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How to allow only Credit/Debit card number format in ASP.NET textbox

I have to allow only Debit/Credit card number format in asp.net textbox. Below is a sample screenshot-
Please let me know how to do this with asp.net textbox and I don't have to use validators.
Note: I only have to allow numbers and after every 4 numbers there
should be a hyphen(-).

I would strongly recommend you not to reinvent the bicycle and use jQuery inputmask plugin which will let you do the following:
$("input").inputmask({
mask: "9999 9999 9999 9999",
placeholder: ""
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery.inputmask/3.3.4/jquery.inputmask.bundle.js"></script>
<input type="text"/>
Note that in this code I assumed that card number consists of 4 groups of 4 digits each, and it is not always true - it depends on expected cards' payment systems, country etc.
You can easily achieve any result by adding or removing digits in mask.

You can do the following:
<input type="text" onkeypress="return allowNumbersAndHyphen(event)">
function allowNumbersAndHyphen(evt) {
var charCode = (evt.which) ? evt.which : event.keyCode;
//allowing numbers, left key(37) right key(39) backspace(8) delete(46) and hyphen(45)
var length = $('input').val().length;
if (((charCode == 37 || charCode == 39 || charCode == 8 || charCode == 46 || charCode == 45) || !(charCode > 31 && (charCode < 48 || charCode > 57))) && length <19)
{
return true;
}
else{
return false;
}
}
//put hyphens atomatically
$(document).ready(function(){
$('input').on('keypress', function() {
var temp = $(this).val();
if (temp.length == 4 || temp.length == 9 || temp.length == 14) {
$('input').val(temp + '-');
}
});
$('input').on('blur', function() {
var regex = /^[0-9]{4}-[0-9]{4}-[0-9]{4}-[0-9]{4}$/;
var cardNumber = $(this).val();
if(regex.test(cardNumber)) {
//success
alert('successful');
}
else {
//show your error
alert('Error');
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!-- begin snippet: js hide: false console: true babel: false -->

Using vanilla javascript
document.getElementById('inp1').onkeypress = verify;
console.clear();
function isKeyValid(key) {
if(key > 47 && key < 58) return true
else if(key === 45) return true;
else return false;
}
function isValidCard(arr, isDash) {
const last = arr[arr.length - 1];
if(last.length === 4 && !isDash) return false;
else if(isDash && last.length !== 4) return false;
else if(isDash && arr.length === 4) return false;
else return true;
}
function verify(e) {
const key = e.keyCode || e.which;
const isDash = key === 45;
const val = e.target.value;
const input = val.split('-');
if (!isKeyValid(key) || !isValidCard(input, isDash)) {
return e.preventDefault();
}
// ...do something
}

Number in textfield should be autoformatted only after user clicks outside the textbox?

I have a problem. Basically, what happens in my case is that the numbers in my textbox are autoformatted as I type. I don't want this to happen. What I want is that the numbers should be autoformatted only when the user clicks outside the textbox.
In my input tag I have :
onkeyup="format(event, this);"
My javascript function is :
function format(e, obj) {
if (e.keyCode == 36) {
press1(obj);
}
if (e.keyCode == 13) {
return false;
}
if ((e.keyCode <= 34) || (e.keyCode >= 46 && e.keyCode < 58) || (e.keyCode >= 96 && e.keyCode <= 105)) { // //alert(e.keyCode);
obj.value = CommaFormatted(obj.value);
} else {
if (e && e.stopPropagation) {
e.stopPropagation();
e.preventDefault();
} else {
e.cancelBubble = true;
e.returnValue = false;
}
return false;
}
}
where the press1 function is:
function press1(textControlID) {
var text = textControlID;
if (text.getAttribute("maxlength") == text.value.length) {
var FieldRange = text.createTextRange();
FieldRange.moveStart('character', text.value.length);
FieldRange.collapse();
FieldRange.select();
return true;
}
if (text != null && text.value.length > 0) {
if (text.createTextRange) {
var FieldRange = text.createTextRange();
FieldRange.moveStart('character', text.value.length);
FieldRange.collapse();
FieldRange.select();
} else if (text.setSelectionRange) {
var textLength = text.value.length;
text.setSelectionRange(textLength, textLength);
}
}
}
I really hope this could be solved. Please!

You could change onkeyup to onblur, which is the event that gets fired when the control loses focus - clicking out of it.
The onkeyup event fires with every keypress.

