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动态menu导航条以及treeview树

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12/02
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1.menu表数据



2.在后台生成html内容后，前台利用nav-h.css生成menu导航条，利用Jquery的treeview插件生成menu树

前台coding: 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

   <link href="Scripts/jquery.treeview.css" rel="stylesheet" type="text/css" />

   <script language="javascript" type="text/javascript" src="Scripts/jquery-1.8.2.js"></script>

   <script language="javascript" type="text/javascript" src="Scripts/jquery.treeview.js"></script>

   <link  href="Scripts/nav-h.css" rel="stylesheet" type="text/css" />

   <style type="text/css">

        .menu{ margin:10px 0 0px; position:absolute; right:20px; z-index:99;}

        .menu ul{ list-style:none;}

        .menu ul li{ float:left;}

        .menu ul li a{ border:1px solid #bbb; background-color:#cdcdcd; }

   </style>

</head>

<body>

<div runat="server" id="menu" class="menu"></div>

<div runat="server" id="tree" style="border: 1px solid rgb(221, 221, 221);width: 250px;margin-right: 2px;top: 5px;left: 0;"></div>

  <script type="text/javascript">

        $(document).ready(function () {

            $("#menuTree").treeview();

        });

  </script>

</body>

</html>

后台coding: 

protected void Page_Load(object sender, EventArgs e)

        {

            if (!IsPostBack)

            {

                string menuHtml = string.Empty;

                menuHtml = BuildMenuWithRoot(null, string.Empty, "Tree");

                tree.InnerHtml = menuHtml;

                menuHtml = BuildMenuWithRoot(null, string.Empty, "Menu");

                menu.InnerHtml = menuHtml;

            }

        }

        public string BuildMenuWithRoot(int? parentId, string str, string type)

        {

            IEnumerable<menu> menus = GetMenuByParentId(parentId);

            foreach (menu m in menus)

            {

                try

                {

                    str += "<li><a id=\"" + m.Id.ToString() + "\" href=\"" + m.PageUrl + "\"><span>" + m.Description + "</span></a>";

                    str += BuildMenuWithRoot(m.Id, string.Empty, type);

                    str += "</li>";

                }

                catch

                {

                }

            }

            string idstr = string.Empty;

            if (type == "Menu") idstr = " id=\"nav\"";

            else if (type == "Tree") idstr = " id=\"menuTree\"";

            if (menus.Count() > 0) str = "<ul"+idstr+ ">" + str+"</ul>";

            return str;

        }

        public IEnumerable<menu> GetMenuByParentId(int? parentId)

        {

            WorkPermitDataContext db = new WorkPermitDataContext();

            var query = from m in db.menus

                        where (parentId != null && m.ParentId == parentId) || (parentId == null && m.ParentId == null)

                        orderby m.OrderNumber

                        select m;

            return query.AsEnumerable();

        }

生成的menu树html: 

<ul id="menuTree">

  <li><a id="1" href="~/Home.aspx"><span>Home</span></a>

    <ul id="menuTree">

      <li><a id="2" href="~/Menu1.aspx"><span>Menu1</span></a>

        <ul id="menuTree">

          <li><a id="3" href="~/Menu11.aspx"><span>Menu1.1</span></a>

            <ul id="menuTree">

              <li><a id="5" href="~/Menu111.aspx"><span>Menu1.1.1</span></a></li>

              <li><a id="75" href="~/Menu112.aspx"><span>Menu1.1.2</span></a></li>

            </ul>

          </li>

          <li><a id="4" href="~/Menu12.aspx"><span>Menu1.2</span></a></li>

          <li><a id="9" href="~/Menu13.aspx"><span>Menu1.3</span></a>

            <ul id="menuTree">

              <li><a id="10" href="~/Menu131"><span>Menu1.3.1</span></a></li>

            </ul>

          </li>

          <li><a id="12" href="~/Menu14.aspx"><span>Menu1.4</span></a></li>

        </ul>

      </li>

      <li><a id="76" href="~/Menu2.aspx"><span>Menu2</span></a></li>

      <li><a id="78" href="~/Menu3.aspx"><span>Menu3</span></a></li>

    </ul>

  </li>

</ul>

menu树的浏览器效果:

生成的menu导航条html: 

<ul id="nav">

  <li><a id="1" href="~/Home.aspx"><span>Home</span></a>

    <ul id="nav">

      <li><a id="2" href="~/Menu1.aspx"><span>Menu1</span></a>

        <ul id="nav">

          <li><a id="3" href="~/Menu11.aspx"><span>Menu1.1</span></a>

            <ul id="nav">

              <li><a id="5" href="~/Menu111.aspx"><span>Menu1.1.1</span></a></li>

              <li><a id="75" href="~/Menu112.aspx"><span>Menu1.1.2</span></a></li>

            </ul>

          </li>

          <li><a id="4" href="~/Menu12.aspx"><span>Menu1.2</span></a></li>

          <li><a id="9" href="~/Menu13.aspx"><span>Menu1.3</span></a>

            <ul id="nav">

              <li><a id="10" href="~/Menu131"><span>Menu1.3.1</span></a></li>

            </ul>

          </li>

          <li><a id="12" href="~/Menu14.aspx"><span>Menu1.4</span></a></li>

        </ul>

      </li>

      <li><a id="76" href="~/Menu2.aspx"><span>Menu2</span></a></li>

      <li><a id="78" href="~/Menu3.aspx"><span>Menu3</span></a></li>

    </ul>

  </li>

</ul>

menu导航的浏览器效果:

