RadNumericTextBox and asp:DropDownList

[Borislava]

I have RadNumericTextBox and asp:DropDownList. How can I implement the following:
If RadNumericTextBox.value empty or 0 set asp:DropDownList enable=true
else asp:DropDownList enable=false without postback?

[Shinu]

Hi Borislava,

Please have a look into the following code snippet to Enable/Disable the DropDownList based on the value of RadNumericTextBox.

ASPX:

<telerik:RadNumericTextBox ID="RadNumericTextBox1" runat="server" ClientEvents-OnValueChanged="OnValueChanged">
</telerik:RadNumericTextBox>
<asp:DropDownList ID="DropDownList1" runat="server">
    <asp:ListItem Text="Item1">
    </asp:ListItem>
    <asp:ListItem Text="Item2">
    </asp:ListItem>
</asp:DropDownList>

JavaScript:

<script type="text/javascript">
    function OnValueChanged(sender, args) {
        if (args.get_newValue() != "0") {
            var dropdownlist = document.getElementById("DropDownList1");
            dropdownlist.disabled = true;
        }
    }
</script>

Thanks,
Shinu.