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TreeNode.PrevNode Property

Gets the previous sibling tree node.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)

public TreeNode PrevNode { get; }
/** @property */
public TreeNode get_PrevNode ()

public function get PrevNode () : TreeNode

Not applicable.

Property Value

A TreeNode that represents the previous sibling tree node.

The PrevNode is the previous sibling TreeNode in the TreeNodeCollection stored in the Nodes property of the tree node's parent TreeNode. If there is no previous tree node, the PrevNode property returns a null reference (Nothing in Visual Basic).

The following code example selects the appropriate TreeNode after determining if the TreeNode passed in is selected and which TreeNode to select. This example requires that you have a Form with a TreeView control that has a TreeNodeCollection containing several TreeNode objects. It also requires that you have a ComboBox with the following items: "Previous", "PreviousVisible", "Next", "NextVisible", "First", and "Last".

private void SelectNode(TreeNode node)
{
    if(node.IsSelected)
    {
        // Determine which TreeNode to select.
        switch(myComboBox.Text)
        {
            case "Previous":
                node.TreeView.SelectedNode = node.PrevNode;
                break;
            case "PreviousVisible":
                node.TreeView.SelectedNode = node.PrevVisibleNode;
                break;
            case "Next":
                node.TreeView.SelectedNode = node.NextNode;
                break;
            case "NextVisible":
                node.TreeView.SelectedNode = node.NextVisibleNode;
                break;
            case "First":
                node.TreeView.SelectedNode = node.FirstNode;
                break;
            case "Last":
                node.TreeView.SelectedNode = node.LastNode;
                break;
        }
    }
    node.TreeView.Focus();
}

private void SelectNode(TreeNode node)
{
    if (node.get_IsSelected()) {
        // Determine which TreeNode to select.
        if (myComboBox.get_Text().Equals("Previous")) {
            node.get_TreeView().set_SelectedNode(node.get_PrevNode());
        }
        else {
            if (myComboBox.get_Text().Equals("PreviousVisible")) {
                node.get_TreeView().set_SelectedNode(node.
                    get_PrevVisibleNode());
            }
            else {
                if (myComboBox.get_Text().Equals("Next")) {
                    node.get_TreeView().set_SelectedNode(node.get_NextNode());
                }
                else {
                    if (myComboBox.get_Text().Equals("NextVisible")) {
                        node.get_TreeView().set_SelectedNode(
                            node.get_NextVisibleNode());
                    }
                    else {
                        if (myComboBox.get_Text().Equals("First")) {
                            node.get_TreeView().set_SelectedNode(
                                node.get_FirstNode());
                        }
                        else {
                            if (myComboBox.get_Text().Equals("Last")) {
                                node.get_TreeView().set_SelectedNode(
                                    node.get_LastNode());
                            }
                        }
                    }
                }
            }
        }
    }
    node.get_TreeView().Focus();
} //SelectNode

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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