How can i attach automatic image/s to a web page using webbrowser control ?

See more:

C#

.NET

I'm navigating using the webbrowser in the end i'm getting to webbrowser4 document completed event.

At this point i have in the webbrowser already the page to add a message. I also can give the message a title.

Now i want to add to this message attached image/s. The problem is how to attach the images.

void webBrowser4_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {

            if (e.Url.AbsoluteUri != webBrowser4.Url.AbsoluteUri)
            {
                return;
            }

            HtmlElementCollection items = webBrowser4.Document.GetElementsByTagName("div");
            foreach (HtmlElement item in items)
            {
                if (item.GetAttribute("className") == "elements")
                {
                    webBrowser4.Document.GetElementById("ctl00_RightMainContent_txt_subject").InnerText = "Hello world";
                }
            }

            HtmlElementCollection classButton = webBrowser4.Document.All;
            foreach (HtmlElement element in classButton)
            {
                if (element.GetAttribute("className") == "addImg")
                {
                    element.InvokeMember("click");
                }
            }

            // uplFileDrgDrp
            HtmlElementCollection classButton1 = webBrowser4.Document.All;
            foreach (HtmlElement element in classButton1)
            {
                if (element.GetAttribute("className") == "uplFileDrgDrp")
                {
                    element.InvokeMember("click");
                }
            }
         }

First i'm adding a title to the message Hello World

Then i click on the button addImg

The last part should attach now the images. After i click addImg i can click on another button and browse to images i want to attach from my hard disk or i can drag and drop images to this addImg window. In any case i want to add this images without browsing or even without drag and drop them but i can't figure out how.

This is a screenshot of the website after clicked to add a new message:

screenshot[^]

My question is how can i attach the images i want automatic. Let's say i'm GetFiles and i have array of images and now i want to attach them to the message.

This is the whole add message page view-source link

When the window to drag and drop images is opened and i'm doing inspect element i see:


[^]

Maybe somehow to make that it will drag and drop automatic the images files from array of images. Not sure how to do it at all.

What I have tried:

What i tried is mentioned in the question you can see it here more clear here:

https://social.msdn.microsoft.com/Forums/vstudio/en-US/cc81eaf5-8f6b-479e-85c8-9cadd259ee3d/how-can-i-attach-automatic-images-to-container-in-a-web-page-using-webbrowser-control-?forum=csharpgeneral