[英]TreeView ItemsSource MVVM Binding
我有一個默認的treeviewitem的TreeView,另一個具有動態值。 但是我沒有那個TreeViewItem的名稱,而是擁有: https : //gyazo.com/00563993faf7f5d59bb8ab6870fd428d
整行是:“ MyWindowsMediaPlayer.Model.PlaylistDB”
XAML:
<TreeView Grid.Row="0" Grid.Column="0" HorizontalAlignment="Left" VerticalAlignment="Top" Width="135">
<TreeViewItem Header="Bibliotheque" IsExpanded="True">
<TreeViewItem Header="Mes Musiques" IsSelected="True"></TreeViewItem>
<TreeViewItem Header="Mes Videos"></TreeViewItem>
<TreeViewItem Header="Mes Images"></TreeViewItem>
</TreeViewItem>
<TreeViewItem Header="Lecteur"></TreeViewItem>
<TreeViewItem Header="Playlist" ItemsSource="{Binding ItemSourceTree}">
</TreeViewItem>
</TreeView>
CS:
private ObservableCollection<PlaylistDB> _itemSourceTree;
public ObservableCollection<PlaylistDB> ItemSourceTree
{
get { return this._itemSourceTree; }
set
{
this._itemSourceTree = value;
this.OnPropertyChanged("ItemSourceTree");
}
}
並在初始化時:
this.ItemSourceTree.Add(new PlaylistDB() { NamePlaylist = "I'm a test" });
this.ItemSourceTree.Add(new PlaylistDB() { NamePlaylist = "I'm a test 2 " });
您的樹形視圖不知道如何顯示PlaylistDB對象。
像這樣重寫PlaylistDB的ToString()方法:
public override string ToString()
{
return "NameOfElement";
}
您也可以按照以下說明編輯TreeView資源: http : //www.wpf-tutorial.com/treeview-control/treeview-data-binding-multiple-templates/
您必須在TreeView
資源下定義DataTemplate
,以定義UI如何呈現TreeViewItem的綁定ViewModel的模板。
<DataTemplate DataType="{x:Type local:PlaylistDB}">
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding NamePlaylist }" />
</StackPanel>
</DataTemplate>
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