本文给出了使用Asp.net 2.0的Treeview实现无限级无刷新的示例源代码，供大家参考！
<%@ 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
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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