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Vladimir
Asked:2020-07-11 20:54:19 +0800 CST2020-07-11 20:54:19 +0800 CST

转换器的问题

  • 772

问题是转换器不想在ResourceDictionary(ListBox.xaml)中工作，如果它包含在App.xaml中，只有当你直接将它连接到ListBox.xaml <converters:BoolToStringConverter x:Key="BoolToString" />一切都会变好。

错误：异常：找不到名为“BoolToString”的资源。资源名称区分大小写。

我真正想要得到的是：是否有可能以某种方式从App.xaml到ListBox.xaml获得转换器，这 不是仅在ListBox.xaml中使用的选项。

列表框.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:converters="clr-namespace:PriceCreator.Services.Converters"
                    >
    <converters:BoolToStringConverter   x:Key="BoolToString" />
    <ControlTemplate x:Key="VideoListItems" TargetType="ListBoxItem">

        <Grid>
            <Border   
                Name="brd"
                Margin="10,2"
                Background="{StaticResource MediumBrush}"
                CornerRadius="2">
                <Grid  >
                    <Grid.RowDefinitions>
                        <RowDefinition Height="25*"/>
                        <RowDefinition Height="22*"/>
                        <RowDefinition Height="26*"/>
                        <RowDefinition Height="818*"/>
                    </Grid.RowDefinitions>
                    <TextBlock x:Name="Name"  FontWeight="Bold" Foreground="Gray"   Style="{StaticResource BaseText}" FontSize="18"
                           Margin="5" TextTrimming="CharacterEllipsis"  Text="{Binding  Name,StringFormat=Имя товара:{0}}" TextAlignment="Center"  VerticalAlignment="Center"/>
                    <Grid Grid.Row="1">
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="142*"/>
                            <ColumnDefinition Width="38*"/>
                            <ColumnDefinition Width="229*"/>
                            <ColumnDefinition Width="365*"/>
                        </Grid.ColumnDefinitions>
                        <TextBlock    Margin="2" x:Name="Price"  Grid.Column="0"  Text="{Binding Price,StringFormat=Цена:{0}}"   FontWeight="Bold" Foreground="Gray"   Style="{StaticResource BaseText}" FontSize="18" VerticalAlignment="Center" HorizontalAlignment="Right" />
                        <TextBlock    Margin="2" x:Name="CurrencyId" Grid.Column="1"  Text="{Binding CurrencyId}"   FontWeight="Bold" Foreground="Gray"   Style="{StaticResource BaseText}" FontSize="18" VerticalAlignment="Center" />
                        <TextBlock    FontWeight="Bold" Foreground="Gray"   Style="{StaticResource BaseText}"  Margin="2" x:Name="Stock_quantity" Grid.Column="2"  Text="{Binding Stock_quantity,StringFormat=Количество товаров:{0}}" FontSize="18" VerticalAlignment="Center"  />
                        <TextBlock    TextTrimming="CharacterEllipsis" FontWeight="Bold" Foreground="Gray"   Style="{StaticResource BaseText}"  Margin="2" x:Name="Vendor" Grid.Column="3"  Text="{Binding Vendor,StringFormat=Производитель товара:{0}}"     FontSize="18" VerticalAlignment="Center"/>
                    </Grid>
                    <Grid Grid.Row="2">
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="251*"/>
                            <ColumnDefinition Width="523*"/>
                        </Grid.ColumnDefinitions>
                        <TextBlock Style="{StaticResource BaseText}" Margin="2" Text="{Binding Available,StringFormat=Есть товар в наличии:{0},Converter={StaticResource BoolToString}}" FontSize="18" FontWeight="Bold"  Foreground="Gray"  />
                    </Grid>


                </Grid>
            </Border>

            <!--<Polygon
                Name="triangle"
                Margin="2"
                HorizontalAlignment="Left"
                VerticalAlignment="Center"
                Fill="{Binding ElementName=brd, Path=Background}"
                Points="0,0 20,15, 0,30"
                Visibility="Hidden" />-->
        </Grid>


