Insert in hierarchical grid

[Christian]

Hi

Is inserting supported for the master in a hierarchical grid?

when I add the insert button in the toolbar and click it, I get a null pointer exception

Html.Telerik().Grid(Model)
       .Name("GroupGrid")
       .DataKeys(k => k.Add(g => g.GroupID))
       .Columns(columns =>
       {
           columns.Bound(g => g.GroupID).ReadOnly().Width(100);
           columns.Bound(g => g.GroupName).Width(100);
       })
       .ToolBar(tb => tb.Insert())
       .DetailView(groupDetailView => groupDetailView.Template(g =>
       {
           %>
               <%=
               Html.Telerik().Grid(g.Roles)
                   .Name("GroupGrid_RoleDetails_" + g.GroupID)
                   .Columns(columns =>
                                {
                                    columns.Bound(r => r.RoleID).Width(100);
                                    columns.Bound(r => r.RoleName).Width(200);
                                })
                   .Pageable()
                   .Sortable()
               %>
           <%
       }))
       .DataBinding(db => db.Server().Insert("AddGroup", "Group"))
       .Pageable(pager => pager.PageSize(20))
       .Sortable()
       .Selectable()
       .Filterable()
       .Render();

It displays the grid for Groups including the child grid for Roles, but when clicking on "Add new record" I get

[NullReferenceException: Object reference not set to an instance of an object.]
   Telerik.Web.Mvc.UI.Html.GridEditRowHtmlBuilder`1.CreateTable() +541
   Telerik.Web.Mvc.UI.Html.GridEditRowHtmlBuilder`1.BuildCore() +130
   Telerik.Web.Mvc.UI.HtmlBuilderBase.Build() +72
   Telerik.Web.Mvc.UI.GridHtmlBuilder`1.CreateRow(GridRow`1 row) +119
   Telerik.Web.Mvc.UI.GridHtmlBuilder`1.AppendRows(IHtmlNode body, IEnumerable`1 dataSource) +362
   Telerik.Web.Mvc.UI.GridHtmlBuilder`1.CreateBody() +572
   Telerik.Web.Mvc.UI.GridHtmlBuilder`1.BuildCore() +594
   Telerik.Web.Mvc.UI.HtmlBuilderBase.Build() +72
   Telerik.Web.Mvc.UI.Grid`1.WriteHtml(HtmlTextWriter writer) +1135
   Telerik.Web.Mvc.UI.ViewComponentBase.Render() +148
   Telerik.Web.Mvc.UI.ViewComponentBuilderBase`2.Render() +55
   ASP.views_group_editgroups_aspx.__RenderContent2(HtmlTextWriter __w, Control parameterContainer) in ...\Views\Group\EditGroups.aspx:13
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +109
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +8
   System.Web.UI.Control.Render(HtmlTextWriter writer) +10
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +100
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
   ASP.views_shared_site_master.__Render__control1(HtmlTextWriter __w, Control parameterContainer) in ...\Views\Shared\Site.Master:42
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +109
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +8
   System.Web.UI.Control.Render(HtmlTextWriter writer) +10
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +100
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +208
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +8
   System.Web.UI.Page.Render(HtmlTextWriter writer) +29
   System.Web.Mvc.ViewPage.Render(HtmlTextWriter writer) +56
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +100
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3060

When I try to include the insert functionality in your examples HierarchyServerSide or DetailsServerSide I get also NullReferenceException

[Jigar]

Hi Fabiano,

Yes it works, try to use <#= groupId #> in detail grid, ex. .Name("GroupGrid_RoleDetails_" + <#= GroupID #>).

I tried it with ajax and it works well.

Regards,

Jigar.

[Christian]

Hi Jigar

Thanks for your reply.

Unfortunately this doesn't help. I am using the serverbinding scenario and I think your solution is only for client side binding

[Atanas Korchev]

Hi Fabiano,

I am afraid you have discovered a bug. The workaround would be to use Ajax editing and binding if that's an option. If not - you can apply the fix easily by editing GridEditRowHtmlBuilder.cs from the source distribution:

1. Locate this code:
   
    var detailViewAdorner = new GridToggleDetailViewAdorner
    {
            Expanded = Row.DetailRow.Expanded
    };
2. Change it to:
   
    var detailViewAdorner = new GridToggleDetailViewAdorner
    {
            Expanded = Row.DetailRow != null ? Row.DetailRow.Expanded : false
    };
3. Then rebuild and use the output assembly in your project
   
   
   

There is one more thing that needs to be taken into consideration. Currently you need a commands column with an Edit command present in order to display the "insert" and "cancel" buttons.

Regards,
Atanas Korchev
the Telerik team