Question

I have a gridview and it has some columns .
For example: Name|Age|Birthday
How can I filter the textbox so if the user is typing a special character it won’t be added.

I know I need to use this : ^[^0-9a-zA-Z]*$ , but I don’t know how.

Thanks

Answer 1

OnBlur and OnKeyUp Events of TextBox

JavaScript

<script language="javascript" type="text/javascript">
    function validation() {
        var txt = document.getElementById('<%= txt.ClientID%>').value;
        var regex = new RegExp('[^0-9a-zA-Z]+');
        while (txt.match(regex)) {
            if (txt.match(regex)[0] == "") break;
            txt = txt.replace(regex, '');
        }
        document.getElementById('<%= txt.ClientID%>').value = txt;
    }
    function onkeyUpEvent() {
        validation();
    }

    function onBlurEvent() {
        validation();
    }
</script>

MarkUp

<asp:TextBox ID="txt" runat="server" onkeyup="onkeyUpEvent();" 
                                           onblur="onBlurEvent();"></asp:TextBox>