How Can I Successfully Inject JavaScript into a WebBrowser Control?

Injecting Javascript into WebBrowser Control

When attempting to inject a script into a WebBrowser control, developers sometimes encounter issues with unsupported properties. To address this, one can leverage the IHTMLScriptElement interface.

Revised Approach:

The following code snippet provides a solution that has been proven 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");

Understanding the Interface:

The IHTMLScriptElement interface allows you to access the text property of a script element and execute the script.

Explanation:

This modified approach leverages the IHTMLScriptElement interface to manipulate the script element and execute it within the browser control. The error associated with unsupported properties is bypassed by using the correct interface for the task.

The above is the detailed content of How Can I Successfully Inject JavaScript into a WebBrowser Control?. For more information, please follow other related articles on the PHP Chinese website!