小编Res*_*Res的帖子

我有一堂课，以替代项目的背景颜色，但是如果删除项目，则背景颜色不会更新。删除项目后是否可以刷新背景颜色？

备用颜色的代码。类列表视图：

public class AlternatingRowListView : ListView
{
    protected override void PrepareContainerForItemOverride(DependencyObject element, object item)
    {
        base.PrepareContainerForItemOverride(element, item);
        var listViewItem = element as ListViewItem;
        if (listViewItem != null)
        {
            var index = IndexFromContainer(element);

            if (index % 2 == 0)
            {
                listViewItem.Background = new SolidColorBrush(Colors.LightBlue);
            }
            else
            {
                listViewItem.Background = new SolidColorBrush(Colors.Transparent);
            }
        }

    }
}

代码xaml：

<local:AlternatingRowListView x:Name="listview">
        <ListViewItem>item 1</ListViewItem>
        <ListViewItem>item 2</ListViewItem>
        <ListViewItem>item 3</ListViewItem>
        <ListViewItem>item 4</ListViewItem>
        <local:AlternatingRowListView.ItemTemplate>
            <DataTemplate>

            </DataTemplate>
        </local:AlternatingRowListView.ItemTemplate>
</local:AlternatingRowListView>

提前致谢。

我会删除列表视图项目中带有按钮的项目，并使用列表视图项目中的另一个按钮更改椭圆的颜色。

班级产品代码：

class Product
{
    public string Name { get; set; }
    public double Price { get; set; }
}

xaml 主页代码：

<Page
x:Class="ListViewTest.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:ListViewTest"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d" Loaded="Page_Loaded">

<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
    <ListView x:Name="ListViewProducts" 
            ScrollViewer.HorizontalScrollBarVisibility="Disabled" 
            ScrollViewer.VerticalScrollBarVisibility="Auto"
            FontSize="18" 
            BorderThickness="0" 
            Width="600" 
            Height="800" 
            HorizontalAlignment="Center"
            VerticalAlignment="Center"
            ItemsSource="{Binding LineItems}">
        <ListView.ItemTemplate>
            <DataTemplate>
                <StackPanel Margin="10">
                    <Grid HorizontalAlignment="Left" VerticalAlignment="Center" Margin="5,0,0,0">
                        <Ellipse x:Name="EllipseColor" HorizontalAlignment="Left" Height="20" Stroke="Black" VerticalAlignment="Top" Width="20" StrokeThickness="1"/>
                    </Grid>
                    <TextBlock Text="{Binding Name}" Margin="5,0,0,0"/>
                    <TextBlock Text="{Binding Price}" Margin="5,0,0,0"/>
                    <Button x:Name="btnRemove" Click="btnRemove_Click" Height="20" Width="60" Margin="5"/>
                    <Button x:Name="btnChangeColor" Click="btnChangeColor_Click" …

如何更改 CalendarView 中今天背景的颜色？

总是提前谢谢你..！