Version 3.0.255

LastenradBayern/TINK/View/StringNotNullOrEmptyToVisibleConverter.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Globalization;
+using Xamarin.Forms;
+
+namespace TINK.View
+{
+    /// <summary> Converts a string into visible state. If string is null or empty element becomes invisible.</summary>
+    public class StringNotNullOrEmptyToVisibleConverter : IValueConverter
+    {
+        /// <summary> Converts a string into visible state.</summary>
+        /// <param name="value">Text value from view model used to derive whether object is visible or not.</param>
+        /// <returns>Boolean value indicating whether object is visible or not.</returns>
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return value != null && value is string text && !string.IsNullOrEmpty(text);
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return "";
+        }
+    }
+}