C# Time Class using MySQL

http://www.csharphelp.com/2007/09/c-time-class/

 /*
  datatypes.

 Time class is writen in C# and .NET 2.0.

 Time class explantation.

 This is simple class and is not much to explain.

 1.Public fields:
 .public int Hour,
 .public int Minute and
 .public int Second.
 .public const char TIME_SEPERATOR = ':'

 2.Constructors:
 .current system time (public Time()),
 .from string value (public Time(string value)),
 .from parameters (public Time(int hour, int minute, int second)) and
 .from seconds (public Time(int seconds)).

 3.
 Public method Add:

 Example 1:

 InDoc.Systems.Time time1 = new InDoc.Systems.Time("12:00:55");
 // calculate 12:00:55 + 14:55:20
 time1.Add("14:55:20");
 // result: 26:56:15

 4. To addition two times you can use + and to subtraction you can use -.
 Example 2:

 InDoc.Systems.Time time1 = new InDoc.Systems.Time("12:00:55") +
 new InDoc.Systems.Time("14:55:20");
 // result: 26:56:15

 InDoc.Systems.Time time2 = new InDoc.Systems.Time("14:55:20") .
 new InDoc.Systems.Time("12:00:55");
 // result: 02:54:25

 5. We have some convert methods:

 .public int ToSeconds(),
 .public override string ToString()

 and static method that convert secontd to Time object:
 .public static Time GetTimeFromSeconds(int seconds).
  */

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;

 namespace MysqlBig
 {

     /// <summary>
     ///
     /// </summary>
     public class Time
     {
         #region Public constants

         public const char TIME_SEPERATOR = ':';

         #endregion

         #region Declarations

         public int Hour;
         public int Minute;
         public int Second;

         #endregion

         #region Constructors

         /// <summary>
         /// Create time object from current system time.
         /// </summary>
         public Time()
         {
             Hour = DateTime.Now.Hour;
             Minute = DateTime.Now.Minute;
             Second = DateTime.Now.Second;
         }

         /// <summary>
         /// Create time object from string value must be seperated as TIME_SEPERATOR constant.
         /// </summary>
         /// <param name="value"></param>
         public Time(string value)
         {
             string[] vals = value.Split(TIME_SEPERATOR); //new char[] { ':' });
             Hour = int.Parse(vals[]);
             Minute = int.Parse(vals[]);

             if (vals.Length > )
                 Second = int.Parse(vals[]);

             new Time(this.ToSeconds());
         }

         /// <summary>
         /// Create time object from parameters hour, minute and seconds.
         /// </summary>
         /// <param name="hour"></param>
         /// <param name="minute"></param>
         /// <param name="second"></param>
         public Time(int hour, int minute, int second)
         {
             Hour = hour;
             Minute = minute;
             Second = second;
             new Time(this.ToSeconds());
         }

         /// <summary>
         /// Create time object from seconds.
         /// </summary>
         /// <param name="seconds"></param>
         public Time(int seconds)
         {
             Minute = seconds / ;
             Second = seconds % ;

             Hour = Minute / ;
             Minute = Minute % ;
         }

         #endregion

         #region Public methods

         /// <summary>
         /// Add new time object and addition (+) it to previus time object.
         /// </summary>
         /// <param name="time"></param>
         /// <returns></returns>
         public Time Add(Time time)
         {
             this.Hour += time.Hour;
             this.Minute += time.Minute;
             this.Second += time.Second;

             return new Time(GetStringTime(this.ToSeconds()));
         }

         /// <summary>
         /// Add new string value and addition (+) it to previus time object.
         /// </summary>
         /// <param name="value"></param>
         /// <returns></returns>
         public Time Add(string value)
         {
             return Add(new Time(value));
         }

         #endregion

         #region Public static methods

         /// <summary>
         /// Get current system time.
         /// </summary>
         /// <returns></returns>
         public static Time Now()
         {
             DateTime dt = DateTime.Now;
             return GetTimeFromSeconds(ToSeconds(dt));
         }

         /// <summary>
         /// Calculate time difference between two time objects.
         /// </summary>
         /// <param name="time1"></param>
         /// <param name="time2"></param>
         /// <returns></returns>
         public static Time TimeDiff(Time time1, Time time2)
         {
             try
             {
                 int _secs1 = time1.ToSeconds();
                 int _secs2 = time2.ToSeconds();

                 int _secs = _secs1 - _secs2;

                 return GetTimeFromSeconds(_secs);
             }
             catch
             {
                 return new Time(, , );
             }

         }

         /// <summary>
         /// Calculate time difference between two string values.
         /// </summary>
         /// <param name="time1"></param>
         /// <param name="time2"></param>
         /// <returns></returns>
         public static Time TimeDiff(string time1, string time2)
         {
             try
             {
                 Time t1 = new Time(time1);
                 Time t2 = new Time(time2);
                 return TimeDiff(t1, t2);
             }
             catch
             {
                 return new Time(, , );
             }
         }

         /// <summary>
         /// Calculate time difference between two DateTime objects.
         /// </summary>
         /// <param name="dateTime1"></param>
         /// <param name="dateTime2"></param>
         /// <returns></returns>
         public static Time TimeDiff(DateTime dateTime1, DateTime dateTime2)
         {
             try
             {
                 TimeSpan span = dateTime1 - dateTime2;
                 return new Time(span.Seconds);
             }
             catch
             {
                 return new Time(, , );
             }
         }

         /// <summary>
         /// Calculate time difference between two second values.
         /// </summary>
         /// <param name="seconds1"></param>
         /// <param name="seconds2"></param>
         /// <returns></returns>
         public static Time TimeDiff(int seconds1, int seconds2)
         {
             try
             {
                 Time t1 = new Time(seconds1);
                 Time t2 = new Time(seconds2);
                 return TimeDiff(t1, t2);
             }
             catch
             {
                 return new Time(, , );
             }
         }

