how to validate textbox with numbers

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Hello Frnds !!

Need to validate Textbox to allow only alphabets not numbers or any other characters.
Only user must enter a-z and A-Z

Please give me a good solution.

Thanks in advance.

Posted 16-Jul-12 0:45am

Software Engineer 892

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[no name] 16-Jul-12 8:25am

A simple search would have given you several good solutions.

7 solutions

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Afzal Shaikh · Answer 1 · 2012-07-16T00:51:00

Use below regular expression.change ControlToValidate with the textbox name and ValidateGroup.

XML

<asp:RegularExpressionValidator ID="RegTxtUname" runat="server" ErrorMessage="Invalid Character"
                                        ControlToValidate="TxtUname" ValidationExpression="^[A-Z a-z]{1}[.]{1}[A-Za-z]+"
                                        ValidationGroup="Create"></asp:RegularExpressionValidator>

Thanks,

StianSandberg · Answer 2 · 2012-07-16T01:04:00

I like to avoid these builtin validation controls for a number of reasons. So my suggestion is to make a generic function that will work easily for your whole site:

JavaScript

$(function () {
    $('input.alphanumeric').keyup(function () {
        if (this.value.match(/[^a-zA-Z0-9 ]/g)) {
            this.value = this.value.replace(/[^a-zA-Z0-9 ]/g, '');
        }
    });
});

Then you can just add a class="alphanumeric" to all of your textboxes..

HTML

<input type="text" class="alphanumeric" />

Nileshbhai · Answer 3 · 2012-07-16T01:08:00

Solution 4

hello,

using validation group

HTML

<asp:regularexpressionvalidator id="RegTxtUname" runat="server" errormessage="Invalid Character" 
ControlToValidate="TxtUname" 
ValidationExpression="^[A-Z a-z]{1}[.]{1}[A-Za-z]+"
ValidationGroup="Create" />

it will check the number.

Posted 16-Jul-12 1:08am

Nileshbhai

Updated 16-Jul-12 1:54am

v2

Rahul Rajat Singh · Answer 4 · 2012-07-16T01:22:00

This article contains all the possible scenarios you may need. You just have to include the JS file and call the appropriate function.

Also, the tiny framework contains the functions for filtering the input too. so if you want to restrict the user to enter only alphabets, you can do that too.

A Tiny Javascript Framework for Common Validation Scenarios.[^]

let me know if my understanding is correct and the link is helpful. else I will try to refine my answer.

hari19113 · Answer 5 · 2012-07-16T02:09:00

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Allow Only Numbers and alpahabates Page</title>
<script type="text/javascript">
//Function to allow only numbers to textbox
function validate(key)
{
//getting key code of pressed key
var keycode = (key.which) ? key.which : key.keyCode;
var phn = document.getElementById('txtPhn');
//comparing pressed keycodes
if ((keycode < 48 || keycode > 57))
{
return false;
}
else
{
//Condition to check textbox contains ten numbers or not
if (phn.value.length <10)
{
return true;
}
else
{
return false;
}
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:textbox id="txtPhn" runat="server" onkeypress="return validate(event)" xmlns:asp="#unknown"></asp:textbox>
</div>
</form>
</body>
</html></html>

Hope this will solve your problem.

Kishan Hadiyal · Answer 6 · 2012-07-16T02:21:00

XML

<asp:TextBox ID="TextBox1" runat="server" Style="z-index: 100; left: 259px; position: absolute;
top: 283px" ValidationGroup="check"></asp:TextBox>

<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="TextBox1"
ErrorMessage="Please Enter Only Numbers" Style="z-index: 101; left: 424px; position: absolute;
top: 285px" ValidationExpression="^\d+$" ValidationGroup="check"></asp:RegularExpressionValidator>

Unareshraju · Answer 7 · 2012-07-16T02:32:00

Solution 8

see the below
\http://forums.asp.net/t/897862.aspx/1[^]

Posted 16-Jul-12 2:32am

Unareshraju

how to validate textbox with numbers

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