JavaScript for only allow 6-8 digits , only numbers

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JavaScript for only allow digits and in range 6-8

use in ASP.Net
and how to put in textbox.?

Ex. 123456
Ex. 12345678

Posted 20-Feb-15 22:11pm

Karmesh_Madhavi

Updated 20-Feb-15 22:47pm

v2

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[no name] 21-Feb-15 4:22am

What u mean?can u explain?

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Thomas Daniels · Answer 1 · 2015-02-20T22:23:00

For this purpose, you can use an ASP.NET RangeValidator[^]:

ASP.NET

<asp:RangeValidator ID="digitRangeValidator"
        ControlToValidate="yourTextBox"
        MinimumValue="6"
        MaximumValue="8"
        Type="Integer"
        Text="The value must be from 6 to 8."
        runat="server"/>

And on the server, you can check whether the input is valid: if digitRangeValidator.IsValid is true, then the input is valid.

Nitij · Answer 2 · 2015-02-20T22:27:00

You can do one of the following:

1) Use Asp.Net's range validator.
https://msdn.microsoft.com/en-us/library/f70d09xt(v=vs.71).aspx[^]

2) Or if you are a JavaScript-UI ninja then do something like this:

XML

<input type="text" id="txtNumber" runat="server"/>
    <script>

        document.addEventListener('DOMContentLoaded', function () {
            var textBox = document.getElementById('txtNumber');
            textBox.onchange = validateNumbeRange.bind(textbox, 6, 8);
        });

        function validateNumbeRange(min, max) {
            var value = parseFloat(this.value);

            if (isNaN(value) || !(!isNaN(value) && value >= min && value <= max))
                alert('Invalid value');
        }
    </script>

The above is calling a function on textbox value change and then validating the value.

JavaScript for only allow 6-8 digits , only numbers

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