Protected Sub rgGrid_DetailTableDataBind(sender As Object, e As GridDetailTableDataBindEventArgs) Handles rgErrorGrid.DetailTableDataBind
        Select Case e.DetailTableView.Name
            Case "DetailTableName"
                Dim dataItem As GridDataItem = TryCast(e.DetailTableView.ParentItem, GridDataItem)
                Dim KeyVal As Integer
                Dim dt As DataTable = Nothing
 
                If Integer.TryParse(dataItem.GetDataKeyValue("ID").ToString(), KeyVal) Then
                    dt = GetDetailTable(KeyVal)
                End If
 
                If dt Is Nothing Then
                    ' What do I need to do here to either prevent the parent item from expanding, or show an empty grid...without throwing an exception?
                    e.DetailTableView.DataSource = Nothing
                    e.Canceled = True
                Else
                    e.DetailTableView.DataSource = dt
                End If
        End Select
    End Sub

<telerik:RadCodeBlock ID="RadCodeBlock2" runat="server">
    <script>
        if (Telerik && (Telerik.Web.Browser.chrome || Telerik.Web.Browser.edgeChromium) && Telerik.Web.UI.GridScrolling) {
            Telerik.Web.UI.GridScrolling.prototype.onGridFrozenScroll = function (args) {
                if (!this._frozenScrollCounter) {
                    this._frozenScrollCounter = 0;
                }

                this._frozenScrollCounter++;
                this._needToUpdateClientState = false;

                var gridControl = this;

                gridControl._currentElement = Telerik.Web.UI.Grid.GetCurrentElement(args);

                Telerik.Web.UI.Grid.frozenScrollHanlder = function (count) {
                    var operaVersion = 10.00;

                    if ($telerik.isOpera) {
                        operaVersion = navigator.userAgent.substring(navigator.userAgent.indexOf("Version/") + "Version".length + 1) * 1;
                    }
                    if (gridControl._frozenScrollCounter != count || gridControl._owner._isResize)
                        return;

                    if (!gridControl._lastScrollIndex) {
                        gridControl._lastScrollIndex = 0;
                    }
                    var masterTableView = gridControl._owner.get_masterTableView();
                    var masterTableViewHeader = gridControl._owner.get_masterTableViewHeader();

                    var currentElement = gridControl._currentElement;

                    if (gridControl._owner.ClientSettings.Scrolling.FrozenColumnsCount > masterTableViewHeader.get_columns().length) {
                        gridControl.isFrozenScroll = false;
                    }
                    var column, i;
                    if (gridControl.isFrozenScroll) {
                        var notFrozenColumns = gridControl._getNotFrozenColumns();

                        var scrollPercent = 0;
                        var notShownSpaceWidth = -1;

                        var currentElementWidthDiff = currentElement.scrollWidth - currentElement.offsetWidth;

                        if ((currentElementWidthDiff) != 0)
                            notShownSpaceWidth = currentElementWidthDiff;

                        scrollPercent = currentElement.scrollLeft / notShownSpaceWidth;

                        if (scrollPercent < 0)
                            scrollPercent = -1 * scrollPercent;

                        if (scrollPercent > 1)
                            scrollPercent = 1;

                        if (Telerik.Web.UI.Grid.IsRightToLeft(gridControl._owner.GridHeaderDiv) && ($telerik.isSafari || $telerik.isIE7))
                            scrollPercent = 1 - scrollPercent;

                        var gridColumns = masterTableView.get_columns();

                        var currentScrollPosition = currentElement.scrollLeft;
                        i = 0;
                        while (i < notFrozenColumns.length)//always show the last column
                        {
                            column = notFrozenColumns[i];

                            var prerviousForzenDisplayWidth = notFrozenColumns._getPreviousNotFrozenColumnWidth(column.Index);

                            if ((currentElementWidthDiff) < 0)
                                break;

                            var columnPercent = (column.Width + prerviousForzenDisplayWidth - 50) / notShownSpaceWidth; 

