Token Customization

AutoComplete provides an option to customize the template that visualize the tokens through TokenTemplate property.

• TokenTemplate(DataTemplate)—Defines the template used to visualize the tokens.

Example

Here is an example how to use the RadAutoComplete TokenTemplate:

1. Create the needed business objects, for example type City with the following properties:

c#

public class City
{
    public City() { }        
    public City(string name)
    {
        this.Name = name;
    }

    public string Name { get; set; }
}

2. Create a ViewModel with a collection of City objects:

c#

public class CityViewModel
{
    public List<City> Source { get; set; }
    public CityViewModel()
    {
        this.Source = new List<City>()
          {
              new City("Madrid"),
              new City("Paris"),
              new City("Barcelona"),
              new City("New York"),
              new City("Budapest"),
              new City("Sofia"),
              new City("Palermo"),
              new City("Melbourne"),
              new City("London"),
              new City("Nagoya"),
              new City("Tokyo"),
              new City("Atlanta"),
              new City("Toronto"),
              new City("Athens"),
          };
    }
}

3. The following snippet shows the TokenTemplate definition:

xaml

<telerik:RadAutoComplete.TokenTemplate>
    <DataTemplate>
        <telerik:RadBorder BorderColor="#8660C5" 
                           BorderThickness="2" 
                           CornerRadius="5"
                           Margin="2">
            <HorizontalStackLayout BackgroundColor="White" 
                                   Margin="2">
                <Label Text="{Binding Name}"
                       TextColor="Black"
                       VerticalTextAlignment="Center"
                       Margin="2" />
                <Label Text="X" FontSize="Small"
                       VerticalTextAlignment="Center"
                       TextColor="Black"
                       Margin="2">
                    <Label.GestureRecognizers>
                        <TapGestureRecognizer Tapped="TapGestureRecognizer_Tapped"/>
                    </Label.GestureRecognizers>
                </Label>
            </HorizontalStackLayout>
        </telerik:RadBorder>
    </DataTemplate>
</telerik:RadAutoComplete.TokenTemplate>

and the code for Label.GestureRecognizer property:

c#

private void TapGestureRecognizer_Tapped(object sender, EventArgs e)
{
    var closeLabel = sender as Label;
    if (closeLabel != null)
    {
        var item = closeLabel.BindingContext as City;
        if (item != null)
        {
            this.autoCompleteTokenTemplate.Tokens.Remove(item);
        }
    }
}

Here is the result:

For AutoComplete Tokens Template example refer to the SDKBrowser Demo application.

See Also

• Remote Search
• Filtering
• Templates
• Styling