6th. Data filtering and Sorting

6th. Data filtering and Sorting

A. TreeView control: A tree control that is used to display text or data as nodes, in the order in which they are organized in a hierarchical structure.

1. Common Properties and Event Nodes of the TreeView control Nodes

ImageList storing the image of the node

ImageIndex node default image index

selectedImageIndex the index of the image when the node is selected

SelectedNode the currently selected parent node

AfterSelect Node selected post event

Two. node of the TreeView control

The TreeView control consists of a single node, each of which is a TreeNode type.

Common properties of a node:

Three. Text on the text node

ImageIndex node default image index, which is the same as the TreeView setting by default

selectedImageIndex the image index when the node is selected, the default is the same as the TreeView setting

Four. Level node depth, starting from 0

Nodes the collection of child nodes that the current node contains

ParentNode The parent node of the current node

Two. Making a tree-like menu

1. Add a new TreeView control to the form, set name to Tvmenu.

2. In the Properties window, click the button next to the nodes property to invoke the TreeView editor.

3. Add the root node, then add the child nodes, set the Name property and the Text property

6th. Data filtering and Sorting