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The Blazor TreeView is a UI component that displays hierarchical data, such as a table of contents, code examples, and file directories, in a tree structure. TreeView is feature-rich, supporting data binding, loading on demand, multiple selection, drag and drop, node editing, checkboxes, templates, and more in both Blazor WebAssembly (WASM) and Blazor Server apps.

Why choose Syncfusion Blazor TreeView?

Blazor treeview high performance

High performance

Load on demand (lazy load) is enabled by default to reduce bandwidth usage when consuming large amounts of data. Only first-level nodes are loaded initially, and then child nodes are loaded when their parent node is expanded.

Blazor treeview seamless data binding

Seamless data binding

Bind data to the TreeView component from any valid data source in JSON format. The tree data can be local or remote and retrieved via various adapters, such as OData, OData V4, URL, JSON, and web API.

Blazor treeview resolution

Adapts to any resolution

TreeView has a highly responsive layout and an optimized design for desktops, touchscreens, and phones. It works well on all mobile phones that use iOS, Android, or Windows OS.

Blazor treeview template designs

Create your own template designs

It can be customized via node template support, which allows you to design a custom structure for tree nodes. Node templates can be used for parent nodes, child nodes, or both, and can include images and any custom element structure.

Blazor treeview hierarchical data

Visualize hierarchical data

The Blazor TreeView is a graphic user interface element that displays hierarchical data as a tree structure. It can be populated with nested arrays of JSON objects from a hierarchical data source.

Blazor treeview customizable themes

Attractive, customizable themes

Cutting-edge design with several built-in themes, such as Fluent, Tailwind CSS, Bootstrap, Material, and Fabric. Utilize the online Theme Studio tool to customize themes of treeview easily.

Blazor treeview globalization and localization

Globalization and localization

Enable users from different locales to use the component by formatting dates, currency, and numbering to suit preferences.

Blazor TreeView Code Example

Easily get started with the Blazor TreeView using a few simple lines of C# code example as demonstrated below, Also explore our Blazor TreeView Example that shows you how to render the TreeView component in Blazor.

@using Syncfusion.Blazor.Navigations
<SfTreeView TValue="MailItem">
<TreeViewFieldsSettings TValue="MailItem" Id="Id" DataSource="@MyFolder" Text="FolderName" ParentID="ParentId" HasChildren="HasSubFolders" Expanded="Expanded"></TreeViewFieldsSettings>

public class MailItem
    public string Id { get; set; }
    public string ParentId { get; set; }
    public string FolderName { get; set; }
    public bool Expanded { get; set; }
    public bool HasSubFolders { get; set; }
List<MailItem> MyFolder = new List<MailItem>();
protected override void OnInitialized()
    MyFolder.Add(new MailItem
        Id = "1",
        FolderName = "Inbox",
        HasSubFolders = true,
        Expanded = true
    MyFolder.Add(new MailItem
        Id = "2",
        ParentId = "1",
        FolderName = "Categories",
        Expanded = true,
        HasSubFolders = true
    MyFolder.Add(new MailItem
        Id = "3",
        ParentId = "2",
        FolderName = "Primary"
    MyFolder.Add(new MailItem
        Id = "4",
        ParentId = "2",
        FolderName = "Social"
    MyFolder.Add(new MailItem
        Id = "5",
        ParentId = "2",
        FolderName = "Promotions"

Blazor TreeView icon and images

Tree node with icons and images

Display nodes with labels and icons or images to present content in a more readable format. This is helpful in making a typical directory tree and file system.

Check box support

Built-in support for check boxes allows users to select more than one item. The Blazor TreeView check boxes also have a tri-state mode that is applicable only for parent nodes. In this mode, the parent node will go into an indeterminate state when the child nodes are partially checked.

Blazor TreeView checkbox support

Drag and drop

In Blazor TreeView, Nodes can be dragged and dropped at all levels of the same TreeView.

Blazor TreeView component drag and drop inside a tree

Inside the tree

Tree nodes can be dragged and dropped from one parent node to another within the same level or different levels.

Blazor TreeView component drag and drop between trees

Outside the tree

Extending the drop behavior allows users to drop tree nodes from one TreeView to another TreeView.

