Design time error in cshtml: Cannot convert lambda expression to type 'string' because it is not a delegate type

[Kevin]

I am getting no intellisense and design time errors when using the Bound method to declare columns.  When I run the site it works fine, but isn't the whole point of using the lambda instead of magic strings so I can get accurate design time errors?

In the following code, I get design time errors for each of the lambdas in the columns.Bound declarations.  Am I doing something wrong?

@(Html.Kendo().Grid<KBMaxLive.Domain.KBUser>()
    .Name("grid")
    .Columns(columns => {
        columns.Bound(u => u.Email).ClientTemplate("<a>#: Email #</a>");
        columns.Bound(u => u.IDUserRole);
        columns.Bound(u => u.FirstName);
        columns.Bound(u => u.LastName);
        columns.Bound(u => u.IsOnLine);
    })
    .Pageable(paging => paging.Enabled(true).PageSizes(new int[]{5, 10, 20, 50}))
    .Sortable()
    .Filterable()
    .Groupable()
    .Selectable(select => select.Type(GridSelectionType.Row).Mode(GridSelectionMode.Multiple))
    .DataSource(dataSource => dataSource
        .Ajax()
        .Read(read => read.Action("Users_Read", "Users"))
        .PageSize(20))
    
  )  

[Dimo]

Hello Kevin,

The provided code snippet works correctly on my side. Feel free to send a standalone project for inspection after checking whether there is some problem not related to the Grid.

Regards,
Dimo
the Telerik team

[Ravi]

Hello,

I am also facing the similar error please suggest me. find my code below

@{Html.Kendo().Grid(Model)

        .Name("GridSam")
        .DataSource(dataSource => dataSource
            .Server()
                     .PageSize(20)
            .Model(model => model.Id(p => p.ProductID))
                )

        .Columns(c =>
        {
            c.AutoGenerate(column =>
            {
                //customize autogenereted column's settings                                                   
                column.Width = "150px";
                column.Bound(p => p.ProductID).Groupable(false);
                column.Bound(p => p.ProductID);

            });
        })

          .Resizable(resizing => resizing.Columns(true))
          .Scrollable(scrolling => scrolling.Enabled(true).Height(600))
          .Sortable(sorting => sorting.Enabled(true))
          .Groupable(grouping => grouping.Enabled(true))
          .Filterable(filtering => filtering.Enabled(true))
          .Reorderable(reorder => reorder.Columns(true))
          .Pageable(Pageable => Pageable.Enabled(true).PreviousNext(true).Input(true).PageSizes(true))
          .Selectable(selectable => selectable.Mode(GridSelectionMode.Single))
          .Render();
                }

Regards,
Ravi

 

 

 

[Keith]

Fast forward 10 years, and I'm seeing this same problem with Visual Studio 2019 and an ASP.NET MVC5 project.

Telerik folks: How about some guidance or suggestions here?

[Anton Mironov]

Hi Keith,

Thank you for contacting the team. 

As my colleague pointed out in the last reply, the issue is probably caused by additional logic added.

The fastest route to getting you up and running is if you could provide a runnable, isolated, sample project. Examining this project will let us replicate the issue locally and further troubleshoot it.

Attached is a sample project that implements a Kendo UI Grid that is working out of the box. Feel free to use it as a template.

Looking forward to hearing back from you.


Kind Regards,
Anton Mironov