C#中怎么调用SetSystemTime，我每次返回都是0(失败)，附代码，大家帮忙，急！

Question

传递进来的参数是合法的日期时间，但就是设置不成功。[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;
    }
    public class Win32
    {
        [DllImport("kernel32.dll", SetLastError = true)]
        static extern int SetSystemTime(ref SystemTime lpSystemTime);
        public static bool SetSystemTime(string strDateTime)
        {
            if (strDateTime.Length != 12)
            {
                return false;            }
            SystemTime sysTime = new SystemTime();
            sysTime.wYear = Convert.ToUInt16(strDateTime.Substring(0, 2));
            sysTime.wMonth = Convert.ToUInt16(strDateTime.Substring(2, 2));
            sysTime.wDay = Convert.ToUInt16(strDateTime.Substring(4, 2));
            sysTime.wHour = Convert.ToUInt16(strDateTime.Substring(6, 2));
            sysTime.wMinute = Convert.ToUInt16(strDateTime.Substring(8, 2));
            sysTime.wSecond = Convert.ToUInt16(strDateTime.Substring(10, 2));
            int flag = Win32.SetSystemTime(ref sysTime);
            return Convert.ToBoolean(flag);
        }
    }

Answer 1

lz：是你的这部分代码有问题：            sysTime.wYear = Convert.ToUInt16(strDateTime.Substring(0, 2));
            sysTime.wMonth = Convert.ToUInt16(strDateTime.Substring(2, 2));
            sysTime.wDay = Convert.ToUInt16(strDateTime.Substring(4, 2));
            sysTime.wHour = Convert.ToUInt16(strDateTime.Substring(6, 2));
            sysTime.wMinute = Convert.ToUInt16(strDateTime.Substring(8, 2));
            sysTime.wSecond = Convert.ToUInt16(strDateTime.Substring(10, 2));我做了个实验：[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;
    }
    public class MyClass
    {
        [DllImport("kernel32.dll", SetLastError = true)]
        static extern int GetSystemTime(ref SystemTime lpSystemTime);        [DllImport("kernel32.dll", SetLastError = true)]
        static extern int SetSystemTime(ref SystemTime lpSystemTime);        public static int GetTime(ref SystemTime lpSystemTime)
        {
            return GetSystemTime(ref lpSystemTime);
        }        public static bool SetTime(ref SystemTime lpSystemTime)
        {
            int flag = SetSystemTime(ref lpSystemTime);
            return Convert.ToBoolean(flag);
        }
    }
        private void button1_Click(object sender, EventArgs e)
        {
            SystemTime time = new SystemTime();
            MyClass.GetTime(ref time);            bool b = MyClass.SetTime(ref time);
        }程序完全正确！你仔细检查那部分代码，年月日时分秒都有限制的！！