How to suppress page reload by setting pager PageIndex

[mrozik]

I have store and I handle sorting, paging, filtering by myself on server side:

<ext:Store ID="storeTransportOrderList" runat="server" AutoLoad="true" RemoteSort="true"
*       OnRefreshData="StoreTransportOrder_Refresh">
*       <Reader>
*           <ext:JsonReader ReaderID="Id">
*               <Fields>
*                   <ext:RecordField Name="Checked" />
*                   <ext:RecordField Name="Id" />
*                   <ext:RecordField Name="StartDate" Type="Date" />
*                   <ext:RecordField Name="EndDate" Type="Date" />
*                   <ext:RecordField Name="TransportRouteCount" Type="Int" />
*                   <ext:RecordField Name="Route" />
*                   <ext:RecordField Name="Cost" Type="Float" />
*                   <ext:RecordField Name="RouteDescription" />
*                   <ext:RecordField Name="TransportCompanyName" />
*                   <ext:RecordField Name="StateName" />
*                   <ext:RecordField Name="ModifiedUserName" />
*                   <ext:RecordField Name="ModificationDate" Type="Date" />
*                   <ext:RecordField Name="StatusIndicator" />
*               </Fields>
*           </ext:JsonReader>
*       </Reader>
*       <Proxy>
*           <ext:DataSourceProxy />
*       </Proxy>
*       <AutoLoadParams>
*           <ext:Parameter Name="start" Value="={0}" />
*           <ext:Parameter Name="limit" Value="={20}" />
*       </AutoLoadParams>
*       <SortInfo Direction="DESC" Field="Id" />
*      *
*   </ext:Store>

In OnRefreshData handler I check or total count of reded data is lower than current (page * page size) and I want to set my page to 1:

*	MyQuery query = new MyQuery();
*       query.Start = e.Start;
*       query.Limit = e.Limit;
* 
*	this.storeTransportOrderList.DataSource = MyDatabaseServiceClass.VTransportOrderFindAll(query);


*e.TotalCount = query.Count;
*	if (query.Count < e.Start) //filtering causes there is no data on this page - jump to 1 page
*		PagingToolbarTransportOrder.SetPageIndex(0);
*	*
*	 this.storeTransportOrderList.DataBind(); 
*

everything works fine but after I call

PagingToolbarTransportOrder.SetPageIndex(0);

*OnRefreshData handler fires once again ....
*(supressing and resuming events not works for example:
*

*PagingToolbarTransportOrder.SuspendEvents();
*PagingToolbarTransportOrder.SetPageIndex(0);
*PagingToolbarTransportOrder.ResumeEvents();
*

*- I tried it on pager, store, gridPanel...)


*

How to prevent event firing after Pager.PageIndex change? Users are often confused when they see 'page 24 of 1' - but twice reaload makes performance of my application worse...


*Mrozik
*

[Vladimir]

Hi,

Because you use DataSourceProxy paging will be performed on server always. Therefore when you set new page the Store always send request to the server to retrieve page data.


Just use SetPageIndex only. No need bind data and call SetPageIndex because SetPageIndex initiate request itrself