1 files changed, 33 insertions, 14 deletions
diff --git a/Ivy/IvyBindingAttribute.cs b/Ivy/IvyBindingAttribute.cs
index 90c44ce..1380f0f 100644
--- a/Ivy/IvyBindingAttribute.cs
+++ b/Ivy/IvyBindingAttribute.cs
@@ -1,31 +1,50 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
+
 
 namespace IvyBus
 {
-    [AttributeUsage(AttributeTargets.Method,AllowMultiple = true)]
+    using System;
+    using System.Collections.Generic;
+    using System.Text;
+    using System.Collections.ObjectModel;
+    using System.Globalization;
+
+    [AttributeUsage(AttributeTargets.Method, AllowMultiple = true)]
     public sealed class IvyBindingAttribute : Attribute
     {
         private string expression;
         private string[] args;
 
-        // translate part of expression to object property
-        public string GetExpression(object obj)
+        public string Expression
         {
-            if (obj == null) return string.Format(expression);
-            object[] values = new object[args.Length];
-            for (int i = 0; i < args.Length; i++)
-            {
-                values[i] = obj.GetType().GetProperty(args[i]).GetValue(obj,null);
-            }
-            return string.Format(expression,values);
+            get { return this.expression; }
         }
-
+        
+        public ReadOnlyCollection<string> Args
+        {
+            get { return new ReadOnlyCollection<string>(args); }
+        }
+        
         public IvyBindingAttribute(string expression, params string[] args)
         {
             this.expression = expression;
             this.args = args;
         }
+
+        // translate part of expression to object property
+        public string GetFormattedExpression(object target)
+        {
+            if (target == null)
+            {
+                return string.Format(this.expression);
+            }
+
+            object[] values = new object[this.args.Length];
+            for (int i = 0; i < values.Length; i++)
+            {
+                values[i] = target.GetType().GetProperty(args[i]).GetValue(target, null);
+            }
+
+            return string.Format(this.expression, values);
+        }
     }
 }