How to block the images on web browser

Question

I am building a C# application with a WebBrowser and I am trying to figure out a way to block images, i.e. for them to to not display when a website is loading (so that the website loads more easily).

I've tried to remove the <img> tags by getting it via webBrowser1.DocumentText and using Regex.Replace to remove the images, but then it shows me a blank page with aaa when I'm using the code. Is there a better way to remove the images? Any help greatly appreciated.

Code:

var html_source = webBrowser1.DocumentText;
var newOne = Regex.Replace(html_source, "<img.*/>", "", RegexOptions.Multiline);
webBrowser1.DocumentText = newOne + "aaa";

Update:

I have tried below code (just for testing) but is still shows me just aaa.

var html_source = webBrowser1.DocumentText;
webBrowser1.DocumentText = html_source + "aaa";

Answer 1

EDIT

Found this question on SO and a complete project which may help you on codeproject.com. Within this example there is a userControl using the webBrowser COM component. As I wrote in my original answer I don't think it is possible to prevent the .net Framework WebBrowser to load images. You need access the level below to intercept loading images after the browser control has received the plain html text.

... The most obscure and important part of the control is the IDispatch_Invoke_Handler(). ... how to implement IDispatch::Invoke in order to restrict what IE was showing (such as images, ActiveX controls, Java). I found out that if you add a IDispatch_Invoke_Handler() method in your code with the COM dispatch identifier of -5512, this does the job for you. A very obscure answer, but it works well....

ORIGINAL

You may try this

private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
     Debug.WriteLine("documentCompleted");
     HtmlDocument doc = webBrowser1.Document;
     foreach (HtmlElement  imgElemt in doc.Images)
     {
         imgElemt.SetAttribute("src", "");
     }
}

But as MSDN says

Handle the DocumentCompleted event to receive notification when the new document finishes loading. When the DocumentCompleted event occurs, the new document is fully loaded, which means you can access its contents through the Document, DocumentText, or DocumentStream property.

I don't think you can do this with the webBrowser control from the .net Framework.