[Solved] Master/detail Grid detail binding doesn't fire

[william]

Hi All,

I have the following code Where Covers is a complex type on my view.

@(Html.Telerik().Grid<GRID.ViewModels.ComputerBreakdownRiskViewModel>()
    .Name("risksGrid")
    .Sortable()
    .DataKeys(keys => keys.Add(r => r.ComputerBreakdownRiskID))
    .ToolBar(commands => commands.Custom().ButtonType(GridButtonType.ImageAndText).Text("Add New Risk").HtmlAttributes(new { @class = "addRisk" }).Action("Create", "ComputerBreakdownRisk", new { policyZoneID = ViewData["policyZoneID"], sectionID = ViewData["sectionID"] }))
    .DataBinding(dataBinding =>
        {
            dataBinding.Ajax()
                .Select("_RisksIndex", "ComputerBreakdownSection", new { policyZoneID = ViewData["policyZoneID"], sectionID = ViewData["sectionID"] });
        })
    .Columns(columns =>
          {
              columns.Bound(r => r.ComputerBreakdownRiskID).Title("Edit")
                  .Template(r => @Html.ActionLink("Edit", "Edit", "ComputerBreakdownRisk",
                  new { riskID = r.ComputerBreakdownRiskID, policyZoneID = ViewData["policyZoneID"], sectionID = ViewData["sectionID"] }, new { @class = "editLink" }));
              columns.Bound(r => r.ComputerBreakdownRiskID).Title("Delete")
                  .Template(r => @Html.ActionLink("Delete", "Delete", "ComputerBreakdownRisk",
                  new { riskID = r.ComputerBreakdownRiskID, policyZoneID = ViewData["policyZoneID"], sectionID = ViewData["sectionID"] }, new { @class = "deleteLink" }));
              columns.Bound(r => r.Description).Width(200);
              columns.Bound(r => r.IndemnityPeriod).Width(50);
              columns.Bound(r => r.ManuallyRated);

          })
    .RowAction(row =>
    {
        if (row.IsAlternate) { row.HtmlAttributes["style"] = "background:aliceblue;"; }
    })
    .ClientEvents(events => events.OnRowDataBound("covers_onRowDataBound"))
    .DetailView(detailView => detailView.ClientTemplate(
        Html.Telerik().Grid<GRID.ViewModels.ComputerBreakdownRiskViewModel>()
            .Name("detailview_<#= ComputerBreakdownRiskID #>")
            .Columns(columns =>
            {
                columns.Bound(co => co.Covers.Select(m => m.Name));
            })
            .DataBinding(dataBinding =>
            {
                dataBinding.Ajax()
                    .Select("_CoverDetailForRiskHierarchyAjax", "ComputerBreakdownRisk", new { riskID = "<#= ComputerBreakdownRiskID #>" });
            })
            .ToHtmlString()
    ))
)

When the grid attempts to load it errors on the detail bound column with : Bound columns require a field or property access expression. If I replace the binding with a non complex column such that I map :

columns.Bound(co => co.Description);

then I get no complaint, My Master data displays, but the Description on my detail is empty.  in all cases, my _coverDetailForRiskHierearchyAjax method seems not to get fired. So how does the detail bind to the master on initial load? If it was binding I would expect to at least see the description even though I really want an enumeration of my complex type

[Atanas Korchev]

Hi William,

 Indeed bound columns support only member expressions. You cannot use such a complex expression in a bound column. 

The rest of the code looks correct and should work properly unless there is some JavaScript error. If you need further assistance please send us a small project reproducing the problem.

All the best,
Atanas Korchev
the Telerik team