how to check user's data with regular expression?

Question

I have a form with some controls. I didn't use validations in visual studio toolbox, In fact I have defined validations for these controls using java script . one of these validations is Regular Expression .
how to check user's data with this regular expression?

for (i = 0; i < rows.length; i++) {
    if (patterns[i] != "") {
        val = document.get ElementById ('cntrl'+i).value;
        ptrn = patterns[i];
        if (!ptrn.test(val)) {
            msg += "bad format. \n";
            j = false;
        }
    }
}

I test this code by Firebug, but it exits from second if loop in first time.

Can we see some code, such as what you've tried, what you want to validate and the _RegExp_ you're trying to use? — Paul S., Jun 25 '13 at 23:11
Make sure to validate on the server-side, too. Validating with JavaScript should only be used for the user's convenience; JavaScript can be easily turned off, and you still need to make sure your server is safe. — voithos, Jun 25 '13 at 23:11
Just perform the same validation checks after the form submits, in ASP.NET — voithos, Jun 25 '13 at 23:24
@voithos:before submitting, I check data using javascript. your meaning is that I check them after submitting and by c#? — Angel, Jun 25 '13 at 23:28
@Angel: [Exactly](http://stackoverflow.com/questions/4076927/why-do-we-need-server-side-as-well-as-client-side-validation-for-web-application). — voithos, Jun 25 '13 at 23:29

7stud · Accepted Answer · 2013-06-25T23:24:53.817

0

var pattern = /^\d{3}[-]\d{4}$/;
var input = '867-5309';

if (input.match(pattern))
{
  console.log("Jenny I've got your number.");
}

--output:--
Jenny I've got your number

edited Jun 25 '13 at 23:24

answered Jun 25 '13 at 23:19

7stud

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how to check user's data with regular expression?

1 Answers1