我在C#中遇到BHO问题,Javascript没有在iframe中注入.
How to get access of <iframe> body using c++/ATL/COM?
问题类似,但在上面使用com.我想用C#.
解决方法
我已经创建了一个IE扩展/插件/插件来在页面上注入我的自定义JavaScript以及在文档上注入IFrame附件
所以我在c#中创建了BHO.在文档完成事件中
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 //
}
}
}
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