Stop the Bell on CTRL-A (WinForms)

Question

Any ideas how to stop the system bell from sounding when CTRL-A is used to select text in a Winforms application?

Here\'s the problem. Create a

Answer 1

    private void textBox1_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.Control && e.KeyCode == Keys.A)
        {
            this.textBox1.SelectAll();
            e.SuppressKeyPress = true;
        }
    }

hope this helps

Answer 2

This worked for me:

Set the KeyPreview on the Form to True.

Hope that helps.

Answer 3

@H7O solution is good, but I improved it a bit for multiply TextBox components on the form.

private void textBox_KeyDown(object sender, KeyEventArgs e)
{
  if (e.Control && e.KeyCode == Keys.A)
  {
    ((TextBox)sender).SelectAll();
    e.SuppressKeyPress = true;
  }
}

Answer 4

Thanks to an MSDN Forum post - this problem only occurs when textboxes are in multiline mode and you'd like to implement Ctrl+A for select all.

Here's the solution

protected override bool ProcessCmdKey(ref Message msg, Keys keyData) 
{
  if (keyData == (Keys.A | Keys.Control)) {
    txtContent.SelectionStart = 0;
    txtContent.SelectionLength = txtContent.Text.Length;
    txtContent.Focus();
    return true;
  }
  return base.ProcessCmdKey(ref msg, keyData);
}