Using the <i class="emphasis">TreeNode</i> Class

Using the TreeNode Class

Tree views display nodes in a hierarchical structure, and each node in a tree view is a TreeNode object. Here is the class hierarchy of the TreeNode class:

Object
   MarshalByRefObject
      TreeNode

You can find the notable public properties of TreeNode objects in Table 10.6 and the notable public methods in Table 10.7.

Table 10.6: Noteworthy public properties of *TreeNode* objects.
Property	Means
Bounds	Gets the actual bounds of the tree node.
Checked	Gets/sets whether the tree node is checked.
FirstNode	Gets the first child tree node.
FullPath	Gets the path from the root node to the current node.
ImageIndex	Gets/sets the image list index of the image displayed for a node.
Index	Gets the location of the node in the node collection.
IsEditing	Gets whether the node can be edited.
IsExpanded	Gets whether the node is expanded.
IsSelected	Gets whether the node is selected.
IsVisible	Gets a value specifying if the node is visible.
LastNode	Gets the last child node.
NextNode	Gets the next sibling node.
NextVisibleNode	Gets the next visible node.
NodeFont	Gets/sets the font for the node.
Nodes	Gets the collection of nodes in the current node.
Parent	Gets the parent node of the current node.
PrevNode	Gets the previous sibling node.
PrevVisibleNode	Gets the previous visible node.
SelectedImageIndex	Gets/sets the image index for the image to display when a node is selected.
Text	Gets/sets the text for a node's label.
TreeView	Gets the node's parent tree view.

Table 10.7: Noteworthy public methods of *TreeNode* objects.
Method	Means
BeginEdit	Starts editing of the node's label.
Collapse	Collapses a node.
EndEdit	Ends editing of the node's label.
EnsureVisible	Makes sure the node is visible, scrolling the tree view if needed.
Expand	Expands a node.
ExpandAll	Expands all child nodes.
GetNodeCount	Gets the number of child nodes.
Remove	Removes the current node.
Toggle	Toggles the tree node between the expanded and collapsed states.