private void spinEdit1_EditValueChanging(object sender, DevExpress.XtraEditors.Controls.ChangingEventArgs e)        {            string s = Convert.ToString(e.NewValue);            if (s == "")                return;            int index = s.IndexOf('.');            string sv = "";            if (index == -1)                sv = s;            else                sv = s.Substring(0, index);            int v = Convert.ToInt32(sv);            if (v < 1)                e.Cancel = true;        }