c# - 윈도우 시스템 날짜 변경 (관리자 권한)

using System.Diagnostics;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace ChangeDate
{
	public partial class Form1 : Form
	{
		[DllImport("kernel32")]
		private static extern long WritePrivateProfileString(string section, string key, string val, string filePath);
		[DllImport("kernel32")]
		private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);

		public Form1()
		{
			InitializeComponent();
		}


		private void Form1_Load(object sender, EventArgs e)
		{
			iniFIlePath = System.Windows.Forms.Application.StartupPath;
			// ini 읽기
			StringBuilder exeFilePath = new StringBuilder();
			StringBuilder datestr = new StringBuilder();
			StringBuilder autorun = new StringBuilder();

			GetPrivateProfileString("SETINGS", "FILEPATH", "", exeFilePath, 1024, iniFIlePath + "\\Setting.ini");
			textBox1.Text = exeFilePath.ToString();
			GetPrivateProfileString("SETINGS", "DATE", "", datestr, 1024, iniFIlePath + "\\Setting.ini");
			if (datestr.ToString() != "")
			{
				DateTime dtDate;
				dtDate = Convert.ToDateTime(datestr.ToString());
				dateTimePicker1.Value = dtDate;
			}
			
		}

		[StructLayoutAttribute(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 wMilliseconds;
		}

		[DllImport("kernel32.dll")]
		public static extern bool SetLocalTime(ref SYSTEMTIME time);

		public static bool SetSystemDateTime(DateTime dtNew)
		{
			bool bRtv = false;

			if (dtNew != DateTime.MinValue)
			{
				SYSTEMTIME st;

				st.wYear = (ushort)dtNew.Year;
				st.wMonth = (ushort)dtNew.Month;
				st.wDayOfWeek = (ushort)dtNew.DayOfWeek;    // Set명령일 경우 이 값은 무시된다.
				st.wDay = (ushort)dtNew.Day;
				st.wHour = (ushort)dtNew.Hour;
				st.wMinute = (ushort)dtNew.Minute;
				st.wSecond = (ushort)dtNew.Second;
				st.wMilliseconds = (ushort)dtNew.Millisecond;

				bRtv = SetLocalTime(ref st); ;    // UTC+0 시간을 설정한다.
																					// bRtv = YtnWin32.SetSystemTime(ref st);  // UTC + 표준시간대(대한민궁의 경우 UTC+9)를 설정한다.
			}

			return bRtv;
		}
		private void label6_Click(object sender, EventArgs e)
		{
			DateTime dt = DateTime.Now;
			dt = DateTime.Parse(dateTimePicker1.Value.ToString("yyyy MM dd") + DateTime.Now.ToString(" HH:mm:ss"));
			if (SetSystemDateTime(dt))
			{
				
				MessageBox.Show("변경 완료");
				
			}
			else
			{
				MessageBox.Show("시스템 시간 변경 권한이 없습니다. 관리자 권한으로 시작하십시오.");
			}
		}

		private void dateTimePicker1_ValueChanged(object sender, EventArgs e)
		{
			string datestr = dateTimePicker1.Value.ToString();
			WritePrivateProfileString("SETINGS", "DATE", datestr, iniFIlePath + "\\Setting.ini");
		}

}

 

윈도우 시스템의 날짜를 변경하고

변경된 날짜를 INI 파일에 저장했다가

다시 가져오는 코드