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Grouping

The demo shows how to apply group setting to the RadMultiColumnComboBox data source through the GroupByField property.
  • DefaultVB.aspx
<%@ Page Language="vb" AutoEventWireup="true"  %>

<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<%@ Register TagPrefix="qsf" Namespace="Telerik.QuickStart" %>
<!DOCTYPE html>
<html xmlns='http://www.w3.org/1999/xhtml'>
<head runat="server">
    <title>Telerik ASP.NET Example</title>
</head>
<body>
    <form id="form1" runat="server">
    <telerik:RadScriptManager runat="server" ID="RadScriptManager1" />
    <telerik:RadSkinManager ID="RadSkinManager1" runat="server" ShowChooser="true" />
    <div class="demo-container size-thin" style="text-align: center">
        <telerik:RadMultiColumnComboBox ID="RadMultiColumnComboBox4" runat="server"
            GroupByField="Country" Filter="Contains"
            DropDownWidth="500" Height="400" Width="100%" Placeholder="select from the dropdown or type"
            DataTextField="ContactName" DataValueField="CustomerID" MinLength="3" EnforceMinLength="false">
            <WebServiceSettings Select-ContentType="JSON" ServiceType="OData"
                Select-Url="https://demos.telerik.com/kendo-ui/service/Northwind.svc/Customers">
            </WebServiceSettings>
            <ColumnsCollection>
                <telerik:MultiColumnComboBoxColumn Field="CustomerID" Title="ID" />
                <telerik:MultiColumnComboBoxColumn Field="ContactName" Title="Name" />
            </ColumnsCollection>
        </telerik:RadMultiColumnComboBox>
    </div>
    </form>
</body>
</html>

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