Regular Expression for amount(that greater than 0 ) and should not be empty

Question

1.00/5 (1 vote)

See more:

, +

heyy...

I want a Regular Expression for integer(that greater than 0 ) and should not be empty.

if empty or greater than 0 then show error msg..... .I tried but cannot find both expression together ....Any ideaa???

Posted 8-Oct-13 23:18pm

aravindnass

Add a Solution

Comments

JoCodes 9-Oct-13 5:22am

Have you tried javascript validations for the same instead of regularexpression validation control;?

Neema Derakhshan 9-Oct-13 5:25am

you should use a RequiredFieldValidator to check if it is empty and a RegularExprssionValidator to check if it is greater than 0

aravindnass 9-Oct-13 5:44am

In required field validator I set initial value to 0 , but if 0 is removed the press button ,the validation not work.....? Any solution

5 solutions

Solution 5

Suggest you to use a Custom validator control if you intent to use a single control for regular expression as well as Required value to be validated. Try something like below.

XML

<asp:CustomValidator ID="CustomValidator1" ValidateEmptyText="true"  ClientValidationFunction="ClientValidation"
ControlToValidate="TextBox1" OnServerValidate="ServerValidation"  runat="server" ErrorMessage="Errorrrr"></asp:CustomValidator

>

Add Clientside script as

XML

<script lang="javascript" type="text/javascript">
       function ClientValidation(source, arguments) {
           alert("Hi");
           if ((arguments.Value % 2) == 0 && arguments.Value >0)
               arguments.IsValid = true;
           else
               arguments.IsValid = false;
       }
</script>

Add a server side method for cross check if needed .

C#

public void ServerValidation (object source, ServerValidateEventArgs arguments)
        {
            if(!string.IsNullOrEmpty(arguments.Value))
            {
                int i = int.Parse(arguments.Value);
                arguments.IsValid = ((i%2) == 0);
            }
            else
            {
                arguments.IsValid = false;
            }
        }

Hope this helps

Posted 9-Oct-13 0:35am

JoCodes

Updated 9-Oct-13 0:37am

v2

Solution 4

use this java script

C#

function Validate()
{
var e=document.getElementById('txtNumber').value;
if(e=='' || e>0)
{
alert('Invalid Number, Please enter the number again');
}
}

<asp:textbox id="MyTextBox" runat="server" onkeyuo="return Validate()" >
</asp:textbox>

Posted 9-Oct-13 0:05am

ErBhati

Updated 9-Oct-13 0:11am

v2

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)

OriginalGriff · Accepted Answer · 2013-10-08T23:37:00

Solution 2

Regular expressions are not good for "greater than" values - they don't know about numbers at all, so the expression becomes rather clumsy:

^0*[1-9]\d*$

You would be better doing this kind of validation in code, rather than as a regex.

Posted 8-Oct-13 23:37pm

OriginalGriff

PoojaGahlaut · Accepted Answer · 2013-10-08T23:45:00

Hi, If you are doing it using Asp.net text box, then you can use RequiredFieldValidator and RegularExpressionValidators for the same text box. Regular Expression for input value more than 1 is "^[1-9]*".
You code should look like:

XML

<asp:TextBox ID="MyTextBox" runat="server"></asp:TextBox>
        <asp:RegularExpressionValidator ControlToValidate="MyTextBox" ID="regExVal" runat="server" ErrorMessage="Provide value more than 1." ValidationExpression="^[1-9]*"/>
        <asp:RequiredFieldValidator ControlToValidate="MyTextBox" ID="reqVal" runat="server" ErrorMessage="Provide some value."/>

Hope this will help.

Anurag Sinha V · Accepted Answer · 2013-10-08T23:36:00

On Submit button click, call a Js function as below:

C#

<asp:textbox id="txtNumber" runat="server" xmlns:asp="#unknown"></asp:textbox>

protected void Submit(object sender, EventArgs e)
{
Page.ClientScript.RegisterStartupScript(this.GetType(),"alert","CallMe();",true);
}

Js function:

JavaScript

function CallMe()
{
var e=document.getElementById('txtNumber').value;
if(e=='' || e>0)
{
alert('Invalid Number, Please enter the number again');
}
}