/// <summary>
/// Returns all the days of a datetime range.
/// </summary>
/// <param name="dateRange">The date range.</param>
/// <returns></returns>
public static IEnumerable <DateTime> DaysInRange(this IDateTimeRange dateRange)
{
return(Enumerable.Range(0, (dateRange.TimeSpan).Days)
.Select(offset => new DateTime(
dateRange.StartTime.AddDays(offset).Year,
dateRange.StartTime.AddDays(offset).Month,
dateRange.StartTime.AddDays(offset).Day)));
}
public static bool IsIn(this IDateTimeRange dateTimeRange, DateTime dateTime)
{
var isBeforeTo = dateTimeRange.To == DateTime.MaxValue ||
dateTimeRange.To > dateTime ||
(dateTimeRange.To.Date == dateTimeRange.To && dateTimeRange.To == dateTime);
var isAfterFrom = dateTimeRange.From == DateTime.MinValue ||
dateTimeRange.From <= dateTime;
return(isBeforeTo && isAfterFrom);
}
public void UpdateDateTimes(IDateTimeRange dateTimeRange)
{
var(startTime, endTime) = GetNewDateTimeRange(dateTimeRange);
bool isAdjusted = false;
StartTime = AdjustDateTime(startTime, ref isAdjusted);
EndTime = AdjustDateTime(endTime, ref isAdjusted);
if (isAdjusted)
{
string format = "ddd dd'/'MM'/'yyyy HH:mm:ss";
throw new Exception("Datetimes have been adjusted between "
+ DateTimeMin.ToString(format, CultureInfo.CreateSpecificCulture("en-US")) + " and "
+ DateTimeMax.ToString(format, CultureInfo.CreateSpecificCulture("en-US")));
}
}
/// <summary>
/// Creates a datetime conditional expression for MS SQL server.
/// </summary>
/// <param name="dateTimeRange">DateTime range.</param>
/// <param name="column">Column or datetime expression.</param>
/// <returns>Conditional expression for MS SQL server.</returns>
public static string GetMsSqlCondition(this IDateTimeRange dateTimeRange, string column)
{
var isFromDefined = dateTimeRange.From != DateTime.MinValue;
var isToDefined = dateTimeRange.To != DateTime.MaxValue;
var isInclusiveTo = isToDefined && dateTimeRange.To.Date != dateTimeRange.To;
var fromMsSqlLiteral = dateTimeRange.From.ToMsSqlLiteral();
var toMsSqlLiteral = dateTimeRange.To.ToMsSqlLiteral();
var isFromToInclusive = isFromDefined && isToDefined && isInclusiveTo;
if (isFromToInclusive)
{
return($"{column} BETWEEN {fromMsSqlLiteral} AND {toMsSqlLiteral}");
}
var isFromToExclusive = isFromDefined && isToDefined;
if (isFromToExclusive)
{
return($"{column} >= {fromMsSqlLiteral} AND {column} < {toMsSqlLiteral}");
}
var isOnlyFrom = isFromDefined;
if (isOnlyFrom)
{
return($"{column} >= {fromMsSqlLiteral}");
}
var isOnlyTo = isToDefined;
if (isOnlyTo)
{
return($"{column} {(isInclusiveTo ? "<=" : "<")} {toMsSqlLiteral}");
}
return($"{column} IS NOT NULL");
}
/// <summary>
/// Sets date range from given source.
/// </summary>
public static void SetFrom(this IDateTimeRange target, IDateTimeRange source)
{
target.StartTime = source.StartTime;
target.EndTime = source.EndTime;
}
/// <summary>
/// Sets date range to given target.
/// </summary>
/// <param name="source"></param>
/// <param name="target"></param>
public static void SetTo(this IDateTimeRange source, IDateTimeRange target)
{
target.StartTime = source.StartTime;
target.EndTime = source.EndTime;
}
/// <summary>
/// Creates a new <see cref="DateTimeRange"/> object from given <paramref name="dateTimeRange"/> object.
/// 根据给定的<paramref name="dateTimeRange"/>日期时间对象，创建一个<see cref="DateTimeRange"/>对象
/// </summary>
/// <param name="dateTimeRange">IDateTimeRange object 日期时间对象</param>
public DateTimeRange(IDateTimeRange dateTimeRange)
{
StartTime = dateTimeRange.StartTime;
EndTime = dateTimeRange.EndTime;
}
/// <summary>
/// Creates a new <see cref="DateTimeRange"/> object from given <paramref name="dateTimeRange"/> object.
