1. Create a class file HideIfEmptyValueConverter.cs and add following code:
namespace MyApp
{
class HideIfEmptyValueConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
try
{
if (value != null && (value is string) && (value as string).Length > 0)
return true;
else if (value != null && (value is IEnumerable<object>) && (value as IEnumerable<object>).Count() > 0)
return true;
else if (parameter != null && (parameter is string) && (parameter as string).Length > 0)
return true;
else if (parameter != null && (parameter is IEnumerable<object>) && (parameter as IEnumerable<object>).Count() > 0)
return true;
else
return false;
}
catch(Exception ex)
{
return false;
}
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
}
}
2. Add Converter as a resource in a XAML page:
<ContentPage.Resources>
<ResourceDictionary>
<local:HideIfEmptyValueConverter x:Key="IsVisibleConverter"/>
</ResourceDictionary>
</ContentPage.Resources>
3. Use the converter key on any Control:
For example:
<Label x:Name="Header2"
FontSize="Small"
Text="{Binding Title2}"
IsVisible="{Binding Title2, Converter={StaticResource IsVisibleConverter}}" />
It should work.
