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Asp.net 2.0 Treeview 无限级无刷新示例

 2007-01-11 17:21:12 来源:WEB开发网   
核心提示:<%@ Page Language="C#" %><%@ Import Namespace="System.IO" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "

<%@ Page Language="C#" %>
<%@ Import Namespace="System.IO" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

<script runat="server">

   void Treeview1_TreeNodePopulate(object sender, TreeNodeEventArgs e)
   {
    if (IsCallback)
       if (e.Node.ChildNodes.Count == 0)
       {
         LoadChildNode(e.Node);
       }
   
   }

   PRivate void LoadChildNode(TreeNode node)
   {
    
     DirectoryInfo directory;
     directory = new DirectoryInfo(node.Value);   

   foreach (DirectoryInfo sub in directory.GetDirectories())
     {
    
       TreeNode subNode = new TreeNode(sub.Name);
       subNode.Value = sub.FullName;

     try
       {
         if (sub.GetDirectories().Length > 0 || sub.GetFiles().Length > 0)
         {
           subNode.SelectAction = TreeNodeSelectAction.SelectExpand;
           subNode.PopulateOnDemand = true;
           subNode.NavigateUrl = "#";
         }
      }
       catch { subNode.ImageUrl = "WebResource.axd?a=s&r=TreeView_XP_Explorer_ParentNode.gif&t=632242003305625000"; }
       node.ChildNodes.Add(subNode);
      
     }

   foreach (FileInfo fi in directory.GetFiles())
     {
       TreeNode subNode = new TreeNode(fi.Name);
       node.ChildNodes.Add(subNode);
     }
   }
  
  
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
   <title>Untitled Page</title>
</head>

<body bgcolor="white">
   <form id="form1" runat="server">
   <div>
   <asp:treeview ID="Treeview1" runat="server" ImageSet="XPFileExplorer" AutoGenerateDataBindings="false" ExpandDepth=0
     OnTreeNodePopulate="Treeview1_TreeNodePopulate"
   >
     <SelectedNodeStyle BackColor="#B5B5B5"></SelectedNodeStyle>
     <Nodes>
       <asp:TreeNode Value="C:" Text="C:" PopulateOnDemand="true" SelectAction="Select" NavigateUrl="#" >
       </asp:TreeNode>
     </Nodes>
     <NodeStyle VerticalPadding="2" Font-Names="Tahoma" Font-Size="8pt" HorizontalPadding="2"
       ForeColor="Black"></NodeStyle>
     <HoverNodeStyle Font-Underline="True" ForeColor="#6666AA"></HoverNodeStyle>
   </asp:treeview>
   </div>
   </form>
</body>
</html>

Tags:Asp net Treeview

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