Allow Numeric Only (0-9) In HTML Text Input Using JQuery
> Here we consider how to Allow Numeric Only (0-9) In HTML Text Input Using JQuery.
> Suppose you have a textbox with ID txtNumeric.
> You want only numeric 0-9 entires on this textbox.
> If you are using HTML5, this validation can be achieved by following code.
 In HTML Text Input Using JQuery 1.png "Allow Numeric Only (0-9) In HTML Text Input Using JQuery, Allow Numeric Only (0-9) On textbox, Allow Numeric Only (0-9) On textbox Using Jquery, Allow Numeric Only (0-9) On textbox Validation, Allow Numeric Only, Allow Digits Only, Prevent Alpha Values, Asp.Net")
> This can be easily achieved by using Jquery.
> Inside keydown event of textbox, we have to write following code.
$(function () {
$("#txtNumeric").keydown(function (e) {
if ((e.keyCode == 65 && (e.ctrlKey === true || e.metaKey === true)) ||
(e.keyCode >= 35 && e.keyCode <= 40) ||
$.inArray(e.keyCode, [46, 8, 9, 27, 13, 110, 190]) !== -1) {
return;
}
if ((e.shiftKey || (e.keyCode < 48 || e.keyCode > 57)) &&
(e.keyCode < 96 || e.keyCode > 105)) {
e.preventDefault();
}
});
});
Explanation
> In the above validation, following line ensure that it is a Number and Stop the keypress
if ((e.shiftKey || (e.keyCode < 48 || e.keyCode > 57))
&& (e.keyCode < 96 || e.keyCode > 105)) {
e.preventDefault();
}
> Following line Allow Ctrl+A and Command+A
(e.keyCode == 65 && ( e.ctrlKey === true || e.metaKey === true ) )
> Following line Allow home, end, left, right, down and up keys
(e.keyCode >= 35 && e.keyCode <= 40)
> Following line Allow backspace, delete, tab, escape, enter keys
$.inArray(e.keyCode, [46, 8, 9, 27, 13, 110, 190]) !== -1
> By providing the above validation, we can allow only numeric keys only.
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