Error reporting (via email)

fix Hammock rest error handling

main/MyFriendsAround.WP7/App.xaml

@@ -8,7 +8,9 @@
              mc:Ignorable="d"
              xmlns:vm="clr-namespace:MyFriendsAround.WP7.ViewModel"
              xmlns:my="clr-namespace:Coding4Fun.Phone.Controls.Converters;assembly=Coding4Fun.Phone.Controls"
-             xmlns:my1="clr-namespace:Microsoft.Silverlight.Testing.Client;assembly=Microsoft.Silverlight.Testing">
+             xmlns:my1="clr-namespace:Microsoft.Silverlight.Testing.Client;assembly=Microsoft.Silverlight.Testing"
+             xmlns:Controls="clr-namespace:Coding4Fun.Phone.Controls;assembly=Coding4Fun.Phone.Controls"
+             xmlns:Views="clr-namespace:MyFriendsAround.WP7.Views">
 
     <!--Application Resources-->
     <Application.Resources>
@@ -16,6 +18,8 @@
                              d:IsDataSource="True" />
         <my:BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter1" />
         <my1:InvertValueConverter x:Key="InvertValueConverter1" />
+
+
     </Application.Resources>
 
     <Application.ApplicationLifetimeObjects>

main/MyFriendsAround.WP7/App.xaml.cs

@@ -15,6 +15,7 @@ using Microsoft.Phone.Shell;
 using MyFriendsAround.WP7.ViewModel;
 using MyFriendsAround.WP7.Utils;
 using GalaSoft.MvvmLight.Threading;
+using MyFriendsAround.WP7.Views;
 
 
 namespace MyFriendsAround.WP7
@@ -109,6 +110,14 @@ namespace MyFriendsAround.WP7
         // Code to execute if a navigation fails
         void RootFrame_NavigationFailed(object sender, NavigationFailedEventArgs e)
         {
+            //LittleWatson.ReportException(e.Exception, string.Empty);
+            DispatcherHelper.CheckBeginInvokeOnUI(() =>
+                {
+                    var exception = new ExceptionPrompt();
+                    exception.Show(e.Exception);
+                }
+            );
+
             if (System.Diagnostics.Debugger.IsAttached)
             {
                 // A navigation has failed; break into the debugger
@@ -119,11 +128,22 @@ namespace MyFriendsAround.WP7
         // Code to execute on Unhandled Exceptions
         private void Application_UnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e)
         {
+            //LittleWatson.ReportException(e.ExceptionObject, string.Empty);
+
+            DispatcherHelper.CheckBeginInvokeOnUI(() =>
+                {
+                    var exception = new ExceptionPrompt();
+                    exception.Show(e.ExceptionObject);
+                }
+            );
+
             if (System.Diagnostics.Debugger.IsAttached)
             {
                 // An unhandled exception has occurred; break into the debugger
                 System.Diagnostics.Debugger.Break();
             }
+
+            e.Handled = true;
         }
 
 
@@ -159,6 +179,8 @@ namespace MyFriendsAround.WP7
 
             // Remove this handler since it is no longer needed
             RootFrame.Navigated -= CompleteInitializePhoneApplication;
+            //
+            //LittleWatson.CheckForPreviousException();
         }
 
