first edit

XLIMS.MVVM/Converters/VisibilityConverter.cs

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+using System;
+using System.Windows.Data;
+using System.Globalization;
+using System.Windows;
+
+namespace XLIMS.MVVM.Converters
+{
+    [ValueConversion(typeof(string), typeof(Visibility))]
+    public class VisibilityConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value != null)
+            {
+                return Visibility.Visible;
+                //string s = value.ToString();
+                //object s1 = value;
+                //if (s1 is decimal)
+                //    if ((decimal.Parse(s1.ToString())) == 0) return Visibility.Collapsed;
+                //if (s1 is bool)
+                //    if ((bool.Parse(s1.ToString())) == false) return Visibility.Collapsed;
+                //if (string.IsNullOrEmpty(s)) return Visibility.Collapsed;
+            }
+            return Visibility.Collapsed;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return value;
+        }
+    }
+}