I need "index" from object which "SelectedRow" returns, but there is no property called index, it is quite different object than it return in the Grid API and Events" example. I used exactly the same .js libraries which are used in that example, but still without any success. Please help

The second picture is inside that [Object, HTMLDivElement]

Here is my code (important parts)

@Scripts.Render("~/bundles/jquery")
@Scripts.Render("~/bundles/jqueryui")
@Scripts.Render("~/bundles/modernizrForIG") 

@Scripts.Render("~/Content/Scripts/jquery.event.drag.js")

@Scripts.Render("~/Content/Scripts/knockout-2.3.0.debug.js")
<!-- Infragistic -->
@Styles.Render("~/Content/css/IG/themes/metro/infragistics.theme.css")
@Styles.Render("~/Content/css/IG/structure/infragistics.css")
@Scripts.Render("~/Content/Scripts/IG/modules/infragistics.util.js")
@Scripts.Render("~/Content/Scripts/IG/infragistics.core.js")
@Scripts.Render("~/Content/Scripts/IG/infragistics.lob.js")
@Scripts.Render("~/Content/Scripts/IG/infragistics.loader.js")
@Scripts.Render("~/Content/Scripts/IG/modules/infragistics.ui.editors.js")
@Scripts.Render("~/Content/Scripts/IG/modules/i18n/regional/infragistics.ui.regional-cs.js")
@Scripts.Render("~/Content/Scripts/IG/extensions/infragistics.ui.editors.knockout-extensions.js")
@Scripts.Render("~/Content/Scripts/IG/extensions/infragistics.datasource.knockoutjs.js")

@section featured
{

<fieldset>
<legend>xxx</legend>
<button id="igButtDetail" class="Button ButtonGreen IconInfo">Detail</button>
<table id="orderIncomingOverview">
<tr>
<th>xx</th>
<td>
<label for="startDate">xx</label></td>
<td>
<input id="startDate" data-bind="igDateEditor: { value: startDate, updateMode: 'immediate' }" />
</td>
<td>
<label for="endDate">xx</label></td>
<td>
<input id="endDate" data-bind="igDateEditor: {value: endDate}" />
</td>
<td>
<select data-bind="options: stateList, value: orderIncomingState, optionsValue: 'idState', optionsText: 'name'"></select>
</td>
<td>
<button class="Button ButtonGreen IconSearch" onclick="LoadGrid()">Hledat</button>
</td>
</tr>
</table>
<div id="orderIncomingOverviewGrid"></div>
</fieldset>

}

@section scripts
{
<script>
var viewModel = {
startDate: ko.observable(),
endDate: ko.observable(),
stateList: ko.observable(),
orderIncomingState: ko.observable()
};

$.ig.loader({
scriptPath: '/Content/Scripts/IG/',
cssPath: '/Content/css/IG/',
resources: "igEditors, igGrid.Selection",
regional: 'cs',
ready: function () {
viewModel.stateList(GetStateList());
GetDefaultValues();
}
});
$(function () {
$("#startDate").igDatePicker({});

$("#endDate").igDatePicker({});

});

function GetDefaultValues() {
jQuery.support.cors = true;
$.ajax({
url: 'apiurl',
type: 'GET',
dataType: 'json',
success: function (data) {
viewModel.startDate(GetDateFromDatetime(data.startDate));
viewModel.endDate(GetDateFromDatetime(data.endDate));
viewModel.orderIncomingState(data.state);
ko.applyBindings(viewModel);
},
error: function (jqXHR, textStatus, errorThrown) {
HandleError(jqXHR, textStatus, errorThrown);
}
});
}

var gridData;
var columns = [columns def, not important];
var features = [
{
name: "Selection",
mode: "row",
multipleSelection: true
},
{
name: "Filtering",
mode: "simple",
columnSettings:
[
{ columnKey: "state", allowFiltering: false }
]
},
{
name: "Sorting",
type: "local"
}
];

function LoadGrid() {
ApplicationBusy('Načítání dat');
$.ajax({
url: 'apiurl',
type: 'Post',
data: JSON.stringify({ startDate: viewModel.startDate(), endDate: viewModel.endDate(), state: viewModel.orderIncomingState() }),
contentType: "application/json",
dataType: 'json',
success: function (data) {
gridData = data;
$("#orderIncomingOverviewGrid").igGrid({
dataSource: gridData,
responseDataKey: "results",
regional: "cs",
primaryKey: "idOrderIncoming",
columns: columns,
height: 600,
width: 1200,
features: features,
renderCheckboxes: true,
autoGenerateColumns: false
});
ApplicationFine();
},
error: function (jqXHR, textStatus, errorThrown) {
ApplicationFine();
HandleError(jqXHR, textStatus, errorThrown);
}
});
};

$("#igButtDetail").on({
click: function (e) {

var row = $("#orderIncomingOverviewGrid").igGridSelection("selectedRow");

}
});

}
</script>
}