设置当前时间的问题，这样写为什么没有效果呢？

Question

SystemTime的成员都要赋初值吧？我不是很懂

Answer 1

try to use SetSystemTime[StructLayout(LayoutKind.Sequential)]
public class SYSTEMTIME {
 public Int16 wYear;
 public Int16 wMonth;
 public Int16 wDayOfWeek;
 public Int16 wDay;
 public Int16 wHour;
 public Int16 wMinute;
 public Int16 wSecond;
 public Int16 wMilliseconds;
} [DllImport("kernel32.dll")]
  public static extern bool SetSystemTime([In,
MarshalAs(UnmanagedType.LPStruct)]SYSTEMTIME lpSystemTime);
  [DllImport("kernel32.dll")]
  public static extern void GetSystemTime([Out,
MarshalAs(UnmanagedType.LPStruct)]SYSTEMTIME lpSystemTime);

Answer 2

谢谢 saucer(思归, MS .NET MVP)  ，原来要先GetSystemTime才有效呀 ：）
SYSTEMTIME s=new SYSTEMTIME();
LibWrap.GetSystemTime(s);
         //Console.WriteLine("Current SystemTime is {0} ",s.wYear);
s.wYear=1999;
s.wMonth=10;
s.wHour=10;
LibWrap.SetSystemTime(s);