         #endregion

main/MyFriendsAround.WP7/MyFriendsAround.WP7.csproj

@@ -20,7 +20,7 @@
     </SupportedCultures>
     <XapOutputs>true</XapOutputs>
     <GenerateSilverlightManifest>true</GenerateSilverlightManifest>
-    <XapFilename>MyFriendsAround.WP7.xap</XapFilename>
+    <XapFilename>MyFriendsAround.xap</XapFilename>
     <SilverlightManifestTemplate>Properties\AppManifest.xml</SilverlightManifestTemplate>
     <SilverlightAppEntry>MyFriendsAround.WP7.App</SilverlightAppEntry>
     <ValidateXaml>true</ValidateXaml>
@@ -77,12 +77,18 @@
       <SpecificVersion>False</SpecificVersion>
       <HintPath>C:\Program Files\Laurent Bugnion (GalaSoft)\Mvvm Light Toolkit\Binaries\WP7\GalaSoft.MvvmLight.Extras.WP7.dll</HintPath>
     </Reference>
-    <Reference Include="Hammock.WindowsPhone">
+    <Reference Include="Hammock.WindowsPhone, Version=1.0.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\Libs\Hammock-Binaries\.NET 4.0\Windows Phone 7\Hammock.WindowsPhone.dll</HintPath>
+      <HintPath>..\Libs\Hammock\wp7\Hammock.WindowsPhone.dll</HintPath>
+    </Reference>
+    <Reference Include="ICSharpCode.SharpZipLib.Silverlight">
+      <HintPath>..\packages\Hammock.1.2.1\lib\sl4\ICSharpCode.SharpZipLib.Silverlight.dll</HintPath>
     </Reference>
     <Reference Include="ICSharpCode.SharpZipLib.WindowsPhone">
       <HintPath>..\Libs\Hammock-Binaries\.NET 4.0\Windows Phone 7\ICSharpCode.SharpZipLib.WindowsPhone.dll</HintPath>
     </Reference>
+    <Reference Include="Microsoft.CSharp">
+      <HintPath>..\packages\Hammock.1.2.1\lib\sl4\Microsoft.CSharp.dll</HintPath>
+    </Reference>
     <Reference Include="Microsoft.Phone.Controls.Maps, Version=7.0.0.0, Culture=neutral, PublicKeyToken=24eec0d8c86cda1e" />
     <Reference Include="Microsoft.Phone.Controls.Toolkit, Version=1.0.0.0, Culture=neutral, PublicKeyToken=b772ad94eb9ca604, processorArchitecture=MSIL">
       <HintPath>..\packages\Coding4Fun.Phone.Controls.Complete.1.2\lib\Microsoft.Phone.Controls.Toolkit.dll</HintPath>
@@ -97,7 +103,13 @@
       <HintPath>..\Libs\Json40r1\WindowsPhone\Newtonsoft.Json.WindowsPhone.dll</HintPath>
     </Reference>
     <Reference Include="System.Device" />
+    <Reference Include="System.Json">
+      <HintPath>..\packages\Hammock.1.2.1\lib\sl4\System.Json.dll</HintPath>
+    </Reference>
     <Reference Include="System.Runtime.Serialization" />
+    <Reference Include="System.Runtime.Serialization.Json">
+      <HintPath>..\packages\Hammock.1.2.1\lib\sl4\System.Runtime.Serialization.Json.dll</HintPath>
+    </Reference>
     <Reference Include="System.ServiceModel" />
     <Reference Include="System.Windows.Interactivity">
       <SpecificVersion>False</SpecificVersion>
@@ -111,6 +123,10 @@
     <Reference Include="System.Core" />
     <Reference Include="System.Net" />
     <Reference Include="System.Xml" />
+    <Reference Include="System.Xml.Linq">
+      <Private>True</Private>
+      <HintPath>..\packages\Hammock.1.2.1\lib\sl4\System.Xml.Linq.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\MyFriendsAround.Common\Entities\Friend.cs">
@@ -125,9 +141,15 @@
     <Compile Include="Helpers\Navigation\IPageNavigation.cs" />
     <Compile Include="Helpers\Navigation\PageNavigation.cs" />
     <Compile Include="Utils\ApplicationExtensions.cs" />
+    <Compile Include="Utils\LittleWatson.cs">
+      <SubType>Code</SubType>
+    </Compile>
     <Compile Include="Views\AboutPage.xaml.cs">
       <DependentUpon>AboutPage.xaml</DependentUpon>
     </Compile>
+    <Compile Include="Views\ExceptionPrompt.cs">
+      <SubType>Code</SubType>
+    </Compile>
     <Compile Include="Views\MainPage.xaml.cs">
       <DependentUpon>MainPage.xaml</DependentUpon>
     </Compile>
@@ -150,6 +172,10 @@
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>
     </ApplicationDefinition>
+    <Page Include="Themes\Generic.xaml">
+      <Generator>MSBuild:Compile</Generator>
+      <SubType>Designer</SubType>
+    </Page>
     <Page Include="Views\AboutPage.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>

