[Solved] Ajaxified RadGrid SortExpression Out of Range on Repeated Sorts

[Phil DeVeau]

I'm using an ajaxified RadGrid to display a long List<T> in a multi-tier environment.  I've implemented a custom paging solution and I'm passing the SortExpressions[0] information to my next tier.  This works fine for the first few sorts then I start to get an argument out range expression.

<telerik:RadGrid ID="AccountListRadGrid" runat="server"
    OnItemCreated="AccountListRadGrid_ItemCreated"
    OnItemCommand="AccountListRadGrid_ItemCommand"
    OnItemDataBound="AccountListRadGrid_NodeDataBound"
    OnNeedDataSource="AccountListRadGrid_NeedDataSource"
    OnDeleteCommand="AccountListRadGrid_DeleteButton_Click"
    SkinID="ObjectList"
    GridLines="None"
    AutoGenerateColumns="False"
    AllowPaging="False"
    AllowMultiRowSelection="true"
    AllowSorting="True">
    <MasterTableView
            CommandItemDisplay="Bottom"
            AllowPaging="false"
            DataKeyNames="ObjectId">
        <NoRecordsTemplate>
            <div>There are no accounts to display</div>
        </NoRecordsTemplate>
        <CommandItemTemplate />
        <RowIndicatorColumn>
            <HeaderStyle Width="20px"></HeaderStyle>
        </RowIndicatorColumn>
        <ExpandCollapseColumn>
            <HeaderStyle Width="20px"></HeaderStyle>
        </ExpandCollapseColumn>
        <Columns>
            <telerik:GridTemplateColumn SortExpression="AccountName" HeaderText="&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;Account Name" UniqueName="AccountNameColumn">
                <ItemTemplate>
                    &#160;
                    <asp:Image ID="TypeImg" ImageUrl="~/Images/50_ico.gif" runat="server" ImageAlign="AbsMiddle" />
                    &#160;
                    <asp:Hyperlink runat="server" ID="NameLink" />
                </ItemTemplate>
                <HeaderStyle Width="30%" />
            </telerik:GridTemplateColumn>
            <telerik:GridBoundColumn DataField="FriendlyName" SortExpression="FriendlyName" HeaderText="Friendly Name" UniqueName="FriendlyNameColumn">
                <HeaderStyle Width="30%" />
            </telerik:GridBoundColumn>
            <telerik:GridBoundColumn DataField="DateLastModified" SortExpression="DateLastModified" HeaderText="Date&#160;of&#160;Last&#160;Upload" UniqueName="LastModifiedColumn">
                <HeaderStyle Wrap="false" />
                <ItemStyle Wrap="false" />
            </telerik:GridBoundColumn>
            <telerik:GridNumericColumn DataField="ItemCount" HeaderText="Items" DataType="System.Int32" UniqueName="ItemCountColumn">
                <HeaderStyle Wrap="false" Width="55px" HorizontalAlign="Center" />
                <ItemStyle Wrap="false" HorizontalAlign="Center" />
            </telerik:GridNumericColumn>
            <telerik:GridButtonColumn ImageUrl="~/images/delete.gif" HeaderText="All:" CommandName="Delete" ConfirmText="Deactivate this Account?" ConfirmTitle="Deactivate Account" ConfirmDialogType="RadWindow" UniqueName="DeleteAccountColumn" ButtonType="ImageButton">
                <HeaderStyle Wrap="false" HorizontalAlign="Right" Width="35px" />
                <ItemStyle HorizontalAlign="Center" />
            </telerik:GridButtonColumn>
            <telerik:GridClientSelectColumn HeaderStyle-Width="20px" UniqueName="RevokeCheck"></telerik:GridClientSelectColumn>
            <telerik:GridBoundColumn DataField="ObjectID" Display="False" UniqueName="IdColumn"></telerik:GridBoundColumn>
        </Columns>
        <SortExpressions>
            <telerik:GridSortExpression FieldName="AccountName" SortOrder="Ascending" />
        </SortExpressions>
        <CommandItemTemplate>
            <div class="MoreRecordsContainer">
                <asp:HyperLink ID="MoreRecords" runat="server" Text="More..." CssClass="MoreRecords" />
            </div>
        </CommandItemTemplate>
    </MasterTableView>
    <ClientSettings Selecting-AllowRowSelect="true"></ClientSettings>
</telerik:RadGrid>

 public LPDataPageRequest DataPageRequest
    {
        get
        {
            RadGrid grid = AccountListRadGrid;
            int currentPage = 0;
            int pageSize = 15;
            string property = string.Empty;
            LPSortOrder sortOrder = LPSortOrder.Ascending;

            if (grid.MasterTableView.SortExpressions != null && grid.MasterTableView.SortExpressions.Count > 0)
            {
                property = grid.MasterTableView.SortExpressions[0].FieldName;
                sortOrder = grid.MasterTableView.SortExpressions[0].SortOrder == GridSortOrder.Ascending ? LPSortOrder.Ascending : LPSortOrder.Descending;
            }

            return new LPDataPageRequest(currentPage, pageSize, property, sortOrder);
        }
    }

[Yavor]

Hi Phil,

I reviewed the code, and it looks correct.
However, based on this information, it is hard to determine what is causing the unwanted behavior.
If the issue persists, you can open a formal support ticket, and send us the problematic code, in the form of a small working project. We will review it locally, and advise you further.

Greetings,
Yavor
the Telerik team

Instantly find answers to your questions on the new Telerik Support Portal.
Check out the tips for optimizing your support resource searches.

[Phil DeVeau]

The problem appears to be that I'm setting an item as sorted to start, so through continued sorts the pattern of sortexpressions sorting the same field, starting from ascending, is field asc, field desc, none.  When the sortorder is non sortexpressions[0] is null.  Is there a declarative way to disallow the sortorder none case, or does that have to be handled in code?

[Yavor]

Hello Phil,

You can disallow natural sort (sort = none), by setting AllowNaturalSort="false".
Let me know how this works in your case.

Greetings,
Yavor
the Telerik team

Instantly find answers to your questions on the new Telerik Support Portal.
Check out the tips for optimizing your support resource searches.

[Phil DeVeau]

Thanks for the tip, this worked in my sample project, so it should work in my actual project.  I've got a skin file set up, I wonder if I could integrate that into my radgrid skin, this way I won't have to hit each radgrid on each user control.

[Yavor]

Hi Phil,

If you are looking to alter a specific skin for the grid, the following article contains additional information. I hope it gets you started properly.

Greetings,
Yavor
the Telerik team

Instantly find answers to your questions on the new Telerik Support Portal.
Check out the tips for optimizing your support resource searches.