/// </summary>
/// <param name="dateTimeRange">IDateTimeRange object</param>
public DateTimeRange(IDateTimeRange dateTimeRange)
{
StartTime = dateTimeRange.StartTime;
EndTime = dateTimeRange.EndTime;
}
/// <summary>
/// 初始化一个<see cref="DateTimeRange"/>类型的实例
/// </summary>
/// <param name="dateTimeRange">事件范围</param>
public DateTimeRange(IDateTimeRange dateTimeRange) : this(dateTimeRange.StartTime, dateTimeRange.EndTime)
{
}
/// <summary>
/// Creates a new <see cref="DateTimeRange"/> object from given <paramref name="dateTimeRange"/> object.
/// </summary>
/// <param name="dateTimeRange">IDateTimeRange object</param>
public DateTimeRange(IDateTimeRange dateTimeRange)
{
this.StartTime = dateTimeRange.StartTime;
this.EndTime = dateTimeRange.EndTime;
}
/// <summary>
/// Sets date range to given target.
/// </summary>
/// <param name="source"></param>
/// <param name="target"></param>
public static void SetTo(this IDateTimeRange source, IDateTimeRange target)
{
target.StartTime = source.StartTime;
target.EndTime = source.EndTime;
}
/// <summary>
/// Sets date range from given source.
/// </summary>
public static void SetFrom(this IDateTimeRange target, IDateTimeRange source)
{
target.StartTime = source.StartTime;
target.EndTime = source.EndTime;
}
private Tuple <DateTime, DateTime> GetNewDateTimeRange(IDateTimeRange dateTimeRange)
{
string dateTimeRangeId = dateTimeRange.Id;
DateTime now = DateTime.Now;
DateTime today = DateTime.Now.Date;
DateTime startTime = now;
DateTime endTime = now;
if (dateTimeRangeId == "pyear")
{
startTime = today.AddDays(-365);
endTime = today.AddTicks(-1);
}
else if (dateTimeRangeId == "pmonth")
{
startTime = today.AddDays(-30);
endTime = today.AddTicks(-1);
}
else if (dateTimeRangeId == "pweek")
{
startTime = today.AddDays(-7);
endTime = today.AddTicks(-1);
}
else if (dateTimeRangeId == "p24h")
{
startTime = today.AddHours(now.Hour - 24);
endTime = today.AddHours(now.Hour).AddTicks(-1);
}
else if (dateTimeRangeId == "n24h")
{
startTime = today.AddHours(now.Hour + 1);
endTime = startTime.AddHours(24).AddTicks(-1);
}
else if (dateTimeRangeId == "n36h")
{
startTime = today.AddHours(now.Hour + 1);
endTime = startTime.AddHours(36).AddTicks(-1);
}
else if (dateTimeRangeId == "n7d")
{
startTime = today.AddDays(1);
endTime = startTime.AddDays(7).AddTicks(-1);
}
else if (dateTimeRangeId == "n30d")
{
startTime = today.AddDays(1);
endTime = startTime.AddDays(30).AddTicks(-1);
}
else if (dateTimeRangeId == "lyear")
{
startTime = new DateTime(today.Year - 1, 1, 1);
endTime = startTime.AddYears(1).AddTicks(-1);
}
else if (dateTimeRangeId == "lmonth")
{
DateTime lastMonth = today.AddMonths(-1);
startTime = new DateTime(lastMonth.Year, lastMonth.Month, 1);
endTime = startTime.AddMonths(1).AddTicks(-1);
}
else if (dateTimeRangeId == "yesterday")
{
startTime = today.AddDays(-1);
endTime = startTime.AddDays(1).AddTicks(-1);
}
else if (dateTimeRangeId == "today")
{
startTime = today;
endTime = startTime.AddDays(1).AddTicks(-1);
}
else if (dateTimeRangeId == "tomorrow")
{
startTime = today.AddDays(1);
endTime = startTime.AddDays(1).AddTicks(-1);
}
else if (dateTimeRangeId == "tmonth")
{
startTime = new DateTime(today.Year, today.Month, 1);
endTime = startTime.AddMonths(1).AddTicks(-1);
}
else if (dateTimeRangeId == "tyear")
{
startTime = new DateTime(today.Year, 1, 1);
endTime = startTime.AddYears(1).AddTicks(-1);
}
return(new Tuple <DateTime, DateTime>(startTime, endTime));
}
public ZonedDateTimeRange(IDateTimeRange dateTimeRange, string timeZoneId) : base(dateTimeRange)
{
Timezone = timeZoneId;
}
public static bool Overlaps <TSource>(this TSource dateTimeRange, IDateTimeRange another, OverlapsInclude overlapsInclude = OverlapsInclude.None) where TSource : IDateTimeRange
{
return(dateTimeRange.Overlaps(another.Begin, another.End, overlapsInclude));
}
/// <summary>
/// 复制;
/// </summary>
/// <param name="dateRange"></param>
/// <param name="dest"></param>
public static void Copy(this IDateTimeRange dateRange, IDateTimeRange dest)
{
dest.BeginDateTime = dateRange.BeginDateTime;
dest.EndDateTime = dateRange.EndDateTime;
}