        <ControlTemplate.Triggers>
            <Trigger Property="IsSelected" Value="true">
                <Setter TargetName="brd" Property="Background" Value="{StaticResource BrushBlue}" />
                <!--<Setter TargetName="triangle" Property="Visibility" Value="Visible" />-->
                <Setter TargetName="Name" Property="Foreground" Value="White" />
                <Setter TargetName="Price" Property="Foreground" Value="White" />
                <Setter TargetName="CurrencyId" Property="Foreground" Value="White" />
                <Setter TargetName="Vendor" Property="Foreground" Value="White" />
                <Setter TargetName="Stock_quantity" Property="Foreground" Value="White" />
                <!--<Setter TargetName="Id" Property="Foreground" Value="White" />-->
            </Trigger>

            <Trigger Property="IsMouseOver" Value="true">
                <Setter TargetName="brd" Property="Background" Value="{StaticResource BrushBlue}" />
                <Setter TargetName="Name" Property="Foreground" Value="White" />
                <Setter TargetName="Price" Property="Foreground" Value="White" />
                <Setter TargetName="CurrencyId" Property="Foreground" Value="White" />
                <Setter TargetName="Vendor" Property="Foreground" Value="White" />
                <Setter TargetName="Stock_quantity" Property="Foreground" Value="White" />
                <!--<Setter TargetName="Id" Property="Foreground" Value="White" />-->
            </Trigger>
        </ControlTemplate.Triggers>
    </ControlTemplate>
</ResourceDictionary>

应用程序.xaml

<Application x:Class="PriceCreator.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:converters="clr-namespace:PriceCreator.Services.Converters"
             StartupUri="Views\PriceCeatorView.xaml">
    <Application.Resources>
        <!--Подключение ресурсов-->
        <ResourceDictionary >
         <!--Подключение конвертеров-->
         <converters:StringTointConverter x:Key="StringToint" />
         <converters:IntToVisibilityConverter x:Key="IntToVisibility" />
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="Styles\Colors.xaml"/>
                <ResourceDictionary Source="Styles\Fonts.xaml"/>
                <!--<ResourceDictionary Source="Styles\Icons.xaml" />-->
                <ResourceDictionary Source="Styles\ScrollViewer.xaml" />
                <ResourceDictionary Source="Styles\Texts.xaml" />
                <ResourceDictionary Source="Styles\Buttons.xaml" />
                <!--<ResourceDictionary Source="Styles\RadioButton.xaml" />-->
                <!--<ResourceDictionary Source="Styles\ContentControls.xaml" />
                <ResourceDictionary Source="Styles\UserControl.xaml" />-->
                <ResourceDictionary Source="Styles\ListBox.xaml" />

            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>
</Application>
wpf

1 个回答

  1. Best Answer

    转换器连接xmlns:converters="clrnamespace:PriceCreator.Services.Converters"- 我在 Services 文件夹中有一个 Converters 文件夹。

    创建转换器的基类：

     abstract class ConverterBase : MarkupExtension, IValueConverter
 {
            public abstract object Convert(object value, Type targetType, object parameter, CultureInfo culture);
            public virtual object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)=> throw new NotImplementedException();
            public override object ProvideValue(IServiceProvider serviceProvider) => this;
 }

    从 Bool 到 String 的示例转换器：

    class BoolToStringConverter : ConverterBase
{
      
        public override object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            bool v = System.Convert.ToBoolean(value);
            return v ? "Да" : "Нет";
        }
}

    使用数据类型的一个示例是 Bool(Available)。

    <TextBlock x:Name="Available"  Margin="2"  Grid.Column="1" Style="{StaticResource BaseText}"  Text="{Binding Available,StringFormat=Есть товар в наличии:{0},Converter={converters:BoolToStringConverter}}" FontSize="18" FontWeight="Bold"  Foreground="Gray"  />
    • 0

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