How to use the VB TreeView control?

1 year ago
William Carter
2 minutes

The TreeView control is used to display hierarchical data in a tree-like structure. To use the TreeView control, it first needs to be added to a form or user control.

In VB, you can use the TreeView control by following these steps:

  1. Add a TreeView control to a form or user control. You can find the TreeView control in the toolbox and then drag and drop it into the design view of the form or user control.
  2. You can set the properties of the TreeView control. You can set properties such as Name, Dock, Size, etc. in the property window. The Name property is used to set the name of the control for referencing in the code.
  3. Add tree nodes. You can add tree nodes through code or through the node editor in the design view. In order to add tree nodes in code, you can use the Nodes collection of the TreeView control, for example:
TreeView1.Nodes.Add("Node 1")  '添加一个根节点
TreeView1.Nodes(0).Nodes.Add("Node 2")  '在第一个根节点下添加一个子节点
TreeView1.Nodes(0).Nodes(0).Nodes.Add("Node 3")  '在第一个子节点下添加一个子节点
  1. Add event handlers for nodes. Event handlers can be added to nodes of the TreeView control to respond to events such as clicking, expanding, collapsing, etc. Event handlers can be added through code or the properties window in the design view.
  2. Other features of the TreeView control. The TreeView control also offers other features such as node editing, drag and drop, and icon settings. These features can be set through code or the properties window.

The above are the basic steps for using the TreeView control in VB, and the specific usage can be adjusted and expanded according to actual needs.

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