main/MyFriendsAround.WP7/Properties/WMAppManifest.xml

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-
 <Deployment xmlns="http://schemas.microsoft.com/windowsphone/2009/deployment" AppPlatformVersion="7.0">
-  <App xmlns="" ProductID="{ac5b5d62-573c-4134-b290-0ad4f678ad7f}" Title="MyFriendsAround.WP7" RuntimeType="Silverlight" Version="1.0.0.0" Genre="apps.normal"  Author="MyFriendsAround.WP7 author" Description="Sample description" Publisher="MyFriendsAround.WP7 publisher">
+  <App xmlns="" ProductID="{ac5b5d62-573c-4134-b290-0ad4f678ad7f}" Title="MyFriendsAround" RuntimeType="Silverlight" Version="1.0.0.0" Genre="apps.normal" Author="MyFriendsAround.WP7 author" Description="Sample description" Publisher="MyFriendsAround.WP7 publisher">
     <IconPath IsRelative="true" IsResource="false">ApplicationIcon.png</IconPath>
     <Capabilities>
       <Capability Name="ID_CAP_NETWORKING" />

main/MyFriendsAround.WP7/Service/FriendsListEventArgs.cs

@@ -16,5 +16,6 @@ namespace MyFriendsAround.WP7.Service
     public class FriendsListEventArgs: EventArgs
     {
         public List<Friend> Friends { get; set; }
+        public Exception Error { get; set; }
     }
 }

main/MyFriendsAround.WP7/Service/PublishLocationEventArgs.cs

@@ -8,5 +8,6 @@ namespace MyFriendsAround.WP7.Service
     public class PublishLocationEventArgs: EventArgs
     {
         public bool IsSuccess { get; set; }
+        public Exception Error { get; set; }
     }
 }

main/MyFriendsAround.WP7/Service/ServiceAgent.cs

@@ -1,27 +1,17 @@
 using System;
 using System.Collections.Generic;
 using System.Net;
-using System.Windows;
-using System.Windows.Controls;
-using System.Windows.Documents;
-using System.Windows.Ink;
-using System.Windows.Input;
-using System.Windows.Media;
-using System.Windows.Media.Animation;
-using System.Windows.Shapes;
 using Hammock;
-using Hammock.Streaming;
-using Hammock.Tasks;
 using Hammock.Web;
 using MyFriendsAround.Common.Entities;
-using Hammock.Caching;
-using CacheMode = Hammock.Caching.CacheMode;
 
 namespace MyFriendsAround.WP7.Service
 {
     public static class ServiceAgent
     {
 
+        private static int _timeOut = 10;
+
         #region GetFriends
 
         private static EventHandler<FriendsListEventArgs> friendscallback;
@@ -32,16 +22,26 @@ namespace MyFriendsAround.WP7.Service
             RestClient client = new RestClient
             {
                 Authority = "http://localhost.:55672/myfriends",
+                Timeout = new TimeSpan(0, 0, 0, _timeOut),
                 Serializer = serializer,
                 Deserializer = serializer
             };
             RestRequest request = new RestRequest
                                       {
-                                          Path = "GetFriends" + "?timestamp=" + DateTime.Now.Ticks.ToString()
+                                          Path = "GetFriends" + "?timestamp=" + DateTime.Now.Ticks.ToString(),
+                                          Timeout = new TimeSpan(0, 0, 0, _timeOut)
                                       };
             friendscallback = callback;
+            try
+            {
                 client.BeginRequest(request, new RestCallback<List<Friend>>(GetFriendsCallback));
             }
+            catch (Exception ex)
+            {
+                friendscallback.Invoke(null, new FriendsListEventArgs() { Friends = null, Error = ex });
+            }
+            
+        }
 
         public static void GetFriendsCallback(RestRequest request, RestResponse<List<Friend>> response, object userState)
         {
@@ -50,6 +50,10 @@ namespace MyFriendsAround.WP7.Service
                 List<Friend> list = response.ContentEntity;
                 friendscallback.Invoke(null, new FriendsListEventArgs() { Friends = list });
             }
+            else
+            {
+                friendscallback.Invoke(null, new FriendsListEventArgs() { Friends = null, Error = new Exception("Communication Error!") });
+            }
         }
 
