Hi, I am migrating the following webform example to mvc

http://examples2.ext.net/#/GridPanel...etails_Window/

This is my view code

@{
    Layout = null;
    @Html.X().ResourceManager()
}


@{
    <script>
        var CompanyX = {
            _index: 0,

            getIndex: function () {
                return this._index;
            },

            setIndex: function (index) {
                if (index > -1 && index < App.GridPanel1.getStore().getCount()) {
                    this._index = index;
                }
            },

            getRecord: function () {
                var rec = App.GridPanel1.getStore().getAt(this.getIndex());  // Get the Record

                if (rec != null) {
                    return rec;
                }
            },

            edit: function (index) {
                this.setIndex(index);
                this.open();
            },

            next: function () {
                this.edit(this.getIndex() + 1);
            },

            previous: function () {
                this.edit(this.getIndex() - 1);
            },

            refresh: function () {
                App.GridPanel1.getView().refresh();
            }
        };
    </script>
}

@(Html.X().GridPanel()
    .ID("GridPanel1")
    .Title("Employees")
    .Height(200)
    .Store(Html.X().Store()
        .PageSize(5)
        .Proxy(proxy =>
                proxy.Add(Html.X().AjaxProxy()
                            .Url("Employees")
                            .ActionMethods(methods =>
                                methods.Read = HttpMethod.POST
                            )
                            .Reader(Html.X().JsonReader()
                                .TotalProperty("total")
                                .Root("data")
                            )
                            .Listeners(l => l.Exception.Handler = "Ext.MessageBox.alert('Load failed', response.statusText);")
                )
        )
        .Model(Html.X().Model()
            .IDProperty("EmployeeID")
            .Fields(
                new ModelField("EmployeeID"),
                new ModelField("FirstName"),
                new ModelField("LastName"),
                new ModelField("Title"),
                new ModelField("TitleOfCourtesy"),
                new ModelField("BirthDate", ModelFieldType.Date),
                new ModelField("HireDate", ModelFieldType.Date),
                new ModelField("City"),
                new ModelField("Address"),
                new ModelField("Region"),
                new ModelField("PostalCode"),
                new ModelField("Country"),
                new ModelField("Homephone"),
                new ModelField("Extension"),
                new ModelField("Notes"),
                new ModelField("Photopath"),
                new ModelField("ReportsTo")
            )
        )
        .Sorters(Html.X().DataSorter()
            .Property("LastName")
            .Direction(Ext.Net.SortDirection.ASC)
        )
    )
    .ColumnModel(
        Html.X().Column().Text("Full Name").DataIndex("LastName").Flex(1).Renderer(new Renderer() { Fn = "return '<b>' + record.data['LastName'] + '</b>,' + record.data['FirstName']" }),
        Html.X().Column().Text("Title").DataIndex("Title").Width(150),
        Html.X().DateColumn().Text("Birth Date").DataIndex("BirthDate").Format("yyyy-MM-dd"),
        Html.X().Column().Text("City").DataIndex("City").Width(100),
        Html.X().Column().Text("Address").DataIndex("Address").Width(250),
        Html.X().CommandColumn()
            .Commands(c =>
            {
                c.Add(Html.X().GridCommand().CommandName("Edit").Icon(Icon.NoteEdit));
            })
            .ToolTip("Edit")
            .Listeners(listener =>
            {
                listener.Command.Handler = "CompanyX.edit(recordIndex);";
            })
    )
    .BottomBar(
        Html.X().PagingToolbar()
            .DisplayInfo(true)
            .DisplayMsg("Displaying employees {0} - {1} of {2}")
            .EmptyMsg("No employees to display")
    )
)
But I don't know how to return json data from controller

        public ActionResult Index()
        {
            List<Employee> result = Employee.GetAll();
            return this.Store(result);
         }
Could you help me or give me some example? Thanks