RadGrid - Detail Table Bind, Client-side event?

[Tim]

Is there any client-side event that will fire after the detail table is expanded or collapsed? 

I'm trying to solve this problem: I have a CommandItemTemplate with a LinkButton which should only be enabled when the number of selected rows > 0.  The JS works fine, when linked to ClientEvents-OnRow{Selected|Deselected}.  The problem comes when the row expands, and the ItemCommand is fired in conjunction with the BindDetailTable.  After this event, the LinkButton is never again seen.

I have tried ItemCommand code-behind to set the Style["visibility"] = "none" (or "inline", if SelectedItems.Count>0), and I have tried a plethora of the ClientEvents-On* but nothing seems to work.

Here is the JS function which works as long as the detail table is not expanded:

function ConditionallyEnableClearButton(sender, eventArgs) {
    var masterTableView = sender.get_masterTableView();
    var selectedItems = masterTableView.get_selectedItems();
    var visibility = selectedItems.length > 0 ? "inline" : "none";

    var button = document.getElementById('<%= AlertGrid.MasterTableView.GetItems(GridItemType.CommandItem)[0].FindControl("ClearButton").ClientID %>');
    if (button) {
        button.style.display = visibility;
    }
}

And here is the ItemCommand code-behind:

LinkButton clearButton =
                grid.MasterTableView.GetItems(GridItemType.CommandItem)[0].FindControl(CLEAR_BUTTON) as LinkButton;
var oldValue = clearAlertsButton.Style["display"];
clearAlertsButton.Style["display"] = grid.SelectedItems.Count > 0 ? "inline" : "none";

I think a pure JS solution would work, if I could hook up the JS function to the end of the expand or collapse event, client-side.

Thanks,
Tim

[Tim]

Having written a macro to generate ALL the client side events, I have determined that ClientEvents-OnGridCreated will do the trick - fired at the very end of the row expansion.

Anyone think this is wrong?

Tim

[Sebastian]

Hi Tim,

Interceoting the OnGridCreated client event might be one possible solution for your situation.

In addition, note that RadGrid exposes OnHierarchyExpanding/OnHierarchyExpanded as well as OnHierarchyCollapsing/OnHierarchyCollapsed client-side events which are meaningful with HierarchyLodeMode set to Client:

http://www.telerik.com/help/aspnet-ajax/clientevents_members.html

They are demonstrates in this online demo of the product:

http://demos.telerik.com/ASPNET/Prometheus/Grid/Examples/Hierarchy/HierarchyLoadModeClient/DefaultCS.aspx

Best regards,
Stephen
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.

[Tim]

OnHierarchyExpanding/OnHierarchyExpanded as well as OnHierarchyCollapsing/OnHierarchyCollapsed client-side events which are meaningful with HierarchyLodeMode set to Client:

Thanks, but I'm not using HiearchyLoadMode so that does not help me.  Based on the demo, it was one of the first things I did try.

Tim