         #endregion
@@ -66,18 +70,28 @@ namespace MyFriendsAround.WP7.Service
             RestClient client = new RestClient
             {
                 Authority = "http://localhost.:55672/myfriends",
+                Timeout = new TimeSpan(0, 0, 0, _timeOut),
                 Serializer = serializer,
                 Deserializer = serializer
             };
             RestRequest request = new RestRequest
             {
+                Timeout = new TimeSpan(0, 0, 0, _timeOut),
                 Method = WebMethod.Post,
                 Path = "PublishLocation",
                 Entity = friend
             };
             publishlocationcallback = callback;
+            try
+            {
                 client.BeginRequest(request, new RestCallback<bool>(PublishLocationCallback));
             }
+            catch (Exception ex)
+            {
+                publishlocationcallback.Invoke(null, new PublishLocationEventArgs() { IsSuccess = false, Error = ex });
+            }
+            
+        }
 
         public static void PublishLocationCallback(RestRequest request, RestResponse<bool> response, object userState)
         {
@@ -86,6 +100,10 @@ namespace MyFriendsAround.WP7.Service
                 bool success = response.ContentEntity;
                 publishlocationcallback.Invoke(null, new PublishLocationEventArgs() { IsSuccess = success });
             }
+            else
+            {
+                publishlocationcallback.Invoke(null, new PublishLocationEventArgs() { IsSuccess = false, Error = new Exception("Communication Error!")});
+            }
         }
 
         #endregion

main/MyFriendsAround.WP7/Themes/Generic.xaml

@@ -0,0 +1,59 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                    xmlns:Controls="clr-namespace:Coding4Fun.Phone.Controls;assembly=Coding4Fun.Phone.Controls"
+                    xmlns:Views="clr-namespace:MyFriendsAround.WP7.Views">
+
+
+    <Style TargetType="Views:ExceptionPrompt">
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="Views:ExceptionPrompt">
+                    <Grid>
+                        <Rectangle Fill="Transparent" />
+                        <Border VerticalAlignment="Center"
+                                Width="460"
+                                Height="390"
+                                Background="{StaticResource PhoneChromeBrush}"
+                                BorderThickness="1"
+                                BorderBrush="{StaticResource PhoneForegroundBrush}">
+                        </Border>
+                        <Grid Width="450"
+                              Height="380"
+                              HorizontalAlignment="Center"
+                              VerticalAlignment="Center">
+                            <Grid.RowDefinitions>
+                                <RowDefinition Height="Auto" />
+                                <RowDefinition Height="*" />
+                                <RowDefinition Height="Auto" />
+                                <RowDefinition Height="Auto" />
+                            </Grid.RowDefinitions>
+                            <TextBlock Grid.Row="0"
+                                       Text="The program has encountered a problem and needs to close. We are sorry for the inconvenience."
+                                       TextWrapping="Wrap"
+                                       HorizontalAlignment="Center"
+                                       Margin="5"
+                                       Style="{StaticResource PhoneTextNormalStyle}" />
+                            <TextBlock Grid.Row="1"
+                                       Text="We have created an error report that you can send to the developers."
+                                       TextWrapping="Wrap"
+                                       HorizontalAlignment="Center"
+                                       Margin="5,10,5,5"
+                                       Style="{StaticResource PhoneTextNormalStyle}" />
+
+                            <CheckBox Content="Email report to developer"
+                                      Grid.Row="2"
+                                      x:Name="canSubmitCheckBox" />
+                            <Controls:RoundButton x:Name="okButton"
+                                                  VerticalAlignment="Bottom"
+                                                  HorizontalAlignment="Center"
+                                                  Grid.Row="3" />
+                        </Grid>
+                    </Grid>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
+
+
+</ResourceDictionary>

