Navigation issues

[James Shelton Agar]

There are a problem regarding to navigation and history point for me.

The needdatasource seems to be called prior than scriptmanager's Navigate event, thus when i addhistorypoint when changing page, view detail, and click the back button, it will reload twice and start with page 0 then the previous page.

any suggestions?

The design of grid as follows

                    <telerik:RadGrid SkinID="GridSkin" ID="AListingsGrid" runat="server" AllowPaging="True"
                        AutoGenerateColumns="False" GridLines="None" AllowSorting="True" PageSize="10"
                        ShowStatusBar="True" AllowCustomPaging="True" ShowHeader="false" ShowDesignTimeSmartTagMessage="False"
                        EnableViewState="False">
                        <headercontextmenu enabletheming="True">
                            <CollapseAnimation Type="OutQuint" Duration="200"></CollapseAnimation>
                        </headercontextmenu>
                        <pagerstyle alwaysvisible="false" mode="NextPrevAndNumeric" seopagingquerystringkey="CurrentPage" />
                        <mastertableview allowcustomsorting="True" cellspacing="-1" enableviewstate="False">
                            <SortExpressions>
                            </SortExpressions>
                            <Columns>
                                <telerik:GridTemplateColumn UniqueName="Image">
                                    <ItemTemplate>
                                        <asp:Panel ID="PanelListings" runat="server" CssClass="display">
                                            <div class="PImg">
                                                <asp:HyperLink ID="lnkImghyper" runat="server">
                                                    <div class="ListingImg">
                                                        <div class="propertyImg">
                                                            <asp:Image ID="ImageListingPhoto" runat="server" />
                                                        </div>
                                                        <asp:Image CssClass="PSoldImg" ID="imgSold" runat="server" ImageUrl="~/Images/sold.gif"
                                                            Visible="false" />
                                                    </div>
                                                </asp:HyperLink>
                                            </div>
                                            <div id="PropertyInfo">
                                                <span class="price">
                                                    <asp:Label ID="LblPrice" runat="server" Text="Label"></asp:Label></span> <span class="PropertyAdd">
                                                        <asp:HyperLink ID="lnkGridSuburb" runat="server" Font-Bold="true"></asp:HyperLink>
                                                    </span>
                                                <br class="clear" />
                                                <asp:Label ID="lblAddress" CssClass="lstAddress" runat="server"></asp:Label>
                                                <div class="adCopyTitle">
                                                    <asp:HyperLink ID="lnkAd" runat="server" Font-Bold="true"></asp:HyperLink>
                                                </div>
                                                <table class="listingsIcon">
                                                    <tr>
                                                        <asp:Panel runat="server" ID="pnlBed">
                                                            <td>
                                                                <asp:Label runat="server" ID="lblbed"></asp:Label>
                                                                <asp:Image ID="Image6" runat="server" ImageUrl="~/Images/Stock/ADBed.png" alt=""
                                                                    CssClass="propertiesIcon" />
                                                            </td>
                                                        </asp:Panel>
                                                        <asp:Panel runat="server" ID="pnlBath">
                                                            <td>
                                                                <asp:Label runat="server" ID="lblShower"></asp:Label>
                                                                <asp:Image ID="Image5" runat="server" ImageUrl="~/Images/Stock/ADBath.png" alt=""
                                                                    CssClass="propertiesIcon" />
                                                            </td>
                                                        </asp:Panel>
                                                        <asp:Panel ID="pnlStudy" runat="server">
                                                            <td>
                                                                <asp:Label ID="lblStudy" runat="server" Text=""></asp:Label>
                                                                <asp:Image ID="Image11" runat="server" ImageUrl="~/Images/Stock/ADStudy.png" alt=""
                                                                    CssClass="propertiesIcon" />
                                                            </td>
                                                        </asp:Panel>
                                                        <asp:Panel ID="PnlLivingIcon" runat="server" Visible="false">
                                                            <td>
                                                                <asp:Label ID="LblCountLivingRoom" runat="server"></asp:Label>
                                                                <asp:Image ID="Image4" runat="server" ImageUrl="~/Images/Stock/ADLounge.png" alt=""
                                                                    CssClass="propertiesIcon" />
                                                            </td>
                                                        </asp:Panel>
                                                        <asp:Panel ID="pnlshowArea" runat="server">
                                                            <td>
                                                                <asp:Label ID="lblshowArea" runat="server"></asp:Label>
                                                                <asp:Image ID="Image12" runat="server" ImageUrl="~/Images/Stock/ADArea.png" alt=""
                                                                    CssClass="propertiesIcon" />
                                                            </td>
                                                        </asp:Panel>
                                                        <asp:Panel ID="PnlGarageIcon" runat="server">
                                                            <td>
                                                                <asp:Label ID="LblCountGarage" runat="server"></asp:Label>
                                                                <asp:Image ID="Image3" runat="server" ImageUrl="~/Images/Stock/ADGarage.png" alt=""
                                                                    CssClass="propertiesIcon" />
                                                            </td>
                                                        </asp:Panel>
                                                        <asp:Panel ID="PnlPoolIcon" runat="server">
                                                            <td>
                                                                <asp:Label ID="LblCountPool" runat="server"></asp:Label>
                                                                <asp:Image ID="Image2" runat="server" ImageUrl="~/Images/Stock/ADPool.png" alt=""
                                                                    CssClass="propertiesIcon" />
                                                            </td>
                                                        </asp:Panel>
                                                        <asp:Panel ID="PnlAirconIcon" runat="server" Visible="false">
                                                            <td>
                                                                <asp:Label ID="LblCountAircon" runat="server"></asp:Label>
                                                                <asp:Image ID="Image1" runat="server" ImageUrl="~/Images/Stock/aircon_icon.png" Width="30"
                                                                    alt="" CssClass="propertiesIcon" />
                                                            </td>
                                                        </asp:Panel>
                                                    </tr>
                                                </table>
                                                <div class="Pdetail">
                                                    <asp:Label CssClass="Pdetail" ID="lnkDetail" runat="server" />
                                                </div>
                                                <asp:Panel ID="Panel1" runat="server" Visible="false">
                                                    <span class="PTitle">ID#</span> <span class="PTitle">
                                                        <%#Eval("Href_No")%></span></asp:Panel>
                                            </div>
                                        </asp:Panel>
                                    </ItemTemplate>
                                </telerik:GridTemplateColumn>
                            </Columns>
                            <EditFormSettings>
                                <PopUpSettings ScrollBars="None" />
                            </EditFormSettings>
                        </mastertableview>
                        <clientsettings>
                            <Selecting AllowRowSelect="False" />
                            <Scrolling  AllowScroll="false" />
                        </clientsettings>
                        <filtermenu enabletheming="True">
                            <CollapseAnimation Type="OutQuint" Duration="200" />
                        </filtermenu>
                        <sortingsettings enableskinsortstyles="False" />
                        <statusbarsettings loadingtext="Loading Listings, please wait..." />
                    </telerik:RadGrid>

