jQuery simple treeview 需要這樣的一段html

<ul class="filetree" id="treeFolder">
<li id="1"><span  class="folder">Root</span>
 <ul>
 <li id="2" class="closed"><span  class="folder">node1</span><ul></ul></li>
 <li id="22" class="closed"><span  class="folder">node2</span><ul></ul></li>
 <li id="23" class="closed"><span  class="folder">node3</span><ul></ul></li>
 </ul>
</li>
<li id="64"><span  class="imagebase">root2</span></li>
</ul>

放個空的<ul></ul>在這邊，是因為那個節點有子節點，但我們沒加載他，當用戶點擊展開按鈕在展開。展開的時候去服務器端取個數據自己加上去，這里就不廢話了。

先上代碼：

Code
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace aaa.bbb.ccc//自己改
{
    [DefaultProperty("Text")]
    [ToolboxData("<{0}:JavaScriptTree runat=server></{0}:JavaScriptTree>")]
    public class JavaScriptTree : WebControl
    {
        private List<JavaScriptTreeNode> _Nodes = new List<JavaScriptTreeNode>();
        public List<JavaScriptTreeNode> Nodes
        {
            set
            {
                _Nodes = value;
            }
            get
            {
                return _Nodes;
            }
        }

        private string _className;
        public string ClassName
        {
            get
            {
                return _className;
            }
            set
            {
                _className = value;
            }
        }

        protected override void CreateChildControls()
        {
            base.CreateChildControls();
            foreach (JavaScriptTreeNode item in _Nodes)
            {
                base.Controls.Add(item);
            }
        }

        public override void RenderBeginTag(HtmlTextWriter writer)
        {
            writer.WriteBeginTag("div");
            writer.WriteAttribute("class", this.ClassName);
            writer.WriteAttribute("id", "div" + this.ID);
      ;      writer.Write(HtmlTextWriter.TagRightChar);

            writer.WriteBeginTag("ul");
            writer.WriteAttribute("class", this.ClassName);
            writer.WriteAttribute("id", this.ID);
            writer.Write(HtmlTextWriter.TagRightChar);
        }

        public override void RenderEndTag(HtmlTextWriter writer)
        {
            writer.WriteEndTag("ul");
            writer.WriteEndTag("div");
        }

        protected override HtmlTextWriterTag TagKey
        {
            get
            {
                return HtmlTextWriterTag.Div;
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace aaa.bbb.ccc
{
    public class JavaScriptTreeNode : Panel
    {
        private string _id;
        public string ID
        {
            get
            {
                return _id;
            }
            set
            {
                _id = value;
            }
        }
        private string _name;
        public string Name
        {
            get
            {
                return _name;
            }
            set
            {
                _name = value;
            }
        }

        private string _className;
        public string ClassName
        {
            get
            {
                return _className;
            }
            set
            {
                _className = value;
            }
        }

        private int _childNumber;
        public int ChildNumber
        {
            get
            {
                return _childNumber;
            }
            set
            {
                _childNumber = value;
            }
        }

        private bool _isExpanded=false;
        public bool IsExpanded
        {
            get
            {
                return _isExpanded;
            }
            set
            {
                _isExpanded = value;
            }
        }

        private List<JavaScriptTreeNode> _Nodes = new List<JavaScriptTreeNode>;();

        public List<JavaScriptTreeNode> Nodes
        {
            set
            {
                _Nodes = value;
            }
            get
            {
                return _Nodes;
            }
        }

        protected override HtmlTextWriterTag TagKey
        {
            get
            {
                return HtmlTextWriterTag.Li;
            }
        }

        protected override void CreateChildControls()
        {
            base.CreateChildControls();
            foreach (JavaScriptTreeNode item in _Nodes)
            {
                base.Controls.Add(item);
            }
        }

        public override void RenderBeginTag(HtmlTextWriter writer)
        {
            writer.AddAttribute(HtmlTextWriterAttribute.Id, this.ID);
            if (!this.IsExpanded)
            {
                writer.AddAttribute(HtmlTextWriterAttribute.Class, "closed");
            }
            base.RenderBeginTag(writer);
 &nbsp;          writer.WriteBeginTag("span");

            if (!string.IsNullOrEmpty(this.ClassName))
            {
                writer.WriteAttribute("class", this.ClassName);
            }
            writer.Write(HtmlTextWriter.TagRightChar);
            writer.Write(this.Name);
            writer.WriteEndTag("span");
            if (this.ChildNumber > 0)
            {
                writer.WriteBeginTag("ul");
                writer.Write(HtmlTextWriter.TagRightChar);
            }
        }

        public override void RenderEndTag(HtmlTextWriter writer)
        {
            if (this.ChildNumber > 0)
            {
                writer.WriteEndTag("ul");
            }
            base.RenderEndTag(writer);
        }
    }
}

如何使用：

.aspx

<%@ Register Assembly="ServerControls" Namespace="aaa.bbb.ccc" TagPrefix="sc" %>
<sc:JavaScriptTree ID="treeFolder" runat="server" ClassName=&quot;filetree"  />

///

.aspx.cs

        JavaScriptTreeNode node = new JavaScriptTreeNode();
        node.ID = "123";
        node.Name = "name";
        node.ChildNumber = 345;
        node.ClassName = "folder";
        node.IsExpanded = false;
     &nbsp;  this.treeFolder.Nodes.Add(node);

         //node.Nodes.Add(node1);//自己去添加子節點
 ;       //node.Nodes.Add(node2);