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MultiColumnComboBox Filter

The MultiColumnComboBox component allows users to filter items by their text, so they can find the one they need faster.

To enable filtering, set the Filterable parameter to true. The filtering is case insensitive. You can also implement custom (server) filtering and set a data source dynamically through the OnRead event.

Filtering looks in the TextField, and the filter is reset when the dropdown closes.

Filter Operator

The default filter operator is starts with. You can choose a different operator through the FilterOperator parameter that takes a member of the Telerik.Blazor.StringFilterOperator enum.


By default, the filtering is debounced with 150ms. Configure that with the DebounceDelay parameter of the component.

Filtering Example

Filtering in the MultiColumnComboBox

            Filter operator:
            <TelerikDropDownList @bind-Value="@FilterOperator"
                                 Width="160px" />
            Debounce delay:
            <TelerikNumericTextBox @bind-Value="@DebounceDelay" Min="0" Width="120px" />

<p>Type some digits:</p>

<TelerikMultiColumnComboBox Data="@MultiComboData"
        <MultiColumnComboBoxColumn Field="@nameof(Product.Name)" />
        <MultiColumnComboBoxColumn Field="@nameof(Product.Quantity)" Width="100px" />

    private List<Product> MultiComboData { get; set; }

    private int? SelectedProduct { get; set; }

    private List<StringFilterOperator> FilterOperators =>

    private StringFilterOperator FilterOperator { get; set; } = StringFilterOperator.StartsWith;

    private int DebounceDelay { get; set; } = 150;

    protected override void OnInitialized()
        MultiComboData = new List<Product>();

        var rnd = new Random();

        for (int i = 1; i <= 30; i++)
            MultiComboData.Add(new Product()
                Id = i,
                Name = $"{i} Product {i * 111222}",
                Quantity = rnd.Next(0, 30)


    public class Product
        public int Id { get; set; }
        public string Name { get; set; }
        public int Quantity { get; set; }

See Also

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