[Solved] Paging problem with self-reference hierarchical grid

[leonardo]

I'm using RadGrid 2008.1.515.35 with an ArrayList as datasource and trying to make a hierarchical grid working with paging and virtual scrolling.
I've tried so hard by i couldn't make. First of all the paging is not presented. I'm sure that there is enough data to make pager visible but it is not.
This behaviour is strange because when i'm using 2008.1.414.35 version, the paging is shown. Below is the source code. Please what i'm doing wrong ?

Thanks in advance.

Best regards.

protected override void OnInit(EventArgs e){
    RadGrid RadGrid1 = new RadGrid();
    RadGrid1.NeedDataSource += new GridNeedDataSourceEventHandler(Grid_NeedDataSource);
    RadGrid1.DetailTableDataBind += new GridDetailTableDataBindEventHandler(Grid_DetailTableDataBind);
    RadGrid1.MasterTableView.DataKeyNames = new string[] { "Item_ID", "Parent_ID" };
    RadGrid1.MasterTableView.ClientDataKeyNames = new string[] { "Item_ID", "Parent_ID" };
    RadGrid1.MasterTableView.HierarchyLoadMode = GridChildLoadMode.Client;
    RadGrid1.MasterTableView.SelfHierarchySettings.KeyName = "Item_ID";
    RadGrid1.MasterTableView.SelfHierarchySettings.ParentKeyName = "Parent_ID";
    RadGrid1.MasterTableView.GroupLoadMode = GridGroupLoadMode.Client;
    RadGrid1.MasterTableView.TableLayout = GridTableLayout.Fixed;
    RadGrid1.MasterTableView.PageSize = 10;
    RadGrid1.MasterTableView.PagerStyle.Mode = GridPagerMode.NextPrevNumericAndAdvanced;
    RadGrid1.MasterTableView.PagerStyle.Position = GridPagerPosition.Bottom;
    RadGrid1.AllowPaging = true;
    RadGrid1.VirtualItemCount = 1000;
    RadGrid1.AllowCustomPaging = true;
    RadGrid1.AllowSorting = true;
    RadGrid1.AutoGenerateColumns = false;
    RadGrid1.EnableLinqExpressions = true;
    RadGrid1.Skin = "Office2007";
    RadGrid1.GroupingEnabled = true;
    RadGrid1.AllowMultiRowSelection = true;
    RadGrid1.ShowGroupPanel = true;
    RadGrid1.ClientSettings.AllowDragToGroup = true;
    RadGrid1.ClientSettings.Selecting.AllowRowSelect = true;
    RadGrid1.ClientSettings.Scrolling.AllowScroll = true;
    RadGrid1.ClientSettings.Scrolling.UseStaticHeaders = true;
    RadGrid1.ClientSettings.Scrolling.EnableVirtualScrollPaging = true;
    RadGrid1.ClientSettings.Scrolling.SaveScrollPosition = true;
    RadGrid1.ClientSettings.AllowColumnsReorder = true;
    RadGrid1.ClientSettings.AllowExpandCollapse = true;
    RadGrid1.ClientSettings.ReorderColumnsOnClient = true;
    RadGrid1.ClientSettings.Resizing.AllowColumnResize = true;
    RadGrid1.ClientSettings.Resizing.ResizeGridOnColumnResize = true;
    RadGrid1.ClientSettings.ClientEvents.OnRowDblClick = "RowDblClick";
    RadGrid1.ClientSettings.ClientEvents.OnRowClick = "OnRowClick";
    RadGrid1.ClientSettings.ClientEvents.OnRowDeselected = "OnRowDeselected";
    RadGrid1.ClientSettings.ClientEvents.OnRowSelected = "OnRowSelected";
    RadGrid1.ClientSettings.ClientEvents.OnRowContextMenu = "RowContextMenu";
    RadGrid1.MasterTableView.FilterExpression = "Parent_ID = 0";

    //here a i create the grid columns

    this.PlaceHolder.Controls.Add(RadGrid1);
}

protected void Grid_NeedDataSource(object source, Telerik.Web.UI.GridNeedDataSourceEventArgs e)
{
    List<DItemVersion> items = Session["GenericItemList_Items"] as List<DItemVersion>;
    if (items == null)
    {
        Grid.DataSource = new ArrayList();
    }
    else
    {
        int curIndex = Grid.CurrentPageIndex;
        int maximum = Grid.MasterTableView.PageSize;

        if ((curIndex + maximum) > items.Count - 1)
        {
            maximum = items.Count - curIndex;
        }

        Grid.DataSource = new ArrayList(items.GetRange(curIndex, maximum));
    }
}

protected void Grid_DetailTableDataBind(object source, GridDetailTableDataBindEventArgs e)
{
    GridTableView parentView = e.DetailTableView.ParentItem.OwnerTableView;
    Telerik.Web.UI.DataKey parentKey = parentView.DataKeyValues[e.DetailTableView.ParentItem.ItemIndex];

    e.DetailTableView.FilterExpression = "Parent_ID = " + parentKey["Item_ID"];
}

[Shinu]

Hi,

Try adding the following line of code and see whether the Pager is appearing or not.

CS:

 RadGrid1.PagerStyle.AlwaysVisible = true;

Thanks
Shinu

[leonardo]

Hi Shinu,

This works. The pager is presented but it does not represent the data assigned to DataSource. It presents only one page with the number of items that i assigned to PagerSize.

Thanks.

[Konstantin Petkov]

Hello leonardo,

I'm sending you the latest internal build, where a similar issue is fixed. I'm not absolutely sure you get the problem due to the same issue, but it's worth trying this build. Please, give it a go and let us know if it helps.

Sincerely yours,
Konstantin Petkov
the Telerik team

Instantly find answers to your questions at the new Telerik Support Center

[leonardo]

Yes it works. Thanks a lot.