c#獲取網絡時間並實時更新

1.獲取網絡時間

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;

namespace WIFI_TCP_test
{
    class GetNetDateTime
    {
        /// <summary>
        /// 獲取網絡日期時間
        /// </summary>
        /// <returns></returns>
        public  string GetNetDateTime()
        {
            WebRequest request = null;
            WebResponse response = null;
            WebHeaderCollection headerCollection = null;
            string datetime = string.Empty;
            try
            {
                request = WebRequest.Create("https://www.baidu.com");
                request.Timeout = 3000;
                request.Credentials = CredentialCache.DefaultCredentials;
                response = (WebResponse)request.GetResponse();
                headerCollection = response.Headers;
                foreach (var h in headerCollection.AllKeys)
                { if (h == "Date") { datetime = headerCollection[h]; } }
                return datetime;
            }
            catch (Exception) { return datetime; }
            finally
            {
                if (request != null)
                { request.Abort(); }
                if (response != null)
                { response.Close(); }
                if (headerCollection != null)
                { headerCollection.Clear(); }
            }
        }
    }
}

2.添加Timer1控件設置爲刷新時間爲1000ms

3.調用

metroLabel3.Text = Convert.ToDateTime(datetime.GetNetDateTimes()).ToString("yyyy - MM - dd HH: mm:ss");