Call function based on input

I've an textbox in asp.net,when i enter ";" semicolon in textbox means it have to call a function.Is there any way to do this.please help me out guys..i tried change function but it calls at every keypress in textbox.
$('#prgrp').on('change', function (evt)
{
var txt = $("#prgrp").val();
var valueArray = txt.split(';');
var valueSortArray = valueArray.sort();
var duplicateValues = [];
for (var i = 0; i < valueSortArray.length; i++)
{
if (valueSortArray[i + 1] == valueSortArray[i])
{
duplicateValues.push(valueSortArray[i]);
}
}
if (duplicateValues.length > 0)
{
$("#duplicate").html("Don't enter repeated values");
$('#duplicate').css('color', 'RED');
$("#prgrp").autocomplete("disable");
}
else {
$("#duplicate").html("");
$("#prgrp").autocomplete("enable");
}
});

Try this:-
$("#prgrp").keypress(function (e) {
if (e.keyCode == 59) {
//Call your function here
}
});
Please note, you can also use e.which in place of e.keyCode as it is jquery standardized.

Try this
$('#prgrp').bind('keypress', function(e) {
var code = e.keyCode || e.which;
if(code == 59) { //
//Do something
}
});
Demo

try this code
$( "#prgrp" ).keypress(function( event ) {
if ( event.which == 59 || event.keycode == 59 ) {
//your function call
}
});

Disable first character in textbox

I have a textbox and it contain a value "Given Name". I want to disable first character of a textbox so that user cannot change the First Charcter in textbox by using backspace or any other means.
For Example: suppose textbox contains the value "Given Name". I want that user cannot change the First character "G" by using backspace or any other means.
<input type="text" id="nameId" onkeydown="validate(this.val)"/>
Below is javascript function:
function validate2(val) {
// have no idea how to do.
}
I have no idea how to do it in Javscript or Jquery.

You could do like follow :
$("#nameId").on("keydown", function(e) {
// if user writes a char at index === 0 that is not an arrow or HOME or END
if (($(this).get(0).selectionStart === 0 && (e.keyCode < 35 || e.keyCode > 40))
// or if user tries to erase first char
|| ($(this).get(0).selectionStart === 1 && $(this).get(0).selectionEnd === 1 && e.keyCode === 8)) {
// don't write the character
return false;
}
});
// prevent right click
$("#nameId").bind("contextmenu", function(e) {
e.preventDefault();
});
JSFIDDLE

Wasn't planning on answering, leaving it with the comment, but after seeing the other answers thought I might have a quick go at it after all:
The html:
<input type="text" id="nameId" value="Given Name" onkeydown="save(this,event)" onkeyup="restore(this,event)" onchange="restore(this,event)"/>
The javascript:
function restore(el,event) {
if(el.value.length == 0){
el.value = el.dataset.value.substr(0,1);
}else{
el.dataset.value = el.value;
}
}
function save(el,event) {
var key = event.which || event.charCode || event.keyCode;
if((key === 8 && el.value.length === 1)
|| (key === 46 && el.selectionStart == 0 && el.value.length === 1)){
event.preventDefault();
}
if(el.value.length > 0){
el.dataset.value = el.value;
}
}
The approach was to not mess around too much with preventing the deletion of the actual character (just the very bare basics) and instead ensure that if somebody deletes the first character to always restore it somehow. It creates code that's easy to comprehend and maintain, yet works quite neatly. A fiddle can be found here as well. Do note though that event.which is not the most cross browser consistent interface, so either use jQuery for that or check in other browsers before using it in production. Edited it in a way that should work cross browser including older browsers.

Here's mine version.
Html
<input type="text" id="nameId" value="Given Name" />
JS
var lastentry = '';
$("#nameId").on("keyup", function(e) {
var targetValue = $(e.currentTarget).attr('value');
var targetValueLength = targetValue.length;
var inputValue = this.value;
if(checkChanges(targetValueLength, targetValue, inputValue))
this.value = targetValue + lastentry;
else
lastentry = this.value.slice(targetValueLength)
});
function checkChanges(targetValueLength, targetValue, inputValue)
{
for(var i = 0; i < targetValueLength ; i++)
{
if(targetValue[i] != inputValue[i])
return true;
}
return false;
}
Demo

You can try this:-
<input type="text" id="nameId" value="Given Name" onkeydown="validate(this.value,event)"/>
<script>
function validate(val,event) {
// have no idea how to do.
if(event.target.selectionStart != undefined && (event.which === 46 ||event.which === 8)){
var startPos = event.target.selectionStart,
endPos = event.target.selectionEnd;
console.log(startPos,endPos);
if(startPos === 0 && startPos != endPos){
var restPart = val.slice(endPos,val.length);
if(restPart){
val = val[0].concat(restPart);
} else{
val = val[0]
}
event.target.value = val;
event.preventDefault();
} else if(startPos === 0 && startPos === endPos && event.which === 46){
event.preventDefault();
} else if(startPos === 1 && event.which === 8){
event.preventDefault();
}
}
}
</script>

