Question

In asp.net project,
I want to group digits while typing in a textbox.
Example:
123456123456
123.456.123.456

My aim is not grouping ip adress. I want it to read numbers easily. eg : 12.000.152.156.123.156

How can i do this?

Answer 1

Edit: If you instead want to do that on serverside(don’t tag javascript, people have spent a lot of time to provide you a clientside solution):

double number = 123456123456;
String numeric = String.Format("{0:#,0}", number); // "123.456.123.456"

http://msdn.microsoft.com/en-us/library/dwhawy9k.aspx

---

added by balexandre

and you can always add some simple validation

using System.Net;

IPAddress ip = new System.Net.IPAddress(); 
if(IPAddress.TryParse(numeric, out ip))
    // you get a valid IP Address in the ip variable
else
    // IP Address not valid, go back and ask again...

---

If you want to add a thousand separator to a numeric string value you can use this function:

<script type="text/javascript">
    function groupDigit(strDigit, separator) {
        if (separator == null || separator.length == 0) separator = ".";
        strDigit += '';
        x = strDigit.split('.');
        x1 = x[0];
        x2 = x.length > 1 ? '.' + x[1] : '';
        var rgx = /(\d+)(\d{3})/;
        while (rgx.test(x1)) {
            x1 = x1.replace(rgx, '$1' + separator + '$2');
        }
        return x1 + x2;
    }
</script>

test:

alert(groupDigit("123456123456", ".")); // 123.456.123.456