To select TreeView nodes in different ways, you need to set the SelectionMode property of C1TreeView. The SelectionMode property accepts the following values from the C1TreeViewSelectionMode enumeration:

• Multi: Allows you to select multiple nodes (parent or child) in TreeView. You can select multiple nodes either in a contiguous or a non-contiguous manner. To select multiple nodes in a contiguous manner, hold the SHIFT key while clicking on nodes. And to select nodes in a non-contiguous manner, hold the CTRL key while clicking on nodes.
• MultiSibling: Allows you to select multiple nodes in a contiguous or a non-contiguous manner using SHIFT or CTRL keys respectively, within a parent node only.
• None: Does not allow you to select any node in TreeView.
• Single (default value): Allows you to select only one node (parent or child) in TreeView at a time.

Below is the sample code snippet setting the SelectionMode property.

' set the SelectionMode property to Multi
C1TreeView1.SelectionMode = C1.Win.TreeView.C1TreeViewSelectionMode.Multi

// set the SelectionMode property to Multi
c1TreeView1.SelectionMode = C1.Win.TreeView.C1TreeViewSelectionMode.Multi;

Contiguous Selection

Non-contiguous Selection

You can also select a node by setting the Selected property of C1TreeNode to True.

The following code snippet demonstrates how to set the property.

' enable the Selected property for the first parent node
C1TreeView1.Nodes(0).Selected = True

// enable the Selected property for the first parent node
c1TreeView1.Nodes[0].Selected = true;

The node for which the property is set gets selected as shown below.

Furthermore, you can also select a node at runtime by right-clicking it. This is the default behavior of TreeView. However, you can change this behavior by setting RightClickSelect property of the C1TreeView class as false.