main/MyFriendsAround.WP7/Utils/LittleWatson.cs

@@ -0,0 +1,82 @@
+using System;
+using System.IO;
+using System.IO.IsolatedStorage;
+using System.Windows;
+using Microsoft.Phone.Tasks;
+
+namespace MyFriendsAround.WP7.Utils
+{
+    public class LittleWatson
+    {
+        const string filename = "LittleWatson.txt";
+
+        internal static void ReportException(Exception ex, string extra)
+        {
+            try
+            {
+                using (var store = IsolatedStorageFile.GetUserStoreForApplication())
+                {
+                    SafeDeleteFile(store);
+                    using (TextWriter output = new StreamWriter(store.CreateFile(filename)))
+                    {
+                        output.WriteLine(extra);
+                        output.WriteLine(ex.Message);
+                        output.WriteLine(ex.StackTrace);
+                    }
+                }
+            }
+            catch (Exception)
+            {
+            }
+        }
+
+        internal static void CheckForPreviousException()
+        {
+            try
+            {
+                string contents = null;
+                using (var store = IsolatedStorageFile.GetUserStoreForApplication())
+                {
+                    if (store.FileExists(filename))
+                    {
+                        using (TextReader reader = new StreamReader(store.OpenFile(filename, FileMode.Open, FileAccess.Read, FileShare.None)))
+                        {
+                            contents = reader.ReadToEnd();
+                        }
+                        SafeDeleteFile(store);
+                    }
+                }
+                if (contents != null)
+                {
+                    if (MessageBox.Show("A problem occurred the last time you ran this application. Would you like to send an email to report it?", "Problem Report", MessageBoxButton.OKCancel) == MessageBoxResult.OK)
+                    {
+                        EmailComposeTask email = new EmailComposeTask();
+                        email.To = "someone@example.com";
+                        email.Subject = "YourAppName auto-generated problem report";
+                        email.Body = contents;
+                        SafeDeleteFile(IsolatedStorageFile.GetUserStoreForApplication()); // line added 1/15/2011
+                        email.Show();
+                    }
+                }
+            }
+            catch (Exception)
+            {
+            }
+            finally
+            {
+                SafeDeleteFile(IsolatedStorageFile.GetUserStoreForApplication());
+            }
+        }
+
+        private static void SafeDeleteFile(IsolatedStorageFile store)
+        {
+            try
+            {
+                store.DeleteFile(filename);
+            }
+            catch (Exception ex)
+            {
+            }
+        }
+    }
+}

main/MyFriendsAround.WP7/ViewModel/MainViewModel.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.Device.Location;
 using System.Net;
+using System.Security;
 using System.ServiceModel.Channels;
 using System.Windows;
 using System.Windows.Input;
@@ -17,6 +18,7 @@ using Microsoft.Silverlight.Testing;
 using MyFriendsAround.Common.Entities;
 using MyFriendsAround.WP7.Service;
 using MyFriendsAround.WP7.Utils;
+using MyFriendsAround.WP7.Views;
 using Newtonsoft.Json;
 
 namespace MyFriendsAround.WP7.ViewModel
@@ -59,7 +61,6 @@ namespace MyFriendsAround.WP7.ViewModel
             //
             PublishLocationCommand = new RelayCommand(() => PublishLocationAction());
             DisplayAboutCommand = new RelayCommand(() => DisplayAbout());
-            InputBoxCommand = new RelayCommand(() => InputBox());
             NavigateToAboutCommand = new RelayCommand(() => NavigateToAbout());
             RefreshFriendsCommand = new RelayCommand(() => RefreshFriends());
 
@@ -86,11 +87,6 @@ namespace MyFriendsAround.WP7.ViewModel
             this.PageNav.NavigateTo(new Uri("/Views/AboutPage.xaml", UriKind.Relative));
         }
 
-        private void InputBox()
-        {
-            MessageBox.Show("Input box");
-        }
-
 
         private void DisplayAbout()
         {
@@ -126,6 +122,8 @@ namespace MyFriendsAround.WP7.ViewModel
         }
 
         public void GetFriendsResult(object sender, FriendsListEventArgs args)
+        {
+            if (args.Error == null)
             {
                 List<Friend> list = args.Friends;
                 DispatcherHelper.CheckBeginInvokeOnUI(() =>
@@ -135,24 +133,52 @@ namespace MyFriendsAround.WP7.ViewModel
                                                           }
                     );
             }
+            else
+            {
+                DispatcherHelper.CheckBeginInvokeOnUI(() =>
+                                                          {
+                                                              IsBusy = false;
+                                                              var exception = new ExceptionPrompt();
+                                                              exception.Show(args.Error);
+                                                          }
+                    );
+            }
+        }
 
         public void PublishLocationResult(object sender, PublishLocationEventArgs args)
+        {
+            if (args.Error != null)
+            {
+                DispatcherHelper.CheckBeginInvokeOnUI(() =>
+                                                          {
+                                                              IsBusy = false;
+                                                              var exception = new ExceptionPrompt();
+                                                              exception.Show(args.Error);
+                                                          });
+            }
+            else
             {
                 if (!args.IsSuccess)
                 {
-                var message = new DialogMessage("Communication error!", DialogMessageCallback)
+                    DispatcherHelper.CheckBeginInvokeOnUI(() =>
+                                                              {
+                                                                  var message = new DialogMessage(
+                                                                      "Communication error!", DialogMessageCallback)
                                                                                     {
                                                                                         Button = MessageBoxButton.OK,
                                                                                         Caption = "Error!"
                                                                                     };
 
