Implement ToString and GetHashCode methods for ResultItemViewModel

Wox/ViewModel/ResultItemViewModel.cs

@@ -119,14 +119,20 @@ namespace Wox.ViewModel
             ResultItemViewModel r = obj as ResultItemViewModel;
             if (r != null)
             {
-                var equality = string.Equals(r.Title, Title) &&
+                return _result.Equals(r.RawResult);
-                               string.Equals(r.SubTitle, SubTitle);
-                return equality;
-            }
-            else
-            {
-                return false;
             }
+            
+            return false;
+        }
+
+        public override int GetHashCode()
+        {
+            return _result.GetHashCode();
+        }
+
+        public override string ToString()
+        {
+            return _result.ToString();
         }
 
         public event EventHandler<ResultOpenedEventArgs> ResultOpened;

Wox/ViewModel/ResultPanelViewModel.cs

@@ -79,7 +79,7 @@ namespace Wox.ViewModel
             }
             set
             {
-                if (value != _selectedResult)
+                if (null != value)
                 {
                     if (null != _selectedResult)
                     {
@@ -93,8 +93,10 @@ namespace Wox.ViewModel
                         _selectedResult.IsSelected = true;
                     }
 
-                    OnPropertyChanged("SelectedResult");
                 }
+
+                OnPropertyChanged("SelectedResult");
+
             }
         }