如何在treeview控件中添加面板节点？ [英] How to add panel node in treeview control ?

问题描述

具有面板节点的树视图控件

A treeview control with panel nodes

推荐答案

TreeView没有Scroll事件。它无论如何都不可靠，因为节点可以展开和折叠，从而改变节点的位置和可见性。另一种方法是使用如下定时器：

TreeView doesn't have a Scroll event. It isn't reliable anyway since nodes can be expanded and collapsed, changing the position and visibility of the node. Alternative is to use timer as below:

private void timer1_Tick(object sender, EventArgs e) {
    var node = treeView1.SelectedNode;
    if (node == null || !node.IsVisible) panel1.Visible = false;
    else {
        panel1.Visible = true;
        var nodepos = treeView1.PointToScreen(node.Bounds.Location);
        var panelpos = panel1.Parent.PointToClient(nodepos);
        panel1.Top = panelpos.Y;
    }
}

它可以很好地澄清你的要求。

It works well to clarify your requirement.

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