Created
September 2, 2020 00:29
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SelcetedItems not working properly (Xamarin.Forms CollectionView)
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| <?xml version="1.0" encoding="utf-8" ?> | |
| <ContentPage xmlns="http://xamarin.com/schemas/2014/forms" | |
| xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" | |
| xmlns:d="http://xamarin.com/schemas/2014/forms/design" | |
| xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" | |
| mc:Ignorable="d" | |
| x:Class="StatusSaver.Views.VideosPage"> | |
| <ContentPage.ToolbarItems> | |
| <ToolbarItem Text="Save" Command="{Binding Save}"/> | |
| <ToolbarItem Text="Save As" Command="{Binding SaveAs}"/> | |
| <ToolbarItem Text="Join and Save" Command="{Binding JoinAndSave}"/> | |
| <ToolbarItem Text="Cancel" Command="{Binding Cancel}"/> | |
| </ContentPage.ToolbarItems> | |
| <ContentPage.Content> | |
| <CollectionView ItemsSource="{Binding Videos}" | |
| ItemsLayout="VerticalGrid, 2" | |
| SelectionMode="Multiple" | |
| SelectionChangedCommand="{Binding SelectionChanged}" | |
| SelectedItems="{Binding SelectedItems, Mode=TwoWay}" | |
| x:Name="colView"> | |
| <CollectionView.ItemTemplate> | |
| <DataTemplate> | |
| <Image Source="{Binding ImageSource}"/> | |
| </DataTemplate> | |
| </CollectionView.ItemTemplate> | |
| </CollectionView> | |
| </ContentPage.Content> | |
| </ContentPage> |
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| public class VideosPageViewModel | |
| { | |
| private readonly IPageManager _pageManager; | |
| private readonly IMediaManager _mediaManager; | |
| private readonly IMessage _message; | |
| public VideosPageViewModel(IPathManager pathManager, IPageManager pageManager, | |
| IThumbnailGenerator thumbnailGenerator, IMediaManager mediaManager, IMessage message) | |
| { | |
| // ViewModel intialistion | |
| } | |
| public ObservableCollection<Video> Videos { get; set; } | |
| public ICommand SelectionChanged { get; set; } | |
| public ICommand Save { get; set; } | |
| public ICommand SaveAs { get; set; } | |
| public ICommand JoinAndSave { get; set; } | |
| public ICommand Cancel { get; set; } | |
| public IList<object> SelectedItems { get; set; } | |
| private void OnSelectionChanged() | |
| { | |
| } | |
| private void OnCancel() | |
| { | |
| SelectedItems = null; | |
| _message.LongAlert("All selections cancelled"); | |
| } | |
| } |
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