I'm writing  an ASP.NET MVC5 application using Ignite.  I have 3 cascading combo boxes that I need to populate via Ajax calls.  I'll show the first 2 as the third follows the same pattern and has the same issue as the third.  My issue is that after post, the cascaded combo's lose their values.  (The "Parent" works fine)

LMK if you need more details

@Html.LabelFor(model => model.GroupId, "Group")
                    <div>
                        @(Html.Infragistics()
                            .ComboFor(model => model.GroupId)
                            .ID("cmbGroups")
                            .Width("200px")
                            .TextKey("GroupName")
                            .ValueKey("GroupId")
                            .DataSourceUrl(Url.Action("group-combo-data"))
                            .EnableClearButton(false)
                            .DataBind()
                            .Render())
                    </div>

@Html.LabelFor(model => model.ProjectId, "Project")
                    <div>
                        @(Html.Infragistics()
                            .ComboFor(model => model.ProjectId)
                            .ID("cmbProjects")
                            .Width("200px")
                            .TextKey("ProjectName")
                            .ValueKey("ProjectId")
                            .DataBind()
                            .Render())
                    </div>

JavaScript to populate

<script type="text/javascript">
        $(document).delegate("#cmbGroups", "igcomboselectionchanged", function (evt, ui) {
 
            var cmbGroups = ui.owner;
            var groupId = cmbGroups.value();
            var postData = { "groupId": groupId };
 
            $.getJSON('@Url.Action("GetProjectsByGroupId", "Report")', postData, function (returnData) {
                $("#cmbProjects").igCombo({
                    ID: "cmbProjects",
                    Name: "cmbProjects",
                    dataSourceType: "json",
                    dataSource: returnData,
                    textKey: "ProjectName",
                    valueKey: "ProjectId",
                    enableClearButton: false
                });                
            });
        });