var pvf = new Pvf(pvfFilename);//初始化pvf文件，进行读取操作
        string fileContent = pvf.getPvfFileByPath("equipment/equipment.lst", Encoding.UTF8);
        pvf.dispose();//不用了就释放掉

        private void 打开ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            OpenFileDialog fileDialog = new OpenFileDialog();
            fileDialog.Multiselect = false;
            fileDialog.Title = "请选择文件";
            fileDialog.Filter = "Script.pvf文件(*.pvf)|*.pvf";
            if (fileDialog.ShowDialog() == DialogResult.OK)
            {
                pvfFilename = fileDialog.FileName;
                Thread th = new Thread(loadPvfThread);
                th.Start();
                //pvf.getPvfFileByPath("equipment/equipment.lst", Encoding.UTF8);
            }
        }
        private void loadPvfThread()
        {
            pvf = new Pvf(pvfFilename);//正常使用只需要这一个就行了，关闭窗体的时候记得dispose()
            TreeNode root = new TreeNode();
            foreach (string dom in pvf.headerTreeCache.Keys)
                dfsCreateNode(pvf.headerTreeCache[dom], ref root, dom.Split('/'), 0);
            sortNodes(ref root);
            Invoke(new EventHandler(delegate (object o, EventArgs e)
            {
                foreach (TreeNode node in root.Nodes)
                    treeView1.Nodes.Add(node);
            }));
        }
        private void dfsCreateNode(HeaderTreeNode tag,ref TreeNode tree,string[] a,int deep)
        {
            if (a.Length - 1 == deep)//到文件了
            {
                TreeNode item = new TreeNode();
                item.Tag = tag;
                item.Name = a[deep];
                item.Text = a[deep];
                item.ImageKey = "file";
                tree.Nodes.Add(item);
                return;
            }
            if (!tree.Nodes.ContainsKey(a[deep])) {
                tree.Nodes.Add(a[deep], a[deep]);
            }
            var item1 = tree.Nodes[a[deep]];
            dfsCreateNode(tag, ref item1, a, deep + 1);
        }
        private void sortNodes(ref TreeNode node)
        {
            if (node.Tag == null) //对文件夹进行排序
            {
                List<TreeNode> al = new List<TreeNode>();
                foreach (TreeNode tn in node.Nodes)
                    al.Add(tn);
                al.Sort(new Comparison<TreeNode>(delegate (TreeNode tx, TreeNode ty)
                {
                    if (tx.Tag == null && ty.Tag != null)
                        return -1;
                    else if (tx.Tag != null && ty.Tag == null)
                        return 1;
                    else
                        return string.Compare(tx.Text, ty.Text);
                }));
                node.Nodes.Clear();
                for (int i = 0; i < al.Count; i++)
                {
                    TreeNode tn = al[i];
                    sortNodes(ref tn);
                    node.Nodes.Add(tn);
                }
            }
        }