Winform webbrowser 隐藏 html 元素

目的：用webbrowser打开网页，并隐藏网页上某个html元素

1.如果已知元素ID，比较好办

直接使用webbrowser1.Document.getElementById("id")获取元素，并修改属性

HTMLDocument thedocument = WebBrowser.document.all; 
HTMLElement theelement = thedocument.getElementById(""); //这里找你要藏的东西的ID； 
theelement.setAttribute("visible",false); 
或者
HtmlElement htm = webBrowser1.Document.GetElementById("控件ID"); 
htm.OuterHtml = ""; 

2.未知元素ID，根据Name获得元素，然后筛选出所需元素隐藏

HtmlElementCollection opts = webBrowser1.Document.GetElementsByTagName("table");
            if (opts.Count > 0)
            {
                foreach (HtmlElement ele in opts)
                {                 
                    if (ele.GetAttribute("class") == "a3")
                    {
                        //opts[0].InnerHtml = ""; /*低版本IE不适用*/
                        opts[0].Style = "display:none";
                    }
                }
             
            }

 3.隐藏子元素

  HtmlElement ele = webBrowser1.Document.GetElementById("List");
                    HtmlElementCollection List= ele.Children[0].Children;
                    if (List.Count > 0)
                    {
                        foreach (HtmlElement b in List)
                        {
                            if (b.Children[1].GetAttribute("value") == "xxx")
                            {
                                b.Style = "display:none";            
                            }
                        }
                    }