How to validate textbox inside gridview to accept numeric values only

of course, yes, Its asp item template inside gridview. i've successfully applied outside gridview but unable to apply inside gridview. ASP.NET 4.0

I've successfully applied outside gridview with following methods
in aspx page<title>ExtendedGridView demo</title>
<script type="text/javascript">
function isNumberKey(evt)
{
var charCode = (evt.which) ? evt.which : event.keyCode
if (charCode > 31 && (charCode < 48 || charCode > 57) )
return false;
return true;
}
</script>

and same page load event on cs file
TetxBox1.Attributes.Add("onkeypress", "return isNumberKey(event)");

3 solutions

Solution 1

Assuming this is not a web app, because if it was, you'd have said so, handle the keypress or keydown event for your textbox, and call a method that checks Char.IsDigit and Char.IsControl and set Handled = true so that the keypress is rejected. If this is a web app question, tag your questions properly.

Posted 3-Aug-12 17:41pm

Christian Graus

Solution 2

Have a look at the RequiredFieldValidator[^].

This article[^] should also give you some updates.

Posted 3-Aug-12 17:58pm

Abhinav S

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_Amy · Accepted Answer · 2012-08-03T18:09:00

Hi,
Try this:
HTML:

ASP.NET

<asp:TextBox ID="txtUID" runat="server" CssClass="TextBox" onkeypress="return onlyNumbers(this);"/>

JAVASCRIPT:

JavaScript

//Restrict the user to key-in chrectors and other special charectors
function onlyNumbers(evt) {
    var e = event || evt; // for trans-browser compatibility
    var charCode = e.which || e.keyCode;
    if (charCode > 31 && (charCode < 48 || charCode > 57))
        return false;
    return true;
}

And also use RequiredFieldValidator if the field is required to key-in by user.

--Amit