Dnn Additional Tab Settings module

gistfile1.cs

    public partial class PageSettings : System.Web.UI.UserControl {
        protected override void OnPreRender(EventArgs e) {
            base.OnPreRender(e);
            if (Page.IsPostBack && PageUtil.IsPageValidated() && Page.IsValid &&
                Page.Request.Params.Get(Page.postEventSourceID).Contains("cmdUpdate")) {

                //cmdUpdate_click postback event occurred
                var Tabs = new TabsController();
                Tabs.UpdateTabSetting(TabId, "MyNewSetting", MySetting.Text);
            }
        }

        public int TabId { 
            get {
                return PortalSettings.Current.ActiveTab.TabID;
            }
        }
    }


    public class PageUtil {
        public static bool IsPageValidated() {
            var page = HttpContext.Current.Handler as Page;
            if (page == null)
                return false;
            FieldInfo fieldValidated = typeof(Page).GetField("_validated", BindingFlags.Instance | BindingFlags.NonPublic);
            if (fieldValidated != null) return (bool)fieldValidated.GetValue(page);
            return false;
        }
    }