C# 时间校验器

时间校验器处理过程:

1. 从网络获得标准北京时间
2. 解析时间
3. 修改本地时间

*注:对于Windows vista以上系统修改本地时间需要管理员权限,所以要用管理员权限打开开发工具,后续运行效验器时也要用管理员权限运行.

实现:

1 获得标准北京时间

 WebRequest wrt = null;

            WebResponse wrp = null;

      

            wrt = WebRequest.Create("http://www.time.ac.cn/timeflash.asp?user=flash");

            wrt.Credentials = CredentialCache.DefaultCredentials;

            wrp = wrt.GetResponse();

            StreamReader sr = new StreamReader(wrp.GetResponseStream(), Encoding.UTF8);

2 解析时间

            string html = sr.ReadToEnd();

            XElement root = XElement.Parse(html);

            XElement element = root.Element("time");

            int year = int.Parse(element.Element("year").Value);

            int month = int.Parse(element.Element("month").Value);

            int day = int.Parse(element.Element("day").Value);

            int hour = int.Parse(element.Element("hour").Value);

            int minite = int.Parse(element.Element("minite").Value);

            int second = int.Parse(element.Element("second").Value);

3 修改本机系统时间

修改本机系统时间使用SetLocalTime Windows api实现.

首先设置结构体作为SetLocalTime的参数:

    [StructLayout(LayoutKind.Sequential)]

    public struct SystemTime {

        public ushort wYear;

        public ushort wMonth;

        public ushort wDayOfWeek;

        public ushort wDay;

        public ushort wHour;

        public ushort wMinute;

        public ushort wSecond;

        public ushort wMiliseconds;

    }

引入SetLocalTime 函数:

 [DllImport("Kernel32.dll")]

        public static extern bool SetLocalTime(ref SystemTime sysTime);

修改时间:

SystemTime sysTime = new SystemTime();

            sysTime.wYear = (ushort)year;

            sysTime.wMonth = (ushort)month;

            sysTime.wDay = (ushort)day;

            sysTime.wHour = (ushort)hour;

            sysTime.wMinute = (ushort)minite;

            sysTime.wSecond = (ushort)second;

            sysTime.wMiliseconds = 0;

            if (!SetLocalTime(ref sysTime))

            {

                Console.WriteLine("设置失败！");

            }

完整代码:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Net;
using System.IO;
using System.Xml;
using System.Xml.Linq;
using System.Runtime.InteropServices;


namespace Test
{

    [StructLayout(LayoutKind.Sequential)]
    public struct SystemTime { 
        public ushort wYear;
        public ushort wMonth; 
        public ushort wDayOfWeek; 
        public ushort wDay; 
        public ushort wHour; 
        public ushort wMinute; 
        public ushort wSecond; 
        public ushort wMiliseconds; 
    }

    class Program
    {
        [DllImport("Kernel32.dll")]
        public static extern bool SetSystemTime(ref SystemTime sysTime);
        [DllImport("Kernel32.dll")]
        public static extern bool SetLocalTime(ref SystemTime sysTime);
 
        static void Main(string[] args)
        {
            
            WebRequest wrt = null;
            WebResponse wrp = null;
       
            wrt = WebRequest.Create("http://www.time.ac.cn/timeflash.asp?user=flash");
            wrt.Credentials = CredentialCache.DefaultCredentials;

            wrp = wrt.GetResponse();


            StreamReader sr = new StreamReader(wrp.GetResponseStream(), Encoding.UTF8);
           
            
            string html = sr.ReadToEnd();
            XElement root = XElement.Parse(html);
            XElement element = root.Element("time");
            int year = int.Parse(element.Element("year").Value);
            int month = int.Parse(element.Element("month").Value);
            int day = int.Parse(element.Element("day").Value);
            int hour = int.Parse(element.Element("hour").Value);
            int minite = int.Parse(element.Element("minite").Value);
            int second = int.Parse(element.Element("second").Value);

            SystemTime sysTime = new SystemTime();
            sysTime.wYear = (ushort)year;
            sysTime.wMonth = (ushort)month;
            sysTime.wDay = (ushort)day;
            sysTime.wHour = (ushort)hour;
            sysTime.wMinute = (ushort)minite;
            sysTime.wSecond = (ushort)second;
            sysTime.wMiliseconds = 0;

            if (!SetLocalTime(ref sysTime))
            {
                Console.WriteLine("设置失败！");
            }

 //           Console.WriteLine(year);
  //          Console.WriteLine(root.Element("month").Value);
       

            sr.Close();
            wrp.Close();

            Console.WriteLine("现在时间：{0}年{1}月{2}日 {3}:{4}:{5}",year,month,day,hour,minite,second);
            Console.ReadKey();
        }
    }
}