CODEWITHSUNDEEP
menubrowsercontextmenu
Anderson Imes
Anderson Imes

Reputation: 25650

Allow only Copy/Paste Context Menu in System.Windows.Forms.WebBrowser Control

The WebBrowser control has a property called "IsWebBrowserContextMenuEnabled" that disables all ability to right-click on a web page and see a context menu. This is very close to what I want (I don't want anyone to be able to right-click and print, hit back, hit properties, view source, etc).

The only problem is this also disables the context menu that appears in TextBoxes for copy/paste, etc.

To make this clearer, this is what I don't want:
badcontext

This is what I do want:
goodcontext

I would like to disable the main context menu, but allow the one that appears in TextBoxes. Anyone know how I would do that? The WebBrowser.Document.ContextMenuShowing event looks promising, but doesn't seem to properly identify the element the user is right-clicking on, either through the HtmlElementEventArgs parameter's "FromElement" and "ToElement" properties, nor is the sender anything but the HtmlDocument element.

Thanks in advance!

Upvotes: 1

Views: 6551

Answers (4)

Treb
Treb

Reputation: 20299

A quick look at the MSDN documentation shows that none of the mouse events (click, button down/up etc) are supported to be used in your program. I'm afraid its either or: Either disable conetxt menus, or allow them.

If you disable them, the user can still copy & paste using keyboard shortcuts (Ctrl-C, Ctrl-V). Maybe that gives you the functionality you need.

Upvotes: 0

Santosh Thakur
Santosh Thakur

Reputation: 1

//Start:

function cutomizedcontextmenu(e)
{
    var target = window.event ? window.event.srcElement : e ? e.target : null;
    if( navigator.userAgent.toLowerCase().indexOf("msie") != -1 )
    {
        if (target.type != "text" && target.type != "textarea" && target.type != "password") 
        {
            alert(message);
            return false;
        }
    return true;
    }
    else if( navigator.product == "Gecko" )
    {
        alert(message);
        return false;
    }
} 

document.oncontextmenu = cutomizedcontextmenu;
//End:

I hope this will help you Anderson Imes

Upvotes: 0

Anderson Imes
Anderson Imes

Reputation: 25650

We ended up using a combination of both of the above comments. Closer to the second, which is why I gave him credit.

There is a way to replace the context menu on both the client-side web code as well as through winforms, which is the approach we took. I really didn't want to rewrite the context menu, but this seems to have given us the right mix of control.

Upvotes: -1

user19302
user19302

Reputation:

have you considered writing your own context menu in javascript? Just listen to the user right clicking on the body, then show your menu with copy and paste commands (hint: element.style.display = "block|none"). To copy, execute the following code:

   CopiedTxt = document.selection.createRange();
   CopiedTxt.execCommand("Copy");

And to paste:

   CopiedTxt = document.selection.createRange();
   CopiedTxt.execCommand("Paste");

Source:

http://www.geekpedia.com/tutorial126_Clipboard-cut-copy-and-paste-with-JavaScript.html

NOTE: This only works in IE (which is fine for your application).

I know its not bulletproof by any means, but here is a code sample that should get you started:

<html>
    <head>
        <script type = "text/javascript">
            var lastForm = null;
            window.onload = function(){

                var menu = document.getElementById("ContextMenu");
                var cpy = document.getElementById("CopyBtn");
                var pst = document.getElementById("PasteBtn");

                document.body.onmouseup = function(){
                    if (event.button == 2)
                    {
                        menu.style.left = event.clientX + "px";
                        menu.style.top = event.clientY + "px";
                        menu.style.display = "block";

                        return true;
                    }

                    menu.style.display = "none";
                };

                cpy.onclick = function(){
                    copy = document.selection.createRange();
                    copy.execCommand("Copy");
                    return false;
                };

                pst.onclick = function(){
                    if (lastForm)
                    {
                        copy = lastForm.createTextRange();
                        copy.execCommand("Paste");
                    }
                    return false;
                };
            };
        </script>
    </head>

    <body oncontextmenu = "return false;">
        <div id = "ContextMenu" style = "display : none; background: #fff; border: 1px solid #aaa; position: absolute;
            width : 75px;">
            <a href = "#" id = "CopyBtn" style = "display: block; color : blue; text-decoration: none;">Copy</a>
            <a href = "#" id = "PasteBtn" style = "display: block; color : blue; text-decoration: none;">Paste</a>
        </div>
        sadgjghdskjghksghkds
        <input type = "text" onfocus = "lastForm = this;" />
    </body>
</html>

Upvotes: 1

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