大量更新

Szmedi.RvKits/Converters/NullOrEmptyToBooleanConverter.cs

@@ -0,0 +1,17 @@
+using System.Globalization;
+using System.Windows.Data;
+
+namespace Szmedi.RvKits.Converters
+{
+    public class NullOrEmptyToBooleanConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            var str = value as string;
+            return !string.IsNullOrEmpty(str); // 非空返回 true
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+            => throw new NotImplementedException();
+    }
+}