         #endregion

         #region Convert methods

         /// <summary>
         /// Convert current time object to seconds.
         /// </summary>
         /// <returns></returns>
         public int ToSeconds()
         {
             return this.Hour *  + this.Minute *  + this.Second;
         }

         /// <summary>
         /// Convert DateTime object to seconds.
         /// </summary>
         /// <param name="dateTime"></param>
         /// <returns></returns>
         public static int ToSeconds(DateTime dateTime)
         {
             return dateTime.Hour *  + dateTime.Minute *  + dateTime.Second;
         }

         /// <summary>
         /// Convert current time object to string.
         /// </summary>
         /// <returns></returns>
         public override string ToString()
         {
             return String.Format("{0:00}:{1:00}:{2:00}", Hour, Minute, Second);
         }

         /// <summary>
         /// Convert seconds to time object.
         /// </summary>
         /// <param name="seconds"></param>
         /// <returns></returns>
         public static Time GetTimeFromSeconds(int seconds)
         {
             int _mins = seconds / ;
             seconds = seconds % ;

             int _hours = _mins / ;
             _mins = _mins % ;

             return new Time(_hours, _mins, seconds);
         }

         /// <summary>
         /// Convert seconds to string time.
         /// </summary>
         /// <param name="seconds"></param>
         /// <returns></returns>
         private string GetStringTime(int seconds)
         {
             int _mins = seconds / ;
             seconds = seconds % ;

             int _hours = _mins / ;
             _mins = _mins % ;

             this.Hour = _hours;
             this.Minute = _mins;
             this.Second = seconds;

             return String.Format("{0:00}:{1:00}:{2:00}", _hours, _mins, seconds); ;
         }

         /// <summary>
         /// Parse string to time.
         /// </summary>
         /// <param name="value"></param>
         /// <returns></returns>
         public static Time Parse(string value)
         {
             try
             {
                 return new Time(value);
             }
             catch
             {
                 throw new ApplicationException("Error parsing time!");
             }
         }

         #endregion

         #region Subtract time objects

         public static Time operator +(Time t1, Time t2)
         {
             Time t3 = new Time(t1.Hour, t1.Minute, t1.Second);
             t3.Add(t2);
             return t3;
         }

         public static Time operator -(Time t1, Time t2)
         {
             return TimeDiff(t1, t2);
         }

         #endregion
     }
 }

用法：

 /// <summary>
    ///
    /// </summary>
    public class AttendrecordInfo
    {

        int _Seq;

        public int Seq
        {
            set { _Seq = value; }
            get { return _Seq; }
        }
        string _Emp_no;

        public string Emp_no
        {
            set { _Emp_no = value; }
            get { return _Emp_no; }
        }

        DateTime _Rdate;

        public DateTime Rdate
        {
            set { _Rdate = value; }
            get { return _Rdate; }
        }

        Time _Ttime;

        public Time Ttime
        {
            set { _Ttime = value; }
            get { return _Ttime; }
        }
        string _Rdescription;

        public string Rdescription
        {
            set { _Rdescription = value; }
            get { return _Rdescription; }
        }
        string _Rdes_reasnon;

        public string Rdes_reasnon
        {
            set { _Rdes_reasnon = value; }
            get { return _Rdes_reasnon; }
        }

        string _Branch;

        public string Branch
        {
            set { _Branch = value; }
            get { return _Branch; }
        }

    }

      /// <summary>
        ///
        /// </summary>
        /// <param name="seq"></param>
        /// <returns></returns>
        public AttendrecordInfo SelectAttendrecord(int seq)
        {
            AttendrecordInfo attendrecord = null;
            try
            {
                MySqlParameter par = new MySqlParameter("?param1", MySqlDbType.Int32, );
                par.Value = seq;
                using (MySqlDataReader reader = MySqlHelpDu.GetReader("proc_Select_attendrecord", CommandType.StoredProcedure, par))
                {
                    if (reader.Read())
                    {
                        attendrecord = new AttendrecordInfo();
                        attendrecord.Seq = (!object.Equals(reader["seq"], null)) ? (int)reader["seq"] : ;
                        attendrecord.Branch = (!object.Equals(reader["branch"], null)) ? (string)reader["branch"] : "";
                        attendrecord.Emp_no = (!object.Equals(reader["emp_no"], null)) ? (string)reader["emp_no"] : "";
                        attendrecord.Rdate = (!object.Equals(reader["rdate"], null)) ? DateTime.Parse(reader["rdate"].ToString()): DateTime.Now;
                        attendrecord.Ttime = (!object.Equals(reader["rtime"], null)) ? Time.Parse(reader["rtime"].ToString()): Time.Now();
                        attendrecord.Rdes_reasnon = (!object.Equals(reader["rdes_reasnon"], null)) ? (string)reader["rdes_reasnon"] : "";
                        attendrecord.Rdescription = (!object.Equals(reader["rdescription"], null)) ? (string)reader["rdescription"] : "";

                    }
                }
            }
            catch (MySqlException ex)
            {
                throw ex;
            }
            return attendrecord;
        }

Mysql 表：

 create table attendrecord
 (
     seq  INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
     emp_no varchar(20) null,
     rdate datetime not null,
     rtime time not null,
     rdescription varchar(100),
     rdes_reasnon varchar(100),
     branch varchar(50)
 );

 insert into attendrecord(emp_no,rdate,rtime,rdescription,rdes_reasnon,branch) values('L00094','2015-03-10','10:45','geovindu','du','sz');