3.从上面可以看出,由于其它所有menu都是由root根节点生成，所以显示的树状结构并不符合我们的使用习惯，加以改进



后台coding: 

public string BuildMenu(int? parentId, string str, string type)

        {

            IEnumerable<menu> menus = GetMenuByParentId(parentId);

            foreach (menu m in menus)

            {

                try

                {

                    if (parentId != null) str += "<li><a id=\"" + m.Id.ToString() + "\" href=\"" + m.PageUrl + "\"><span>" + m.Description + "</span></a>";

                    str += BuildMenu(m.Id, string.Empty, type);

                    if (parentId != null) str += "</li>";

                }

                catch

                {

                }

            }

            string idstr = string.Empty;

            if (menus.Count() > 0)

            {

                if (parentId == null)

                {

                    if (type == "Menu") idstr = "<ul id=\"nav\">";

                    if (type == "Tree") idstr = "<ul id=\"menuTree\">";

                    str = idstr + "<li><a href=\"~/Home.aspx\"><span>Home</span></a></li>" + str.Substring(4, str.Length - 9) + "</ul>";

                }

                else str = "<ul>" + str + "</ul>";

            }

            return str;

        }

生成的menu树html 

<ul id="menuTree">

  <li><a href="~/Home.aspx"><span>Home</span></a></li>

  <li><a id="2" href="~/Menu1.aspx"><span>Menu1</span></a>

    <ul>

      <li><a id="3" href="~/Menu11.aspx"><span>Menu1.1</span></a>

        <ul>

          <li><a id="5" href="~/Menu111.aspx"><span>Menu1.1.1</span></a></li>

          <li><a id="75" href="~/Menu112.aspx"><span>Menu1.1.2</span></a></li>

        </ul>

      </li>

      <li><a id="4" href="~/Menu12.aspx"><span>Menu1.2</span></a></li>

      <li><a id="9" href="~/Menu13.aspx"><span>Menu1.3</span></a>

        <ul>

          <li><a id="10" href="~/Menu131"><span>Menu1.3.1</span></a></li>

        </ul>

      </li>

      <li><a id="12" href="~/Menu14.aspx"><span>Menu1.4</span></a></li>

    </ul>

  </li>

  <li><a id="76" href="~/Menu2.aspx"><span>Menu2</span></a></li>

  <li><a id="78" href="~/Menu3.aspx"><span>Menu3</span></a></li>

</ul>

menu树浏览器效果

生成的menu导航条html 

<ul id="nav">

  <li><a href="~/Home.aspx"><span>Home</span></a></li>

  <li><a id="2" href="~/Menu1.aspx"><span>Menu1</span></a>

    <ul>

      <li><a id="3" href="~/Menu11.aspx"><span>Menu1.1</span></a>

        <ul>

          <li><a id="5" href="~/Menu111.aspx"><span>Menu1.1.1</span></a></li>

          <li><a id="75" href="~/Menu112.aspx"><span>Menu1.1.2</span></a></li>

        </ul>

      </li>

      <li><a id="4" href="~/Menu12.aspx"><span>Menu1.2</span></a></li>

      <li><a id="9" href="~/Menu13.aspx"><span>Menu1.3</span></a>

        <ul>

          <li><a id="10" href="~/Menu131"><span>Menu1.3.1</span></a></li>

        </ul>

      </li>

      <li><a id="12" href="~/Menu14.aspx"><span>Menu1.4</span></a></li>

    </ul>

  </li>

  <li><a id="76" href="~/Menu2.aspx"><span>Menu2</span></a></li>

  <li><a id="78" href="~/Menu3.aspx"><span>Menu3</span></a></li>

</ul>

menu导航条浏览器效果

4.使用到的treeview插件可从官网下载

http://jquery.bassistance.de/treeview/demo/



nav-h.css内容如下 

li:hover ul, li.over ul{ display:block;}

ul#nav {

	position: relative;

	}

ul#nav ul {

	position: absolute; display: none; TOP: 100%; right: 0px;

}

ul#nav ul ul {

	TOP: 0px; right: 100%

}

ul#nav ul ul ul {

	TOP: 0px; right: 100%

}

ul#nav LI {

	position: relative; display: inline; FLOAT: left;

}

ul#nav ul LI {

	 display: block;width:250px

}

ul#nav A {

	 display: block;  background: #ddd; FLOAT: left; HEIGHT: 1%; COLOR: #666; BORDER-TOP: #fff 1px solid; BORDER-RIGHT: #fff 1px solid; TEXT-DECORATION: none; padding:3px 20px

}

ul#nav A:hover {

	background: #bbb; COLOR: #fff

}

ul#nav LI:hover A {

	background: #bbb; COLOR: #fff;

}

ul#nav LI:hover LI A {

	background: #bbb; FLOAT: none ;padding:3px 6px;

}

ul#nav LI:hover LI A:hover {

	background: #999

}

ul#nav LI:hover LI:hover A {

	background: #999

}

ul#nav LI:hover LI:hover LI A {

	background: #999

}

ul#nav LI:hover LI:hover LI A:hover {

	background: #666

}

ul#nav LI:hover LI:hover LI:hover A {

	background: #666

}

ul#nav LI:hover LI:hover LI:hover LI A {

	background: #666

}

ul#nav LI:hover LI:hover LI:hover LI A:hover {

	background: #333

}

ul#nav LI:hover ul ul {

	display: none

}

ul#nav LI:hover ul ul ul {

	display: none

}

ul#nav LI:hover ul {

	display: block

}

ul#nav ul LI:hover ul {

	display: block

}

ul#nav ul ul LI:hover ul {

	display: block

}

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