Textbox accept only numbers using java script?

Question

1.31/5 (3 votes)

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C#

Javascript

C#4.0

I am taking a textbox, but this textbox accept only numbers.using java script,how can i write?please help me?

Posted 17-Oct-13 2:18am

santhu888

Updated 23-Mar-20 9:10am

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5 solutions

Solution 4

try this....
function isNumberKey(evt)
{
var charCode = (evt.which) ? evt.which : event.keyCode;
if (charCode != 46 && charCode > 31
&& (charCode < 48 || charCode > 57))
return false;

return true;
}

Posted 17-Oct-13 2:48am

Ramesh.G>K>R

Solution 1

See this: Numbers only javascript validation[^]

Posted 17-Oct-13 2:22am

Thanks7872

Solution 7

Javascript For only numeric value in textbox ::

<input type="text" id="textBox" runat="server" class="form-control"                                                                              onkeydown="return onlyNos(event)" tabindex="0" />

<!--Only Numeric value in Textbox Script -->
    <script type="text/javascript">
        function onlyNos(e, t) {
            try {
                if (window.event) {
                    var charCode = window.event.keyCode;
                }
                else if (e) {
                    var charCode = e.which;
                }
                else { return true; }
                if (charCode > 31 && (charCode < 48 || charCode > 57)) {
                    return false;
                }
                return true;
            }
            catch (err) {
                alert(err.Description);
            }
        }
    </script>
    <!--Only Numeric value in Textbox Script -->

Posted 18-Feb-19 18:07pm

JIYAUL MUSTAPHA

Comments

Richard Deeming 20-Feb-19 9:47am

An unexplained code-dump isn't really a solution. How about explaining what your code provides that the existing (and accepted) solutions don't?

OriginalGriff 2-Sep-19 10:55am

"rep points" I suspect ...

Solution 10

//OTHER METHOD BY CLASS
I share this way of allowing the entry of only numbers through a class, to be able to add them to the inputs.

JavaScript

var keyNoNumbers = [8, 9, 16, 37, 38, 39, 40, 46]; // e.which( scape:8, tab:9, shift:16, direccional:37-40, suprimir:46, enter:13 )   
 
var keyboardRightNumbers  = [97, 98, 99, 100, 101, 102, 103, 104, 105]; // e.which(teclado numerico derecho : 96-105)

var generalKeysEnabled   = keyNoNumbers.concat(keyboardRightNumbers);

    $(".onlyNumbers").on('keydown', function(e){
        var str= String.fromCharCode(e.which);        
        if (!(generalKeysEnabled.includes(e.which))){
            if (!(/[0-9]/.test(str))) {
                e.preventDefault();
            }
        }
    });

Posted 23-Mar-20 9:11am

Member 11175195

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Siva Hyderabad · Accepted Answer · 2013-10-17T02:30:00

C#

      <script type="text/javascript" language="javascript">
function validatenumerics(key) {
           //getting key code of pressed key
           var keycode = (key.which) ? key.which : key.keyCode;
           //comparing pressed keycodes

           if (keycode > 31 && (keycode < 48 || keycode > 57)) {
               alert(" You can enter only characters 0 to 9 ");
               return false;
           }
           else return true;


       }



       <asp:textbox runat="server" id="txtquantity" width="90px" onkeypress="return validatenumerics(event);" xmlns:asp="#unknown" />