Question

当我从UWP Community Toolkit轮播控件中按下图像时，我试图选择该项。

以下是我的xaml：

<Page.Resources>
    <DataTemplate x:Key="photos">
        <Grid Background="White" BorderBrush="Black" BorderThickness="1">
            <Image Source="{Binding CItem}" Width="300" Height="300" Stretch="UniformToFill" HorizontalAlignment="Center" VerticalAlignment="Center" />
        </Grid>
    </DataTemplate>
</Page.Resources>


  <Grid  Row="1" Grid.RowSpan="2" Grid.Column="2" Grid.ColumnSpan="2" Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
            <TextBlock x:Name="tblTitle" HorizontalAlignment="Center" Margin="0,0,0,0" TextWrapping="Wrap" Text="Swipe to fond your Template" VerticalAlignment="Top" FontWeight="Bold" />
            <Border Margin="0,0,0,0">
                <Custom:Carousel x:Name="CaroTest" InvertPositive="True" ItemDepth="300" KeyDown="Go_KeyDown" ItemMargin="19" ItemRotationX="43" ItemRotationY="65" ItemRotationZ="42" Orientation="Horizontal" ItemTemplate="{StaticResource photos}" SelectedIndex="2" SelectionChanged="CaroTest_SelectionChanged" >
                    <Custom:Carousel.EasingFunction>
                        <CubicEase EasingMode="EaseOut" />
                    </Custom:Carousel.EasingFunction>
                </Custom:Carousel>
            </Border>
        </Grid>

下面是我的事件处理程序代码：

  private void CaroTest_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {

        CaroItem lbi = ((sender as CaroItem).CItem as CaroItem);
        var result1 = " You selected " + lbi.CItem.ToString() + ".";

        var result = CaroTest.SelectedIndex.ToString();

    }

我遇到以下错误：

严重性代码描述项目文件行抑制状态错误CS0039无法通过引用转换，装箱转换，拆箱转换，换行转换或空类型转换EMRTest1 C：\ Projects2018 \ EMRTest1 \ EMRTest1 \ Views \ MainPage.xaml将类型'string'转换为'EMRTest1.Views.CaroItem'。 cs 217有效

Selection Changed事件中的以下代码解决了该问题：

///Identifies which Carousel Item is selected
        CaroItem item = (CaroTest.SelectedItem as CaroItem);
        tblTitle.Text = item.CItem.ToString();

UWP轮播SelectionChanged获取项目

0 个答案: