https://github.com/syncfusionexamples/xamarin-forms-listview-selected-item-binding-selectionchanging-event

This repository contains the sample about how to bind selectionchanging event in Xamarin.Forms ListView
https://github.com/syncfusionexamples/xamarin-forms-listview-selected-item-binding-selectionchanging-event

listview mvvm selected-item selection selectionchange xamarin xamarin-forms

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This repository contains the sample about how to bind selectionchanging event in Xamarin.Forms ListView

• Host: GitHub
• URL: https://github.com/syncfusionexamples/xamarin-forms-listview-selected-item-binding-selectionchanging-event
• Owner: SyncfusionExamples
• Created: 2019-08-05T03:45:43.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2024-02-15T13:43:03.000Z (12 months ago)
• Last Synced: 2024-04-14T12:07:22.442Z (10 months ago)
• Topics: listview, mvvm, selected-item, selection, selectionchange, xamarin, xamarin-forms
• Language: C#
• Homepage:
• Size: 500 KB
• Stars: 0
• Watchers: 4
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Binding SelectionChanging event to Listview

In ListView, the [SelectionChanging](https://help.syncfusion.com/cr/cref_files/xamarin/Syncfusion.SfListView.XForms~Syncfusion.ListView.XForms.SfListView~SelectionChanging_EV.html) event will be raised when selecting an item at the execution time. MVVM for the `SelectionChanging` event can be achieved by binding through the event to command converter.

Refer [EventToCommand](https://www.syncfusion.com/kb/7523/how-to-turn-events-into-commands-with-behaviors-in-sflistview?_ga=2.49538854.1823797169.1563166718-1085055173.1562420655) knowledge base to create the command for event using behavior.

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```

```

//ViewModel.cs

public class BookInfoRepository : INotifyPropertyChanged

{

    private Command selectedItem

    public Command SelectedItem

    {

        get { return this.selectedItem; }

        set

        {

            this.selectedItem = value;

            this.OnPropertyChanged("SelectedItem");

        }

    }

    public BookInfoRepository()

    {

        selectedItem = new Command(OnSelectionChanging);

    }

    ///

    ///To disable the selection for particular item

    ///

    public void OnSelectionChanging(ItemSelectionChangingEventArgs obj)

    {

        var eventArgs = obj as ItemSelectionChangingEventArgs;

        if (eventArgs.AddedItems.Count > 0 && eventArgs.AddedItems[0] == this.BookInfoCollection[0])

            eventArgs.Cancel = true;

    }

}

```

To know more about MVVM in ListView, please refer our documentation [here](https://help.syncfusion.com/xamarin/sflistview/mvvm)