1. If you don't want to alert any message then just put below property in your control to prevent Copy, Cut and Past
oncopy="return false"
onpaste="return false"
oncut="return
false"
Example:-
<asp:TextBox ID="txt" runat="server" oncopy="return false" onpaste="return false" oncut="return false"></asp:TextBox>
2.In JavaScript you can use below code
<script language="javascript" type="text/javascript">
function DisableCopyPaste(e) {
//
Message to display
var message = "Cntrl key/
Right Click Option disabled";
// check
mouse right click or Ctrl key press
var kCode = event.keyCode || e.charCode;
//FF and
Safari use e.charCode, while IE use e.keyCode
if (kCode == 17 || kCode == 2) {
alert(message);
return false;
}
}
</script>
<asp:TextBox ID="txtId" runat="server" onKeyDown="return DisableCopyPaste(event)"onMouseDown="return DisableCopyPaste (event)"></asp:TextBox>
3.In JQuery you can use below code
<script lang="javascript" type="text/javascript">
$(document).ready(function () {
$('#<%=txt.ClientID%>').bind('copy paste cut', function (e) {
e.preventDefault(); //disable cut,copy,paste
alert('cut,copy & paste options are disabled !!');
});
});
</script>
<asp:TextBox ID="txt" runat="server"></asp:TextBox>
In the .bind(param1, param2) function first parameter you have to mention the name of property on which you want to execute function and in second parameter you write that function.
4. To check existence of substring in the string
var str = $('#<%=txt.ClientID%>').val();
if (str.indexOf("Hello") >= 0) {
alert('Contains hello');
}
5. To change a string from Lower to Upper and Upper to Lower case
var
str = $('#<%=txt.ClientID%>').val();
alert(str.toLowerCase());
var str = $('#<%=txt.ClientID%>').val();
alert(str.toUpperCase());
6. To check a numeric value
var str = $('#<%=txt.ClientID%>').val();
$.isNumeric(str);
Note- Its return boolean value.
For numeric - true
For None numeric - false
