Asp.net 2.0 Treeview 無限級無刷新示例

2024-07-10 13:06:40

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<%@ 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">

    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>