/**/
/// <summary> /// Get the first day of a month /// </summary> /// <param name="datetime"> To get the time of the first day of the month </param> /// < returns></returns> 
Private
the DateTime FirstDayOfMonth (the DateTime datetime)
{ return datetime.AddDays ( . 1 - datetime.Day); } /// <Summary> /// acquired last day of a month /// </ Summary> /// <param name = "datetime"> To get the time of the last day of the month </param> /// <returns></returns>
...
/**/
Private
the DateTime LastDayOfMonth (the DateTime datetime)
{ return datetime.AddDays ( . 1 - datetime.Day) .AddMonths ( . 1 ) .AddDays ( - . 1 ); } /// <Summary> /// acquires the first day of the last month @ / </summary> /// <param name="datetime"> To get the current time of the first day of the previous month </param> /// <returns></returns>
...
/**/
Private
the DateTime FirstDayOfPreviousMonth (the DateTime datetime)
{ return datetime.AddDays ( . 1 - datetime.Day) .AddMonths ( - . 1 ); } /// <Summary> /// acquired last day of the last month /// </ Summary> /// <param name="datetime"> To get the current time of the last day of the previous month </param> /// <returns></returns>
...
/**/
private
DateTime LastDayOfPrdviousMonth(DateTime datetime)
...
{
return datetime.AddDays(1 - datetime.Day).AddDays(-1); }
Server time on the first day of last month ().AddMonths(-1).AddDays(1-Server time().Day).ToString("yyyy-MM-dd 00:00:00"); Server time on the
end of last month
() .AddDays(1-server time() .Day).AddDays(-1).ToString("yyyy-MM-dd 23:59:59");