Disable Cut ,Copy,Paste

Solution 1:
<asp:TextBox ID="TextBox1" runat="server" oncopy="return false" onpaste="return false" oncut="return false" </asp:TextBox>

Solution 2:
<script language="javascript">

function DisableRightClick(event)

{

//For mouse right click

if (event.button==2)

{

alert("Right Clicking not allowed!");

}

}

function DisableCtrlKey(e)

{

var code = (document.all) ? event.keyCode:e.which;

var message = "Ctrl key functionality is disabled!";

// look for CTRL key press

if (parseInt(code)==17)

{
alert(message);
window.event.returnValue = false;
}

}

</script>