I am facing issue with BHO in C# ,Javascript not inject in iframe .
How to get access of body using c++/ATL/COM? question is similar like but in this <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-5408099190056760" data-ad-slot="7305827575" data-ad-format="auto" data-full-width-responsive="true"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> </div> <div class="relativetags"> 相关标签: </div> </div> <div class="fly-panel detail-box" id="flyReply"> <fieldset class="layui-elem-field layui-field-title" style="text-align: center;"> <legend>1条回答</legend> </fieldset> <ul class="jieda" id="jieda"> <li data-id="111"> <a name="item-1111111111"></a> <div class="detail-about detail-about-reply"> <a class="fly-avatar" href="https://www.e-learn.cn/qa/u-92.html"> <img src="https://www.e-learn.cn/qa/data/avatar/000/00/00/small_000000092.jpg" alt=" "> </a> <div class="fly-detail-user"> <a href="https://www.e-learn.cn/qa/u-92.html" class="fly-link"> <cite>遥遥无期 </cite> </a> </div> <div class="detail-hits"> <span>2020-12-20 10:51</span> </div> </div> <div class="detail-body jieda-body photos"> <p>I have created a IE extension/Plugin/Addon To inject my Custom JavaScript on page as well as on IFrame attache with the document</p> <p>So I created BHO in c# . in Document complete Event</p> <pre><code> private void webBrowser_DocumentComplete(object pDisp, ref object URL) { // this is main docuemnt document = (HTMLDocument)webBrowser.Document; //------------------------------------------------------------------------------------- IHTMLElementCollection elcol = document.getElementsByTagName("iframe"); foreach (IHTMLElement _htmlElement in elcol) { try { //This line is for specific iframe on body //string fUrl = ((mshtml.HTMLIFrameClass)_htmlElement).IHTMLFrameBase_src; //if (fUrl.Contains("/v1/api/login?isIframe=true")) //{ // in this casting HtmlElement HTMLFrameElement HTMLFrameElement frmelement = (HTMLFrameElement)_htmlElement; //from HTMLFrameElement Casting as a WebBrowser2 because it will give us body of i frame and works a document . DispHTMLDocument doc2 = (DispHTMLDocument)((SHDocVw.IWebBrowser2)frmelement).Document; //no Doc2 is documnt without access denied .. do what ever you want to do //Here i am checking wheather document having body or not if (doc2.body != null) { //Here i am checking Already injected or not if not then inject my javascript here if (doc2.getElementById("UniqueDivVishal") == null) { IHTMLElement head = (IHTMLElement)((IHTMLElementCollection)doc2.all.tags("head")).item(null, 0); IHTMLScriptElement scriptObject = (IHTMLScriptElement)doc2.createElement("script"); scriptObject.type = @"text/javascript"; scriptObject.text = Properties.Resources.SearchHelper1; ((HTMLHeadElement)head).appendChild((IHTMLDOMNode)scriptObject); string div2 = "<div id=\"UniqueDivVishal\"></div>"; doc2.body.insertAdjacentHTML("beforeend", div2); } //execute a function from BHO which is in Iframe doc2.parentWindow.execScript("funcation(){ InitFn(); alert('Hello From Frame')}", "javascript"); } //} } catch (Exception ex) { //Handle Exception here // } } } </code></pre> <p>for further detail you can contact me : vishalroxx7@gmail.com</p> <div class="appendcontent"> </div> </div> <div class="jieda-reply"> <span class="jieda-zan button_agree" type="zan" data-id='1319254'> <i class="iconfont icon-zan"></i> <em>0</em> </span> <span type="reply" class="showpinglun" data-id="1319254"> <i class="iconfont icon-svgmoban53"></i> 讨论(0) </span> <div class="jieda-admin"> </div> </div> <div class="comments-mod " style="display: none; 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