Asp.net 2.0 Treeview无限级无刷新示例

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Asp.net 2.0 Treeview无限级无刷新示例

作者:佚名时间:2007-09-04 15:26 出处:yesky 责编:月夜寒箫

摘要：Asp.net 2.0 Treeview无限级无刷新示例

            <%@ 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>

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