public void DateRange()
{
DateRangeStruct dates = pastDate.DateRange(DateRangeOptions.Week);
Assert.AreEqual("31-DEC-2017", dates.startDate.DateFormat(DateFormats.European));
Assert.AreEqual("06-JAN-2018", dates.endDate.DateFormat(DateFormats.European));
}
/// <summary><![CDATA[
/// Returns a struct with a start and end date for a given start date and interval.
/// ]]></summary>
/// <example>
/// If you pass the current date, and wish to know the first
/// and last days of the week based on the current day:
/// <code><![CDATA[
/// DateRangeStruct result = DateTime.Now.DateRange(TemporalHelpers.DateRangeOptions.Week);
/// Response.Write ("The first day of the week is " + result.startDate.ToString() +
/// ", and the last day of the week is " + result.endDate.ToString());
/// ]]></code>
/// </example>
/// <param name="relativeDate">Date to use as the basis for calculating the start and end date of the range.</param>
/// <param name="dateRangeOptions">Enumeration value specifying which abstracted date range to evaluate. Note, weeks begin on Sunday and end on Saturday.</param>
/// <returns>DateTimeStruct with the start and end date of the range.</returns>
public static DateRangeStruct DateRange(this DateTime relativeDate, DateRangeOptions dateRangeOptions)
{
DateTime[] dates = { DateTime.Today, DateTime.Today };
DateTime myDate = relativeDate;
switch (dateRangeOptions)
{
case DateRangeOptions.Week:
if (myDate.DayOfWeek > 0)
{
myDate = myDate.AddDays(-1 * Convert.ToInt32(myDate.DayOfWeek));
}
dates[0] = myDate;
dates[1] = myDate.AddDays(6);
break;
case DateRangeOptions.Month:
if (myDate.Day > 1)
{
myDate = myDate.AddDays(-1 * (myDate.Day - 1));
}
dates[0] = myDate;
dates[1] = myDate.AddMonths(1);
dates[1] = dates[1].AddDays(-1);
break;
case DateRangeOptions.Quarter:
if (myDate.Month < 4)
{
dates[0] = Convert.ToDateTime("1/1/" + myDate.Year.ToString());
}
if (myDate.Month > 3 && myDate.Month < 7)
{
dates[0] = Convert.ToDateTime("4/1/" + myDate.Year.ToString());
}
if (myDate.Month > 6 && myDate.Month < 10)
{
dates[0] = Convert.ToDateTime("7/1/" + myDate.Year.ToString());
}
if (myDate.Month > 9)
{
dates[0] = Convert.ToDateTime("10/1/" + myDate.Year.ToString());
}
dates[1] = dates[0].AddMonths(3);
dates[1] = dates[1].AddDays(-1);
break;
case DateRangeOptions.Year:
dates[0] = Convert.ToDateTime("1/1/" + myDate.Year.ToString());
dates[1] = Convert.ToDateTime("12/31/" + myDate.Year.ToString());
break;
}
DateRangeStruct result = new DateRangeStruct();
result.startDate = dates[0];
result.endDate = dates[1];
return(result);
}
