Blacklist alphabets.

[Tia]

Hi,

I want to know how to prevent the user from entering alphabets in a textbox and show a warning symbol if user attempt to enter alphabets.

Thanks,
Tia.

[Shinu]

Hi,

One suggestion is that you can use RadNumericTextBox which restricts user input to numeric values. Check the following documentation for more.
RadNumericTextBox Basics

Thanks,
Shinu

[Tia]

Hi Shinu, I am aware of the RadNumericTextBox but it allows only numbers. I just want to restrict alphabets only and accept special characters also.

[Shinu]

Hi,

Try the following code.

ASPX:

<telerik:RadTextBox ID="RadTextBox1" runat="server">
    <ClientEvents OnKeyPress="OnKeyPress" />
</telerik:RadTextBox>
<asp:Image ID="Image1" runat="server" ImageUrl="~/Images/warning.gif" ImageAlign="AbsMiddle"
    Height="16px" Width="16px" Style="margin-left: -22px; margin-top: 3px; display: none;" />

JavaScript:

<script type="text/javascript">
    function OnKeyPress(sender, args) {
        var Image1 = document.getElementById('<%=Image1.ClientID%>');
        var text = sender.get_value() + args.get_keyCharacter();
        if (!text.match('^[0-9#$%^&*()@!]*$')) {
            if (args.get_keyCode() != 13) {
                Image1.style.display = "inline";
                args.set_cancel(true);
            }
            else {
                Image1.style.display = "none";
            }
        }
        else {
            Image1.style.display = "none";
        }
    }
</script>

Thanks,
Shinu

[Tia]

Thanks shinu for your valuable reply.

[Shivam]

I am using a simple RadNumericTextBox.
But none of the properties are working.


My requirements:1) Group Separator 2) SelectionOnFocus = "SelectAll"
I have tried everything for above two but none of the things worked.
Observtions: 1) maxlength property is working if i use. 2) minvalue property is also working. 3) Decimal value is also working.Can anyone help me out on this. It is very much needed.