TreeView使用集锦

    技术2022-05-11  31

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    原来在论坛里发过专题帖子,只是由于帖子丢失原因,有些问题找不到了,同时这次也补充了一些,发到文档区以方便查询吧原贴http://expert.csdn.net/Expert/topic/1525/1525202.xml

    1.下载地址http://msdn.microsoft.com/downloads/samples/internet/ASP_DOT_NET_ServerControls/WebControls/default.asp下载后是后缀为bat的版本(1)bulid.将bulid.bat的路径指向csc.exe所在路径,生成Microsoft.Web.UI.WebControls.dll。(2)在wwwroot下创建空目录webctrl_client1_0。(3)将buildRuntime下的文件拷至webctrl_client1_0下。(4)选择工具箱的自定义工具箱,添加Microsoft.Web.UI.WebControls.dll。有些麻烦但如果你能找到后缀是msi的自动安装版本,直接下一步就行(我一直用这个版本,hoho)安装后,通过“自定义工具箱”->“.net框架组件”把TreeView添加到工具箱里

    2.运行时无法显示一般是TreeView的版本问题,最好下载英文版自动安装版本重新安装,安装前应该先到添加删除程序里卸掉原版本

    3.显示格式出错(非树状显示)TreeView要求客户端浏览器版本为IE5.5及以上,最好要求客户端升级为IE6.0

    4.框架里使用TreeView设置NavigateUrl、Target属性,可更新另外的Frame

    5.找不到TreeNode类使用TreeView,最好添加namespace:using Microsoft.Web.UI.WebControls;

    6.遍历TreeView节点(递归算法)private void Page_Load(object sender, System.EventArgs e){ GetAllNodeText(TreeView1.Nodes);}void GetAllNodeText(TreeNodeCollection tnc){ foreach(TreeNode node in tnc) {  if(node.Nodes.Count!=0)   GetAllNodeText(node.Nodes);  Response.Write(node.Text + " "); }}

    7.得到node结点的父节点TreeNode pnode;if(node.Parent is TreeNode) pnode=(TreeNode)node.Parent;else //node is root node

    8.修改TreeView样式(示例)<iewc:TreeView id="TreeView1" runat="server" HoverStyle="color:blue;background:#00ffCC;" DefaultStyle="background:red;color:yellow;" SelectedStyle="color:red;background:#00ff00;">用代码:TreeView1.DefaultStyle["font-size"] = "20pt";

    9.展开时不提交,改变选择节点时才提交将autopostback设置成false;  在body里添加  <body  οnlοad="initTree()">  然后在PageLoad里写:  string  strTreeName  =  "TreeView1";  string  strRef  =  Page.GetPostBackEventReference(TreeView1);  string  strScript  =  "<script  language="JavaScript">  "  +  "<!--  "  +  "            function  initTree()  {  "  +"                        "  +  strTreeName  +  ".onSelectedIndexChange  =  function()  {  "  +    "if  (event.oldTreeNodeIndex  !=    event.newTreeNodeIndex)  "  +  "this.queueEvent('onselectedindexchange',  event.oldTreeNodeIndex  +  ','  +  event.newTreeNodeIndex);  "  +    "window.setTimeout('"  +  strRef.Replace("'","/'")    +  "',  0,  'JavaScript');  "  +    "                        }  "  +      "            }  "  +    "//  -->  "  +  "</script>";  Page.RegisterClientScriptBlock("InitTree",strScript  );   这样就只有你点击的节点更改的时候才提交!

    10.TreeView结合XML把XML文件设置为如下格式,然后直接设置TreeNodeSrc为该XML文件就行<?xml version="1.0" encoding="GB2312"?><TREENODES> <TREENODE TEXT="node0" EXPANDED="true">  <TREENODE TEXT="node1"/>  <TREENODE TEXT="node2"/> </TREENODE> <TREENODE TEXT="node3" NavigateURL="3.aspx"/></TREENODES>或者用代码TreeView1.TreeNodeSrc="a.xml";TreeView1.DataBind();

     

    客户端控制TreeViewhttp://expert.csdn.net/Expert/topic/1382/1382892.xml

    1.设置所选节点,如选中第二个节点function SetSelNode(){ TreeView1.selectedNodeIndex="1";}

    2.得到所选节点的Text,ID或NodeDatafunction GetAttribute(){ alert(TreeView1.getTreeNode(TreeView1.selectedNodeIndex).getAttribute("Text"));}替换Text为ID或NodeData,可分别得到所选节点的ID或NodeData

    3.修改节点属性,如修改第一个节点的Textfunction ModifyNode(){ var node=TreeView1.getTreeNode("0"); node.setAttribute("Text","hgknight");}

    4.得到点击节点function TreeView1.onclick(){ alert(TreeView1.getTreeNode(TreeView1.clickedNodeIndex).getAttribute("Text"));}

    5.添加节点function AddNode(){ var node=TreeView1.createTreeNode(); node.setAttribute("Text","hgknight"); TreeView1.add(node);    }

    6.js遍历所有节点 var AllRootNode=new Array(); AllRootNode=TreeView1.getChildren(); AlertNode(AllRootNode);   

     function AlertNode(NodeArray) {  if(parseInt(NodeArray.length)==0)   return;  else  {   for(i=0;i<NodeArray.length;i++)   {    var cNode;    cNode=NodeArray[i];    alert(cNode.getAttribute("Text"));    if(parseInt(cNode.getChildren().length)!=0)     AlertNode(cNode.getChildren());       }  } }

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