C#获取网络时间并更新

  1 using System;
  2 using System.Net;
  3 using System.Net.Sockets;
  4 using System.Runtime.InteropServices;
  5 using System.Text;
  6 using System.Windows.Threading;
  7 
  8 namespace 获取网络时间
  9 {
 10     /// <summary>
 11     /// 使用time.nist.gov可靠性好
 12     /// 
 13     /// </summary>
 14     public class DateTimeHelper
 15     {
 16         [DllImport("kernel32.dll")]
 17         private static extern bool SetLocalTime(ref Systemtime time);
 18 
 19         [StructLayout(LayoutKind.Sequential)]
 20         private struct Systemtime
 21         {
 22             public short year;
 23             public short month;
 24             public short dayOfWeek;
 25             public short day;
 26             public short hour;
 27             public short minute;
 28             public short second;
 29             public short milliseconds;
 30         }
 31 
 32         /// <summary>
 33         /// 设置系统时间
 34         /// </summary>
 35         /// <param name="dt">需要设置的时间</param>
 36         /// <returns>返回系统时间设置状态，true为成功，false为失败</returns>
 37         public static bool SetLocalDateTime(DateTime dt)
 38         {
 39             Systemtime st;
 40 
 41             st.year = (short)dt.Year;
 42             st.month = (short)dt.Month;
 43             st.dayOfWeek = (short)dt.DayOfWeek;
 44             st.day = (short)dt.Day;
 45             st.hour = (short)dt.Hour;
 46             st.minute = (short)dt.Minute;
 47             st.second = (short)dt.Second;
 48             st.milliseconds = (short)dt.Millisecond;
 49             bool rt = SetLocalTime(ref st);
 50             return rt;
 51         }
 52 
 53 
 54         public static DateTime GetDateTime(long timeStamp)
 55         {
 56             return new DateTime(1970, 1, 1).AddSeconds(timeStamp).ToLocalTime();
 57         }
 58 
 59         public static bool GetInternetTime(string url, out DateTime dt, out string errMsg)
 60         {
 61             dt = DateTime.MinValue;
 62             var startDt = DateTime.Now;
 63             var port = 13;
 64             var socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp) { ReceiveTimeout = 2000 };
 65             try
 66             {
 67                 var iphostinfo = Dns.GetHostEntry(url);
 68                 var ip = iphostinfo.AddressList[0];
 69                 var ipe = new IPEndPoint(ip, port);
 70 
 71                 var iar = socket.BeginConnect(ipe, null, null);
 72                 if (!iar.AsyncWaitHandle.WaitOne(5000))
 73                 {
 74                     errMsg = "连接超时" + url;
 75                     return false;
 76                 }
 77                 var recvBuffer = new byte[1024];
 78                 var sb = new StringBuilder();
 79                 var myE = Encoding.UTF8;
 80 
 81                 int nBytes;
 82                 while ((nBytes = socket.Receive(recvBuffer, 0, 1024, SocketFlags.None)) > 0)
 83                 {
 84                     sb.Append(myE.GetString(recvBuffer, 0, nBytes));
 85                 }
 86                 var o = sb.ToString().Split(' ');
 87 
 88 
 89                 TimeSpan ts = DateTime.Now - startDt;
 90 
 91                 var setDt = Convert.ToDateTime(o[1] + " " + o[2]).Subtract(-ts); // 减去中途消耗的时间
 92 
 93 
 94                 dt = setDt.ToLocalTime();
 95                 Console.WriteLine(@"服务器：{0}时间：{1}", url, setDt);
 96                 errMsg = "";
 97                 return true;
 98             }
 99             catch (Exception ex)
100             {
101 
102                 errMsg = ex.Message;
103                 return false;
104             }
105             finally
106             {
107                 socket.Close();
108             }
109         }
110 
111         /// <summary>
112         /// 调用示例
113         /// </summary>
114         private static void ExamTest()
115         {
116             var ok = false;
117             var errMsg = "";
118             var dt = DateTime.MinValue;
119             var url = "time.nist.gov";
120             Action a = delegate
121             {
122                 if (string.IsNullOrEmpty(url)) return;
123 
124                 ok = DateTimeHelper.GetInternetTime(url, out dt, out errMsg);
125             };
126             a.BeginInvoke(_ =>
127             {
128                 Action b = delegate
129                 {
130                     if (ok)
131                     {
132                         var success = DateTimeHelper.SetLocalDateTime(dt);
133                         if (success)
134                         {
135                             string infoTxt = "更新时间成功:" + dt;
136                         }
137                     }
138                     else
139                     {
140                         string errInfo = "更新出错：" + errMsg;
141                     }
142                 };
143             }, null);
144         }
145     }
146 }

        private void SetTimeBtn_Click(object sender, RoutedEventArgs e)
        {
            SettimeBtn.IsEnabled = false;
            var ok = false;
            var errMsg = "";
            var dt = DateTime.MinValue;
            var url = SvrCombox.Text;
            Action a = delegate
            {
                if (string.IsNullOrEmpty(url)) return;

                ok = DateTimeHelper.GetInternetTime(url, out dt, out errMsg);
            };
            a.BeginInvoke(_ =>
            {
                Dispatcher.Invoke(() =>
                {
                    SettimeBtn.IsEnabled = true;
                    if (ok)
                    {
                        var success = DateTimeHelper.SetLocalDateTime(dt);
                        if (success)
                        {
                            InfoText.Text = "更新时间成功:" + dt;
                        }
                    }
                    else
                    {
                        InfoText.Text = "更新出错：" + errMsg;
                    }
                });
            }, null);
        }

posted on 2023-01-13 11:46 湘灵阅读(934) 评论(0) 收藏举报