RadNumericTextBox and scientific notation

[R]

Hello,
how to allow a user to enter a number type 1.2e-36 in a radnumnertextebox ?
Thanx

[Eyup]

Hello,

Generally, this requirement is not supported since the RadNumericTextBox is for numbers only and does not allows letters. You can use RadTextBox or RadMaskedTextBox to achieve the requested functionality.

Nevertheless, you can try this approach to work around the default behavior:

<telerik:RadNumericTextBox ID="RadNumericTextBox1" Skin="Default" runat="server">
    <ClientEvents OnKeyPress="keyPress" OnValueChanged="valueChanged" />
</telerik:RadNumericTextBox>

JavaScript:

<script type="text/javascript">
    //Put your JavaScript code here.
    Telerik.Web.UI.RadNumericTextBox.prototype._compileRegEx = function () {
        var regexDecimalSeparator = this.get_numberFormat().DecimalSeparator == "." ? "\\." : this.get_numberFormat().DecimalSeparator;
        this._acceptRegExp = new RegExp("[e0-9" + regexDecimalSeparator + this.get_numberFormat().NegativeSign + "]{1}");
        this._rejectRegExp = new RegExp("[^e0-9" + regexDecimalSeparator + this.get_numberFormat().NegativeSign + "]{1}", "g");
        this._decimalReplaceRegExp = new RegExp(regexDecimalSeparator, "g");
    };
    var orgNegativeSign = "";
    function keyPress(sender, args) {
        if (args.get_keyCode() == 45) {
            orgNegativeSign = sender.get_numberFormat().NegativeSign;
            sender.get_numberFormat().NegativeSign = "~";
        }
    }
    function valueChanged(sender, args) {
        if (orgNegativeSign != "") {
            sender.get_numberFormat().NegativeSign = orgNegativeSign;
            orgNegativeSign = "";
        }
    }
</script>

Hope this helps. Please give it a try and let  me know if it works for you.

Regards,
Eyup
Telerik