Datetime picker in VB.net

Hi,
I have 4 datetime picker objects on my win form.
On form load I would like to set those 4 datetime pickers like:
1. First picker as first date of the current month
2. Second picker as last date of current month
3. third picker as last date of previous month
4. Forth picker as first date of previous month...

Can someone help me to make this working. I would appreciate your time and effort a lot.
Thanks.
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alsamAsked:
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DhaestCommented:
1. dateTimePicker1.Value = new DateTime(dateTime.Year, dateTime.Month, 1);2. DateTime firstDayOfTheMonth = new DateTime(dateTime.Year, dateTime.Month, 1);    dateTimePicker2.Value  = firstDayOfTheMonth.AddMonths(1).AddDays(-1);3. DateTime firstDayOfTheMonth = new DateTime(dateTime.Year, dateTime.Month, 1);   firstDayOfTheMonth.AddMonths(-1);    dateTimePicker2.Value  = new firstDayOfTheMonth.AddMonths(1).AddDays(-1);4. DateTime firstDayOfTheMonth = new DateTime(dateTime.Year, dateTime.Month, 1);   firstDayOfTheMonth.AddMonths(-1);    dateTimePicker2.Value  = new DateTime(firstDayOfTheMonth.Year, firstDayOfTheMonth.Month, 1);
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Mike TomlinsonMiddle School Assistant TeacherCommented:
You can do:
Public Class Form1

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim CurrentFirstOfMonth As New DateTime(DateTime.Today.Year, DateTime.Today.Month, 1)
        DateTimePicker1.Value = CurrentFirstOfMonth
        DateTimePicker2.Value = CurrentFirstOfMonth.AddMonths(1).AddDays(-1)
        DateTimePicker3.Value = CurrentFirstOfMonth.AddDays(-1)
        DateTimePicker4.Value = CurrentFirstOfMonth.AddMonths(-1)
    End Sub

End Class

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Meir RivkinFull stack Software EngineerCommented:
first day of current month:
DateTime firstDayOfCurrentMonth = new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1);

last day of current month:
DateTime lastDayOfCurrentMonth = new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day).AddMonths(1).AddDays(-1);

first day of previous month:
DateTime firstDayOfCurrentMonth = new DateTime(DateTime.Now.Year, DateTime.Now.Month-1, 1);

last day of previous month:
DateTime lastDayOfCurrentMonth = new DateTime(DateTime.Now.Year, DateTime.Now.Month-1, DateTime.Now.Day).AddMonths(1).AddDays(-1);

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John (Yiannis) ToutountzoglouInstructor Multiengine PilotCommented:
Simply you can use Dateserial like :
        Me.DateTimePicker1.Value = DateSerial(Year(Now), Month(Now), 1)
        Me.DateTimePicker2.Value = DateSerial(Year(Now), Month(Now) + 1, 1 - 1)
        Me.DateTimePicker3.Value = DateSerial(Year(Now), Month(Now), 1 - 1)
        Me.DateTimePicker4.Value = DateSerial(Year(Now), Month(Now) - 1, 1)

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magdy99Commented:
Public Class Form1

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim m, y As Integer

        m = DateTime.Now.Month
        y = DateTime.Now.Year
        Dim s As String = "#" & m & "/" & "1" & "/" & y & "#"
        Dim d As DateTime = CType(s, DateTime)
        '  First picker as first date of the current month

        DateTimePicker1.Value = d
        'Second picker as last date of current month
        If m = 1 Or m = 3 Or m = 5 Or m = 7 Or m = 8 Or m = 10 Or m = 12 Then
            Dim s2 As String = "#" & m & "/" & "31" & "/" & y & "#"
            Dim d2 As DateTime = CType(s2, DateTime)
            DateTimePicker2.Value = d2

        End If
        If m = 4 Or m = 6 Or m = 9 Or m = 11 Then
            Dim s2 As String = "#" & m & "/" & "30" & "/" & y & "#"
            Dim d2 As DateTime = CType(s2, DateTime)
            DateTimePicker2.Value = d2

        End If
        If m = 2 Then
            Dim s2 As String = "#" & m & "/" & "28" & "/" & y & "#"
            Dim d2 As DateTime = CType(s2, DateTime)
            DateTimePicker2.Value = d2

        End If
        'third picker as last date of previous month
        Dim s3 As String = "#" & m - 1 & "/" & "1" & "/" & y & "#"
        Dim d3 As DateTime = CType(s3, DateTime)
        DateTimePicker3.Value = d3
        'Forth picker as first date of previous month
        If m = 1 Or m = 3 Or m = 5 Or m = 7 Or m = 8 Or m = 10 Or m = 12 Then
            Dim s4 As String = "#" & m - 1 & "/" & "31" & "/" & y & "#"
            Dim d4 As DateTime = CType(s4, DateTime)
            DateTimePicker4.Value = d4
        End If
        If m = 4 Or m = 6 Or m = 9 Or m = 11 Then
            Dim s4 As String = "#" & m - 1 & "/" & "31" & "/" & y & "#"
            Dim d4 As DateTime = CType(s4, DateTime)
            DateTimePicker4.Value = d4
        End If
        If m = 2 Then
            Dim s4 As String = "#" & m - 1 & "/" & "31" & "/" & y & "#"
            Dim d4 As DateTime = CType(s4, DateTime)
            DateTimePicker4.Value = d4
        End If
    End Sub
End Class
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Mike TomlinsonMiddle School Assistant TeacherCommented:
Good grief magdy99....  =\
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Meir RivkinFull stack Software EngineerCommented:
if current month is january, you should update the Year part.
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Mike TomlinsonMiddle School Assistant TeacherCommented:
...who is that directed at sedgwick?
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Meir RivkinFull stack Software EngineerCommented:
my bad.
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