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RadComboBox - Multicolumn - Insert a Blank Item

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ComboBox
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Calsh
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Calsh asked on 25 Oct 2013, 09:31 AM
Hi

Using a Multicolumn Combobox with OpenAccess and trying to insert a blank item - as need to have the option of not selecting any item from the list - tried various solutions/posts with no success - code for combobox as below

<telerik:RadComboBox runat="server" ID="RadComboBox1" Height="190px" Width="100%"
    MarkFirstMatch="true" DataSourceID="OpenAccessLinqDataSource1" EnableLoadOnDemand="true"
    HighlightTemplatedItems="true" DataValueField="PartID" DataTextField="PartNumber"
    AppendDataBoundItems="True" SelectedValue='<%# Bind("PartID") %>' ItemsPerRequest="10"
    EnableVirtualScrolling="True" Filter="Contains" OnSelectedIndexChanged="RadComboBox1_SelectedIndexChanged"
    AutoPostBack="True">
    <HeaderTemplate>
        <ul>
            <li class="col1">Part Number</li>
            <li class="col2">Part Description</li>
        </ul>
    </HeaderTemplate>
    <ItemTemplate>
        <ul>
            <li class="col1">
                <%# DataBinder.Eval(Container.DataItem, "PartNumber")%>
            </li>
            <li class="col2">
                <%# DataBinder.Eval(Container.DataItem, "PartDescription")%></li>
        </ul>
    </ItemTemplate>
</telerik:RadComboBox>

Tried online demo http://www.telerik.com/help/aspnet-ajax/combobox-insert-default-item-when-databinding.html 

(Using vb)

Thanks



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Boyan Dimitrov
Telerik team
answered on 30 Oct 2013, 09:38 AM
Hello,

In this case I would suggest using the RadComboBox default item. Here you may find more information and some sample code.


Regards,
Boyan Dimitrov
Telerik
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Calsh
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Boyan Dimitrov
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