TreeList with Id and parentId string type

[Michel]

Hi,

I have a treelist where the parentID is a GUID so it is defined as a string.

The child items don't appears.

It seems that string is not supported in ParentID.

Any turn around for that?

Best regards.

[Dimo]

Hello Michel,

The TreeView item relationships can work with Guid and string too. Please make sure that:

• The ID and parent ID values are set correctly in the data.
• The IdField and ParentIdField parameters are configured correctly.

<TelerikTreeList Data="@TreeListData"
                 IdField="@nameof(SampleModel.Id)"
                 ParentIdField="@nameof(SampleModel.ParentId)"
                 Pageable="true"
                 Sortable="true">
    <TreeListColumns>
        <TreeListColumn Field="@nameof(SampleModel.Id)" />
        <TreeListColumn Field="@nameof(SampleModel.ParentId)" />
        <TreeListColumn Field="@nameof(SampleModel.Name)" Expandable="true" />
    </TreeListColumns>
</TelerikTreeList>

@code {
    private List<SampleModel> TreeListData { get; set; } = new();

    private List<string> SearchableFields = new List<string> { nameof(SampleModel.Name) };

    protected override void OnInitialized()
    {
        for (int i = 1; i <= 9; i++)
        {
            TreeListData.Add(new SampleModel()
            {
                Name = $"Name {i}"
            });
        }

        for (int i = 0; i < TreeListData.Count; i++)
        {
            if (i > 2)
            {
                TreeListData[i].ParentId = TreeListData[i % 3].Id;
            }
        }
    }

    public class SampleModel
    {
        public string Id { get; set; } = Guid.NewGuid().ToString();
        public string? ParentId { get; set; }
        public string Name { get; set; } = string.Empty;
    }
}

 

Regards,
Dimo
Progress Telerik