asked on

.net set focus on control without submitting form

I want to promp user to input resolution before submit a form. How can I set focus on the resolution textbox and without submitting form if the resolution textbox is empty.

The app is in vb.net, I think I need the code in vb.net. Thanks.

Barry62

Private Sub btnSubmit_Click(sender As Object, e As EventArgs) Handles btnSubmit.Click
if txtResolution.text = String.empty() Then
MessageBox.Show("Please enter a resolution", "No Resolution Entered", MessageBoxButtons.OK, MessageBoxIcon.Error);
Else
<Process Form...>
End If
End Sub

5281

ASKER

when I moved your code in my Visual Studio, somehow, I have error under String.Empty() and MessageBox

String.Empty() - Error 100 Argument not specified for parameter 'index' of 'Public ReadOnly Default Property Chars(index As Integer) As Char'.

MessageBox - Error 101 'MessageBox' is not declared. It may be inaccessible due to its protection level.

What happened? This is asp.net web application.

Barry62

Sorry, try changing the sub to Public.

You said it was vb.net

5281

ASKER

It is still same errors after change sub to Public.

ASKER CERTIFIED SOLUTION

Barry62

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5281

ASKER

That's what I thought too. I got it now. Thank you.