validate the numerice and dot and backspace also validate single dot(.) without enter other digits

Question

0.00/5 (No votes)

See more:

heyyy ...I have to validate the numeric and dot and backspace also validate single dot enter...(ie. enter dot(.) only without entering other digits)

but my code is allowed '.' dot ...here is my code..and tell how can I validate the dot(.) in textbox

XML

<asp:TextBox ID="textPaid" runat="server" onkeypress="return isNumberKeynew(event)"
                                            oncopy="return false" onpaste="return false" oncut="return false" ondragstart="return false" ondrop="return false" AutoComplete="off" attr-identity="PaidAmount"
                                         MaxLength="7" CssClass="textboxForBill1"></asp:TextBox>

C#

function isNumberKeynew(evt)
      {
         var charCode = (evt.which) ? evt.which : event.keyCode;
         if (charCode != 46 && charCode > 31
           && (charCode < 48 || charCode > 57))
            return false;

         return true;
      }

Posted 22-Jan-13 23:46pm

aravindnass

Updated 23-Jan-13 8:04am

BC @ CV

v3

Add a Solution

Comments

Member 9644686 23-Jan-13 6:09am

can u tell me u want to allows dot,backspace,numeric in ur textbox not anothers
is it write.

aravindnass 23-Jan-13 6:23am

yes...the above javascript is to allow this ...but my problem is the javascript allows single . (dot)..(so textbox accepts single '.' without entering any values)

Eg: 12.22 - valid
. - invalid

[no name] 23-Jan-13 7:30am

use regular expresn or just read input of textbox along with event and throw alert accordingly..

aravindnass 23-Jan-13 10:52am

can u give me regular expression for this

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Pallavi Waikar · Answer 1 · 2013-01-23T06:37:00

try this code.....

XML

<asp:TextBox ID="textPaid" runat="server"></asp:TextBox>
<asp:RegularExpressionValidator ID="regexpName" runat="server"
                                    ErrorMessage="This expression does not validate."
                                    ControlToValidate="textPaid"
                                    ValidationExpression="^[0-9]*\.?[0-9]*$" />

also go through following link's for custom regular expression validator....
http://msdn.microsoft.com/en-us/library/ff650303.aspx[^]
http://msdn.microsoft.com/en-us/library/ms972966.aspx[^]
Validation with Regular Expressions Made Simple[^]