Programming Forums > Application Development > Visual Basic .NET

masanovic · Nov 29th, 2004, 9:29 AM

Hi all, Can anyone shed like on how I can validate a textbox to make sure its in the format hh.mm?

Ooble · Nov 29th, 2004, 12:09 PM

You could do:

Private Sub Text1_LostFocus()
   Dim error As Boolean
   Dim x As Integer
   
   If Len(Text1.Text) <> 5 Then
     error = True
   Else
     For x = 1 To Len(Text1.Text)
       If x <> 3 And IsDigit(Mid(Text1.Text, x, 1)) = False Then
         error = True
       ElseIf x = 3 And Mid(Text1.Text, x, 1) <> ":" Then
         error = True
       EndIf
   EndIf
  
  If error = True Then
    MsgBox "Error: please enter the data in the format HH:MM.", vbError, "Error"
   EndIf
End Sub

There's definitely a few bugs in this code and it's written for VB6, but it should give you an insight into what you need to do.

Nov 29th, 2004, 12:09 PM	#2
Ooble I eat cake for breakfast. Join Date: Jul 2004 Location: In my box. Posts: 4,434 Rep Power: 9	You could do: (Toggle Plain Text) Private Sub Text1_LostFocus() Dim error As Boolean Dim x As Integer If Len(Text1.Text) <> 5 Then error = True Else For x = 1 To Len(Text1.Text) If x <> 3 And IsDigit(Mid(Text1.Text, x, 1)) = False Then error = True ElseIf x = 3 And Mid(Text1.Text, x, 1) <> ":" Then error = True EndIf EndIf If error = True Then MsgBox "Error: please enter the data in the format HH:MM.", vbError, "Error" EndIf End Sub Private Sub Text1_LostFocus() Dim error As Boolean Dim x As Integer If Len(Text1.Text) <> 5 Then error = True Else For x = 1 To Len(Text1.Text) If x <> 3 And IsDigit(Mid(Text1.Text, x, 1)) = False Then error = True ElseIf x = 3 And Mid(Text1.Text, x, 1) <> ":" Then error = True EndIf EndIf If error = True Then MsgBox "Error: please enter the data in the format HH:MM.", vbError, "Error" EndIf End Sub There's definitely a few bugs in this code and it's written for VB6, but it should give you an insight into what you need to do. __________________ Me :: You :: Them

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Nov 29th, 2004, 9:29 AM	#1
masanovic Newbie Join Date: Nov 2004 Posts: 6 Rep Power: 0	Hi all, Can anyone shed like on how I can validate a textbox to make sure its in the format hh.mm?

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Programming Forums > Application Development > Visual Basic .NET

How To Validate A Text Box With Hh.mm