                                                                   Messenger.Default.Send(message);
+                                                              });
                 }
                 //
                 //update
                 ServiceAgent.GetFriends(this.GetFriendsResult);
             }
 
+        }
+
         private void DialogMessageCallback(MessageBoxResult result)
         {
             if (result == MessageBoxResult.OK)
@@ -167,7 +193,6 @@ namespace MyFriendsAround.WP7.ViewModel
 
         public ICommand PublishLocationCommand { get; set; }
         public ICommand DisplayAboutCommand { get; set; }
-        public ICommand InputBoxCommand { get; set; }
         public ICommand NavigateToAboutCommand { get; set; }
         public ICommand RefreshFriendsCommand { get; set; }
 
@@ -198,7 +223,8 @@ namespace MyFriendsAround.WP7.ViewModel
         }
 
 
-        public string AppBarTextAbout {
+        public string AppBarTextAbout
+        {
             get { return "About"; }
         }
 

main/MyFriendsAround.WP7/Views/ExceptionPrompt.cs

@@ -0,0 +1,68 @@
+using System;
+using System.Text;
+using System.Windows;
+using System.Windows.Controls;
+using Coding4Fun.Phone.Controls;
+
+namespace MyFriendsAround.WP7.Views
+{
+    public class ExceptionPrompt: PopUp<Exception, PopUpResult>
+    {
+
+        private Button okButton;
+        private CheckBox submitCheckBox;
+        private Exception exception;
+
+        public ExceptionPrompt()
+        {
+            DefaultStyleKey = typeof(ExceptionPrompt);
+            DataContext = this;
+        }
+
+        public override void OnApplyTemplate()
+        {
+            base.OnApplyTemplate();
+
+            if (okButton != null)
+                okButton.Click -= okButton_Click;
+
+            okButton = GetTemplateChild("okButton") as Button;
+            submitCheckBox = GetTemplateChild("canSubmitCheckBox") as CheckBox;
+
+            if (okButton != null)
+                okButton.Click += okButton_Click;
+        }
+
+        public string To { get; set; }
+
+        void okButton_Click(object sender, RoutedEventArgs e)
+        {
+            var message = new StringBuilder();
+            message.Append("Exception type: ");
+            message.Append(exception.GetType());
+            message.Append(Environment.NewLine);
+            message.Append("Message: ");
+            message.Append(exception.Message);
+            message.Append(Environment.NewLine);
+            message.Append("Stack trace: ");
+            message.Append(exception.StackTrace);
+            message.ToString();
+
+            var task = new Microsoft.Phone.Tasks.EmailComposeTask { Body = message.ToString(), Subject = "Error Report", To = To };
+
+            if (submitCheckBox.IsChecked == true)
+            {
+                task.Show();
+            }
+
+            OnCompleted(new PopUpEventArgs<Exception, PopUpResult> { PopUpResult = PopUpResult.Ok });
+        }
+
+        public void Show(Exception exception)
+        {
+            this.exception = exception;
+            base.Show();
+        }
+
+    }
+}

main/MyFriendsAround.WP7/Views/MainPage.xaml

@@ -38,11 +38,11 @@
         </ControlTemplate>
     </phone:PhoneApplicationPage.Resources>
 
-    <i:Interaction.Triggers>
+    <!--<i:Interaction.Triggers>
         <i:EventTrigger EventName="Loaded">
             <cmd:EventToCommand Command="{Binding RefreshFriendsCommand}" />
         </i:EventTrigger>
-    </i:Interaction.Triggers>
+    </i:Interaction.Triggers>-->
     
     <Grid x:Name="LayoutRoot"
           Background="Transparent">

main/MyFriendsAround.WP7/Views/MainPage.xaml.cs

@@ -1,9 +1,11 @@
 using System;
+using System.Security;
 using System.Windows;
 using GalaSoft.MvvmLight.Messaging;
 using GalaSoft.MvvmLight.Threading;
 using Microsoft.Phone.Controls;
 using Microsoft.Silverlight.Testing;
+using MyFriendsAround.WP7.Views;
 
 namespace MyFriendsAround.WP7
 {