下面代码耗时太长
Dim TimeServers As String(,) = New String(2, 1) {}
TimeServers(0, 0) = "time-b.timefreq.bldrdoc.gov"
TimeServers(0, 1) = "132.163.4.102"
TimeServers(1, 0) = "time-c.timefreq.bldrdoc.gov"
TimeServers(1, 1) = "132.163.4.103"
TimeServers(2, 0) = "utcnist.colorado.edu"
TimeServers(2, 1) = "128.138.140.44"
Dim portNum As Integer = 13
Dim hostName As String
Dim bytes As Byte() = New Byte(1023) {}
Dim bytesRead As Integer = 0
Dim client As New System.Net.Sockets.TcpClient()
Dim str1 As String
Dim count As Integer = 0
Do
For i As Integer = 0 To 2
hostName = TimeServers(i, 1)
Try
client.Connect(hostName, portNum)
Dim ns As System.Net.Sockets.NetworkStream = client.GetStream()
bytesRead = ns.Read(bytes, 0, bytes.Length)
client.Close()
Exit For
Catch generatedExceptionName As System.Exception
End Try
Next
str1 = System.Text.Encoding.ASCII.GetString(bytes, 0, bytesRead)
count += 1
Loop While count < 10 AndAlso str1 Is Nothing
Dim sp As Char() = New Char(0) {}
sp(0) = " "c
Dim dt As System.DateTime = New DateTime()
Dim s As String()
s = str1.Split(sp)
dt = System.DateTime.Parse(s(1) & " " & s(2))
'得到标准时间
dt = dt.AddHours(8)
'得到北京时间
Messagebox.show( dt)
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Post By：2018/2/24 15:25:00 [只看该作者]
