void CboPersona_SelectedIndexChanged(object sender, Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs e)
{
if (CboPersona.SelectedValue != "")
{
string Dpi = ClUsuario.Get_DpiPersona(Convert.ToInt32(CboPersona.SelectedValue)).ToString();
TxtDpi.Text = Dpi.Substring(0, 4) + "-" + Dpi.Substring(4, 5) + "-" + Dpi.Substring(9, 4);
}
}