How to implement auto refresh functionality on the Web

Hi Konstantin,
Thanks… Yes, this solution performs a refresh. However, it is still not clear to me how to cope with this issue.
In the sample attached, the PagePreRender event is trapped, resulting in rendering the complete page (the timer_Tick event on the other hand is never fired).
Basically, what I'm trying to achieve is the same behavior as when clicking the Refresh button (updating the GridView).
The question is, how can I force the GridView (or more precisely, the panel containing teh GridView) to refresh on a timely basis???
Thanks, Ad.

Hi Ad,
Thank you for the feedback. I should apologize for the inconvenience because my previous project was not fully functional.
Please modify my previous controller as follows:

C#
public class MyViewController : ViewController<ListView> {  

       protected override void OnFrameAssigned() {  
           base.OnFrameAssigned();  
           if(Frame != null) {  
               if(Frame.Template != null) {  
                   ((Page)Frame.Template).Load += new EventHandler(MyViewController_Load);  
               }  
               else {  
                   Frame.TemplateChanged += new EventHandler(Frame_TemplateChanged);  
               }  
           }  
       }  

       void Frame_TemplateChanged(object sender, EventArgs e) {  
           if(Frame.Template != null) {  
               ((Page)Frame.Template).Load += new EventHandler(MyViewController_Load);  
           }  
       }  
       protected override void OnActivated() {  
           base.OnActivated();  
           timer.Enabled = true;  
       }  
       protected override void OnDeactivated() {  
           timer.Enabled = false;  
           base.OnDeactivated();  
       }  
       ASPxTimer timer;  
       void MyViewController_Load(object sender, EventArgs e) {  
           IMyCustomUpdatePanelHolder holder = Frame.Template as IMyCustomUpdatePanelHolder;  
           if(holder != null) {  
               timer = new ASPxTimer();  
               timer.Interval = 1000;  
               timer.ID = "timer";  
               timer.Enabled = false;  
               timer.Tick += new EventHandler(timer_Tick);  
               holder.UpdataPanel.Controls.Add(timer);  
           }  

       }  
       private void timer_Tick(object sender, EventArgs e) {  

       }  
       public MyViewController()  
           : base() {  
           TargetViewNesting = Nesting.Root;  
       }  
   }  

It seems to work fine in my tests. I look forward to hearing from you.
Thanks,
Konstantin M.

Hi Konstantin,
Based on your example I tried to make it work with the XafCallbackManager so the whole page wouldn’t reload, but just the gridview and actions (via ajax). I got this all to work using the following code.

C#
public partial class MyViewController  : ViewController<ListView>, IXafCallbackHandler  
    {  
        ASPxTimer _timer;  
        XafCallbackManager _callbackManager;  

        public MyViewController()  
            : base()  
        {  
            TargetViewNesting = Nesting.Root;  
            TargetViewType = ViewType.ListView;  
        }  

        protected override void OnFrameAssigned()  
        {  
            base.OnFrameAssigned();  
            if (Frame != null)  
            {  
                if (Frame.Template != null)  
                    ((Page)Frame.Template).Load += new EventHandler(MyViewController_Load);  
                else  
                    Frame.TemplateChanged += new EventHandler(Frame_TemplateChanged);  
            }  
        }  

        void Frame_TemplateChanged(object sender, EventArgs e)  
        {  
            if (Frame.Template != null)  
                ((Page)Frame.Template).Load += new EventHandler(MyViewController_Load);  
        }  

        protected override void OnActivated()  
        {  
            base.OnActivated();  

            if (View is ListView && View.IsRoot)  
            {  
                _callbackManager = GetCallbackManager();  
                _callbackManager.RegisterHandler("callbackHandler", this);  
                IMyCustomUpdatePanelHolder holder = Frame.Template as IMyCustomUpdatePanelHolder;  
                if (holder != null)  
                {  
                    _timer = new ASPxTimer();  
                    _timer.Interval = 1000;  
                    _timer.ID = "timer";  
                    _timer.Enabled = true;  
                    _timer.ClientSideEvents.Tick = "function(f, e) { " + _callbackManager.GetScript("callbackHandler", "") + "}";  
                    holder.UpdataPanel.Controls.Add(_timer);  
                }  
            }  
        }  

        protected override void OnDeactivated()  
        {  
            if (_timer != null)  
                _timer.Enabled = false;  
            base.OnDeactivated();  
        }  

        void MyViewController_Load(object sender, EventArgs e)  
        {  
            _callbackManager = GetCallbackManager();  
            _callbackManager.RegisterHandler("callbackHandler", this);  
        }  

        public void ProcessAction(string parameter)  
        {  
            if (View is ListView)  
            {  
                ((ListView)View).CollectionSource.Reload();  
                ObjectSpace.Refresh();  
            }  
        }  

        private XafCallbackManager GetCallbackManager()  
        {  
            XafCallbackManager manager = null;  
            if (Frame != null && Frame.Template != null)  
            {  
                ICallbackManagerHolder holder = Frame.Template as ICallbackManagerHolder;  
                if (holder != null)  
                {  
                    manager = holder.CallbackManager;  
                }  
            }  
            return manager;  
        }  
    }  

While this works when entering the ListView page, when I navigate to a detailView page, after I visited the ListView page the refresh ASPxTimer control is still executing. Can tell me how I can disable the ASPxTimer when I leave the page, or is this approach completely off ??
Thanks