asm & csm: add file size to WorldSaveRestoreWindow

src/ServerManager.Common/Converters/FileSizeConverter.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Globalization;
+using System.Windows.Data;
+using System.Windows.Markup;
+
+namespace ServerManagerTool.Common.Converters
+{
+    public class FileSizeConverter : MarkupExtension, IValueConverter
+    {
+        private const decimal DIVISOR = 1024M;
+
+        // Load all suffixes in an array  
+        private static readonly string[] suffixes = { "Bytes", "KB", "MB", "GB", "TB", "PB" };
+
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            var counter = 0;
+            var number = System.Convert.ToDecimal(value);
+
+            while (number / DIVISOR >= 1)
+            {
+                number /= DIVISOR;
+                counter++;
+            }
+
+            return string.Format("{0:n2} {1}", number, suffixes[counter]);
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new InvalidOperationException("FileSizeConverter can only be used OneWay.");
+        }
+
+        public override object ProvideValue(IServiceProvider serviceProvider)
+        {
+            return this;
+        }
+    }
+}