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How to compare DataSet value to a Date enter.

Posted on 2011-02-10
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Last Modified: 2012-05-11
How do I compare Date enterd to a DataSet in the code below:
'Warn user if the Posted entered is a future date.
        If UtilityClass.UnmaskDate(Me.fPostedDate.Text) = Nothing Then
            'nothing to check, bail out
            Exit Sub
        End If
'Error Here
        Select Case (UtilityClass.UnmaskDate(Me.fPostedDate.Text) = Format(PaymentsDataSet.Tables(0).Rows(I).Item("PostedDate"), "MM/dd/yy"))
            Case False
                Exit Sub
            Case True
                Select Case LastNewFinRecord
                    Case 0
                        ' there is not a new finance record id yet. leave it alone
                    Case CInt(Me.fFinRecID.Text)
                        If UtilityClass.UnmaskDate(Me.fPostedDate.Text) = Nothing Then
                            'nothing to check, bail out
                            Exit Sub
                        Else
                            ' Is the Posted Date greater than Today.
                            If (DateTime.Parse(UtilityClass.UnmaskDate(Me.fPostedDate.Text))) > DateTime.Parse(UtilityClass.UnmaskDate(Today)) Then
                                Select Case MessageBox.Show("This Date is in the FUTURE" & vbCrLf & "Is that correct.", "Incorrect Posted Date", MessageBoxButtons.YesNo, MessageBoxIcon.Exclamation)
                                    Case vbYes
                                        Me.fPostMarkDate.Focus()
                                    Case vbNo
                                        Me.fPostedDate.Focus()
                                End Select
                            End If
                        End If
                    Case Else
                End Select
        End Select

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I get Arguement expression is not valid value.
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Question by:pelon_80
2 Comments
 
LVL 9

Accepted Solution

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skipper68 earned 2000 total points
ID: 34867454
It appears that there may be some values that are "null" (empty). What would you like to do with them?  To confirm, you can display a message box before the line it's failing on to determine this.

If there are nulls in the data, then you should check to see if it is = DBNull.Value before you try to use it in any function or before casting them ( CInt () ).

if Me.xx.Text <> DBNull.Value Then
     'Do Something
else
     'Do Something Else
End If

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Author Closing Comment

by:pelon_80
ID: 34871682
Great! Thanks
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