Asp.net 2.0 Treeview 无限级无刷新示例-技术开发专区

Asp.net 2.0 Treeview 无限级无刷新示例

作者：佚名编辑：晓徐 2007-02-05 08:46
【IT168 技术文档】
<%@ 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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