and code calling

Private Sub Page_Init(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Init
        'Add History handler
        Dim RadScriptManager1 = DirectCast(Me.Master.FindControl("RadScriptManager1"), RadScriptManager)
        AddHandler RadScriptManager1.Navigate, AddressOf RadScriptManager1_Navigate
    End Sub

    Private Sub AListingsGrid_NeedDataSource(ByVal source As Object, ByVal e As Telerik.Web.UI.GridNeedDataSourceEventArgs) Handles AListingsGrid.NeedDataSource
'Get datasource
end sub

    Private Sub RadScriptManager1_Navigate(ByVal sender As Object, ByVal e As System.Web.UI.HistoryEventArgs)
        If Not String.IsNullOrEmpty(e.State("CurrentPage")) Then
            AListingsGrid.CurrentPageIndex = CInt(e.State("CurrentPage"))
        Else
            AListingsGrid.CurrentPageIndex = 0
        End If
 AListingsGrid.DataSource = Nothing
        AListingsGrid.Rebind()
end sub

and live demo as follows

http://dev.oslweb.co.nz/properties.aspx?ltype=R

thanks

[Pavlina]

Hello James,

Please have in mind that you should never call the Rebind() method in a NeedDataSource event handler.You should never call DataBind() as well when using advanced data-binding through NeedDataSource.
Find more information in the following helps article:
Advanced Data-binding (using NeedDataSource event)

Sincerely yours,
Pavlina
the Telerik team

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[James Shelton Agar]

Hi, there was no Rebind() method in a NeedDataSource and no DataBind() as well when using advanced data-binding through NeedDataSource throughout the code. I just hide the codes which gets the data which is unnecessary to show.

I think it is asp.net's problem that's calling onload before onnavigate.

[Pavlina]

Hi James,

I suggest that you check on Page_Load if the page url contains current page key and if so you should set the proper current page index of RadGrid control.

I hope this helps.

Kind regards,
Pavlina
the Telerik team

Instantly find answers to your questions on the new Telerik Support Portal.
Watch a video on how to optimize your support resource searches and check out more tips on the blogs.