Макет ListView не обновляется при обновлении источника данных
В этом проекте есть источник данных, который проходит через массив StorageFolders и создает ObservableCollection с определенной информацией, такой как имя, расширение и дата изменения, которая затем привязывается к ListView, Проблема в том, что программа не будет заново заполнять ListView папками (новыми элементами), основанными на выбранном элементе. Тем не менее, я заметил, что программа обращается к подпапкам элемента, на который нажали, потому что она отображает правильный путь внизу TextBlock,
Заранее благодарим за ваше постоянное стремление помочь. Если есть какой-то способ, которым я могу улучшить этот вопрос, чтобы лучше принести пользу сообществу, пожалуйста, не стесняйтесь, дайте мне знать.
[FileLoader.cs]
namespace Files
{
public class FileLoader : INotifyPropertyChanged
{
private string FileName;
private string AccessedDate;
private string FileType;
private string FolderPath;
public string Name
{
get { return this.FileName; }
set
{
if (this.FileName != value)
{
this.FileName = value;
this.RaisePropertyChanged("Name");
}
}
}
public string Date
{
get { return this.AccessedDate; }
set
{
if (this.AccessedDate != value)
{
this.AccessedDate = value;
this.RaisePropertyChanged("Date");
}
}
}
public string Type
{
get { return this.FileType; }
set
{
if (this.FileType != value)
{
this.FileType = value;
this.RaisePropertyChanged("Type");
}
}
}
public string Path
{
get { return this.FolderPath; }
set
{
if (this.FolderPath != value)
{
this.FolderPath = value;
this.RaisePropertyChanged("Path");
}
}
}
public event PropertyChangedEventHandler PropertyChanged;
protected void RaisePropertyChanged(string name)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(name));
}
}
}
public class ItemViewModel
{
StorageFolder folder;
public ObservableCollection<FileLoader> infoList = new ObservableCollection<FileLoader>();
public ObservableCollection<FileLoader> InfoList { get { return this.infoList; } }
public ObservableCollection<FileLoader> folInfoList = new ObservableCollection<FileLoader>();
public ObservableCollection<FileLoader> FolInfoList { get { return this.folInfoList; } }
string gotName;
string gotDate;
string gotType;
string gottenPath;
string gotFolName;
string gotFolDate;
string gotFolPath;
public IReadOnlyList<StorageFolder> folderList;
public ItemViewModel(string thePath)
{
gottenPath = thePath;
GetTheFilesAsync(thePath);
GetTheFoldersAsync(thePath);
}
public async void GetTheFoldersAsync(string path)
{
FileLoader fileL = new FileLoader();
folder = await StorageFolder.GetFolderFromPathAsync(path);
folderList = await folder.GetFoldersAsync();
foreach(StorageFolder fol in folderList)
{
gotFolName = fol.Name.ToString();
gotFolDate = fol.DateCreated.ToString();
gotFolPath = fol.Path.ToString();
this.folInfoList.Add(new FileLoader() { Name = gotFolName, Date = gotFolDate, Path = gotFolPath });
}
}
public async void GetTheFilesAsync(string path)
{
folder = await StorageFolder.GetFolderFromPathAsync(path);
IReadOnlyList<StorageFile> fileList = await folder.GetFilesAsync();
foreach (StorageFile f in fileList)
{
gotName = f.Name.ToString();
gotDate = f.DateCreated.ToString(); // In the future, parse date to human readable format
gotType = f.FileType.ToString();
this.infoList.Add(new FileLoader() { Name = gotName, Date = gotDate, Type = gotType });
}
}
}
}
[GenericFileBrowser.cs]
namespace Files
{
public sealed partial class GenericFileBrowser : Page
{
string pathToView;
public TextBlock textBlock;
public GenericFileBrowser()
{
this.InitializeComponent();
textBlock = importDiag;
pathToView = @"C:\";
string pathToKeep;
string env = Environment.ExpandEnvironmentVariables("%userprofile%");
this.ViewModel = new ItemViewModel(pathToView);
this.IsTextScaleFactorEnabled = true;
ApplicationView.GetForCurrentView().SetPreferredMinSize(new Size(500, 500));
var CoreTitleBar = CoreApplication.GetCurrentView().TitleBar;
CoreTitleBar.ExtendViewIntoTitleBar = true;
var titleBar = ApplicationView.GetForCurrentView().TitleBar;
