首次提交

WpfAppTest/NullableToVisibilityConverter.cs

@@ -0,0 +1,36 @@
+using System.Globalization;
+using System.Windows;
+using System.Windows.Data;
+using System;
+
+namespace WpfAppTest.Converter
+{
+    public class NullableToVisibilityConverter : IValueConverter
+    {
+        /// <summary>
+        /// The visibility value if the argument is null.
+        /// </summary>
+        public Visibility NullValue { get; set; }
+
+        public Visibility NotNullValue { get; set; }
+
+        /// <summary>
+        /// Creates a new <see cref="NotNullToVisibilityConverter" />.
+        /// </summary>
+        public NullableToVisibilityConverter()
+        {
+            NullValue = Visibility.Collapsed;
+            NotNullValue = Visibility.Visible;
+        }
+
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return value == null ? NullValue : NotNullValue;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return Binding.DoNothing;
+        }
+    }
+}