Dobrý den,
V XAMLu mám toto:
<GridView x:Name="polozky" BorderBrush="Gray" BorderThickness="1" Height="Auto" Background="{StaticResource ApplicationPageBackgroundThemeBrush}"
ItemTemplate="{StaticResource StoreFrontTileTemplate}"
ItemContainerStyle="{StaticResource StoreFrontTileStyle}"
ItemsPanel="{StaticResource StoreFrontGridItemsPanelTemplate}"
VerticalAlignment="Stretch"
ScrollViewer.VerticalScrollBarVisibility="Visible"
ScrollViewer.HorizontalScrollBarVisibility="Auto" SelectionMode="Multiple" Margin="80,606,86,67"/>
Ve VB.NET pak toto:
Private Async Sub Add_Click_1(sender As Object, e As RoutedEventArgs)
Dim openfile As New FileOpenPicker
openfile.ViewMode = PickerViewMode.Thumbnail
openfile.SuggestedStartLocation = PickerLocationId.PicturesLibrary
openfile.FileTypeFilter.Add(".jpg")
openfile.FileTypeFilter.Add(".png")
openfile.FileTypeFilter.Add(".bmp")
Dim soubor As Windows.Storage.StorageFile = Await openfile.PickSingleFileAsync
pridejpolozku(soubor)
End Sub
Private Async Sub pridejpolozku(_soubor As Windows.Storage.StorageFile)
Dim nahled As Windows.Storage.FileProperties.StorageItemThumbnail = Await _soubor.GetThumbnailAsync(Windows.Storage.FileProperties.ThumbnailMode.PicturesView)
Dim bmp As New BitmapImage
bmp.SetSource(nahled)
Dim item As New Item
item.Image = bmp
polozky.Items.Add(item)
End Sub
Toto ale nezobrazí v GridView polozky ten náhled ale černý obrázek. Proč a jak docílit zobrazení náhledu?
