MasterTableView.get_selectedItems() returns empty

[Ed]

I have a rad grid with check boxes.
I have a rad combo box that controls what data is returned to the grid.
I have a button that processes the checked items.
The first time the data is loaded, selected items are present and processed.
If I change the combo box selection, the data loaded is correct but the selected items always returns an empty list.

The Grid

<MasterTableView CommandItemDisplay="Top" AllowCustomPaging="True" AllowPaging="True"
                        TableLayout="Fixed" ClientDataKeyNames="AssetId,MacId" PagerStyle-PageSizes="25;50;75;100">
                        <CommandItemSettings ShowAddNewRecordButton="False"></CommandItemSettings>
                        <RowIndicatorColumn FilterControlAltText="Filter RowIndicator column" Visible="True">
                        </RowIndicatorColumn>
                        <ExpandCollapseColumn FilterControlAltText="Filter ExpandColumn column" Visible="True">
                        </ExpandCollapseColumn>
                        <Columns>
                            <telerik:GridClientSelectColumn HeaderStyle-Width="3em" UniqueName="ClientSelectColumn">
                                <HeaderStyle Width="3em" />
                            </telerik:GridClientSelectColumn>
                            <telerik:GridBoundColumn DataField="MacId" HeaderText="Mac Id" UniqueName="MacId">
                                <HeaderStyle Width="75px" />
                            </telerik:GridBoundColumn>
                            <telerik:GridBoundColumn DataField="PoleId" HeaderText="Pole" SortExpression="PoleId"
                                UniqueName="PoleId" HeaderStyle-Wrap="false" HeaderStyle-Width="75px">
                            </telerik:GridBoundColumn>

The Data Source

<asp:LinqDataSource ID="StatusDataSource" runat="server" ContextTypeName="EnterpriseWeb.DataContracts.Diagnostics.DiagnosticsDataContext"
    EntityTypeName="" OrderBy="Weight" Select="new (StatusId, Description, ShowByDefault)"
    TableName="StatusCodeRows" OnSelected="StatusDataSource_Selected">
</asp:LinqDataSource>

The JavaScript

var Items = MasterTableView.get_selectedItems();

if (Items.length > 0)
{
    var SelectedAssetIds = [];

    $.each(Items, function (i, Item) {
        SelectedAssetIds.push(Item.getDataKeyValue("AssetId"));
    });

    var List = SelectedAssetIds.join("|");
    OpenRadWindow(BaseUrl + "Html/WorkOrders/WorkOrdersCreatepage.aspx?InstallationId=" + InstallationId + "&Assets=" + List, "WorkOrderCreateWindow");
}

[Viktor Tachev]

Hi Ed,

I created a sample project form the provided description, however I was unable to replicate the issue. You would find the project as an attachment. There is a RadComboBox and on its OnSelectedIndexChanged event the RadGrid is rebound. The number of selected items is returned when the button on the page is clicked.

Give this project a try and let me know if it is working for you. I would appreciate it if you could modify the sample in a way that the problematic behavior is replicated and send it back in a support ticket. This would enable us to further investigate the issue and provide appropriate solution.

Regards,
Viktor Tachev
Telerik

[Ed]

It works, now.

The change I made was in the pageLoad method, wherein I was assigning a variable to the grid's MasterTableView.

MasterTableView = $find("<%= HistoryGrid.MasterTableView.ClientID %>");

Changed to

MasterTableView = $find("<%= HistoryGrid.ClientID %>").get_masterTableView();