Calculator: localize value

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/Calculator/Implementation/Calculator.cs

@@ -269,7 +269,7 @@ namespace Microsoft.Windows.Controls
         private decimal CalculateValue(Operation operation)
         {
             decimal newValue = decimal.Zero;
-            decimal currentValue = Decimal.Parse(DisplayText);
+            decimal currentValue = CalculatorUtilities.ParseDecimal(DisplayText);
 
             switch (operation)
             {
@@ -345,10 +345,12 @@ namespace Microsoft.Windows.Controls
 
         private void ProcessMemoryKey(Calculator.CalculatorButtonType buttonType)
         {
+            decimal currentValue = CalculatorUtilities.ParseDecimal(DisplayText);
+
             switch (buttonType)
             {
                 case Calculator.CalculatorButtonType.MAdd:
-                    Memory += Decimal.Parse(DisplayText);
+                    Memory += currentValue;
                     break;
                 case Calculator.CalculatorButtonType.MC:
                     Memory = decimal.Zero;
@@ -357,10 +359,10 @@ namespace Microsoft.Windows.Controls
                     DisplayText = Memory.ToString();
                     break;
                 case Calculator.CalculatorButtonType.MS:
-                    Memory = Decimal.Parse(DisplayText);
+                    Memory = currentValue;
                     break;
                 case Calculator.CalculatorButtonType.MSub:
-                    Memory -= Decimal.Parse(DisplayText);
+                    Memory -= currentValue;
                     break;
                 default:
                     break;

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/Core/Utilities/CalculatorUtilities.cs

@@ -29,9 +29,12 @@ namespace Microsoft.Windows.Controls.Core.Utilities
                 case "\b": return Calculator.CalculatorButtonType.Back;
                 case "\r":
                 case "=": return Calculator.CalculatorButtonType.Equal;
-                case ".": return Calculator.CalculatorButtonType.Decimal;
             }
 
+            //the check for the decimal is not in the switch statement. To help localize we check against the current culture's decimal seperator
+            if (text == System.Threading.Thread.CurrentThread.CurrentCulture.NumberFormat.CurrencyDecimalSeparator)
+                return Calculator.CalculatorButtonType.Decimal;
+
             //check for the escape key
             if (text == ((char)27).ToString())
                 return Calculator.CalculatorButtonType.Clear;
@@ -193,7 +196,10 @@ namespace Microsoft.Windows.Controls.Core.Utilities
             }
         }
 
-        //TODO: add error handling
+        public static decimal ParseDecimal(string text)
+        {
+            return Decimal.Parse(text, System.Threading.Thread.CurrentThread.CurrentCulture);
+        }
 
         public static decimal Add(decimal firstNumber, decimal secondNumber)
         {