textbox focus in vb.net

Question

_{Wednesday, March 2, 2016 1:05 AM}

Hai

I Have four TextBoxes . If Textbox1 is empty or null and if I press Entre, the focus of the textbox cant move and I want to blink the cusrsor on the same textbox. How ?

 I use the following code,

 Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress

        If TextBox1.Text = "" And (e.KeyChar = Convert.ToChar(Keys.Enter)) Then
            Me.TextBox1.Focus()
            TextBox1.SelectAll()

        End If

end sub

All replies (4)

_{Monday, March 7, 2016 3:09 PM ✅Answered}

Try this to blink it yellow

 Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress

        If TextBox1.Text = "" And (e.KeyChar = Convert.ToChar(Keys.Enter)) Then
            'Me.TextBox1.Focus()
            'TextBox1.SelectAll()

            Debug.Print("Enter on empty txb1")
            Dim textboxOriginalBackgroundColor As New Color
            textboxOriginalBackgroundColor = TextBox1.BackColor
            'Change it to Yellow to wanr of empty box
            TextBox1.BackColor = Color.Yellow
            'Wait for 1 second 'remember Imports System.Threading
            TextBox1.Refresh()
            Thread.Sleep(500)
            'Change back
            TextBox1.BackColor = textboxOriginalBackgroundColor
        Else
            'Process normal

        End If

    End Sub

---

_{Wednesday, March 2, 2016 2:15 AM}

Hi,

I'm afraid you've made a typing error. It would be "TextBox2", instead of "TextBox1".

Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) _
            Handles TextBox1.KeyPress
        If TextBox1.Text = "" And (e.KeyChar = Convert.ToChar(Keys.Enter)) Then
            Me.TextBox2.Focus()
            Me.TextBox2.SelectAll()
    End If
end sub

Regards.

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_{Monday, March 7, 2016 2:54 PM}

No Sir, If Textbox1 is null or empty then  focus should be in the same textbox, ie textbox1.

---

_{Monday, March 7, 2016 3:05 PM}

 stopping cursor in Textbox1 until and unless user enters some value.