diff --git a/HotPage.xaml b/HotPage.xaml
index b74bff6..9514d3d 100644
--- a/HotPage.xaml
+++ b/HotPage.xaml
@@ -82,7 +82,7 @@
 
     <phone:PhoneApplicationPage.ApplicationBar>
         <shell:ApplicationBar IsVisible="True" IsMenuEnabled="True">
-            <shell:ApplicationBarIconButton IconUri="/Images/refresh.png" Text="刷新"/>
+            <shell:ApplicationBarIconButton Click="Refresh_Click" IconUri="/Images/refresh.png" Text="刷新"/>
         </shell:ApplicationBar>
     </phone:PhoneApplicationPage.ApplicationBar>
     
diff --git a/HotPage.xaml.cs b/HotPage.xaml.cs
index 8a566df..cc8eb55 100644
--- a/HotPage.xaml.cs
+++ b/HotPage.xaml.cs
@@ -19,14 +19,15 @@ namespace sbbs_client_wp7
 
     public partial class HotPage : PhoneApplicationPage
     {
-        private HotViewModel viewModel = new HotViewModel();
-        private bool isHotTopicsLoading = true;
+        private bool isHotTopicsLoading;
 
         public HotPage()
         {
             InitializeComponent();
 
-            DataContext = viewModel;
+            if (App.ViewModel.Hot == null)
+                App.ViewModel.Hot = new HotViewModel();
+            DataContext = App.ViewModel.Hot;
         }
 
         protected override void OnNavigatedTo(NavigationEventArgs e)
@@ -39,7 +40,7 @@ protected override void OnNavigatedTo(NavigationEventArgs e)
                 switch (type)
                 {
                     case 0:
-                        if (viewModel.TopicsGroupItems == null)
+                        if (App.ViewModel.Hot.TopicsGroupItems == null)
                             LoadHotTopics();
                         break;
                 }
@@ -48,7 +49,7 @@ protected override void OnNavigatedTo(NavigationEventArgs e)
 
         private void SetLoading()
         {
-            viewModel.IsLoading = isHotTopicsLoading;
+            App.ViewModel.Hot.IsLoading = isHotTopicsLoading;
         }
 
         private void LoadHotTopics()
@@ -71,7 +72,7 @@ private void LoadHotTopics()
                         newGroup.Add(newItem);
                     }
 
-                    viewModel.TopicsGroupItems = newGroup;
+                    App.ViewModel.Hot.TopicsGroupItems = newGroup;
                 }
             });
         }
@@ -92,5 +93,10 @@ private void LongListSelector_SelectionChanged(object sender, SelectionChangedEv
                     new Uri("/TopicPage.xaml?board=" + topic.Board + "&id=" + topic.Id + "&title=" + HttpUtility.UrlEncode(topic.Title), UriKind.Relative));
             }
         }
+
+        private void Refresh_Click(object sender, EventArgs e)
+        {
+            LoadHotTopics();
+        }
     }
 }
\ No newline at end of file
diff --git a/ViewModels/MainViewModel.cs b/ViewModels/MainViewModel.cs
index 1d99124..3299e59 100644
--- a/ViewModels/MainViewModel.cs
+++ b/ViewModels/MainViewModel.cs
@@ -104,6 +104,7 @@ public ObservableCollection<BoardViewModel> FavoratesItems
         public CurrentBoardViewModel CurrentBoard { get; set; }
         // 当前话题
         public CurrentTopicViewModel CurrentTopic { get; set; }
+        public HotViewModel Hot { get; set; }
 
         // 是否已经登陆
         public bool IsLogin