38 lines
1.0 KiB
C#
38 lines
1.0 KiB
C#
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using System;
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using System.Globalization;
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using System.Linq;
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using System.Windows;
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using System.Windows.Data;
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namespace ShrlAlgoToolkit.Mvvm.Converters
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{
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/// <summary>
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/// Converts null or not null to a <see cref="Visibility" />.
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/// </summary>
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public class NotNullToVisibilityConverter : IValueConverter
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{
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/// <summary>
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/// The visibility value if the argument is null.
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/// </summary>
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public Visibility NullValue { get; set; }
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/// <summary>
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/// Creates a new <see cref="NotNullToVisibilityConverter" />.
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/// </summary>
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public NotNullToVisibilityConverter()
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{
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NullValue = Visibility.Collapsed;
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}
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public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
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{
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return value == null ? NullValue : Visibility.Visible;
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}
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public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
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{
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return Binding.DoNothing;
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}
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}
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}
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