VB.NET

Get Current Date/Time from NIST Time Server

See more Socket/SSL/TLS Examples

Demonstrates using Chilkat Socket to connect to an NIST time server and (using the old Time Protocol (RFC 868)), will read the current GMT time.

Note: This is not necessarily the very best means for getting the current date/time. The most commonly used time protocol is the Network Time Protocol (RFC-1305).

VB.NET

Dim success As Boolean = False

' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim socket As New Chilkat.Socket

' Connect to an NIST time server and read the current date/time
Dim maxWaitMs As Integer = 4000
Dim useTls As Boolean = False
success = socket.Connect("time-c.nist.gov",37,useTls,maxWaitMs)
If (success <> True) Then
    Debug.WriteLine(socket.LastErrorText)
    Exit Sub
End If


' The time server will send a big-endian 32-bit integer representing
' the number of seconds since since 00:00 (midnight) 1 January 1900 GMT.
' The ReceiveInt32 method will receive a 4-byte integer, but returns
' True or False to indicate success.  If successful, the integer
' is obtained via the ReceivedInt property.
Dim bigEndian As Boolean = True
success = socket.ReceiveInt32(bigEndian)
If (success <> True) Then
    Debug.WriteLine(socket.LastErrorText)
    Exit Sub
End If


Dim dt As New Chilkat.CkDateTime
dt.SetFromNtpTime(socket.ReceivedInt)

' Show the current local date/time
Dim bLocalTime As Boolean = True
Debug.WriteLine("Current local date/time: " & dt.GetAsRfc822(bLocalTime))

maxWaitMs = 10
socket.Close(maxWaitMs)