titleBar.ButtonBackgroundColor = Color.FromArgb(100, 255, 255, 255);
titleBar.ButtonHoverBackgroundColor = Color.FromArgb(75, 10, 10, 10);
titleBar.ButtonHoverBackgroundColor = Color.FromArgb(75, 10, 10, 10);
}
public ItemViewModel ViewModel { get; set; }
private void navView_ItemInvoked(NavigationView sender, NavigationViewSelectionChangedEventArgs args)
{
NavigationViewItem item = args.SelectedItem as NavigationViewItem;
if (item.Name == "homeIc")
{
this.Frame.Navigate(typeof(MainPage));
}
else if (item.Name == "DesktopIC")
{
this.Frame.Navigate(typeof(Desktop));
}
}
private void FolderView_ItemClick(object sender, SelectionChangedEventArgs e)
{
var selectedIndex = FolderView.Items.IndexOf(FolderView.SelectedItem);
string pathOfSelected = ViewModel.FolInfoList[selectedIndex].Path;
importDiag.Text = pathOfSelected;
ViewModel = new ItemViewModel(pathOfSelected);
}
private void FileView_ItemClick(object sender, ItemClickEventArgs e)
{
}
}
}
[GenericFileBrowser.xaml]
<Page
x:Class="Files.GenericFileBrowser"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:controls="using:Microsoft.Toolkit.Uwp.UI.Controls"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="using:Files"
mc:Ignorable="d" ScrollViewer.HorizontalScrollBarVisibility="Hidden" ScrollViewer.VerticalScrollBarVisibility="Auto">
<Page.Resources>
<AcrylicBrush x:Key="RegAcrylic" BackgroundSource="HostBackdrop" TintColor="White" TintOpacity="0.7" FallbackColor="{StaticResource SystemChromeMediumColor}"/>
<AcrylicBrush x:Key="InAppAcrylic" BackgroundSource="Backdrop" TintColor="#FF16B7E8" TintOpacity="0.6" FallbackColor="{StaticResource SystemChromeHighColor}"/>
<AcrylicBrush x:Key="LightAcrylic" BackgroundSource="HostBackdrop" TintColor="White" TintOpacity="0.8" FallbackColor="{StaticResource SystemChromeMediumColor}"/>
<Storyboard x:Name="PointerHoverButton1">
<FadeOutThemeAnimation Storyboard.TargetName="Shadow1"/>
</Storyboard>
</Page.Resources>
<Grid>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup>
<VisualState>
<VisualState.StateTriggers>
<!--VisualState to be triggered when window width is >=0 effective pixels.-->
<AdaptiveTrigger MinWindowHeight="0"/>
</VisualState.StateTriggers>
<VisualState.Setters>
</VisualState.Setters>
</VisualState>
<VisualState>
<VisualState.StateTriggers>
<AdaptiveTrigger MinWindowHeight="1080"/>
</VisualState.StateTriggers>
<VisualState.Setters>
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<ScrollViewer Margin="320,0,0,0" HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Auto">
<Grid Background="White">
<controls:ScrollHeader Mode="Sticky" HorizontalAlignment="Stretch" Height="240" VerticalAlignment="Top" FontFamily="Segoe UI Black" FontWeight="Bold" HorizontalContentAlignment="Stretch" FontSize="48">
<Grid HorizontalAlignment="Stretch">
<TextBlock Text=""/>
<TextBlock x:Name="VisiblePath" Text="" Margin="50,150,0,0" FontFamily="Segoe UI Black" FontWeight="Bold" FontSize="48"></TextBlock>
</Grid>
</controls:ScrollHeader>
<Grid Padding="50,250,50,25">
<StackPanel Orientation="Vertical">
<ListView x:Name="FolderView" SelectionMode="Single" IsItemClickEnabled="False" SelectionChanged="FolderView_ItemClick" Background="{StaticResource LightAcrylic}" ItemsSource="{x:Bind ViewModel.FolInfoList}" Margin="0,0,1500,0" VerticalAlignment="Top" HorizontalAlignment="Center">
<ListView.ItemTemplate>
<DataTemplate x:DataType="local:FileLoader">
<Grid Background="{StaticResource LightAcrylic}" Width="1050" Height="45" VerticalAlignment="Center" BorderBrush="White" BorderThickness="0,0,0,0.5">
<Grid.ColumnDefinitions>
<ColumnDefinition></ColumnDefinition>
<ColumnDefinition></ColumnDefinition>
<ColumnDefinition></ColumnDefinition>
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0" Text="{x:Bind Name}" HorizontalAlignment="Left" Margin="0,0,0,0" VerticalAlignment="Center"></TextBlock>
<TextBlock Grid.Column="1" Text="{x:Bind Date}" HorizontalAlignment="Center" Margin="0,0,0,0" VerticalAlignment="Center"></TextBlock>
