Simple date validation in vb.net

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i wanted to validate date and it should not accept less than 02 june 2014 .
here i have mention static date ("01-04-2014") but it will come any date format
i am doing something wrong...unable to find out

VB

Dim dtDate As DateTime
      dtDate = Convert.ToDateTime("01-04-2014") 
      If (dtDate.Year >= DateTime.Now.Year) Then
          If (dtDate.Day <= 1) And (dtDate.Month <= 6) Then
              MesgBox("Date and month should not less than  2 June ")
              Return False
          End If
      Else
          MesgBox("Year should be in the present Year ")
          Return False
      End If

please help???

Posted 28-Apr-14 2:54am

Amol Jadhao

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[no name] 28-Apr-14 9:01am

You probably want DateTime.ParseExact. But I would suggest that you are probably doing this wrong. It almost looks like you are going to try and validate a user entered textbox text as a date/time. Use a DateTimePicker or similar control instead.

Amol Jadhao 28-Apr-14 9:02am

date comming properly but condition is wrong

2 solutions

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Peter Leow · Accepted Answer · 2014-04-28T03:37:00

Solution 3

Since you mention free format, then you should use DateTime.TryParse Method[^] to validate that the input is a valid date.
However, I suggest you use a datepicker or calender control which will always returns a valid date, then no need for validation.

Posted 28-Apr-14 3:37am

Peter Leow

v2

Tejas Vaishnav · Accepted Answer · 2014-04-28T03:22:00

can you please check it out below code...

VB

'add your date format here, which ever you need to parse
       ' here i have added one, but if you are getting date in different format then you need to add that formte in formats array
       Dim formats As String() = New String() {"dd-MM-yyyy", "MM-dd-yyyy"}

       Dim dtDate As DateTime
       If DateTime.TryParseExact("01-04-2014", formats, CultureInfo.InvariantCulture, DateTimeStyles.None, dtDate) Then
           dtDate = Convert.ToDateTime("01-04-2014")
           If (dtDate.Year >= DateTime.Now.Year) Then
               If (dtDate.Day <= 1) And (dtDate.Month <= 6) Then
                   MesgBox("Date and month should not less than  2 June ")
                   Return False
               End If
           Else
               MesgBox("Year should be in the present Year ")
               Return False
           End If
       Else
           MesgBox("please check your date")
           Return False
       End If