Count of Week between

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Hi All,

I have to dropdown. Each dropdown contain week and year values (Ex.1-2006). I want to count the weeks and the count want to display in textboxes in vb.net and also while pageload dropdown should automatically display the current week and year. (Ex.this week is 27th week and 2011 year.)

So both dropdown should display 27-2011 while page load.

How to do this.

1) I want to count no of weeks in between seleted dropdown.(1-2006 to 5-2007) 1 and 5 is the week for the corresponding year.

2) I want to display the current week is by default in the dropdown while page load.

My weeks starts from Monday to sunday.

Thanks in advance for the help.

Regards,
Ganesh.S

Posted 8-Jul-11 0:47am

gani7787

Updated 8-Jul-11 1:11am

Slacker007

v3

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Slacker007 8-Jul-11 7:11am

Edited for some readability and format.

3 solutions

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Prerak Patel · Answer 1 · 2011-07-08T01:14:00

I don't know why I am answering this!! :doh:
Did you even try?

    Dim result as Integer
    Dim s1 As String = "5-2007"
    Dim s2 As String = "42-2011"
    If (Convert.ToInt16(s2.Split("-")(1)) < Convert.ToInt16(s1.Split("-")(1))) _
    OrElse ((Convert.ToInt16(s2.Split("-")(1)) = Convert.ToInt16(s1.Split("-")(1))) And (Convert.ToInt16(s2.Split("-")(0)) <= Convert.ToInt16(s1.Split("-")(0)))) Then
      'error
    ElseIf (Convert.ToInt16(s2.Split("-")(1)) = Convert.ToInt16(s1.Split("-")(1))) Then
      result=MsgBox(Convert.ToInt16(s2.Split("-")(0)) - Convert.ToInt16(s1.Split("-")(0)))
    Else
      Dim weeks1 As Integer = (52 - Convert.ToInt16(s1.Split("-")(0)))
      Dim weeks2 As Integer = (Convert.ToInt16(s2.Split("-")(0)))
      result=(52 * (Convert.ToInt16(s2.Split("-")(1)) - Convert.ToInt16(s1.Split("-")(1)) - 1) + weeks1 + weeks2)
    End If
'result is the weeks

Dim dfi As Globalization.DateTimeFormatInfo = Globalization.DateTimeFormatInfo.CurrentInfo
Dim cal As Globalization.Calendar = dfi.Calendar
'Your current value should be
'(cal.GetWeekOfYear(Today, Globalization.CalendarWeekRule.FirstFourDayWeek, DayOfWeek.Monday) & "-" & Today.Year)

Sudhir Kumar Srivastava lko · Answer 2 · 2011-07-08T01:23:00

Solution 2

This is logic, why do u need help.

Posted 8-Jul-11 1:23am

Sudhir Kumar Srivastava lko

fjdiewornncalwe · Answer 3 · 2011-07-08T01:25:00

Solution 3

You may be able to use something from Time Period Library for .NET[^]. You would likely have to modify something here, but it could help you along the way.

Posted 8-Jul-11 1:25am

fjdiewornncalwe