C#同步网络时间和本地时间详解编程语言

客户的机器的系统时间经常出错，导致给他们做的软件无法正常使用，所以后来就加了一个同步网络时间的小功能。实现起来很简单，但是却很使用。这个小功能就是先获取网络时间，然后将系统的时间修改成从网络获得的时间。下面是具体的实现：

获取网络时间： 

using System;   
using System.Collections.Generic;   
using System.Linq;   
using System.Text;   
using System.IO;   
using System.Net;   
using System.Net.Sockets;   
using System.Text.RegularExpressions;   
using System.Runtime.InteropServices; 
using System.Runtime;     
 
 
 
    /// <summary>   
    /// 网络时间   
    /// </summary>   
    public class NetTime 
    { 
        
        /// <summary>   
        /// 获取标准北京时间，读取http://www.beijing-time.org/time.asp   
        /// </summary>   
        /// <returns>返回网络时间</returns>   
        public DateTime GetBeijingTime() 
        { 
          
            DateTime dt; 
            WebRequest wrt = null; 
            WebResponse wrp = null; 
            try 
            { 
                wrt = WebRequest.Create("http://www.beijing-time.org/time.asp"); 
                wrp = wrt.GetResponse(); 
 
                string html = string.Empty; 
                using (Stream stream = wrp.GetResponseStream()) 
                { 
                    using (StreamReader sr = new StreamReader(stream, Encoding.UTF8)) 
                    { 
                        html = sr.ReadToEnd(); 
                    } 
                } 
 
                string[] tempArray = html.Split(';'); 
                for (int i = 0; i < tempArray.Length; i++) 
                { 
                    tempArray[i] = tempArray[i].Replace("/r/n", ""); 
                } 
 
                string year = tempArray[1].Split('=')[1]; 
                string month = tempArray[2].Split('=')[1]; 
                string day = tempArray[3].Split('=')[1]; 
                string hour = tempArray[5].Split('=')[1]; 
                string minite = tempArray[6].Split('=')[1]; 
                string second = tempArray[7].Split('=')[1]; 
 
                dt = DateTime.Parse(year + "-" + month + "-" + day + " " + hour + ":" + minite + ":" + second); 
            } 
            catch (WebException) 
            { 
                return DateTime.Parse("2011-1-1"); 
            } 
            catch (Exception) 
            { 
                return DateTime.Parse("2011-1-1"); 
            } 
            finally 
            { 
                if (wrp != null) 
                    wrp.Close(); 
                if (wrt != null) 
                    wrt.Abort(); 
            } 
            return dt; 
 
        } 
    } 
 
 
 

获取网络时间，返回一个DateTime对象，然后传给设置系统时间的方法，修改系统时间。

同步系统时间：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.IO; 
using System.Net; 
using System.Net.Sockets; 
using System.Text.RegularExpressions; 
using System.Runtime.InteropServices; 
using System.Runtime;     
 
 
    /// <summary> 
    /// 更新系统时间 
    /// </summary> 
    public class UpdateTime 
    { 
        //设置系统时间的API函数 
        [DllImport("kernel32.dll")] 
        private static extern bool SetLocalTime(ref SYSTEMTIME time); 
 
        [StructLayout(LayoutKind.Sequential)] 
        private struct SYSTEMTIME 
        { 
            public short year; 
            public short month; 
            public short dayOfWeek; 
            public short day; 
            public short hour; 
            public short minute; 
            public short second; 
            public short milliseconds; 
        } 
 
        /// <summary> 
        /// 设置系统时间 
        /// </summary> 
        /// <param name="dt">需要设置的时间</param> 
        /// <returns>返回系统时间设置状态，true为成功，false为失败</returns> 
        public static bool SetDate(DateTime dt) 
        { 
            SYSTEMTIME st; 
 
            st.year = (short)dt.Year; 
            st.month = (short)dt.Month; 
            st.dayOfWeek = (short)dt.DayOfWeek; 
            st.day = (short)dt.Day; 
            st.hour = (short)dt.Hour; 
            st.minute = (short)dt.Minute; 
            st.second = (short)dt.Second; 
            st.milliseconds = (short)dt.Millisecond; 
            bool rt = SetLocalTime(ref st); 
            return rt; 
        } 
    } 
 
 
 

两个方法分别写在了两个类里面，只需要在客户端实例化两个对象，然后依次调用其方法即可，简单实用。