<TextBlock Grid.Column="2" Text="Folder" HorizontalAlignment="Right" Margin="0,0,0,0" VerticalAlignment="Center"></TextBlock>
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
<ListView x:Name="FileView" ItemClick="FileView_ItemClick" Background="{StaticResource LightAcrylic}" ItemsSource="{x:Bind ViewModel.InfoList}" Margin="0,0,1500,0" VerticalAlignment="Top">
<ListView.ItemTemplate>
<DataTemplate x:DataType="local:FileLoader">
<Grid Background="{StaticResource LightAcrylic}" Width="1050" Height="45" VerticalAlignment="Center">
<Grid.ColumnDefinitions>
<ColumnDefinition></ColumnDefinition>
<ColumnDefinition></ColumnDefinition>
<ColumnDefinition></ColumnDefinition>
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0" Text="{x:Bind Name}" HorizontalAlignment="Left" Margin="0,0,0,0" VerticalAlignment="Center"></TextBlock>
<TextBlock Grid.Column="1" Text="{x:Bind Date}" HorizontalAlignment="Center" Margin="0,0,0,0" VerticalAlignment="Center"></TextBlock>
<TextBlock Grid.Column="2" Text="{x:Bind Type}" HorizontalAlignment="Right" Margin="0,0,0,0" VerticalAlignment="Center"></TextBlock>
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</StackPanel>
</Grid>
<TextBlock x:Name="importDiag" HorizontalAlignment="Left" Margin="140,845,0,215" Text="TextBlock" TextWrapping="Wrap" Width="612"/>
</Grid>
</ScrollViewer>
<RelativePanel>
<Grid Background="{StaticResource RegAcrylic}" Height="1080" Width="320">
<NavigationView SelectionChanged="navView_ItemInvoked" IsPaneToggleButtonVisible="false" IsSettingsVisible="False" x:Name="navView" VerticalContentAlignment="Top" HorizontalContentAlignment="Stretch" IsPaneOpen="True" CompactModeThresholdWidth="560" ExpandedModeThresholdWidth="0" HorizontalAlignment="Stretch" Background="#FFF2F2F2" UseLayoutRounding="True" Margin="0,160,0,0">
<NavigationView.MenuItems>
<NavigationViewItem x:Name="homeIc" Margin="30,0,0,0" Content="Home" FontFamily="Segoe UI">
<NavigationViewItem.Icon>
<FontIcon Glyph="" FontFamily="Segoe MDL2 Assets"></FontIcon>
</NavigationViewItem.Icon>
</NavigationViewItem>
<NavigationViewItem Content="Desktop" x:Name="DesktopIC" IsSelected="True" FontFamily="Segoe UI" Margin="30,0,0,0">
<NavigationViewItem.Icon>
<FontIcon Glyph="" FontFamily="Segoe MDL2 Assets"></FontIcon>
</NavigationViewItem.Icon>
</NavigationViewItem>
<NavigationViewItem Content="Downloads" FontFamily="Segoe UI" Margin="30,0,0,0">
<NavigationViewItem.Icon>
<FontIcon Glyph="" FontFamily="Segoe MDL2 Assets"></FontIcon>
</NavigationViewItem.Icon>
</NavigationViewItem>
<NavigationViewItem Content="Documents" FontFamily="Segoe UI" Margin="30,0,0,0">
<NavigationViewItem.Icon>
<FontIcon Glyph="" FontFamily="Segoe MDL2 Assets"></FontIcon>
</NavigationViewItem.Icon>
</NavigationViewItem>
<NavigationViewItem Content="Pictures" FontFamily="Segoe UI" Margin="30,0,0,0">
<NavigationViewItem.Icon>
<FontIcon Glyph="" FontFamily="Segoe MDL2 Assets"></FontIcon>
</NavigationViewItem.Icon>
</NavigationViewItem>
<NavigationViewItem Content="Music" FontFamily="Segoe UI" Margin="30,0,0,0">
<NavigationViewItem.Icon>
<FontIcon Glyph="" FontFamily="Segoe MDL2 Assets"></FontIcon>
</NavigationViewItem.Icon>
</NavigationViewItem>
<NavigationViewItem Content="Videos" FontFamily="Segoe UI" Margin="30,0,0,0">
<NavigationViewItem.Icon>
<FontIcon Glyph="" FontFamily="Segoe MDL2 Assets"></FontIcon>
</NavigationViewItem.Icon>
</NavigationViewItem>
<NavigationViewItemHeader Content="DRIVES" Margin="30,15,0,0" FontFamily="Segoe UI Semibold" FontSize="8"></NavigationViewItemHeader>
<NavigationViewItem Content="Local Disk" FontFamily="Segoe UI" Margin="30,0,0,0">
<NavigationViewItem.Icon>
<FontIcon Glyph="" FontFamily="Segoe MDL2 Assets"></FontIcon>
</NavigationViewItem.Icon>
</NavigationViewItem>
</NavigationView.MenuItems>
</NavigationView>
<TextBlock HorizontalAlignment="Left" Margin="45,121,0,0" Text="Files" TextWrapping="Wrap" VerticalAlignment="Top" FontFamily="Segoe UI Black" FontSize="20" FontWeight="Bold"/>
</Grid>
</RelativePanel>
</Grid>
</Page>