Visual Basic e.SuppressKeyPress Does Not Work When Clicking a Button with Button.PerformClick()

Question

I am trying to make my program press a button in the form if the "enter" key is pressed while in a specific text box.

I have used similar code to change focus between text boxes, and it works perfectly fine.

Private Sub TextBox1_KeyDown(sender As Object, e As KeyEventArgs) Handles TextBox1.KeyDown
    If e.KeyCode = Keys.Enter Then
        e.SuppressKeyPress = True
        TextBox2.Focus()
    End If
End Sub

In this instance, the Windows noise does not play, and the focus is changed from TextBox1 to TextBox2.

However, I tried to implement the same code while only changing one line.

Private Sub TextBox2_KeyDown(sender As Object, e As KeyEventArgs) Handles TextBox2.KeyDown
    If e.KeyCode = Keys.Enter Then
        e.SuppressKeyPress = True
        Button2.PerformClick()
    End If
End Sub

The "e.SuppressKeyPress = True" does not stop the Windows noise from playing.

I have researched this for about three hours now, and have come up empty handed multiple times. I have tried setting the button to the default "AcceptButton", but then when I press enter in ANY text box, then the button is pressed. I only want the button to be pressed if enter is pressed in TextBox2.

I should also mention, simply pressing the button does not make the noise. Only if the user presses "enter" in TextBox2.

EDIT 1 - I have tried to debug as best I can, and it appears to only be happening when the user presses enter.

Private Sub TextBox2_KeyDown(sender As Object, e As KeyEventArgs) Handles TextBox2.KeyDown
    If e.KeyCode = Keys.Enter Then
        e.SuppressKeyPress = True
    End If
End Sub

Removing the button click from the code (see above) makes the Windows noise stop. I'm completely at a loss here...

This is off the top of my head but what if you set e.Handled to True? — jmcilhinney
e.Handled (from what I understand) should only be used in KeyPress. Not KeyDown. Someone can correct me if I am wrong. And, I believe I have tried putting both already. — AyoDeath
By the way, the documentation clearly states that an application developer should call Select rather than Focus. Sometimes it makes no difference but other times it does. If you call Select then you don't have to know which are which. — jmcilhinney
A better answer is not to call PerformClick. Instead, refactor the code that occurs in the button click handler out into a separate method and then call that method from both the button click handler and from the TextBox2.KeyDown method. — Chris Dunaway

AyoDeath AyoDeath · Accepted Answer · 2017-03-10T07:14:54

I fixed the issue by changingPrivate Sub TextBox2_KeyDown(sender As Object, e As KeyEventArgs) Handles TextBox2.KeyDown to Private Sub TextBox1_KeyPress(sender As Object, e As KeyPressEventArgs) Handles TextBox1.KeyPressand only using e.Handled = true.

Visual Basic e.SuppressKeyPress Does Not Work When Clicking a Button with Button.PerformClick()

2 Answers