1 using System; 2 using System.Collections.Generic; 3 using System.ComponentModel; 4 using System.Data; 5 using System.Drawing; 6 using System.Linq; 7 using System.Text; 8 using System.Threading.Tasks; 9 using System.Windows.Forms;10 using System.Net;11 12 namespace 时间13 {14     public partial class Form1 : Form15     {16         public Form1()17         {18             InitializeComponent();19         }20 21         private void Form1_Load(object sender, EventArgs e)22         {23             timer1.Interval = 1000;24             timer1.Start();25         }26         private void rftime()27         {28             DateTime dt = DateTime.Now;29             String date = dt.ToLongDateString();30             String time = dt.ToLongTimeString();31 32 33         }34 35         private void timer1_Tick(object sender, EventArgs e)36         {37             {
   //显示时间38                 string netTime = GetNetDateTime();39                 if (netTime != "")40                 {41                     LabNow.Text = "北京时间（网络）：" + Convert.ToDateTime(netTime).ToString("yyyy年MM月dd dddd HH时mm分ss秒");42                 }43                 else44                 {45                     LabNow.Text = "北京时间（本地）：" + DateTime.Now.ToString("yyyy年MM月dd dddd HH时mm分ss秒");46                 }47 48 49             }50         }51         public static string GetNetDateTime()52         {
   //获取网络时间53             WebRequest request = null;54             WebResponse response = null;55             WebHeaderCollection headerCollection = null;56             string datetime = string.Empty;57             try58             {59                 request = WebRequest.Create("https://www.baidu.com");60                 request.Timeout = 3000;61                 request.Credentials = CredentialCache.DefaultCredentials;62                 response = request.GetResponse();63                 headerCollection = response.Headers;64                 foreach (var h in headerCollection.AllKeys)65                 {66                     if (h == "Date")67                     {68                         datetime = headerCollection[h];69                     }70                 }71                 return datetime;72             }73             catch (Exception) { return datetime; }74             finally75             {76                 if (request != null)77                 { request.Abort(); }78                 if (response != null)79                 { response.Close(); }80                 if (headerCollection != null)81                 { headerCollection.Clear(); }82             }83         }84     }85 }