仅允许在 System.Windows.Forms.WebBrowser 控件中复制/粘贴上下文菜单

发布于 2024-07-08 07:40:09 字数 980 浏览 5 评论 0原文

WebBrowser 控件有一个名为“IsWebBrowserContextMenuEnabled”的属性，该属性禁用在网页上右键单击并查看上下文菜单的所有功能。这非常接近我想要的（我不希望任何人能够右键单击并打印、回击、点击属性、查看源代码等）。

唯一的问题是，这也会禁用文本框中出现的用于复制/粘贴等的上下文菜单。

为了使这一点更清楚，这是我不想要的：

这就是我想要的：

我想禁用主上下文菜单，但允许出现的菜单在文本框中。有人知道我会怎么做吗？ WebBrowser.Document.ContextMenuShowing 事件看起来很有希望，但似乎无法通过 HtmlElementEventArgs 参数的“FromElement”和“ToElement”属性正确识别用户右键单击的元素，发送者也不是除了 HtmlDocument 之外的任何内容元素。

提前致谢！

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汐鸠 2024-07-15 07:40:09

您是否考虑过用 JavaScript 编写自己的上下文菜单？只需听用户右键单击正文，然后使用复制和粘贴命令显示菜单（提示：element.style.display =“block|none”）。要复制，请执行以下代码：

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

并粘贴：

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

源：

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

注意：这仅适用于 IE（这适合您的应用程序）。

我知道它无论如何都不是防弹的，但这里有一个代码示例可以帮助您入门：

<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>

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>

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梦里人 2024-07-15 07:40:09

//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:

我希望这对你有帮助安德森·伊姆斯

//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

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