Ниже приведена более полная реализация.
Использование: DateTime? now = RemoteTOD.GetNow(@"\\ServerName");
using System;
using System.ComponentModel;
using System.Runtime.InteropServices;
//https://docs.microsoft.com/en-us/windows/desktop/api/lmremutl/nf-lmremutl-netremotetod
public static class RemoteTOD {
// Important: CharSet must be Unicode otherwise error 2184 is returned
[DllImport("netapi32.dll", SetLastError=true, CharSet=CharSet.Unicode)]
private static extern int NetRemoteTOD(String UncServerName, ref IntPtr BufferPtr);
[DllImport("netapi32.dll")]
private static extern void NetApiBufferFree(IntPtr bufptr);
public static DateTime? GetNow(String serverName, bool throwException = false) {
IntPtr ptrBuffer = IntPtr.Zero;
int result = NetRemoteTOD(serverName, ref ptrBuffer);
if (result != 0) {
if (throwException)
throw new Win32Exception(Marshal.GetLastWin32Error());
return null;
}
TIME_OF_DAY_INFO tod = (TIME_OF_DAY_INFO) Marshal.PtrToStructure(ptrBuffer, typeof(TIME_OF_DAY_INFO));
NetApiBufferFree(ptrBuffer); // must be freed using NetApiBufferFree according to the documentation
//DateTime d0 = new DateTime(1970,1,1);
//d0 = d0.AddSeconds(tod.elapsedt);
DateTime nowUtc = new DateTime(tod.year, tod.month, tod.day, tod.hour, tod.minute, tod.second, 10 * tod.hunds);
DateTime now = nowUtc.ToLocalTime();
return now;
}
}
[StructLayout(LayoutKind.Sequential)]
public struct TIME_OF_DAY_INFO {
///<summary>The number of seconds since 00:00:00, January 1, 1970, GMT.</summary>
public int elapsedt;
///<summary>The number of milliseconds from an arbitrary starting point (system reset). Typically, this member is read twice,
///once when the process begins and again at the end. To determine the elapsed time between the process's start and finish,
///you can subtract the first value from the second.</summary>
public int msecs;
///<summary>The current hour. Valid values are 0 through 23.</summary>
public int hour;
///<summary>The current minute. Valid values are 0 through 59.</summary>
public int minute;
///<summary>The current second. Valid values are 0 through 59.</summary>
public int second;
///<summary>The current hundredth second (0.01 second). Valid values are 0 through 99.</summary>
public int hunds;
///<summary>The time zone of the server. This value is calculated, in minutes, from Greenwich Mean Time (GMT). For time zones
///west of Greenwich, the value is positive; for time zones east of Greenwich, the value is negative. A value of –1 indicates
///that the time zone is undefined.</summary>
public int timezone;
///<summary>The time interval for each tick of the clock. Each integral integer represents one ten-thousandth second (0.0001 second).</summary>
public int tinterval;
///<summary>The day of the month. Valid values are 1 through 31.</summary>
public int day;
///<summary>The month of the year. Valid values are 1 through 12.</summary>
public int month;
///<summary>The year.</summary>
public int year;
///<summary>The day of the week. Valid values are 0 through 6, where 0 is Sunday, 1 is Monday, and so on.</summary>
public int weekday;
}