How to check space and special characters in textbox using a js file .

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Posted 31-Mar-14 19:55pm

Rahul 105

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Kornfeld Eliyahu Peter 1-Apr-14 1:59am

Did you heard about regex?

Snesh Prajapati 1-Apr-14 2:47am

You will get a lot of resources on Google. Please use it.

Member 11407188 24-Aug-15 7:07am

fvdvsdfvdsfv

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Charan_Kumar · Answer 1 · 2014-03-31T20:45:00

C#

//This functions allows user to enter alphabets (A-Z, a-z) and special characters *.*, *-* (dot, dash)
//Method : onkeypress = "return ValidateUsernameOnly(event);"
function ValidateUsernameOnly(evt) {
    evt = (evt) ? evt : event;
    var characterCode = (evt.charCode) ? evt.charCode : ((evt.keyCode) ? evt.keyCode :
  ((evt.which) ? evt.which : 0));
    if (characterCode > 31 && (characterCode < 65 || characterCode > 90) && (characterCode < 45 || characterCode > 46) &&
    (characterCode < 97 || characterCode > 122) && (characterCode < 48 || characterCode > 57)) {
        return false;
    }
    return true;
}

Er. Puneet Goel · Answer 2 · 2014-03-31T21:06:00

Hi,

you can call this function like

JavaScript

function validate() {
            var TCode = document.getElementById('TBtext').value;

            if (/[^a-zA-Z0-9\-\/]/.test(TCode)) {
                alert('Input is not alphanumeric');
                return false;
            }

            return true;
        }

HTML Call:

ASP.NET

<asp:textbox id="TBtext" runat="server" onblur="validate();" xmlns:asp="#unknown"></asp:textbox>

How to check space and special characters in textbox using a js file .

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