一个非常有用的webpart--文档列表添加文件夹树

代码很简单：

//test code by jianyi0115@163.com
// 2008-11-19
//
//
using System;
using System.Collections;
using System.Text;
using sharepoint = Microsoft.SharePoint.WebControls ;
using wss = Microsoft.SharePoint.WebPartPages;
using System.Web.UI.WebControls  ;
using System.Web.UI;
using System.Web.UI.Design;
using System.Runtime.InteropServices;
using System.Web.UI.WebControls.WebParts;
using System.Drawing;
using System.ComponentModel;
using Microsoft.SharePoint;
using Microsoft.SharePoint.WebControls;

namespace ThinkingSoft
{
    [Guid("D55A1423-B38E-4c2e-9303-C234D7B7453E")]
    public class TreeListViewWebPart : wss.WebPart                
    {
        private string _ListUrl = "http://jyserver:9000/000/Forms/AllItems.aspx" ;
        [WebBrowsable]
        [PersonalizableAttribute]
        [DisplayName("列表Url")]
        public string ListUrl
        {
            get { return _ListUrl; }
            set { _ListUrl = value; }
        }
        
        protected override void CreateChildControls()
        {
            base.CreateChildControls();
            try
            {
                SPList list = SPContext.Current.Web.GetList(_ListUrl);

                SPView view = list.DefaultView;

                SPFolder f = list.RootFolder;

                TreeView tree = new TreeView();
                tree.ShowLines = true;

                string viewUrl = Page.Request.RawUrl;

                if (viewUrl.IndexOf("?") != -1)
                    viewUrl = viewUrl.Split('?')[0];

                viewUrl += "?RootFolder=";

                string currentUrl = Page.Request.QueryString["RootFolder"];

                this.buildSub(viewUrl, f, tree.Nodes);

                addHtml("<table width='100%' border='1'><tr><td width='20%' valign='top'>");

                this.Controls.Add(tree);

                addHtml("</td><td  valign='top'>");
                this.Controls.Add(new LiteralControl(view.RenderAsHtml()));
                addHtml("</td></table>");
            }
            catch (Exception ex)
            {
                addHtml(ex.Message);                
            }

        }
        void addHtml( string html )
        {
            this.Controls.Add(new LiteralControl(html));
        } 
        //创建文件夹树
        void buildSub( string viewUrl , SPFolder root , TreeNodeCollection nodes )
        {
            foreach (SPFolder f in root.SubFolders)
            {
                if (f.Name.ToLower() == "forms") continue;

                TreeNode n = new TreeNode();
                n.Text = f.Name;
                n.NavigateUrl = viewUrl + f.Url;

                nodes.Add(n);

                buildSub( viewUrl , f , n.ChildNodes );
            }
        }       
    }
}