C#通过Win32API设置客户端系统时间的方法详解

[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 wMilliseconds;
 
	public override string ToString()
	{
		return $"{wYear}-{wMonth}-{wDay} {wHour}:{wMinute}:{wSecond}.{wMilliseconds}";
	}
}

public class SysTimeHelper
{
	[DllImport("kernel32.dll")]
	public static extern bool SetSystemTime(ref SystemTime st);
 
	[DllImport("Kernel32.dll")]
	public static extern bool SetLocalTime(ref SystemTime st);
 
	[DllImport("Kernel32.dll")]
	public static extern void GetSystemTime(ref SystemTime st);
 
	[DllImport("Kernel32.dll")]
	public static extern void GetLocalTime(ref SystemTime st);
 
	public static string GetLocalTime()
	{
		SystemTime st = new SystemTime();
		GetLocalTime(ref st);
		return st.ToString();
	}
 
	public static bool SetLocalTimeByStr(string timestr)
	{
		bool flag = false;
		SystemTime sysTime = new SystemTime();
		DateTime dt = Convert.ToDateTime(timestr);
		sysTime.wYear = Convert.ToUInt16(dt.Year);
		sysTime.wMonth = Convert.ToUInt16(dt.Month);
		sysTime.wDay = Convert.ToUInt16(dt.Day);
		sysTime.wHour = Convert.ToUInt16(dt.Hour);
		sysTime.wMinute = Convert.ToUInt16(dt.Minute);
		sysTime.wSecond = Convert.ToUInt16(dt.Second);
		try
		{
			flag = SetLocalTime(ref sysTime);
		}
		catch (Exception ex)
		{
			string e = ex.Message;
			return false;
		}
		return flag;
	}
 
	/// <summary>        
	/// 时间戳转为C#格式时间        
	/// </summary>        
	/// <param name=”timeStamp”></param>        
	/// <returns></returns>        
	public static DateTime ConvertStringToDateTime(string timeStamp)
	{
		DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
		long lTime = long.Parse(timeStamp + "0000");
		TimeSpan toNow = new TimeSpan(lTime);
		return dtStart.Add(toNow);
	}
 
	/// <summary>
	/// 时间戳转为C#格式时间10位
	/// </summary>
	/// <param name="timeStamp">Unix时间戳格式</param>
	/// <returns>C#格式时间</returns>
	public static DateTime GetDateTimeFrom1970Ticks(long curSeconds)
	{
		DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
		return dtStart.AddSeconds(curSeconds);
	}
 
 
}

public partial class MainWindow : Window
{
	public MainWindow()
	{
		InitializeComponent();
	}
 
	private void Window_Loaded(object sender, RoutedEventArgs e)
	{
		var time = SysTimeHelper.GetLocalTime();
		this.txtTime.Text = time;
	}
 
	private void Button_Click(object sender, RoutedEventArgs e)
	{
		var time = this.txtTime.Text;
		bool flag = SysTimeHelper.SetLocalTimeByStr(time);
		if(flag)
		{
			MessageBox.Show("设置成功");
		}
		else
		{
			MessageBox.Show("设置失败");
		}
	}
}