Restrict paste and drop in textbox in asp.net

[Shlesh]

any body tell me how can i restrict pasting and drop in asp.net?

[ashishkumar008]

try this code.
i hope this is useful for u.

<asp:TextBox ID="TextBox1" runat="server" onpaste="return false" onDrop="blur();return false" Width="438px" Height="36px"></asp:TextBox></div>

[crishjeny]

Hi..
You will need two java script functions for this:

function noCopyMouse(e) {
    var isRight = (e.button) ? (e.button == 2) : (e.which == 3);

    if(isRight) {
        alert('You are prompted to type this twice for a reason!');
        return false;
    }
    return true;
}

function noCopyKey(e) {
    var forbiddenKeys = new Array('c','x','v');
    var keyCode = (e.keyCode) ? e.keyCode : e.which;
    var isCtrl;

    if(window.event)
        isCtrl = e.ctrlKey
    else
        isCtrl = (window.Event) ? ((e.modifiers & Event.CTRL_MASK) == Event.CTRL_MASK) : false;

    if(isCtrl) {
        for(i = 0; i < forbiddenKeys.length; i++) {
            if(forbiddenKeys[i] == String.fromCharCode(keyCode).toLowerCase()) {
                alert('You are prompted to type this twice for a reason!');
                return false;
            }
        }
    }
    return true;
}

And a wee bit of code-behind to handle the two events for the textbox(es):

Textbox1.Attributes.Add("onmousedown", "return noCopyMouse(event);")
Textbox1.Attributes.Add("onkeydown", "return noCopyKey(event);")

Realize that the user can still use Edit|Copy and Edit|Paste in their browser menu. There's nothing you can do to prevent that, unfortunately.

Hope this helps! Don't forget to mark the most helpful post(s) as Answer for the sake of future readers. Thanks!