使用 ConverterParameter 进行 UWP 多重绑定

Question

我有以下 XAML 代码，其中我将一些数据绑定到列表视图。另外，我有非常重要的RecipientConverter，它允许我转换我的 TextBlock。但是，这就是问题所在。此 TextBlock 必须根据以下 TextBlock 中呈现的形式进行转换器（Binding Path=Sum）。 所以，这是我的问题，是否可以将“Sum”TextBlock 作为 ConverterParameter 发送到RecipientConverter？我知道MultipleBinding，但这仅适用于 WPF，在 UWP 中不可用。也许这是用DependencyProperty 实现它的一种方式，但我对此很确定。

注意： “Recipient” TextBlock 和“Sum” TextBlock 是我从服务器获取的动态值。

<ListView x:Name="HistoryList" Padding="10" IsItemClickEnabled="True" Visibility="Collapsed" ItemsSource="{Binding Source={StaticResource TransactionsCVS}}" ItemsPanel="{StaticResource ResourceKey=ItemsPanelTemplate}" ItemClick="HistoryList_ItemClick">
                    <ListView.GroupStyle>
                        <GroupStyle>
                            <GroupStyle.HeaderTemplate>
                                <DataTemplate x:DataType="data:TransactionGroupInfo">
                                    <TextBlock FontWeight="Medium" FontSize="16" Foreground="#999999"  Text="{Binding Path=Key}" />
                                </DataTemplate>
                            </GroupStyle.HeaderTemplate>
                        </GroupStyle>
                    </ListView.GroupStyle>
                    <ListView.ItemTemplate>
                        <DataTemplate x:DataType="data:Transaction">
                            <Grid Height="60" Margin="0,5,0,5" Background="White" CornerRadius="5">
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition Width="5" />
                                    <ColumnDefinition Width="*" />
                                    <ColumnDefinition Width="Auto" />
                                </Grid.ColumnDefinitions>
                                <StackPanel Background="{Binding Path=VendorAccentColor}" CornerRadius="5,0,0,5" />
                                <StackPanel VerticalAlignment="Center" Margin="10,0,0,0" Grid.Column="1" Orientation="Vertical">
                                    <TextBlock Text="{Binding Path=VendorName}" FontSize="16" Foreground="#999999" />
                                    <TextBlock Text="{Binding Path=Recipient, Converter={StaticResource RecipientConverter}}" FontSize="16" Foreground="#999999" />
                                </StackPanel>
                                <TextBlock Grid.Column="2" Text="{Binding Path=Sum, Converter={StaticResource SumConverter}}" VerticalAlignment="Center" Canvas.ZIndex="2" Margin="0,0,10,0" FontSize="18" FontWeight="Bold" />
                            </Grid>
                        </DataTemplate>
                    </ListView.ItemTemplate>
                </ListView>

这是我的转换器的 C# 代码

public object Convert(object value, Type targetType, object parameter, string language)
    {
        string recipient = (string)value;
        // Here is a way I want it to be
        string sum = (string)parameter;

        if (HalykWallet_v03.Model.AppSettings.GetAppLang() == "ru")
        {
            if (sum.Contains("-"))
                return "На " + recipient;
            else
                return "От " + recipient;
        }
        else
        {
            char[] array = sum.ToCharArray();
            if (sum.Contains("-"))
            {
                switch (array.Last())
                {
                    case '0':
                    case '1':
                    case '2':
                        recipient += recipient + "-ден";
                        break;
                    case '3':
                    case '4':
                    case '5':
                        recipient += recipient + "-тен";
                        break;
                    case '6':
                        recipient += recipient + "-дан";
                        break;
                    case '7':
                    case '8':
                        recipient += recipient + "-ден";
                        break;
                    case '9':
                        recipient += recipient + "-дан";
                        break;
                    default:
                        break;
                }
            }
            else
            {
                switch (array.Last())
                {
                    case '0':
                    case '1':
                    case '2':
                        recipient += recipient + "-ге";
                        break;
                    case '3':
                    case '4':
                    case '5':
                        recipient += recipient + "-ке";
                        break;
                    case '6':
                        recipient += recipient + "-ға";
                        break;
                    case '7':
                    case '8':
                        recipient += recipient + "-ден";
                        break;
                    case '9':
                        recipient += recipient + "-ға";
                        break;
                }
            }

            return recipient;
        }
    }

Answer 1

您可以在转换器中使用依赖属性。This 应该会有所帮助。

Answer 2

绑定而不是 x:bind 解决了我的问题。也许这会节省某人的一天。 Here is the link

Answer 3

您好，您尝试将其绑定为转换器参数吗？

 <StackPanel VerticalAlignment="Center" Margin="10,0,0,0" Grid.Column="1" Orientation="Vertical">
  <TextBlock Text="{Binding Path=VendorName}" FontSize="16" Foreground="#999999" />
  <TextBlock Name="txtRecipient" Text="{Binding Path=Recipient, Converter={StaticResource RecipientConverter}}" FontSize="16" Foreground="#999999" />
</StackPanel>
<TextBlock Grid.Column="2" Text="{Binding Path=Sum, Converter={StaticResource SumConverter},ConverterParameter={Binding ElementName=txtrec}}" VerticalAlignment="Center" Canvas.ZIndex="2" Margin="0,0,10,0" FontSize="18" FontWeight="Bold" />

但是，您可以使用 Cimbalino Windows phone 工具包在 UWP 中模拟多重绑定。看看here