CODEWITHSUNDEEP
asp.netvb.net
BillyHoel Joel
BillyHoel Joel

Reputation: 21

Validating Date on Date Time Now

Hi i am trying to validate my through a textbox control for asp.

I want it to vaildate whether its empty, a date that is today or in the future not the past, and that the date format is correct MM/DD/YYY.

I have wrote this code for that:

    If String.IsNullOrEmpty(txtPickupDate.Text) Then
        lblError.Text = lblError.Text & "<BR>You must enter in the field Pickup Date."
        lblError.Visible = True
        rtn = False
    Else

        If txtPickupDate.Text > DateTime.Now.ToString("MM/DD/YYYY") Then
            lblError.Text = lblError.Text & "<BR>You must enter in a valid date for Pickup."
            lblError.Visible = True
            rtn = False
        Else
            Dim Pickup As Date
            If Date.TryParseExact(txtPickupDate.Text.ToString(), "mm/dd/yyyy", _
                                  System.Globalization.CultureInfo.CurrentCulture, _
                                  Globalization.DateTimeStyles.None, Pickup) Then
            Else
                lblError.Text = lblError.Text & "<BR>You must enter the Pickup Date in the format of MM/DD/YYYY."
                lblError.Visible = True
                rtn = False
            End If
        End If
    End If

However it does not work on the

If txtPickupDate.Text > DateTime.Now.ToString("MM/DD/YYYY") Then

Upvotes: 1

Views: 262

Answers (2)

Jason Faulkner
Jason Faulkner

Reputation: 6568

Try this. It will validate that a parse-able date was entered and then check only the date portion for determining whether or not it is in the past, present, or future.

Dim enteredDate As DateTime
If Not DateTime.TryParse(txtPickupDate.Text, enteredDate) Then
    ' Invalid date entered.
Else
    ' Valid date entered.
    ' Validate against the date part only.
    If enteredDate.Date < DateTime.Today Then
        ' Date is in the past.
    Else
        ' Date is today or in the future.
    End If
End If

Upvotes: 1

BillyHoel Joel
BillyHoel Joel

Reputation: 21

I ended up doing this:

    Dim Today As String = DateTime.Today.ToString("MM/dd/yyyy")

    'Due Date 
    If String.IsNullOrEmpty(txtPickupDate.Text) Then
        lblError.Text = lblError.Text & "<BR>You must enter in the field Pickup Date."
        lblError.Visible = True
        rtn = False
    Else

        If txtPickupDate.Text < Today Then
            lblError.Text = lblError.Text & "<BR>You must enter in a valid date for Pickup Date."
            lblError.Visible = True
            rtn = False
        Else
            Dim Pickup As Date
            If Date.TryParseExact(txtPickupDate.Text.ToString(), "MM/dd/yyyy", _
                                  System.Globalization.CultureInfo.CurrentCulture, _
                                  Globalization.DateTimeStyles.None, Pickup) Then
            Else
                lblError.Text = lblError.Text & "<BR>You must enter the Pickup Date in the format of MM/DD/YYYY."
                lblError.Visible = True
                rtn = False
            End If
        End If
    End If

Upvotes: 0

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