TreeView默认展开所有节点

在FormLoad里面写如下代码实现展开所有节点

 

        private void Form1_Load(object sender, EventArgs e)
        {
            for (int i = treeView1.GetNodeCount(false)-1; i >-1; i--)
		{
                        treeView1.SelectedNode = treeView1.Nodes[i];
                        treeView1.SelectedNode.ExpandAll();
	        }
        }

转载于:https://www.cnblogs.com/shi-bing/archive/2012/05/31/3020795.html