Question

visual basic 6.0 datetimepicker properties

Asked by: xayent

i am writing a code that reads data from database and turns it to the user. my problem is on regional settings .normally my regional settings format on date "."  so  "dd.mm.yyyy"  i can write and read no problem . but when i changed it to english regional settings it fails. the regional settings on date is "/" on English so date is coming "dd/mm/yyyy"
i wrote a code below that works fine with "."    , but on "/" it is not. i tried to change the format it doesn't accept.thanks

                    txtbalgam.Value = txtbalgam.ToolTipText         gives invalid property value here
coming data 08/13/2008             03.08.2008

by the way, "ta" is the  coming value from system's  regional settings.

If ta = "." Then
             txtbalgam.Value = rspersonelara.Fields("trhbalgam").Value
             ElseIf ta = "/" Then
             txtbalgam.value= Format(rspersonelara.Fields("trhbalgam").Value, "mm" & ta & "dd" & ta & "yyyy")
             
    
             End If

                                  
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Asked On
2009-08-14 at 02:48:15ID24652398
Topic

Visual Basic Programming

Participating Experts
2
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Comments
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Answers

 

by: ladarlingPosted on 2009-08-14 at 06:35:12ID: 25097781

So, do you want all dates to be in the format 'dd.mm.yyyy', or are you wanting the datetimepicker to accept a date in either format: 'mm/dd/yyyy' and 'dd.mm.yyyy' ?

 

 

by: craisinPosted on 2009-08-15 at 22:13:30ID: 25107846

I am assuming that the value you are working on is a text value.

You cannot change the underlying Windows setting for date values unless you change the systems International settings, which is NEVER  a good practice. Should your program "crash" or the user leaves the program to work on another program, the settings on the host PC will have changed and produce problems for the user.

Instead you need to convert internally within your program by a call to a function such as the one I have written for you called

If your value is NOT text but a date, you have problems which cannot be fixed unless you use API calls.

Hope the code makes sense. It is just a sample, but the main   part is the call to the function  sNewDate.

You can test it by creating a new project, placing a text box on it called txtBalGam

 

Option Explicit
Private Sub main()
  Form1.Show
  MsgBox "Press Enter to change the format"
  'Now change the format
  Test "/"
  End
End Sub
 
Sub Test(ta As String)
 With Form1.txtBalGam
   If ta = "." Then
     .Text = sNewDate(.Text, "DMY", "MM.DD.YYYY")
   ElseIf ta = "/" Then
     'just to prive you can pass lowercase parameter if you want
     .Text = sNewDate(.Text, "dmy", "DD/MM/YYYY")
     MsgBox "Press Enter again for a different format"
     .Text = sNewDate(.Text, "dmy", "DD/MM/YY")
     MsgBox "Press Enter again for a different format"
     .Text = sNewDate(.Text, "dmy", "MM/DD/YYYY")
     MsgBox "Press Enter again for a different format"
     .Text = sNewDate(.Text, "mdy", "yyyy.mm.dd")
     MsgBox "...and back to the original format"
     .Text = sNewDate(.Text, "ymd", "MM.DD.YYYY")
   End If
 End With
End Sub
 
Public Function sNewDate(cDateStr As String, cOld As String, cNew As String) as String
 
'call this function by passing the following parameterd
' cDateStr :string to be converted,
' cOld     :the OLD format as a 3 character code ONLY
'           (e.g. "MDY" or "DMY")
' cNew     :the final format desired in full 
'           e.g. dd/mm/yy or mm/dd/yyyy or yyyy.mm.dd
 
  Dim nAt As Integer
  Dim cParts() As String
  Dim cOldParts(2) As String
  Dim cNewParts(2) As String
  Dim cDelim As String
  Dim nLen As Integer
  Const DD = 0
  Const MM = 1
  Const YY = 2
  
  cOld = UCase(cOld)
  If Len(cOld) > 3 Then
    MsgBox "Error in call to strNewDtFormat"
    sNewDate = cDateStr
    Exit Function
  End If
  
  cNew = UCase(cNew)
  
  nLen = Len(cDateStr)
  For nAt = 1 To nLen
    cDelim = Mid$(cDateStr, nAt, 1)
    If InStr("0123456789", cDelim) = 0 Then
      Exit For
    End If
  Next
  cParts = Split(cDateStr, cDelim)
  If UBound(cParts) > 2 Then
    MsgBox "Error in call to strNewDtFormat"
    sNewDate = cDateStr
    Exit Function
  End If
  Select Case cOld
    Case "DMY"
      cOldParts(DD) = cParts(0)
      cOldParts(MM) = cParts(1)
      cOldParts(YY) = cParts(2)
    Case "MDY"
      cOldParts(MM) = cParts(0)
      cOldParts(DD) = cParts(1)
      cOldParts(YY) = cParts(2)
    Case "YDM"
      cOldParts(YY) = cParts(0)
      cOldParts(DD) = cParts(1)
      cOldParts(MM) = cParts(2)
    Case "YMD"
      cOldParts(YY) = cParts(0)
      cOldParts(MM) = cParts(1)
      cOldParts(DD) = cParts(2)
  End Select
 
  nLen = Len(cNew)
  For nAt = 1 To nLen
    cDelim = Mid$(cNew, nAt, 1)
    If InStr("DMY", cDelim) = 0 Then
      Exit For
    End If
  Next
  cParts = Split(cNew, cDelim)
  If UBound(cParts) > 2 Then
    MsgBox "Error in call to strNewDtFormat"
    sNewDate = cDateStr
    Exit Function
  End If
  For nAt = 0 To 2
    If InStr(cParts(nAt), "D") > 0 Then
      cNewParts(nAt) = cOldParts(DD)
    Else
      If InStr(cParts(nAt), "M") > 0 Then
        cNewParts(nAt) = cOldParts(MM)
      Else
        If InStr(cParts(nAt), "Y") > 0 Then
          cNewParts(nAt) = cOldParts(YY)
          'sometimes between conversion the "century" is lost
          'so we will have to assume it is the current century that is required
          If Len(cNewParts(nAt)) = 2 Then
            cNewParts(nAt) = Left(CStr(Year(Now)), 2) + cNewParts(nAt)
          End If
        End If
        If Len(cParts(nAt)) = 2 Then
          cNewParts(nAt) = Right(cNewParts(nAt), 2)
        End If
      End If
    End If
  Next
  sNewDate = cNewParts(0) + cDelim + cNewParts(1) + cDelim + cNewParts(2)
End Function
                                              
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