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SEO paging Overview

SEO paging of RadDataPager gets better results on search engines. In order to use SEO paging of the RadDataPager control you need to set the AllowSEOPaging property to True. When it is False (its default value), the RadDataPager does not use SEO paging.

The SEO paging feature allows you to open a URL and directly land on the desired page of data.

When SEO paging is enabled, navigating through the pages or changing the page size will fire a GET request with a new querystring parameter for each SEO paged control. The querystring parameter is in the following format: pageName.aspx?controlID=pageIndex_pageSize. For example, GET /test-seo-paging.aspx?RadListView1=1_5 means that the page "test-seo-paging.aspx" will search for a control called "RadListView1", open its first page and the page size will be 5. The URL change means that SEO paging does not support partial page rendering. Even if you wrap the paged control and/or the pager in an UpatePanel, an AJAX POST will not be made when paging, the request will still be a GET.

In addition, you can specify the query page key for the grid that is used as part of the page query by setting the SEOPagingQueryPageKey property. This is useful when the data pager resides in several containers and its id becomes too long and not very readable. Using SEOPagingQueryPageKey property you get much more search engine optimized links to the other pages.

<telerik:RadListView runat="server" ID="RadListView1" DataSourceID="SqlDataSource1"
    DataKeyNames="CustomerID" AllowPaging="true" PageSize="7" ItemPlaceholderID="itemPlaceholder">
    <LayoutTemplate>
        <table style="width: 870px; background-color: #D9DFDF;">
            <tr>
                <th id="Th1" runat="server">
                    CustomerID
                </th>
                <th id="Th2" runat="server">
                    CompanyName
                </th>
                <th id="Th3" runat="server">
                    ContactName
                </th>
                <th id="Th4" runat="server">
                    ContactTitle
                </th>
            </tr>
            <tr runat="server" id="itemPlaceholder" />
        </table>
        <fieldset style="text-align: center; background-color: #D9DFDF; width:850px">
            <telerik:RadDataPager RenderMode="Lightweight" ID="RadDataPager1" runat="server" SEOPagingQueryPageKey="CurrentPageKey"
                PagedControlID="RadListView1" AllowSEOPaging="true" PageSize="7">
                <Fields>
                    <telerik:RadDataPagerButtonField FieldType="FirstPrev" />
                    <telerik:RadDataPagerButtonField FieldType="Numeric" />
                    <telerik:RadDataPagerButtonField FieldType="NextLast" />
                    <telerik:RadDataPagerTemplatePageField>
                        <PagerTemplate>
                            <div style="float: right">
                                <b>Items
                                    <asp:Label runat="server" ID="CurrentPageLabel" Text="<%# Container.Owner.StartRowIndex + 1 %>" />
                                    to
                                    <asp:Label runat="server" ID="TotalPagesLabel" Text="<%# Container.Owner.StartRowIndex + Container.Owner.PageSize %>" />
                                    of
                                    <asp:Label runat="server" ID="TotalItemsLabel" Text="<%# Container.Owner.TotalRowCount %>" />
                                    <br />
                                </b>
                            </div>
                        </PagerTemplate>
                    </telerik:RadDataPagerTemplatePageField>
                </Fields>
            </telerik:RadDataPager>
        </fieldset>
    </LayoutTemplate>
    <EmptyDataTemplate>
        <legend>Customers</legend>No records for customers are available at this time.
    </EmptyDataTemplate>
    <AlternatingItemTemplate>
        <tr id="Tr2" runat="server" bgcolor="#ccffff">
            <td>
                <asp:Label ID="CustomerID" runat="Server" Text='<%#Eval("CustomerID") %>' />
            </td>
            <td valign="top">
                <asp:Label ID="CompanyName" runat="Server" Text='<%#Eval("CompanyName") %>' />
            </td>
            <td valign="top">
                <asp:Label ID="ContactName" runat="Server" Text='<%#Eval("ContactName") %>' />
            </td>
            <td valign="top">
                <asp:Label ID="ContactTitle" runat="Server" Text='<%#Eval("ContactTitle") %>' />
            </td>
        </tr>
    </AlternatingItemTemplate>
    <ItemTemplate>
        <tr id="Tr2" runat="server" bgcolor="#99ccff">
            <td>
                <asp:Label ID="CustomerID" runat="Server" Text='<%#Eval("CustomerID") %>' />
            </td>
            <td valign="top">
                <asp:Label ID="CompanyName" runat="Server" Text='<%#Eval("CompanyName") %>' />
            </td>
            <td valign="top">
                <asp:Label ID="ContactName" runat="Server" Text='<%#Eval("ContactName") %>' />
            </td>
            <td valign="top">
                <asp:Label ID="ContactTitle" runat="Server" Text='<%#Eval("ContactTitle") %>' />
            </td>
        </tr>
    </ItemTemplate>
</telerik:RadListView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
    ProviderName="System.Data.SqlClient" 
    SelectCommand="SELECT [CustomerID], [CompanyName], [ContactName], [ContactTitle], [Address] FROM [Customers]" />

In case you need to set the paging settings programmatically, you have to do it on an early stage from the page life cycle.Hence, you can use the Page_PreInit or the Init event handler of the pager:

protected void RadDataPager1_Init(object sender, EventArgs e)
{
    RadDataPager1.PageSize = 3;
    RadDataPager1.AllowSEOPaging = true;
}
Protected Sub RadDataPager1_Init(sender As Object, e As EventArgs) Handles RadDataPager1.Init
    RadDataPager1.PageSize = 3
    RadDataPager1.AllowSEOPaging = True
End Sub

Page Size Support

Until Q2 2013, the RadDataPager SEO functionality has been saving the solely current page index in the URL.Although on a first glance this may seem enough, it is not. In a real life scenario the page size can be modified by theusers and this will render the SEO links invalid. This is why from Q2 2013, following the RadGrid behavior, we decided tointroduce support for page size in the SEO URL links. No breaking changes are made thus the existing applications that use this functionality will continue to behave as expected.

A typical SEO paging URL link looks like this:

tip

http://demo/WS1/DataPagerSEO.aspx?DataPager1=3_5

The syntax is DataPagerID=PageIndex_PageSize. When no page size value is provided, the control assumes that the page size is the default value of 10.This is to retain the compatibility with the previous versions of the control.