Delegation Issues in VB.NET

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Hello All,

I have a form and I want to ensure that none of the input fields should be left blank and the txtUPrice should hold only numeric values.

The below is the code that I devised.

Initially when I checked for focus issues (Initial IF structure) it went fine. But when I implemented numeric checking (Second IF structure), the system is not responding. However I am able to type and can move to the next text box. If I try ignoring input in any of the box, it is not showing the error provider and I am stuck in the same box (because of focus method). What went wrong in my code? Is there any conflict between first IF and second IF structures?

Please help.

VB

Private Sub ValidateFields(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtProdID.Leave, txtProdDesc.Leave, txtUOM.Leave, txtUPrice.Leave, txtVendor.Leave
        Dim x As TextBox
        x = sender
        If x.Text = "" Then
            x.Focus()
            ErrPvdr.SetError(x, "Cannot be a blank input")
        Else
            ErrPvdr.Clear()
        End If
        If x.Name = "txtuprice" And (Not IsNumeric(x.Text)) Then
            x.Focus()
            ErrPvdr.SetError(x, "Cannot be a non numeric value")
        Else
            ErrPvdr.Clear()
        End If
    End Sub

Posted 5-Jan-12 23:49pm

Nara Har

Updated 5-Jan-12 23:59pm

Estys

v3

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Comments

Sergey Alexandrovich Kryukov 6-Jan-12 5:59am

Where is "delegation"?
--SA

Nara Har 6-Jan-12 6:03am

The delegation is internally handled by .NET.

1 solution

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Estys · Accepted Answer · 2012-01-06T00:06:00

Solution 1

Yes, your second "if" is messing things up.
Try

VB

If x.Text = "" Then
    x.Focus()
    ErrPvdr.SetError(x, "Cannot be a blank input")
ElseIf x.Name = "txtUprice" And (Not IsNumeric(x.Text)) Then
    x.Focus()
    ErrPvdr.SetError(x, "Cannot be a non numeric value")
Else
    ErrPvdr.Clear()
End If

Cheers

Posted 6-Jan-12 0:06am

Estys

Comments

Nara Har 6-Jan-12 6:17am

Thank you this worked

Estys 6-Jan-12 6:22am

Thanks for your feedback, it's always nice to know whether something worked or not.