PlayWright.Net定位無ID和Name的iframe框架

private async Task DumpFrameTree(IFrame frame, string indent)
    {        
        foreach (var child in frame.ChildFrames)
        {
            await DumpFrameTree(child, indent + " ");
            if (child.Url.Contains("/page/card/cardpreview"))
            {
//定位框架iframe中的元素,
                var l = child.Locator("#DJBH");
                if (l != null)
                {
                    //BindData(await l.InputValueAsync()

　　　　　　　　); }
　　　　 break; } 
　　} 
}
 private async void btn_Click(object sender, EventArgs e) { 
await DumpFrameTree(page.MainFrame, string.Empty);
 }