How to create a checkbox in the form of xamarin

Question

I need to control the checkbox in xamarin formats, as well as the event when the control checks how I can get it, I use the switch control, but it has no event when IsChecked changes, I need to group the checkbox, it is not possible to control the switch in forms xamarin

Answer 1

The Switch control has a Toggled event that will fire when a state changes.

There is no Checkbox control in the forms, since there is no Checkbox control on each mobile platform.

XF Labs (the open source suite of extensions for XF) has a checkbox flag that can suit your needs.

Answer 2

public class CustomCheckbox : Image { private const string CheckboxUnCheckedImage = "checkbox_unchecked"; private const string CheckboxCheckedImage = "checkbox_checked"; public CustomCheckbox() { Source = CheckboxUnCheckedImage; var imageTapGesture = new TapGestureRecognizer(); imageTapGesture.Tapped += ImageTapGestureOnTapped; GestureRecognizers.Add(imageTapGesture); PropertyChanged += OnPropertyChanged; } private void ImageTapGestureOnTapped(object sender, EventArgs eventArgs) { if (IsEnabled) { Checked = !Checked; } } /// <summary> /// The checked changed event. /// </summary> public event EventHandler<bool> CheckedChanged; /// <summary> /// The checked state property. /// </summary> public static readonly BindableProperty CheckedProperty = BindableProperty.Create("Checked", typeof(bool), typeof(CustomCheckbox), false, BindingMode.TwoWay, propertyChanged: OnCheckedPropertyChanged); public bool Checked { get { return (bool)GetValue(CheckedProperty); } set { if (Checked != value) { SetValue(CheckedProperty, value); CheckedChanged?.Invoke(this, value); } } } private void OnPropertyChanged(object sender, PropertyChangedEventArgs e) { if (e?.PropertyName == IsEnabledProperty.PropertyName) { Opacity = IsEnabled ? 1 : 0.5; } } private static void OnCheckedPropertyChanged(BindableObject bindable, object oldValue, object newValue) { var checkBox = bindable as CustomCheckbox; if (checkBox != null) { var value = newValue as bool?; checkBox.Checked = value.GetValueOrDefault(); checkBox.Source = value.GetValueOrDefault() ? CheckboxCheckedImage : CheckboxUnCheckedImage; } } }