Mega Code Archive

 

Categories / C# / Date Time

 

Converts a DateTime object into a unix timestamp number

using System; using System.IO; using System.Collections; using System.Text; using System.Text.RegularExpressions; using System.Xml.Serialization; namespace FlickrNet {     /// <summary>     /// Internal class providing certain utility functions to other classes.     /// </summary>     internal sealed class Utils     {         private static readonly DateTime unixStartDate = new DateTime(1970, 1, 1, 0, 0, 0);         /// <summary>         /// Converts a <see cref="DateTime"/> object into a unix timestamp number.         /// </summary>         /// <param name="date">The date to convert.</param>         /// <returns>A long for the number of seconds since 1st January 1970, as per unix specification.</returns>         internal static long DateToUnixTimestamp(DateTime date)         {             TimeSpan ts = date - unixStartDate;             return (long)ts.TotalSeconds;         }         /// <summary>         /// Converts a string, representing a unix timestamp number into a <see cref="DateTime"/> object.         /// </summary>         /// <param name="timestamp">The timestamp, as a string.</param>         /// <returns>The <see cref="DateTime"/> object the time represents.</returns>         internal static DateTime UnixTimestampToDate(string timestamp)         {             if (timestamp == null || timestamp.Length == 0) return DateTime.MinValue;             return UnixTimestampToDate(long.Parse(timestamp));         }         /// <summary>         /// Converts a <see cref="long"/>, representing a unix timestamp number into a <see cref="DateTime"/> object.         /// </summary>         /// <param name="timestamp">The unix timestamp.</param>         /// <returns>The <see cref="DateTime"/> object the time represents.</returns>         internal static DateTime UnixTimestampToDate(long timestamp)         {             return unixStartDate.AddSeconds(timestamp);         }     } }