qdr.app.tools/FilteredSolutionsExtension/FilteredSolutionsExtension/StringToVisibilityConverter.cs

using System;
using System.Globalization;
using System.Windows;
using System.Windows.Data;

namespace Quadarax.Application.Tools.Vsix.FilteredSolutionsExtension
{
    public class StringToVisibilityConverter : IValueConverter
    {
        public static readonly StringToVisibilityConverter Instance = new StringToVisibilityConverter();

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is string stringValue)
            {
                return string.IsNullOrWhiteSpace(stringValue) ? Visibility.Collapsed : Visibility.Visible;
            }
            
            return value == null ? Visibility.Collapsed : Visibility.Visible;
        }

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