Hi use this it do not allow to delete first character ,
$(document).keydown(function(e)
{
var value = $('#nameId').val().length;
if ( e.keyCode == 8 && value < 2)
e.preventDefault();
});

Allow to enter only 2 decimal points number

I have a condition to allow user to input only 2 decimal points number and restrict the alphabets and other characters. I used the following function:
function isNumberKeyOnlyWithDecimalFormat(event,value,id){
var val = value;
if (event.shiftKey === true) {
event.preventDefault();
}
if ((event.keyCode >= 48 && event.keyCode <= 57) ||
(event.keyCode >= 96 && event.keyCode <= 105) ||
event.keyCode == 8 ||
event.keyCode == 9 ||
event.keyCode == 37 ||
event.keyCode == 39 ||
event.keyCode == 46 ||
event.keyCode == 190) {
} else {
event.preventDefault();
}
if(val.indexOf('.') !== -1 && event.keyCode == 190){
event.preventDefault();
}
if ((pointPos = $('#'+id).val().indexOf('.')) >= 0){
$('#'+id).attr("maxLength", pointPos+3);
}
else
$('#'+id).removeAttr("maxLength");
}
It is working fine while first time adding. But it restricts the if i want to edit the digits if it has already 2 decimal place. Can anyone help with this?

Try this. It will check the value each time the focus is gone from the input field, but you can use any event you like. It will parse the value as a float, and then round it to 2 decimal points.
Here is the fiddle: http://jsfiddle.net/sAp9D/
HTML:
<input type="text" id="the_id" />
JavaScript:
var input_field = document.getElementById('the_id');
input_field.addEventListener('change', function() {
var v = parseFloat(this.value);
if (isNaN(v)) {
this.value = '';
} else {
this.value = v.toFixed(2);
}
});

Your question is very hard to understand but if you want to check that a string has only 2 decimals then you can just do this
if( value.match(/\./g).length === 2 ) {
// Number has 2 decimals eg. 1.2.3
} else {
// Number is incorrect eg. 1.2.3.4
}
or if you want 1.2 then
if( value.match(/\./g).length === 1 ) {
// Code....
}

I use the following
// This function will only allow digits
function numericFormat( fld , e , extraStrCheck )
{
var sep = 0;
var key = '';
var i = j = 0;
var len = len2 = 0;
var strCheck = '0123456789';
if ( extraStrCheck )
strCheck += extraStrCheck;
var aux = aux2 = '';
var whichCode = (window.Event) ? e.which : e.keyCode;
if (whichCode == 13) return true; // Enter
if (whichCode == 8) return true; // Backspace
if (whichCode == 0) return true; // Null
if (whichCode == 9) return true; // Tab
key = String.fromCharCode(whichCode); // Get key value from key code
if ( strCheck.indexOf(key) == -1 ) return false; // Not a valid key
var x = new String(fld.value);
if ( key == '.' )
{
var exp = /\./;
var a = x.search(exp);
if ( a != -1 ) return false;
}
}
// samer code on change or on blur event
function allow2decimal(obj){
var v = parseFloat($(obj).val());
if (isNaN(v)) {
$(obj).value = '';
} else {
newVal = v.toFixed(2);
if(newVal >= 100){
$(obj).val( 100 );
}else{
$(obj).val(newVal);
}
}
}
//usage
<input
onkeypress="return numericFormat( this , event , '.');"
onchange="allow2decimal(this)"
value="0.1"
id="factory_silk" name="factory_silk" />

<html>
<head>
<script type="text/javascript">
function NumAndTwoDecimals(e, field) {
var val = field.value;
var re = /^([0-9]+[\.]?[0-9]?[0-9]?|[0-9]+)$/g;
var re1 = /^([0-9]+[\.]?[0-9]?[0-9]?|[0-9]+)/g;
if (re.test(val)) {
}
else {
val = re1.exec(val);
if (val) {
field.value = val[0];
}
else {
field.value = "";
}
}
}
</script>
</head>
<body>
<input type="text" name="text" onkeyup="NumAndTwoDecimals(event , this);">
</body>
</html>

$('.number').keypress(function(evt){
var str = $(this).val();
var index = str.indexOf('.');
if(index==-1){index=0;}else{index= index+1;}
var extrapoint = str.indexOf('.',index);
if(extrapoint>0){$(this).val(str.slice(0,-1));}
var charCode = (evt.which) ? evt.which : event.keyCode;
if(charCode != 46 && charCode > 31 && (charCode < 48 || charCode > 57))
return false;
return true;
var validNumber = new RegExp(/^\d*\.?\d*$/);
var lastValid = $(this).val();
if (validNumber.test($(this).val()))
{
lastValid = $(this).val();
}
else
{
$(this).val(lastValid);
}
});