[原创]如何控制TreeView在打开的时候只展开两层?

树的Html代码如下:

 1<iewc:TreeView id="TreeView1" style="Z-INDEX: 101; LEFT: 320px; POSITION: absolute; TOP: 160px"
 2                runat="server">
 3                <iewc:TreeNode Text="Node0">
 4                    <iewc:TreeNode Text="Node3">
 5                        <iewc:TreeNode Text="Node9">
 6                            <iewc:TreeNode Text="Node0"></iewc:TreeNode>
 7                            <iewc:TreeNode Text="Node1"></iewc:TreeNode>
 8                        </iewc:TreeNode>
 9                        <iewc:TreeNode Text="Node10">
10                            <iewc:TreeNode Text="Node2"></iewc:TreeNode>
11                            <iewc:TreeNode Text="Node3"></iewc:TreeNode>
12                        </iewc:TreeNode>
13                    </iewc:TreeNode>
14                    <iewc:TreeNode Text="Node4"></iewc:TreeNode>
15                </iewc:TreeNode>
16                <iewc:TreeNode Text="Node1">
17                    <iewc:TreeNode Text="Node5">
18                        <iewc:TreeNode Text="Node11">
19                            <iewc:TreeNode Text="Node4"></iewc:TreeNode>
20                            <iewc:TreeNode Text="Node5"></iewc:TreeNode>
21                        </iewc:TreeNode>
22                        <iewc:TreeNode Text="Node12"></iewc:TreeNode>
23                    </iewc:TreeNode>
24                    <iewc:TreeNode Text="Node6"></iewc:TreeNode>
25                </iewc:TreeNode>
26                <iewc:TreeNode Text="Node2">
27                    <iewc:TreeNode Text="Node7">
28                        <iewc:TreeNode Text="Node13">
29                            <iewc:TreeNode Text="Node6"></iewc:TreeNode>
30                            <iewc:TreeNode Text="Node7"></iewc:TreeNode>
31                        </iewc:TreeNode>
32                        <iewc:TreeNode Text="Node14"></iewc:TreeNode>
33                    </iewc:TreeNode>
34                    <iewc:TreeNode Text="Node8"></iewc:TreeNode>
35                </iewc:TreeNode>
36            </iewc:TreeView>

别忘了在窗体的onload事件中调用ExpandOneTwo()函数

<body MS_POSITIONING="GridLayout" onload="ExpandOneTwo();">


第1种非递归的方法:

 1 function ExpandOneTwo()
 2         {
 3        
 4            var NodeArray=new Array();
 5            NodeArray=TreeView1.getChildren();
 6            for(i=0;i<NodeArray.length;i++)
 7            {
 8                cNode=NodeArray[i];
 9                cNode.setAttribute("expanded","true");
10                //alert(cNode.getAttribute("Text"));
11                var cNodeArray=new Array();
12                cNodeArray=cNode.getChildren();
13                for(j=0;j<cNodeArray.length;j++)
14                {
15                 var ccNode=cNodeArray[j];
16                  ccNode.setAttribute("expanded","true");
17                }
18            }
19         }
20

第2种递归的方法:
 1<script language="javascript">
 2        
 3         function ExpandOneTwo()
 4         {
 5         //alert(arguments[0]);
 6            
 7            var c=arguments[0];
 8            var NodeArray=new Array();
 9            if (c==null)
10            {
11                NodeArray=TreeView1.getChildren();
12                
13                if (NodeArray!=null)    
14                for(var i=0;i<NodeArray.length;i++)
15                {    
16                    cNode=NodeArray[i];
17                    cNode.setAttribute("expanded","true");
18                    if ((cNode.getParent()!=null&& (cNode.getParent().getParent()==null))
19                    return;
20                    ExpandOneTwo(cNode);      
21                }
22            }
23            else
24            {
25               
26                NodeArray=c.getChildren();
27                if (NodeArray!=null)    
28                for(var i=0;i<NodeArray.length;i++)
29                {    
30                    cNode=NodeArray[i];
31                    cNode.setAttribute("expanded","true");
32                    if ((cNode.getParent()!=null&& (cNode.getParent().getParent()==null))
33                    return;
34                    ExpandOneTwo(cNode);      
35                }
36            }
37            
38            
39         }
40        </script>

posted @ 2005-06-07 13:40  PointNet  阅读(1693)  评论(0编辑  收藏  举报