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[Solved] row count change resets pagination

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Grid

This is a migrated thread and some comments may be shown as answers.

Teodorico asked on 21 Jul 2009, 02:40 AM

Hi,

I am facing the following scenario using client-side data binding:

1) User "A" gets a list of items and first page is displayed.
2) User "A" clicks next page and navigates to page 2 without any issues.
3) User "B" on another workstation adds a new item.
4) User "A" clicks next page to

    
            <telerik:RadGrid     
        
                ID="RadGrid"    
        
                runat="server"    
        
                AllowPaging="true"    
        
                PageSize="25"    
        
                Width="100%"    
        
                Height="100%"    
        
                style="border:0px;outline:none"    
        
                >    
        
                <MasterTableView TableLayout="Auto" ClientDataKeyNames="Id, Icon, IsPrivate">     
        
                    <Columns>    
        
                        <telerik:GridBoundColumn DataField="Icon" HeaderText="" HtmlEncode="false" HeaderStyle-Width="26px"></telerik:GridBoundColumn>    
        
                        <telerik:GridBoundColumn DataField="Name" HeaderText="Item" HtmlEncode="false" HeaderStyle-Width="100%"></telerik:GridBoundColumn>    
        
                    </Columns>    
        
                </MasterTableView>    
        
                <ClientSettings EnableRowHoverStyle="true">     
        
                    <Selecting AllowRowSelect="true" />    
        
                    <Scrolling AllowScroll="true" UseStaticHeaders="true" />    
        
                    <DataBinding Location="Grid.aspx" SelectMethod="Search" FilterParameterType="String" SortParameterType="String" ></DataBinding>     
        
                    <ClientEvents OnDataBinding="RadGrid_DataBinding" OnRowClick="RadGrid_RowClick" OnRowDblClick="RadGrid_RowDblClick" OnDataBound="RadGrid_DataBound" />    
        
                </ClientSettings>    
        
                <PagerStyle Mode="Slider" />    
        
            </telerik:RadGrid>

navigate to page 3, but the grid is reset to page 1.

I was able to pinpoint this to the fact that "count" changed. I can somehow understand a reason behind this, but in a multiuser environment this becomes really annoying for users.

Also, I noticed that the SelectMethod get called 3 times, one for page 3 and two times for page 0.

Is there a way to prevent this behavior.

Thanks.

3 Answers, 1 is accepted

answered on 23 Jul 2009, 10:33 PM

Lana,
I changed the method from:

    
            [WebMethod]  
        
            public static Helix.Flp.Web.Grid.ResultSet Search(int startRowIndex, int maximumRows, Helix.Flp.Core.Model.Food.FoodInfo.SearchCriteria criteria)

To:

    
            [WebMethod]  
        
            public Helix.Flp.Web.Grid.ResultSet Search(int startRowIndex, int maximumRows, Helix.Flp.Core.Model.Food.FoodInfo.SearchCriteria criteria)

But then I get a JavaScript exception:
Error: Sys.ArgumentException: Cannot deserialize. The data does not correspond to valid JSON.
Parameter name: data

Is there anything else I need to do?

Thanks.

answered on 27 Jul 2009, 11:52 AM

Hello Teodorico,

It seems I was wrong when asked to make the methods non-static. Please excuse me for misleading you.
However, an option the described behavior is if you are saving the CurrentPageIndex for the grid into a static variable. Could you please send me your WebService definition for further investigation?
Additionally, if you can provide a live Url where we could test the unexpected behavior might be of help.

Thank you for your cooperation.
Regards,
Iana
the Telerik team

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