如何每隔一分钟修改一次系统时间?

somtv 2009-05-20 03:12:34

我想让程序每隔一段时间自动去修改一次系统时间,但出现了下面的情况:

例如:当前系统时间为 2008.08.10 23:58 时, 我想让系统时间增加30分钟
然后让系统时间变为:2008.08.11 00:28

但我的代码不知道应该如何去实现.
代码如下:



using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using System.Runtime.InteropServices;



namespace ChangeDataTime

{

    public partial class Form1 : Form

    {

        int i = 0;

        DateTime nowtime = new DateTime();

        public Form1()

        {

            InitializeComponent();





        }



        [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 day;

            public short hour;

            public short minute;

            public short second;

        }







        public static void SetDate(DateTime dt)

        {

            SYSTEMTIME st;

            st.year = (short)dt.Year;

            st.month = (short)dt.Month;

            st.day = (short)dt.Day;

            st.hour = (short)(dt.Hour + 1);

            st.minute = (short)(dt.Minute + 13);

            st.second = (short)(dt.Second);



            SetLocalTime(ref st);

        }







        private void button1_Click(object sender, EventArgs e)

        {

            timer1.Interval = 1000;

            timer1.Enabled = true;

        }



        private void timer1_Tick(object sender, EventArgs e)

        {

            nowtime = System.DateTime.Now;

            SetDate(nowtime);

        }



        private void button2_Click(object sender, EventArgs e)

        {

            timer1.Enabled = false;

        } 







    }

}