Grid Inside Nested View and it's Paging

[Sergey Sugak]

Hello, guys.
I have problem similar to described here http://www.telerik.com/community/forums/aspnet-ajax/grid/radgrid-inside-nestedviewtemplate-of-another-dynamic-radgrid.aspx
But somehow doing things the same way I don't get the same result.
Here is what my logic is:
I have SelectableItems grid.
In the nested view I have ItemLots grid where I would like to show some information to user.
I have following grdSelectableItems_ItemCommand event hadler

    protected void grdSelectableItems_ItemCommand(object source, GridCommandEventArgs e)
    {
        GridDataItem Row = e.Item as GridDataItem;
        if (Row != null)
        {
            if (e.CommandName == RadGrid.ExpandCollapseCommandName)
            {
                if (!Row.Expanded)
                    ExpandNestedView (Row);
            }
        }
    }

ExpandNestedView is the proecedure where I have the follwing peace of code
...
        GridNestedViewItem NestedView = ParentGridRow.ChildItem;
...
                RadGrid grdItemLots = (RadGrid)NestedView.FindControl("grdItemLots");
                if (grdItemLots != null)
                {
                    grdItemLots.NeedDataSource += new GridNeedDataSourceEventHandler(grdItemLots_NeedDataSource);
                    grdItemLots.Rebind();
                }
...

grdItemLots_NeedDataSource procedure fills the datasource and assigns it to grdItemLots.DataSource.
grdItemLots has AllowPaging="True"

And also  I wrote this little thing hoping that this will update grid's content after my actions with it.
    protected void grdItemLots_ItemCreated(object sender, GridItemEventArgs e)
    {
        if (e.Item is GridDataItem)
        {
            GridNestedViewItem NestedView = (GridNestedViewItem)((sender as RadGrid).NamingContainer);
            if (NestedView != null)
            {
                RadGrid grdItemLots = (RadGrid)NestedView.FindControl("grdItemLots");
                if (grdItemLots != null)
                    RadAjaxManager1.AjaxSettings.AddAjaxSetting(grdItemLots, grdItemLots);
            }
        }
    }

So the show begins when I try to go to the page different from #1 after expanding parent row. grdItemLots dissapears. BUT ! When I collapse and then expand the parent row I can see the data from the page 2.
What did I do wrong?

With respect, Sergey.
P.S. I'm using trial version 2010.1.519.40

[Martin]

Hello Sergey Sugak,

I have created a small sample project that demonstrates how to achieve the desired functionality. Please give it a try and let me know how it goes on your side.

Regards,
Martin
the Telerik team

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[Batoha]

Hello, Martin.
I apprciate you wasted your time trying to help me.
I didn't install all .NET assemblies of RadControls (only 4.0) and unfortunately I have no much time to reconfigure your code at the moment. Could you tell me what could be the reason of the behaviour I explained. I don' t create any grid programmatically. Every event is handled. It seems that everything should work perfectly. But it doesn't.

Thanks in advance.
With respect, Sergey.

[Martin]

Hello Sergey,

The main differences I have implemented in my sample project are as follows:

• the inner grid's NeedDataSource event is wired on the ItemCreated event of the parent grid.
• the inner grid is bound on the ItemCommand event of the parent one.
• the inner grid is added to the RadAjaxManager's settings on the Page.PreRender event.

I have also attached a modified version of the project that should be runnable with .NET 4.0 assemblies. Just open it as a website, create a local Bin folder and place the "Telerik.Web.UI.dll" and "Telerik.Web.Design.dll" assemblies in it. Then you should be able to run the project without any problems.

Regards,
Martin
the Telerik team

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[Wired_Nerve]

I am dealing with a legacy page written in VB.NET and was wondering if you have this example in VB?


Warren

[Martin]

Hello Warren,

I have attached a modified version of the project written both in C# and VB. Please also note that you can use the free Telerik code converter.

I hope this helps

Regards,
Martin
the Telerik team