Question

我有以下按钮样式：

<Style TargetType="Button" 
           BasedOn="{StaticResource {x:Type Control}}">
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="BorderThickness" Value="0"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Button}">
                    <Border CornerRadius="4" Background="{TemplateBinding Background}">
                        <Grid>
                            <Path Data="{TemplateBinding Content}" Fill="White" />
                        </Grid>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

有一个Converter可将一些枚举值转换为所需的路径数据字符串：

public class SugarOperationEnumToSolidImageConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        var sugarOperationEnum = (SugarOperationEnum)value;

        switch (sugarOperationEnum)
        {
            case SugarOperationEnum.Increment:
                return CoffeeMachineIcons.PlusIcon;
            case SugarOperationEnum.Decrement:
                return CoffeeMachineIcons.MinusIcon;
        }

        throw new NotImplementedException();
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

和一个按钮：

<Button Style="{StaticResource SugarButtonStyle}"
                Content="{Binding DecrementSugarButtonContent, Converter={StaticResource SugarOperationEnumToSolidImageConverter}}"/>

由于某种原因，当我将其绑定到路径数据中时，按钮内容的TemplateBinding无法正常工作。

任何想法我该如何克服？

Answer 1

您应该使用Geometry.Parse绑定数据，因为数据是几何而不是字符串，所以您可以像这样修改转换器：

public class SugarOperationEnumToSolidImageConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        var sugarOperationEnum = (SugarOperationEnum)value;

        switch (sugarOperationEnum)
        {
            case SugarOperationEnum.Increment:
                return Geometry.Parse(CoffeeMachineIcons.PlusIcon);
            case SugarOperationEnum.Decrement:
                return Geometry.Parse(CoffeeMachineIcons.MinusIcon);
        }

        throw new NotImplementedException();
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

但是请考虑将路径存储为静态资源，而不是每次都对其进行解析。

Button的内容与Path的数据的TemplateBinding

1 个答案: