Assigning event TextChanged to all textboxes in Form

Question

Hello I was wondering how can I keep an eye on all textboxes in Form whether in any of them was changed value. I saw some code here

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Answer 1

You need another loop for the groupbox and panels, you can use this code:

private void addEvents(Control.ControlCollection ct)
{
    foreach (Control ctrl in ct)
    {
        if (ctrl is TextBox)
        {
            TextBox tb = (TextBox)ctrl;
            tb.TextChanged += new EventHandler(tb_TextChanged);
        }
        else if (ctrl is GroupBox || ctrl is Panel) addEvents(ctrl.Controls);
    }
}

private void Form1_Load(object sender, EventArgs e)
{
    addEvents(this.Controls);
}

void tb_TextChanged(object sender, EventArgs e)
{
    TextBox tb = (TextBox)sender;
    tb.Tag = "CHANGED"; // or whatever
}