Xamarin.Forms StackLayout，在DataTemplate中找不到x:Name

Question

XAML 文件如下所示：

<?xml version="1.0" encoding="utf-8"?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="WPapp.Views.Home"
x:Name="HomeHeader">
<ContentPage.ToolbarItems> 
<ToolbarItem Text="Refresh"
x:Name="refreshButton"
Clicked="refreshButton_Clicked"/>
</ContentPage.ToolbarItems>
<ContentPage.Content>
<ScrollView>
<StackLayout Margin="10"
HorizontalOptions="Center"
VerticalOptions="FillAndExpand"
x:Name="HomeContainer">
<Label Text="Featured Posts"
FontSize="Title"
FontAttributes="Bold"
Margin="0, 20, 10, 0"/>
<CarouselView>
<CarouselView.ItemTemplate>
<DataTemplate>
<StackLayout x:Name="FeaturedContainer"/>
</DataTemplate>
</CarouselView.ItemTemplate>
</CarouselView>
</StackLayout>
</ScrollView>
</ContentPage.Content>
</ContentPage>

使用 c# 文件中的这一行，

FeaturedContainer.Children.Clear();

我收到以下错误：

错误 CS0103：当前上下文中不存在名称"特色容器" (CS0103(

我做错了什么？

Answer 1

您可以通过将名称添加到以下位置来获取当前项目：

<CarouselView x:Name="myCarouselView">

然后获取当前可见的堆栈布局：

private void Button_Clicked(object sender, EventArgs e)
{
ObservableCollection<View> views = myCarouselView.VisibleViews;
StackLayout st = views[0] as StackLayout;
st.Children.Clear();
//or
StackLayout st1 = myCarouselView.CurrentItem as StackLayout;
st1.Children.Clear();
}

更新：

通过 C# 在轮播视图中添加多个堆栈布局

public partial class MainPage : ContentPage
{
public MainPage()
{
InitializeComponent();
CarouselView carouselView = new CarouselView
{
ItemsLayout = (LinearItemsLayout)LinearItemsLayout.Horizontal
};
carouselView.ItemTemplate = new DataTemplate(typeof(CustomCell));
carouselView.ItemsSource = new string[]
{
"Baboon",
"Capuchin Monkey",
"Blue Monkey",
"Squirrel Monkey",
"Golden Lion Tamarin",
"Howler Monkey",
"Japanese Macaque"
};
Content = carouselView;
}
}
public class CustomCell : ContentView
{
public CustomCell()
{
//instantiate each of our views
var image = new Image();
StackLayout cellWrapper = new StackLayout();
StackLayout horizontalLayout = new StackLayout();
Label left = new Label();
Label right = new Label();
//set bindings
left.Text = "title";
right.Text = "title";
//Set properties for desired design
cellWrapper.BackgroundColor = Color.FromHex("#eee");
horizontalLayout.Orientation = StackOrientation.Horizontal;
right.HorizontalOptions = LayoutOptions.EndAndExpand;
left.TextColor = Color.FromHex("#f35e20");
right.TextColor = Color.FromHex("503026");
//add views to the view hierarchy
horizontalLayout.Children.Add(image);
horizontalLayout.Children.Add(left);
horizontalLayout.Children.Add(right);
cellWrapper.Children.Add(horizontalLayout);
this.Content = cellWrapper;
}
}