Error: Templates can be used only with field access, property access, single-dimension array index, or single-parameter custom indexer expressions.

[Will Yeung]

Hi, 

Thanks for the great product! :)

After upgrading from 2009 Q3 to 2010 Q1 and MVC rc1 to MVC rc2, my this expression has error:

Html.Telerik().Grid(Model)

        .Name("ASSETGrid")

         .Columns(columns =>

         {

             columns.Bound(x => x.TX_TYPE).Title("Type");

             columns.Bound(x => x.TX_REFNO).Title("Ref");

             columns.Bound(x => x.DESCRIPTION).Title("Desc");

             columns.Bound(x => x.CREATOR).Title("Creator");

             columns.Bound(x => x.CREATION_DATE.ToString("yyyy-MM-dd")).Title("Created");

             columns.Bound(x => x.LAST_UPDATE_DATE).Format("{0:yyyy-MM-dd}").Title("Last updated");

             columns.Bound(x => x.TX_STATUS).Title("Status");

             columns.Bound(x =>

                 (x.CurrentState.CanSelect(AppHelper.GetCurrentUser(), AppHelper.GetCurrentUserRole()) ? Html.ActionLink("Select", "SelectAsCurrent", new { TX_KEY = x.TX_KEY }).ToString() : Html.ActionLink("Details", "Details", new { TX_KEY = x.TX_KEY }).ToString()) + " " +

                 (x.CurrentState.CanAccept(AppHelper.GetCurrentUser(), AppHelper.GetCurrentUserRole()) ? Html.ActionLink("Accept", "Accept", new { TX_KEY = x.TX_KEY }).ToString() + " " : "") +

                 (x.CurrentState.CanCancel(AppHelper.GetCurrentUser(), AppHelper.GetCurrentUserRole()) ? Html.ActionLink("Cancel", "Cancel", new { TX_KEY = x.TX_KEY }).ToString() + " " : "") +

                 (x.CurrentState.CanReject(AppHelper.GetCurrentUser(), AppHelper.GetCurrentUserRole()) ? Html.ActionLink("Reject", "Reject", new { TX_KEY = x.TX_KEY }).ToString() + " " : "") +

                 (x.CurrentState.CanReturn(AppHelper.GetCurrentUser(), AppHelper.GetCurrentUserRole()) ? Html.ActionLink("Return", "Return", new { TX_KEY = x.TX_KEY }).ToString() + " " : "") +

                 (x.CurrentState.CanSubmit(AppHelper.GetCurrentUser(), AppHelper.GetCurrentUserRole()) ? Html.ActionLink("Submit", "Submit", new { TX_KEY = x.TX_KEY }).ToString() + " " : "") +

                 ""

                 ).Encoded(false).Title("Action");

         })

        //.Filterable()

        .Pageable()

        .Sortable()

        .Render();

InvalidOperationException occurred, 

Templates can be used only with field access, property access, single-dimension array index, or single-parameter custom indexer expressions.

in line 49, UI\Grid\Columns\GridBoundColumn.cs file

#if MVC2

            Metadata = ModelMetadata.FromLambdaExpression(expression, new ViewDataDictionary<TModel>()); (<<----- error)

            Title = Metadata.DisplayName;

            Format = Metadata.DisplayFormatString;

            Visible = Metadata.ShowForDisplay;

#endif

    

it seems I cannot use expression anymore~~ :(

Looking forward to hearing from you

Thanks~

Best wishes, always

Billy

[Atanas Korchev]

Hello Will Yeung,

Indeed we now support only member expressions (due to MVC2 Metadata requirements). As a workaround I suggest you use the Template property to specify how you want your data displayed:

Old:
columns.Bound(x => x.CREATION_DATE.ToString("yyyy-MM-dd"))
New"
columns.Bound(x => x.CREATION_DATE).Template(x => {
%>
           <%= x.CREATION_DATE.ToString("yyyy-MM-dd") %>
<%
});

Regards,
Atanas Korchev
the Telerik team

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.

[Will Yeung]

wowowo Atanas Korchev

you answer is super fast!

Excellent work around! you solved my problem.

Thank you very much! :)

[Guillaume]

I got the same error. The following code :

<%= Html.Telerik().Grid(Model)
        .Name("Termes")
             .DataBinding(dataBinding => dataBinding
                    .Ajax()
                        .Select("EditingServerSide", "Termes")
                        .Insert("Ajouter", "Termes")
                        .Update("Sauver", "Termes")
                        .Delete("Effacer", "Termes")
            )
        .DataKeys(keys =>
        {
            keys.Add(t=>t.ID);
        })
        .Toolbar(commands => commands.Insert())
        .Columns(columns =>
        {
            columns.Bound(t=>t.TexteCourt).Width(100);
            columns.Bound(t=>t.TexteLong).Width(500);
            columns.Command(commands =>
            {
                commands.Edit();
                commands.Delete();
            }).Width(180);
        })
        .Pageable()
        .Sortable()

%>

fails with the title error.

It works if I remove the command columns..

[Marco]

Hello Guillame,

did you found something? 

i'm facing the same error :(

this is my grid 

 <% Html.Telerik().Grid(Model)
            .Name("Grid")
            .Toolbar(commands => commands.Insert())
            .DataKeys(dataKeys => dataKeys.Add(o => o.id))
            .Columns(columns =>
            {
                columns.Bound(o => o.idUnidade).Title("Unidade(s)");
                columns.Bound(o => o.descricao).Width(300);
                columns.Bound(o => o.data).Width(100);
                columns.Bound(o => o.QtdRefDiarias).Width(80);
                columns.Template(o =>
                {
                    %>
                    <a href="<%= Url.Action("EmentasPratos", "Ementas", new {IdEmenta = o.id })%>" title="Pratos"><img src="../../Content/images/detail.png" style="border:none;"  /></a>
                    <%
                }).Title("Pratos");
                columns.Command(commands => commands.Edit()).Width(200);
            })
            .DataBinding(dataBinding => dataBinding
                .Server()
                    .Update("Update", "Ementas")
                    .Select("Create", "Ementas")
                    .Insert("Insert", "Ementas"))
            .Pageable()
            .Sortable()
            .Filterable()
            .Render();
    %>

and if i remove edit command it work....what could be wrong?

on controller i just pass a List<DTO>  

return view(List<DTO>)

Best Regards

[Atanas Korchev]

Hi Marco,

You can check this forum thread.

Best wishes,
Atanas Korchev
the Telerik team

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.

[Guillaume]

Thanks !

[Marco]

Thanks again Atanas.

Best Regards