0
我有一個簡單的應用程序頁面和內容面板,我在內容面板中添加一個usercontrol。當我點擊一個按鈕來刪除它時,userControl的析構函數沒有執行。爲什麼?windows phone 8:當用戶控件從其父面板中移除時,不能放置用戶控件?
這裏是我的主網頁:
<Grid x:Name="LayoutRoot" Background="Transparent">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Button Grid.Row="0" Content="AddOrRemove" Click="Button_Click"/>
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
</Grid>
</Grid>
按鈕點擊事件是:
private void Button_Click(object sender, RoutedEventArgs e)
{
if (this.ContentPanel.Children.Count > 0)
{
this.ContentPanel.Children.Clear();
return;
}
page = new PromptPage();
this.ContentPanel.Children.Add(page);
}
PromptPage.xaml:
<Grid x:Name="LayoutRoot" Background="{StaticResource PhoneChromeBrush}">
<StackPanel>
<TextBlock Text="balabalaabcdefghijklmnop1"></TextBlock>
<TextBlock Text="balabalaabcdefghijklmnop2"></TextBlock>
<TextBlock Text="balabalaabcdefghijklmnop3"></TextBlock>
<TextBlock Text="balabalaabcdefghijklmnop4"></TextBlock>
<TextBlock Text="balabalaabcdefghijklmnop5"></TextBlock>
<TextBlock Text="balabalaabcdefghijklmnop6"></TextBlock>
<TextBlock Text="balabalaabcdefghijklmnop7"></TextBlock>
<TextBlock Text="balabalaabcdefghijklmnop8"></TextBlock>
<TextBlock Text="balabalaabcdefghijklmnop9"></TextBlock>
<TextBlock Text="balabalaabcdefghijklmnop10"></TextBlock>
<TextBlock Text="balabalaabcdefghijklmnop11"></TextBlock>
<TextBlock Text="balabalaabcdefghijklmnop12"></TextBlock>
<TextBlock Text="balabalaabcdefghijklmnop13"></TextBlock>
</StackPanel>
</Grid>
PromptPage.xaml.cs:
public PromptPage()
{
InitializeComponent();
}
~PromptPage()
{
System.Diagnostics.Debug.WriteLine("disposed!");
}