Blazor TreeView component dragging and dropping to external container

To an external container

Drop tree nodes to any external container or component by extending the TreeView node drop action.

Multiple node selection

Blazor TreeView allows users to select multiple nodes. When the drag-and-drop feature is enabled, all the selected nodes can be dragged at the same time.

Blazor TreeView multiple node selection

Blazor TreeView multiple node drag and drop

Blazor TreeView editable nodes

Editable nodes

Edit the tree nodes’ label text on the client side by double-clicking it. While editing TreeView nodes, the TreeView data source will also be updated by the modified data.

Sorting tree nodes

Render the tree view nodes in ascending or descending order based on the label text to provide users improved readability.

Blazor TreeView Sorting tree nodes

Blazor TreeView node template

Node template

Customize the TreeView using the node template support to define a custom structure for tree nodes. You can use node templates for parent nodes, child nodes, or both, and include images and custom elements.

Expand collapse icons

Easily customize the TreeView expand and collapse icons based on your application requirements.

Blazor TreeView expand collapse icons customization

Blazor TreeView tooltip

Tooltips for tree nodes

It supports tooltips for tree nodes that display information about the nodes while hovering over them. You can bind a tooltip from a data source along with node fields.

Context menu

A context menu can be integrated with the Blazor TreeView component to open when a node is right-clicked. The menu helps users perform node manipulations such as adding, removing, and renaming nodes.

Blazor TreeView context menu

Blazor TreeView text wrap

Text wrap

A node’s text wraps when it reaches edge of the TreeView. The node’s height will be adjusted automatically based on the content.

Tree Node Customization

It allows you to customize the tree nodes by level. For example, apply specific styles to leaf nodes, first child nodes, and second level nodes, etc.

Blazor TreeView TreeNode customization

Blazor TreeView TreeNode validation

Tree Node Validation

You can add validation to the tree node’s text on editing like required, a minimum or maximum length, etc.


Keyboard navigation in Blazor TreeView

Keyboard navigation

The Blazor TreeView component ensures that every cell is accessible using the keyboard. Major features like sort, select, and edit can be performed using keyboard commands alone; no mouse interaction is required. This helps in creating highly accessible applications using this component.

Accessibility and screen reader support in Blazor TreeView

Screen reader

The Blazor TreeView has complete WAI-ARIA accessibility support. The Data Grid UI includes high-contrast visual elements that help visually impaired people to have the best viewing experience. Also, valid UI descriptions are easily accessible through assistive technologies such as screen readers.

Show right-to-left language in Blazor TreeView

Right to left (RTL)

Right-to-left rendering allows displaying the text and layout of the TreeView from right to left. This improves the user experience and accessibility for RTL languages.

Other supported frameworks

TreeView is also available in Angular, React, Vue, and JavaScript frameworks. Check out the different TreeView platforms from the links below,

Supported browsers

The Blazor TreeView works well with all modern web browsers such as Chrome, Firefox, Microsoft Edge, Safari, and Opera.

Supported browsers

Blazor Components – 85+ UI and DataViz Components

Frequently Asked Questions

The Syncfusion Blazor TreeView supports the following features:

  • Display hierarchical data in a tree-view structure.
  • Load a wide range of nodes with optimal performance.
  • Flexible data binding with support to use data sources such as Web API, OData, Entity Framework, and more.
  • Drag and drop multiple selected tree nodes anywhere.
  • Select multiple nodes using built-in check boxes.
  • Edit node text inline with editable nodes support.
  • Easily customize nodes, expand icons, and collapse icons.
  • One of the best Blazor Tree View in the market that offers feature-rich UI to interact with the software.
  • Simple configuration and APIs.
  • Supports all modern browsers.
  • Touch-friendly and responsive.
  • Extensive demos, documentation, and videos to learn quickly and get started with Blazor Tree View.

You can find our Blazor Tree View demo, which demonstrates how to render and configure the TreeView.

No, this is a commercial product and requires a paid license. However, a free community license is also available for companies and individuals whose organizations have less than $1 million USD in annual gross revenue, 5 or fewer developers, and 10 or fewer total employees.

A good place to start would be our comprehensive getting started documentation.

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