Treeview parent/child relationship not working

[Robert]

I created a treeView but for some reason, the data children are not included in the drop-down but separate. How would I set this up to have the children fall under their parent?

 <TelerikTreeView Data="@FlatData" @bind-ExpandedItems="@ExpandedItems">
                        <TreeViewBindings>
                            <TreeViewBinding ParentIdField="FlatData.Parent" />
                        </TreeViewBindings>
                    </TelerikTreeView>

@code {

 IEnumerable<TreeItem> FlatData { get; set; }
 IEnumerable<object> ExpandedItems { get; set; } = new List<TreeItem>();

private void CreateDeviceTreeList()
    {
        List<TreeItem> items = new List<TreeItem>();

        int count = 0;
        foreach(var a in devices.Items)
        {            
            items.Add(new TreeItem(){
               Id = count,
               Parent = null,
               Text = a.Name,
               HasChildren = true
            });
            count++;
            items.Add(new TreeItem(){
               Id = count,
               Parent = count-1,
               Text = a.Group,
               HasChildren = false
            });
            count++;
            items.Add(new TreeItem(){
               Id = count,
               Parent = count-1,
               Text = a.Sensor,
               HasChildren = false
            });
            count++;            
        } 
        FlatData = items;
        ExpandedItems = FlatData.Where(x => x.HasChildren == true).ToList();
        StateHasChanged();

    }

 protected async override void OnInitialized()
{

CreateDeviceTreeList();

}

}

 

 

 

 

 

 

[Dimo]

Hello Robert,

ParentIdField="FlatData.Parent" means that TreeItem has a FlatData property, which is an object and it has a nested Parent property. That is obviously not that case, so you need 

ParentIdField="Parent"

Regards,
Dimo
Progress Telerik