Blazorise TreeView component

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API

Parameters

Parameter	Description	Type	Default
`AutoExpandAll`	Specifies if the treenode should be automatically expanded. Note that it can happen only once when the tree is first loaded.	`bool`	`false`
`ChildContent`	Specifies the content to be rendered inside this TreeView.	`RenderFragment`	`null`
`CollapseIconName`	Specifies the name of the treenode collapse icon.	`IconName`	`ChevronDown`
`CollapseIconSize`	Specifies the size of the treenode collapse icon.	`IconSize?`	`null`
`CollapseIconStyle`	Specifies the style of the treenode collapse icon.	`IconStyle?`	`null`
`Draggable`	Enables TreeView nodes to be dragged with the browser drag-and-drop API.	`bool`	`false`
`ExpandedNodes`	List of currently expanded TreeView items (child nodes).	`IList<TNode>`	`new List<TNode>()`
`ExpandIconName`	Specifies the name of the treenode expand icon.	`IconName`	`ChevronRight`
`ExpandIconSize`	Specifies the size of the treenode expand icon.	`IconSize?`	`null`
`ExpandIconStyle`	Specifies the style of the treenode expand icon.	`IconStyle?`	`null`
`NodeContent`	Template to display content for the node	`RenderFragment<TNode>`	`null`
`NodeContextMenuPreventDefault`	Used to prevent the default action for a NodeContextMenu event.	`bool`	`false`
`Nodes`	Collection of child TreeView items (child nodes)	`IEnumerable<TNode>`	`null`
`Reorderable`	Enables dropping a dragged node before another node instead of only dropping it as a child.	`bool`	`false`
`SelectedNode`	Currently selected TreeView item/node.	`TNode`	`null`
`SelectedNodes`	Currently selected TreeView items/nodes.	`IList<TNode>`	`null`
`SelectionMode`	Specifies the selection mode of the TreeView. Possible values:`Single`, `Multiple`	`TreeViewSelectionMode`	`TreeViewSelectionMode.Single`
`Virtualize`	Controls if the child nodes, which are currently not expanded, are visible. This is useful for optimizing large TreeViews. See Docs for virtualization for more info.	`bool`	`false`

Events

Event	Description	Type
`CanDragNode`	Determines whether the specified node can be dragged.	`Func<TNode, bool>`
`CanDropNode`	Determines whether a proposed drop operation is allowed.	`Func<TreeViewNodeDragEventArgs<TNode>, bool>`
`DisabledNodeStyling`	Defines styling applied to disabled nodes.	`Action<TNode, NodeStyling>`
`ExpandedNodesChanged`	Notifies when the collection of expanded nodes has changed.	`EventCallback<IList<TNode>>`
`GetChildNodes`	Gets the list of child nodes for each node.	`Func<TNode, IEnumerable<TNode>>`
`GetChildNodesAsync`	Gets the list of child nodes for each node.	`Func<TNode, Task<IEnumerable<TNode>>>`
`HasChildNodes`	Indicates if the node has child elements.	`Func<TNode, bool>`
`HasChildNodesAsync`	Indicates if the node has child elements.	`Func<TNode, Task<bool>>`
`IsDisabled`	Indicates the node's disabled state. Used for preventing selection.	`Func<TNode, bool>`
`NodeContextMenu`	The event is fired when the node is right clicked to show the context menu.	`EventCallback<TreeViewNodeMouseEventArgs<TNode>>`
`NodeDropped`	Occurs when a node is dropped on a valid target. Remarks When this callback is not handled, the TreeView tries to move the node in the bound mutable collections automatically. When handled, this callback overrides the built-in move behavior.	`EventCallback<TreeViewNodeDragEventArgs<TNode>>`
`NodeStyling`	Defines styling applied to nodes.	`Action<TNode, NodeStyling>`
`SelectedNodeChanged`	Notifies when the selected TreeView node has changed.	`EventCallback<TNode>`
`SelectedNodesChanged`	Notifies when the selected TreeView nodes has changed.	`EventCallback<IList<TNode>>`
`SelectedNodeStyling`	Defines styling applied to selected nodes.	`Action<TNode, NodeStyling>`

Methods

Method	Description	Return	Parameters
`CollapseAll`	Collapses all the expanded TreeView nodes.	`Task`
`ExpandAll`	Expands all the collapsed TreeView nodes.	`Task`
`ReloadNode`	Triggers the reload of a specific node and its subtree.	`Task`	`TNode node`
`Reload`	Triggers the reload of the Nodes.	`Task`
`RemoveNode`	Attempts to find and remove an existing node from the Treeview.	`Task`	`TNode node`
`SelectNode`	Selects the node when in single selection mode.	`void`	`TNode node`
`ToggleCheckNode`	Toggles the checked state of the node when in multiple selection mode.	`Task`	`TNode node`

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