Grid / Hierarchy, the function of inner grid define in read method is not being called at all

[Bryan]

Outer Grid:

@(Html.Kendo().Grid(Model)
                .Name("assetTypeGrid")
                .Columns(columns =>
                {
                    columns.Bound(a => a.Type).ClientTemplate(@"<img src='/Content/Images/Pins/#:data.Type#' style='height: 32px; weight: 32px;' />").Width(100);
                    columns.Bound(a => a.Description).Title("Name").Width(200);
                    columns.Bound(a => a.Tabs).Title("Available Tab(s)").Width(200);
                    columns.Bound(a => a.AssetTypeId).Title("").Filterable(false).Sortable(false)
                        .ClientTemplate(createLink).Width(100);
                })
                .Sortable()
                .Pageable(pageable => pageable
                .ButtonCount(5))
                .Filterable(ftb => ftb.Mode(GridFilterMode.Row))
                .ClientDetailTemplateId("template")
                .DataSource(dataSource => dataSource
                .Ajax()
                .PageSize(20)
                .ServerOperation(false))
                )

Inner Grid:

<script id="template" type="text/kendo-tmpl">
       @(Html.Kendo().Grid<CIMSDashboard.ViewModels.AssetTemplateViewModel>()
       .Name("grid_#=Name#")
       .Columns(columns =>
       {
           columns.Bound(o => o.Types).Width(110);
           columns.Bound(o => o.Name).Width(110);
           columns.Bound(o => o.Description).Width(110);
       })

       .DataSource(dataSource => dataSource
           .Ajax()
           .PageSize(10)
           .Read(read => read.Action("GetAssetTemplates", "AccessRetriever", new { templateName = "Pipe" }))
        )
        .Pageable()
        .Sortable()
        .ToClientTemplate()
       )
   </script>

Script:

<script type="text/javascript">
        $(document).ready(function () {

            function dataBound() {
                this.expandRow(this.tbody.find("tr.k-master-row").first());
            }

        });

    </script>

Read Function:

public static List<AssetTemplateViewModel> GetAssetTemplates(string templateName)
        {
            using (MiniProfiler.Current.Step("Getting Asset template Details"))
            {
                var result = new List<AssetTemplateViewModel>();
                using (var context = ProfiledContext())
                {
                    var query = from ta in context.tblTemplate_Assets
                           join at in context.tblAssetTypes on ta.AssetType equals at.Name
                           join atl in context.tblLink_AssetTypeToTemplate_Assets on ta.keyTempAssetID equals atl.fk_Template_AssetID
                           where atl.fk_AssetType == templateName
                                select new AssetTemplateViewModel()
                                {
                                    Types = at.Logo,
                                    Name = ta.Name,
                                    Description = ta.Description
                                };

                    if (query.Any())
                    {
                        foreach (var q in query)
                        {
                            result.Add(q);
                        }
                    }
                }

                return result;
            }
        }

 

The above read function is not being called.. am I missing something?? the layout of inner grid is coming perfectly, its all about data is not being displayed.. it is not reaching my break point in AccessRetriver at all...   I've attached pictures of my output.. pls help me. Thank you in advance.

[Viktor Tachev]

Hi Bryan,

Make sure that the Read method of the nested Grid is using signature similar to the following. The GetData() method implements the logic for returning the records from the data source.

public ActionResult GetAssetTemplates(string templateName, [DataSourceRequest] DataSourceRequest request)
{
    return Json(GetData()
        .Where(item => item.TemplateName == templateName)
        .ToDataSourceResult(request));
}

In case you would like a live example on how you can implement Grid with hierarchical structure please refer to the example below.

• http://demos.telerik.com/aspnet-mvc/grid/hierarchy

Regards,
Viktor Tachev
Telerik by Progress