按enter键改变焦点控制

Question

I have a windows form, i need when user press Enter set focus to next control. Any idea how to achive this (without using Key Press events)

Answer 1

You can catch the KeyPreview of your form. Set KeyPreview to true in the constructor and then you can use this:

protected override bool ProcessKeyPreview(ref Message m)
{
    if (m.Msg == 0x0100 && (int)m.WParam == 13)
    {
        this.ProcessTabKey(true);
    }
    return base.ProcessKeyPreview(ref m);
}

Answer 2

You can use ProcessCmdKey checking if keyData contains the Enter Key then using the SelectNextControl Method to set your focus.

protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
    if (keyData.HasFlag(Keys.Enter)) 
    {
        SelectNextControl(ActiveControl,true,true,true,true);
        return true; //Stops the beeping
    }

    return base.ProcessCmdKey(ref msg, keyData);
}

Answer 3

If you dont want to use key press events you will have to override ProcessCmdKey

protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
    if (keyData == Keys.Return)
    {
        MessageBox.Show("You pressed the Enter key");
    }
    return base.ProcessCmdKey(ref msg, keyData);
}