                            if (columnPercent <= scrollPercent && currentScrollPosition != 0) {
                                if (column.FrozenDisplay) {
                                    masterTableViewHeader._hideNotFrozenColumn(column.Index);
                                }
                            }
                            else {
                                if (!column.FrozenDisplay) {
                                    masterTableViewHeader._showNotFrozenColumn(column.Index);
                                }
                            }

                            i++;

                            if (i == (notFrozenColumns.length - 1)) {
                                var prevWidthBeforeLastHidden = 0;
                                var lastHiddenColumnIndex = 0;
                                var k = 0;
                                for (var j = 0; j < gridColumns.length - 1; j++) {
                                    if (typeof (gridColumns[j].FrozenDisplay) == 'boolean' && !gridColumns[j].FrozenDisplay) {
                                        prevWidthBeforeLastHidden += notFrozenColumns[k].Width;
                                        k++;
                                        lastHiddenColumnIndex = j;
                                    }
                                }
                                if ((prevWidthBeforeLastHidden - notShownSpaceWidth) < notFrozenColumns[notFrozenColumns.length - 1].Width + 25) {
                                    if (scrollPercent < 0.5) {
                                        var nextColumnToHide = notFrozenColumns[notFrozenColumns.length - 1];
                                        masterTableViewHeader._hideNotFrozenColumn(nextColumnToHide.Index);
                                    } else {
                                        var nextColumnToHide = notFrozenColumns[k];
                                        masterTableViewHeader._hideNotFrozenColumn(nextColumnToHide.Index);
                                    }
                                }
                            }
                        }

                        gridControl._afterColumnFreeze(masterTableView, masterTableViewHeader, scrollPercent);

                        if (scrollPercent > 0.9999 && $telerik.isFirefox) {
                            masterTableViewHeader.get_element().style.width = masterTableViewHeader.get_element().offsetWidth + "px";
                            masterTableViewHeader.get_element().style.tableLayout = "auto";
                            masterTableViewHeader.get_element().style.tableLayout = "fixed";

                            masterTableView.get_element().style.width = masterTableViewHeader.get_element().offsetWidth + "px";
                            masterTableView.get_element().style.tableLayout = "auto";

                            masterTableViewHeader.get_element().style.tableLayout = "";
                            setTimeout(
                                function () {
                                    if ($telerik.isFirefox && Sys.Browser.version >= 4)
                                        masterTableView.get_element().style.tableLayout = "fixed";
                                    masterTableViewHeader.get_element().style.tableLayout = "auto";
                                    masterTableViewHeader.get_element().style.tableLayout = "fixed";
                                },
                                100);
                        }

                        if (gridControl._owner.get_masterTableViewFooter()) {

                            gridControl._owner.get_masterTableViewFooter().get_element().style.width = masterTableViewHeader.get_element().offsetWidth + "px";
                            gridControl._owner.get_masterTableViewFooter().get_element().style.tableLayout = "auto";
                            gridControl._owner.get_masterTableViewFooter().get_element().style.tableLayout = "fixed";
                        }

                    }
                    else {
                        gridControl._owner.GridDataDiv.scrollLeft = currentElement.scrollLeft;
                    }

                    /////////////////////////////////////
                    gridControl._frozenScrollCounter = 0;
                    gridControl._needToUpdateClientState = true;
                    //gridControl._owner.updateClientState();
                    setTimeout(Telerik.Web.UI.Grid._clientStateUpdater, 500);

                    if (gridControl._owner.get_events().getHandler("scroll")) {
                        gridControl._owner.raise_scroll(new Telerik.Web.UI.GridScrollEventArgs(gridControl._currentElement));
                    }
                };

                Telerik.Web.UI.Grid._clientStateUpdater = function () {
                    if (gridControl._needToUpdateClientState) {
                        gridControl._needToUpdateClientState = false;
                        gridControl._owner.updateClientState();
                    }
                };
                clearTimeout(window.frozenScrollTimeout);
                window.frozenScrollTimeout = setTimeout("Telerik.Web.UI.Grid.frozenScrollHanlder(" + this._frozenScrollCounter + ")", 30);

            }

        }
    </script>
</telerik:RadCodeBlock>