ant-design-blazor/components/tree/TreeNode.razor

@namespace AntDesign
@inherits AntDomComponentBase

@if (IsRealDisplay)
{
    <CascadingValue Value="this" Name="SelfNode">
        <div @key="NodeId" class="@TreeNodeClassMapper.Class">

            <TreeIndent TreeLevel="@TreeLevel"></TreeIndent>

            @if (TreeComponent.ShowExpand)
            {
                <TreeNodeSwitcher OnSwitcherClick="OnSwitcherClick"></TreeNodeSwitcher>
            }

            @if (TreeComponent.Checkable)
            {
                <TreeNodeCheckbox OnCheckBoxClick="OnCheckBoxClick"></TreeNodeCheckbox>
            }

            <TreeNodeTitle></TreeNodeTitle>

        </div>
    </CascadingValue>
}
<CascadingValue Value="this" Name="Node">
    @if (DataItem != null)
    {
        foreach (var item in ChildDataItems)
        {
            <TreeNode DataItem="@item"></TreeNode>
        }
    }
    else
    {
        @Nodes
    }
</CascadingValue>