DxTagBox<TData, TValue>.ClearButtonDisplayMode Property

Specifies whether the TagBox displays the Clear button when it is not empty.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v23.2.dll

NuGet Package: DevExpress.Blazor

Declaration

[DefaultValue(DataEditorClearButtonDisplayMode.Never)]
[Parameter]
public DataEditorClearButtonDisplayMode ClearButtonDisplayMode { get; set; }

Property Value

Type	Default	Description
DataEditorClearButtonDisplayMode	Never	A DataEditorClearButtonDisplayMode enumeration value.

Available values:

Name	Description
Auto	The clear button is visible when an editor is not empty. This mode requires that the editor’s data type is nullable.
Never	The clear button is not visible.

Remarks

The Clear button clears the editor’s value (sets it to NULL). To display this button in the editor when there is a value in it, set the ClearButtonDisplayMode property to DataEditorClearButtonDisplayMode.Auto This mode also requires that the editor’s data type is nullable.

When users clear the editor’s value, the TagBox displays the NullText string (if specified).

Razor

<DxTagBox NullText="Select countries..."
          Data="@CountryData.Countries"
          @bind-Values="@SelectedCountries"
          TextFieldName="@nameof(Country.CountryName)"
          ClearButtonDisplayMode="DataEditorClearButtonDisplayMode.Auto" />
</DxTagBox>

@code {
    IEnumerable<Country> SelectedCountries { get; set; }
}

Country

public class Country {
    public int Id { get; set; }
    public string CountryName { get; set; }
}

public static class CountryData {
    private static readonly Lazy<List<Country>> countries = new Lazy<List<Country>>(() => {
        return new List<Country>()
        {
            new Country() { Id = 0, CountryName = "USA" },
            new Country() { Id = 1, CountryName = "Germany" },
            new Country() { Id = 2, CountryName = "Japan" }
        };
    });
    public static List<Country> Countries { get { return countries.Value; } }
}

Run Demo: TagBox - Clear Button and Placeholder