Selection

The SegmentedControl exposes properties, which can help you work with the items selection.

Setting the Selected Segment

The SegmentedControl provides a SelectedIndex property, which you can use to set the selected item.

Setting the Selection Colors

You can define custom colors for the text and the background of the selected segment by using the SelectedSegmentBackgroundColor and SelectedSegmentTextColor properties of the SegmentedControl.

Updating the Selected Item

The SegmentedControl exposes a SelectionChanged event, which is fired when the selected item is programmatically changed or updated due to user interaction.

The SelectionChanged event handler receives two parameters:

• The sender argument, which is of type object, but can be cast to the RadSegmentedControl type.
• A ValueChangedEventArgs<int> object, which provides the old and new value of the SelectedIndex.

Example

The following example demonstrates how to utilize the selection feature of SegmentedControl.

1. First, create a ViewModel class containing the SegmentedControl items and the int property for defining the SelectedIndex:

   public class ViewModel
   {
   public ViewModel()
   {
       this.Categories = new ObservableCollection<string>() { "Popular", "Library", "Playlists", "Friends" };
       this.SelectedCategory = 2;
   }
   
   public ObservableCollection<string> Categories { get; set; }
   public int SelectedCategory { get; set; }
   }
   

2. Then, add the SegmentedControl definition and apply the ItemsSource, SelectedIndex, and the selection colors properties:

   <telerik:RadSegmentedControl x:Name="segmentControl"
                               ItemsSource="{Binding Categories}"
                               SelectedIndex="{Binding SelectedCategory}"
                               SelectedSegmentTextColor="White"
                               SelectedSegmentBackgroundColor="CornflowerBlue"                                
                               HeightRequest="60"
                               VerticalOptions="Start">
   </telerik:RadSegmentedControl>
   

3. Lastly, define the ViewModel as the BindingContext of the control:

   this.segmentControl.BindingContext = new ViewModel();
   

   The image below shows the end result on different platforms:

See Also

• Customizing the Segment Colors