Mulit Column for one field

[Laura]

I have a combo box for one field - providers. There is a list of 264 providers. I don't want the user to have to scroll down through 264 items, and would like to display it in 3 columns and the user can go down or across to chose the provider. Is this possible using a combo box?

Thanks,
Laura

[Shinu]

Hi Laura,

One suggestion to achieve this scenario is that, add one DataList as ItemTemplate of RadComboBox, then call the JavaScript function for setting the text of RadComboBox. Try the below codes.

ASPX:

<telerik:RadComboBox ID="RadComboBox1" Runat="server" OnClientSelectedIndexChanged="dropdownclosed" OnClientDropDownClosed="dropdownclosed" >
        <ItemTemplate>
        <asp:DataList id="repeater" runat="server" RepeatColumns="3"
            RepeatDirection="Vertical" DataSourceID="SqlDataSource1"
            onselectedindexchanged="repeater_SelectedIndexChanged" >
            <ItemTemplate>
            <table>
                <tr>
                <td>
                    <label  onclick="click_label('<%# DataBinder.Eval(Container.DataItem,"Name") %>'); return false;">
                        <%# DataBinder.Eval(Container.DataItem,"Name") %>
                    </label>
                </td>
                </tr>
            </table>
            </ItemTemplate>
        </asp:DataList>
        </ItemTemplate>
        <Items>
            <telerik:RadComboBoxItem></telerik:RadComboBoxItem>
        </Items>
</telerik:RadComboBox>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
            ConnectionString="<%$ ConnectionStrings:TestConnectionString %>"
            SelectCommand="SELECT [Name] FROM [States]">
</asp:SqlDataSource>

JavaScript:

<script type="text/javascript">
var selecteditem;
function click_label(variable)
{
    selecteditem=String(variable);
}
function dropdownclosed()
{
    var combo = $find("<%= RadComboBox1.ClientID %>");
    combo.set_text(String(selecteditem));
}
</script>

Regards,
Shinu.

[Laura]

Thank you Shinu. When I try to implement this in t the radcombo box, when I have a list of 264 items, the page takes too long to load, and when I use a combo box that has over 1000 items, I get an out of memory error.

How would be the best way to have the user choose from such a large list of items?

Thanks,
Laura