摘要：
重印：http://blog.sina.com.cn/s/blog_6abcacf5010138q5.htmlprivateHashtableNodesStatus=newHashtable (); privatestringSelectNodeFullPath=字符串。空；/////////////˂/param
转载：http://blog.sina.com.cn/s/blog_6abcacf5010138q5.html
private Hashtable NodesStatus = new Hashtable(); private string SelectNodeFullPath = string.Empty; /// <summary> /// /// </summary> /// <param name="nodes"></param> private void GetTreeNodesStatus(TreeNodeCollection nodes) { foreach (TreeNode node in nodes) { if (node.IsExpanded) { NodesStatus[node.FullPath] = true; } else { NodesStatus.Remove(node.FullPath); } if (node.IsSelected) { SelectNodeFullPath = node.FullPath; } GetTreeNodesStatus(node.Nodes); } } /// <summary> /// /// </summary> /// <param name="nodes"></param> private void SetTreeNodesStatus(TreeNodeCollection nodes) { foreach (TreeNode node in nodes) { if (NodesStatus[node.FullPath] != null) { node.Expand(); } if (node.FullPath == SelectNodeFullPath) { this.tvAuthFuction.SelectedNode = node; } SetTreeNodesStatus(node.Nodes); } } }
调用：
然后在给TreeView添加Nodes的前面和后面分别添加上这两个函数，例如TreeView类的实例tv，就可以使用
GetTreeNodesStatus(tv.Nodes);
//更新TreeView函数
SetTreeNodesStatus(tv.Nodes);
这样就能实现TreeView的状态保持了