HTML:

 1    <style type="text/css">
 2        body{font-size:9pt;}
 3        a{margin-top:1px;width:100px;float:left;clear:both;cursor:hand;border:1px solid gray;margin-left:5px;color:black;text-decoration:none;padding-left:3px;}
 4        b{margin-top:1px;width:100px;float:left;clear:both;cursor:pointer;border:1px solid gray;padding-left:3px;}
 5    </style>
 6
 7<%=treeHtml %>
 8<script type="text/javascript">
 9    var B_tag=document.getElementsByTagName("B");
10    for(var i=0;i<B_tag.length;i++)
11    {
12        B_tag[i].onclick=function (){
13            change(event.srcElement);
14        }
15    }
16    
17    var A_tag=document.getElementsByTagName("A");
18    for(var i=0;i<A_tag.length;i++)
19    {
20        A_tag[i].href="";
21        A_tag[i].target="";    
22        A_tag[i].style.display="none"   ;
23    }
24    function change(obj)
25    {        
26        
27        var myObj=obj.nextSibling;        
28        while(myObj.tagName!="B" && myObj.tagName!="SCRIPT")
29        {       
30            if(myObj.tagName=="A")
31            {                  
32                myObj.style.display=(myObj.style.display=="none" || myObj.style.display=="")?"block":"none";
33            }
34            myObj=myObj.nextSibling;
35        }
36    }
37</script>

C#:

        SqlConnection conn = new SqlConnection(@"server=192.168.1.102;uid=sa;pwd=123;database=test;");//

        protected string treeHtml = string.Empty;

        protected void Page_Load(object sender, EventArgs e)
        {
            CreateDivTree();
        }

        protected void CreateDivTree()
        {
            List<string> leftNames = new List<string>();

            string sql = "select [name] from [sysObjects] where [xtype] = 'p' order by [name]";

            DataTable dt = SqlHelper.ExecuteDataset(conn,CommandType.Text,sql).Tables[0];

            int rowCount = dt.Rows.Count;

            if (rowCount > 0)
            {
                string leftName=string.Empty;

                string name=string.Empty;

                string nameUpper = string.Empty;

                foreach (DataRow row in dt.Rows)
                {
                    name = row["name"].ToString();

                    nameUpper = name.ToUpper();

                    if (name.IndexOf("_") > 0)
                    {
                        leftName = nameUpper.Substring(0, nameUpper.IndexOf("_"));
                    }
                    else
                    {
                        leftName = nameUpper.Substring(0, 1);
                    }

                    if (leftName == "DT" || leftName == "SP")
                    {
                        continue;
                    }

                    if (!leftNames.Contains(leftName))
                    {
                        leftNames.Add(leftName);
                        treeHtml += string.Format("<B>{0}</B>", leftName);
                        treeHtml += string.Format("<A>{0}</A>", name);
                    }
                    else
                    {
                        treeHtml += string.Format("<A>{0}</A>", name);
                    }
                }
            }

        }

以前也做过类似的程序,但代码较多,加载速度较慢.

这次进行了优化,代码很少,速度很快.