How to inject Javascript in WebBrowser control?

Question

I\'ve tried this:

string newScript = textBox1.Text;
HtmlElement head = browserCtrl.Document.GetElementsByTagName(\"head\")[0];
HtmlElement scriptEl = browser         


        

Answer 1

For some reason Richard's solution didn't work on my end (insertAdjacentText failed with an exception). This however seems to work:

HtmlElement head = webBrowser1.Document.GetElementsByTagName("head")[0];
HtmlElement scriptEl = webBrowser1.Document.CreateElement("script");
IHTMLScriptElement element = (IHTMLScriptElement)scriptEl.DomElement;
element.text = "function sayHello() { alert('hello') }";
head.AppendChild(scriptEl);
webBrowser1.Document.InvokeScript("sayHello");

This answer explains how to get the IHTMLScriptElement interface into your project.