C# शुरू की तारीख और अंतिम तिथि आज की

Question

के आधार पर मैं एक गतिविधि तिथि के आधार पर नजर रखने के जो Today,YesterDay,this week,Last week,this month,last Month stackoverflow के समान है ..... कर रहा हूँ आज की तारीख इन सभी Today,YesterDay,this week,Last week,this month,last Month के लिए start-date और end-date पाने के लिए के आधार पर मिलता है सी # में?

Answer 1

DateTime baseDate = DateTime.Today; 

var today = baseDate; 
var yesterday = baseDate.AddDays(-1); 
var thisWeekStart = baseDate.AddDays(-(int)baseDate.DayOfWeek); 
var thisWeekEnd = thisWeekStart.AddDays(7).AddSeconds(-1); 
var lastWeekStart = thisWeekStart.AddDays(-7); 
var lastWeekEnd = thisWeekStart.AddSeconds(-1); 
var thisMonthStart = baseDate.AddDays(1 - baseDate.Day); 
var thisMonthEnd = thisMonthStart.AddMonths(1).AddSeconds(-1); 
var lastMonthStart = thisMonthStart.AddMonths(-1); 
var lastMonthEnd = thisMonthStart.AddSeconds(-1); 

Answer 2

public enum FrequencyType 
{ 
None = 0, 
Daily = 1, 
Weekly = 2, 
Monthly = 3, 
Quarterly = 4, 
Annually = 5, 
} 


private string[] GetRange(FrequencyType frequency, DateTime dateToCheck) 
{ 
string[] result = new string [2]; 
DateTime dateRangeBegin = dateToCheck; 
TimeSpan duration = new TimeSpan(0, 0, 0, 0); //One day 
DateTime dateRangeEnd = DateTime.Today.Add(duration); 

switch (frequency) 
{ 
    case FrequencyType.Daily: 
     dateRangeBegin = dateToCheck; 
     dateRangeEnd = dateRangeBegin; 
     break; 

    case FrequencyType.Weekly: 
     dateRangeBegin = dateToCheck.AddDays(-(int)dateToCheck.DayOfWeek); 
     dateRangeEnd = dateToCheck.AddDays(6 - (int)dateToCheck.DayOfWeek); 
     break; 

    case FrequencyType.Monthly: 
     duration = new TimeSpan(DateTime.DaysInMonth (dateToCheck.Year, dateToCheck.Month) - 1 , 0, 0, 0); 
     dateRangeBegin = dateToCheck.AddDays((-1) * dateToCheck.Day + 1); 
     dateRangeEnd = dateRangeBegin.Add(duration); 
     break; 

    case FrequencyType.Quarterly: 
     int currentQuater = (dateToCheck.Date.Month - 1)/3 + 1; 
     int daysInLastMonthOfQuarter = DateTime.DaysInMonth(dateToCheck.Year, 3 * currentQuater); 
     dateRangeBegin = new DateTime (dateToCheck.Year, 3 * currentQuater - 2, 1); 
     dateRangeEnd = new DateTime(dateToCheck.Year, 3 * currentQuater , daysInLastMonthOfQuarter); 
     break; 

    case FrequencyType.Annually: 
     dateRangeBegin = new DateTime(dateToCheck.Year, 1, 1); 
     dateRangeEnd = new DateTime(dateToCheck.Year, 12, 31); 
     break; 
} 
result[0] = dateRangeBegin.Date.ToString(); 
result[1] = dateRangeEnd.Date.ToString(); 
return result; 
} 

http://zamirsblog.blogspot.com/2010/02/find-first-and-last-date-of-given-week.html

Answer 3

मुझे आशा है कि यह मदद मिलेगी:

var begindate = new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1).ToString("MM/dd/yyyy"); 
Console.WriteLine("FIRST DAY OF THE CURRENT MONTH (begindate): " + begindate); 

var enddate=DateTime.Now.ToString("MM/dd/yyyy"); 
Console.WriteLine("TODAY'S DATE (enddate): " + enddate); 

var comparebegindate = new DateTime(DateTime.Now.Year, DateTime.Now.Month-1, 1).ToString("MM/dd/yyyy"); 
Console.WriteLine("FIRST DAY OF THE LAST MONTH (comparebegindate): " + comparebegindate); 

var comparedate = new DateTime(DateTime.Now.Year, DateTime.Now.Month - 1, DateTime.Now.Day).ToString("MM/dd/yyyy"); 
Console.WriteLine("TODAY'S DATE WITH LAST MONTH (comparedate): " + comparedate); 

var compareenddate = new DateTime(DateTime.Now.Year, DateTime.Now.Month - 1, DateTime.DaysInMonth(DateTime.Now.Year, DateTime.Now.Month)).ToString("MM/dd/yyyy"); 
Console.WriteLine("LAST MONTH'S LAST DATE (compareenddate): " + compareenddate);