Xamarin Forms / XAML:未调用转换器

时间:2017-01-07 22:45:20

标签: c# xaml xamarin xamarin.forms

有人知道为什么只有第二个isvisible转换器被调用吗? 如果我更改了序列,则只调用新的第二个转换器 Converter1为DiaryTypeNahrungsaufnahmeToBoolConverter,converter2为DiaryTypeAuswirkungToBoolConverter

<ListView>
  <ListView.ItemTemplate>
    <DataTemplate>      
        <ViewCell>
            <RelativeLayout IsVisible="{Binding Type, Converter={StaticResource converter1}}"></RelativeLayout>
            <RelativeLayout IsVisible="{Binding Type, Converter={StaticResource converter2}}"></RelativeLayout>
        </ViewCell>
    </DataTemplate>
  </ListView.ItemTemplate>
</ListView>

转换器代码是:

public class DiaryTypeNahrungsaufnahmeToBoolConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        try
        {
            if (value is LibChemotherapie.DiaryType)
            {
                return ((LibChemotherapie.DiaryType)value) == LibChemotherapie.DiaryType.Food;
            }
            return false;
        }
        catch (Exception)
        {
            return false;
        }

    }

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

public class DiaryTypeAuswirkungToBoolConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        try
        {
            if (value is LibChemotherapie.DiaryType)
            {
                return ((LibChemotherapie.DiaryType)value) == LibChemotherapie.DiaryType.Effect;
            }
            return false;
        }
        catch (Exception)
        {
            return false;
        }
    }

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

感谢您的帮助。

1 个答案:

答案 0 :(得分:0)

根据杰森的暗示,它现在正在工作!我更改了xaml,因此ViewCell只包含一个视图。在那个视图中,我添加了两个相对布局和绑定属性。

str(dades$Edat)
 num [1:30000] 24 26 34 37 57 37 29 23 28 35 ...