Hierarchy Doubt

Radzen.Blazor Components
1

Hello, good morning.
Once again I would like to congratulate you for your great work and I would like to take this opportunity to congratulate you for the holidays.
On the other hand, I wanted to ask you about Hierarchy... I'm trying to implement it and I don't see what could be the bug.

I have this code on the page:

image
image886×511 102 KB

An this other in C#

    DataGridExpandMode expandMode = DataGridExpandMode.Single;
    void OnDeliveryDataGridRender(DataGridRenderEventArgs<CropuServerWeb.Models.APT.LmsMsDeliveryNote> args)
    {
        if (args.FirstRender)
        {
            InvokeAsync(() => args.Grid.ExpandRow(args.Grid.View.Where(c => c.IC_LmsMsDeliveryNote_Details.Any()).FirstOrDefault()));
        }
    }

    async void RowRender(RowRenderEventArgs<CropuServerWeb.Models.APT.LmsMsDeliveryNote> args)
    {   
        args.Expandable = args.Data.IC_LmsMsDeliveryNote_Details.Any();
    }

But the erro that i get is:

image
image886×215 71.4 KB

IC_LmsMsDeliveryNote_Details es un ICollection is implemented in public partial class LmsMsDeliveryNote

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image886×51 23.7 KB

I don't know what to try to make it work, can you think of anything?
Thank you very much for everything and Merry Christmas.

2

Accordion to the exception this is null. You need to extend your check like this:

        args.Expandable = args.Data.IC_LmsMsDeliveryNote_Details?.Any() == true;
3

Great! thanks for your response.