias;
            tZoneInfo.StandardDate = rtzi.StandardDate;
            tZoneInfo.DaylightDate = rtzi.DaylightDate;
            tZoneInfo.StandardName = (string)rkTZInfo.GetValue("Std");
            tZoneInfo.DaylightName = (string)rkTZInfo.GetValue("Dlt");
 
            if (!SetTimeZoneInformation(ref tZoneInfo))
            {
                return (false);
            }
        }
 

[Bassem]

I think you have a part of the code, the missing part is designer code, that's where this object is "declared" and "instantiated".

Thanks,
Bassem

[ptrck]

Thanks Bassem for your reply.....with regards to the designer code, I did not see anything else from the link except what I've posted. I think the original poster just did not add it.

[Bassem]

That's true. And that we often do here.
Me, I don't like to read a post that waste my time and my effort with the designer code. And easily I should expect what the coder added into its design.

[ptrck]

I understand fully the reasons behind it but in this case I'm stuck and this individual looks like he's not even a member of this forum anymore which prevents me from sending him a private message.

[Bassem]

I didn't work with WebParts controls before, or I would tell you what exactly the control is.

Anyway, I think it is not a control, it is something like a Dictionary<byte[], string> that what the code tell me, but I'm sure someone here can tell us more.

Thanks,
Bassem