How do I determine if a date lies between current week dates?

Question

In C#,

How we are check certain date with in week dates?

Eg: 6/02/2014

Current Weeks: 02/02/2014 - 08/02/2014

so this dates are with in above wee

Answer 1

Use this for check (last parameter is optional if you want always 1 week from fromDate, you don't need use last parameter):

 public static bool DateInside(DateTime checkDate, 
     DateTime fromDate, DateTime? lastDate = null)
 {
     DateTime toDate = lastDate != null ? lastDate.Value : fromDate.AddDays(6d);
     return checkDate >= fromDate && checkDate <= toDate;
 }

To call use:

bool isDateInside = DateInside(new DateTime(2014, 02, 06), 
     new DateTime(2014, 02, 02)); // return true

And search first :) Answer is also here: How to check whether C# DateTime is within a range

If you want to check if the dates are inside the same week, then you can use this:

public static bool DateInsideOneWeek(DateTime checkDate, DateTime referenceDate)
{
    // get first day of week from your actual culture info, 
    DayOfWeek firstWeekDay = System.Globalization.CultureInfo.CurrentCulture.DateTimeFormat.FirstDayOfWeek;
    // or you can set exactly what you want: firstWeekDay = DayOfWeek.Monday;
    // calculate first day of week from your reference date
    DateTime startDateOfWeek = referenceDate;
    while(startDateOfWeek.DayOfWeek != firstWeekDay)
    { startDateOfWeek = startDateOfWeek.AddDays(-1d); }
    // fist day of week is find, then find last day of reference week
    DateTime endDateOfWeek = startDateOfWeek.AddDays(6d);
    // and check if checkDate is inside this period
    return checkDate >= startDateOfWeek && checkDate <= endDateOfWeek;
}

Actual week in my culture info start with monday, February 3th 2014 (so for me is week between February 3th and February 9th). If I check any date with reference date (second parameter) as today (2014-Feb-06) I get this results:

For 2014-Feb-02 (Sunday before this week): false
For 2014-Feb-03 (Monday inside this week): true
For 2014-Feb-06 (Today  inside this week): true
For 2014-Feb-09 (Sunday inside this week): true
For 2014-Feb-10 (Monday next        week): false

You can call this method to check if one date is inside the same week as referentional like this:

DateInsideOneWeek(new DateTime(2014, 02, 02), new DateTime(2014, 02, 06));

You can find current week start and end dates with this code:

DateTime startDateOfWeek = DateTime.Now.Date; // start with actual date
while(startDateOfWeek.DayOfWeek != DayOfWeek.Monday) // set first day of week in your country
{ startDateOfWeek = startDateOfWeek.AddDays(-1d); } // after this while loop you get first day of actual week
DateTime endDateOfWeek = startDateOfWeek.AddDays(6d); // you just find last week day

Is this you wanted?