How to use Regular Expression For Mandatory and for Not Mandatory.

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Hello Team,

I have one query .I have the code as follow:This is one of the Regular Expression which will be Mandatory.

C#

if ($('#deoIdSelect').val().replace(' ', '') == '') {
                alert('Enter DEOID.');
                return false;
            }
            var regExpDEOID = /^[a-zA-Z0-9]*$/;
            if (!regExpDEOID.test($('#deoIdSelect').val())) {
                alert("DEOID Must Be Number and Alphabets Only.");
                return false;
            }

As in the Above Code ,i wrote the Regular expression which is working .But if in deoIdSelect
textbox i have the value like 'select' and 'DEO01',I dont want 'select' in deoIDSelect textbox ,if it is present ,it should give the alert(select the value instead of 'select').Please guide me how to modify my Regular Expression.

Secondly,If deoIDSelect is not Mandatory then what will be my Regular Expression.

Thanks
Harshal

Posted 31-Mar-14 22:48pm

R Harshal

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Peter Leow · Accepted Answer · 2014-03-31T23:30:00

Solution 1

1. Insert a if block after the first one to check the existence of substring 'select', using String.Contains Method[^]
2. The current second if block becomes the third one.
3. If not mandatory then just return true for your first if block.

+++++++++++++++++++++++++

Since you insist to use regex, then in point 1, put this code:

C#

var regExpDEOID = /select/i;
if (regExpDEOID.test($('#deoIdSelect').val())) {
    alert("select or SELECT not allowed.");
    return false;
}

Posted 31-Mar-14 23:30pm

Peter Leow

Updated 31-Mar-14 23:59pm

v2

Comments

R Harshal 1-Apr-14 5:36am

HI Peter,
Thanks For your reply.I dont want to use Contains Method.I want to do in regular Expression only.Please guide.
Thanks
Harshal

Peter Leow 1-Apr-14 6:00am

see edited solution.

R Harshal 1-Apr-14 7:32am

Thank You So much.It Works..