在ListBox項目和WPF中的網格單元之間拖放？

Question

有一個列表框，其中包含一些項目。還有一個3x3矩陣的網格。用戶將拖動一個項目並放置一個網格單元格。

我發現的大多數樣本都是關於從一個列表框拖放到另一個列表框的。但我想放入一個網格單元。我怎樣才能做到這一點？

請指教。感謝 PJ

Answer 1

請，檢查下面的例子會爲你工作：

XAML：

<Grid> 
    <ListBox Height="100" HorizontalAlignment="Left" Margin="56,65,0,0" 
      Name="listBox1" VerticalAlignment="Top" Width="120" 
      PreviewMouseLeftButtonDown="listBox1_PreviewMouseLeftButtonDown"> 
     <ListBoxItem Content="one" /> 
     <ListBoxItem Content="two" /> 
     <ListBoxItem Content="three" /> 
    </ListBox> 
    <Grid Height="100" HorizontalAlignment="Left" Margin="238,65,0,0" Name="grid1" 
      VerticalAlignment="Top" Width="200" ShowGridLines="True" TextBlock.Drop="grid1_Drop"> 
     <Grid.RowDefinitions> 
      <RowDefinition /> 
      <RowDefinition /> 
     </Grid.RowDefinitions> 
     <Grid.ColumnDefinitions> 
      <ColumnDefinition /> 
      <ColumnDefinition /> 
     </Grid.ColumnDefinitions> 

     <TextBlock Grid.Row="0" Grid.Column="0" AllowDrop="True"></TextBlock> 
     <TextBlock Grid.Row="0" Grid.Column="1" AllowDrop="True"></TextBlock> 
     <TextBlock Grid.Row="1" Grid.Column="0" AllowDrop="True"></TextBlock> 
     <TextBlock Grid.Row="1" Grid.Column="1" AllowDrop="True"></TextBlock> 

    </Grid> 
</Grid> 

代碼：

public partial class MainWindow : Window 
{ 
    public MainWindow() 
    { 
     InitializeComponent(); 
    } 

    private void listBox1_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e) 
    { 
     object item = listBox1.SelectedItem; 
     if (item != null) 
      DragDrop.DoDragDrop(listBox1, item, DragDropEffects.Move); 
    } 

    private void grid1_Drop(object sender, RoutedEventArgs e) 
    { 
     TextBlock textBlock = e.Source as TextBlock; 
     Console.WriteLine("drop item into grid column:{0} row:{1}", 
      Grid.GetColumn(textBlock), Grid.GetRow(textBlock)); 

     DataObject item = (((DragEventArgs)e).Data) as DataObject; 
     ListBoxItem listItem = item.GetData(typeof(ListBoxItem)) as ListBoxItem; 
     textBlock.Text = listItem.Content.ToString(); 
    } 
} 

希望這會有所幫助，至於