Question

尝试使用转换器时出现XamlParseException。我怀疑我在转换器中犯了一个错误，但无法抓住它。

完整错误文字：

类型的第一次机会异常   'System.Windows.Markup.XamlParseException'发生在   System.Windows.ni.dll

其他信息：无法创建类型实例   'app.Converters.DimensionToText'[行：21位置：42]

namespace app.Converters
{
    class DimensionToText : IValueConverter
    {
        public object Convert(object value, Type targetType,
            object parameter, CultureInfo culture)
        {
            Dimensions dim = (Dimensions) value;
            //bool param = (bool) parameter;
            return dim.width.ToString().Trim() + "\"x " + dim.length.ToString().Trim() + "\"x " + dim.height.ToString().Trim() + "\"";
        }

        public object ConvertBack(object value, Type targetType,
                object parameter, CultureInfo culture)
        {
            return value;
        }
    }
}

XAML部分：

xmlns:converter="clr-namespace:app.Converters"
...
<phone:PhoneApplicationPage.Resources>
    <converter:DimensionToText x:Key="DimensionToText"/>
</phone:PhoneApplicationPage.Resources>
...
<TextBlock Style="{StaticResource PhoneTextNormalStyle}"> 
    <Run Text="Dimensions:"/>
    <Run Text="{Binding information.dimensions, Converter={StaticResource DimensionToText}}"/>
</TextBlock>

奇怪的是设计时间转换器工作得很好。任何建议赞赏

Answer 1

制作转换器public

namespace app.Converters
{
    public class DimensionToText : IValueConverter
    {
        public object Convert(object value, Type targetType,
            object parameter, CultureInfo culture)
        {
            Dimensions dim = (Dimensions) value;
            //bool param = (bool) parameter;
            return dim.width.ToString().Trim() + "\"x " + dim.length.ToString().Trim() + "\"x " + dim.height.ToString().Trim() + "\"";
        }

        public object ConvertBack(object value, Type targetType,
                object parameter, CultureInfo culture)
        {
            return value;
        }
    }
}

使用转换器时XamlParseException

1 个答案: