问题
I am facing issue with BHO in C# ,Javascript not inject in iframe .
How to get access of <iframe> body using c++/ATL/COM? question is similar like but in this above using com. i want to use C#.
回答1:
I have created a IE extension/Plugin/Addon To inject my Custom JavaScript on page as well as on IFrame attache with the document
So I created BHO in c# . in Document complete Event
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 //
}
}
}
for further detail you can contact me : vishalroxx7@gmail.com
来源:https://stackoverflow.com/questions/35651305/ie-extention-plugin-addon-javascript-injection-in-iframe-and-document-c-sharp