动态更改ListView项绑定

本文关键字：绑定 ListView 动态 | 更新日期: 2023-09-27 18:22:03

我正在用Visual Studio 2015为应用商店制作Windows 8.1。我有带GridView的ListView，它运行得很好。在某些列中有TextBlock，它的Text是Bind，但我想在选中单选按钮上用不同的字段更改绑定。下面是我的代码。

<ListView Name="lvData" Margin="5,0" HorizontalAlignment="Stretch" Grid.Row="2" BorderBrush="Black" 
                                    BorderThickness="1" Foreground="#000" VerticalAlignment="Center">
                    <ListView.HeaderTemplate>
                        <DataTemplate>
                            <Grid>
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition />
                                    <ColumnDefinition />
                                    <ColumnDefinition />
                                    <ColumnDefinition />
                                </Grid.ColumnDefinitions>
                                <GridViewHeaderItem Grid.Column="0" x:Uid="Number" Style="{StaticResource GridViewHeader}" />
                                <GridViewHeaderItem Grid.Column="1" x:Uid="_Dept" Style="{StaticResource GridViewHeader}" />
                                <GridViewHeaderItem Grid.Column="2" x:Uid="Arr" Style="{StaticResource GridViewHeader}" />
                                <GridViewHeaderItem Grid.Column="3" x:Uid="CurrentStatus" Style="{StaticResource GridViewHeader}" />
                            </Grid>
                        </DataTemplate>
                    </ListView.HeaderTemplate>
                    <ListView.ItemContainerStyle>
                        <Style TargetType="ListViewItem">
                            <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
                        </Style>
                    </ListView.ItemContainerStyle>
                    <ListView.ItemTemplate>
                        <DataTemplate>
                            <Grid>
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition />
                                    <ColumnDefinition />
                                    <ColumnDefinition />
                                    <ColumnDefinition />
                                </Grid.ColumnDefinitions>
                                <GridViewItem Grid.Column="0" Style="{StaticResource GridViewItem}" Content="{Binding Number}"/>
                                <GridViewItem Grid.Column="1" Style="{StaticResource GridViewItem}">
                                    <StackPanel>
                                        <TextBlock x:Name="DepTime" Text="{Binding DeptTime}" TextWrapping="Wrap" MaxWidth="65"/>
                                        <TextBlock Text="" TextWrapping="Wrap"/>
                                        <TextBlock x:Uid="Actual" TextWrapping="Wrap" MaxWidth="65" HorizontalAlignment="Center"/>
                                        <TextBlock Text="{Binding DeptStn}" Foreground="SkyBlue" TextWrapping="Wrap" MaxWidth="65" HorizontalAlignment="Center"/>
                                    </StackPanel>
                                </GridViewItem>
                                <GridViewItem Grid.Column="2" Style="{StaticResource GridViewItem}">
                                    <StackPanel>
                                        <TextBlock x:Name="ArrTime" Text="{Binding ArrTime}" TextWrapping="Wrap" MaxWidth="65"/>
                                        <TextBlock Text="" TextWrapping="Wrap"/>
                                        <TextBlock x:Uid="Actual" TextWrapping="Wrap" MaxWidth="65" HorizontalAlignment="Center"/>
                                        <TextBlock Text="{Binding ArrivCode}" Foreground="SkyBlue" TextWrapping="Wrap" MaxWidth="65" HorizontalAlignment="Center"/>
                                    </StackPanel>
                                </GridViewItem>
                                <GridViewItem Grid.Column="3" Style="{StaticResource GridViewItem}" Foreground="{Binding Color}" >
                                    <TextBlock Text="{Binding CurrentStatus}" TextWrapping="Wrap" MaxWidth="60" HorizontalAlignment="Center"/>
                                </GridViewItem>
                            </Grid>
                        </DataTemplate>
                    </ListView.ItemTemplate>
                </ListView>

在上面的代码中，列索引1和2有TextBlock文本绑定，我想在单选按钮检查事件时更改它。

动态更改ListView项绑定

我走错了方向，@Romasz给出的保持可见的逻辑是绝对正确的，但我仍然走错了从代码后面访问控件的道路。但它不能从代码背后访问，因为它在DataTemplate下。

因此，我创建了布尔值IValueConverter，如下所示

public class BooleanToVisibilityConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, string language)
        {
            if ((bool)value)
                return Visibility.Visible;
            else
                return Visibility.Collapsed;
        }
        public object ConvertBack(object value, Type targetType, object parameter, string language)
        {
            throw new NotImplementedException();
        }
    }

然后我在页面中添加了以下内容。资源

<BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"/>

然后在实际的TextBlock 中

<TextBlock x:Name="DepTime" Text="{Binding Time}" TextWrapping="Wrap" MaxWidth="65" Visibility="{Binding ElementName=LocalTime, Path=IsChecked, Converter={StaticResource BooleanToVisibilityConverter}}"/>

在上面的ElementName=LocalTime，因为我的单选按钮名称是LocalTime

希望它能帮助

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