C# 无效的跨线程访问Windows Azure

我正在使用Windows Azure移动服务开发Windows Phone 8应用程序

我有以下代码：

private async void appBarButton1_Click(object sender, EventArgs e)
    {
        var table = App.MobileService.GetTable<ChatRoomOverview.chatrooms>();
        //TODO 
        List<ChatRoomOverview.chatrooms> ChatRooms = await table.Where(chat => chat.chatroomName == ChatroomName.Text).ToListAsync();
        if (ChatRooms.Count() < 1)
        {
            ChatRoomOverview.chatrooms ChatRoom = new ChatRoomOverview.chatrooms { chatroomName = ChatroomName.Text, Created = DateTime.Today.Date.ToString(), content = ChatRoomOverview.userName + "|:::|" + FirstPost.Text + "|::|::|", LastPost = FirstPost.Text + "|::|::|", tag1 = tag1.Text, tag2 = tag2.Text, tag3 = tag3.Text, isPrivate = isPrivateCheck.IsChecked.Value, userName = ChatRoomOverview.userName, Popular = "0" };

            await table.InsertAsync(ChatRoom);
            long tempID =ChatRoom.Id;
            await subscripeToNewChatRoom(tempID);

            NavigationService.Navigate(new Uri("/ChatRoomOverview.xaml", UriKind.Relative));
        }
        else
        {
            MessageBox.Show("This Chatroom is allready created go to Search and check it out :)", "Chatroom Exists!", MessageBoxButton.OK);
        }
    }

private async void appBarButton1\u单击（对象发送方，事件参数e）
{
var table=App.MobileService.GetTable（）；
//待办事项
列出聊天室=等待表。其中（chat=>chat.chatroomName==chatroomName.Text）。toListSync（）；
if（chattrooms.Count（）<1）
{
ChatRoomOverview.chatrooms chatrooms=新建ChatRoomOverview.chatrooms{chatroomName=chatroomName.Text，Created=DateTime.ToString（），content=ChatRoomOverview.userName+“|：：：：：：：：；”，LastPost=FirstPost.Text+“：：：：：：；”，tag1=tag1.Text，tag2=tag2.Text，tag3=tag3.Text，isPrivate=isPrivateCheck.IsChecked.Value，userName=ChatRoomOverview.userName，Popular=“0”}；
等待表。插入同步（聊天室）；
long tempID=ChatRoom.Id；
等待订阅文件室（临时ID）；
NavigationService.Navigate（新Uri（“/ChatRoomOverview.xaml”，UriKind.Relative））；
}
其他的
{
Show（“此聊天室已准备就绪，请转到搜索并签出：），“聊天室已存在！”，MessageBoxButton.OK）；
}
}

上面的代码是在用户想要创建聊天室时执行的。这里一切正常。但在我新的应用程序迭代中，我想实现pushnotification，因此我想使用subscription表。这在SubscribeTonewchatRoom函数中介绍。它的变量是在插入聊天室项目时给出的聊天室的已发布ID。此值存在且正确

    private System.Threading.Tasks.Task subscripeToNewChatRoom(long tempID)
    {
        ChatRoomOverview.Subscription Subscription = new ChatRoomOverview.Subscription { ContentID = Convert.ToInt32(tempID), userId = App.UserInfromationID };
        **ERROR** App.MobileService.GetTable<ChatRoomOverview.Subscription>().InsertAsync(Subscription);
        return null;
    }

private System.Threading.Tasks.Task subscribetOneWChatRoom（长tempID）
{
ChatRoomOverview.Subscription Subscription=newchatroomoverview.Subscription{ContentID=Convert.ToInt32（tempID），userId=App.userinfomation}；
**错误**App.MobileService.GetTable（）.InsertAsync（订阅）；
返回null；
}

然后执行上述代码以插入订阅。这段代码在代码中的其他地方也可以使用，所以我不明白错误是什么。但是错误发生在我在代码中写入错误的地方。问题的底部是一个完全例外

所以我不明白为什么我得到了无效的跨线程访问

额外的 好的，根据Jaishind的回答和评论，我想出了下面的代码。我现在可以看到，与我交互的表得到了正确的数据。但我还是有例外

private async void bwSubscription_DoWork(object sender, DoWorkEventArgs e)
    {
        List<object> genericlist = e.Argument as List<object>;

        var table = await App.MobileService.GetTable<ChatRoomOverview.chatrooms>();
        //List<ChatRoomOverview.chatrooms> ChatRooms = table.Where(chat => chat.chatroomName == ChatroomName.Text)

        //table.InsertAsync(ChatRoom);
        ChatRoomOverview.chatrooms chat = (ChatRoomOverview.chatrooms)genericlist[0];
        //var ChatRoom = table.Where(chatting => chatting.chatroomName == chat.chatroomName).ToListAsync();

        long tempID = chat.Id;

        ChatRoomOverview.Subscription Subscription = new ChatRoomOverview.Subscription { ContentID = tempID, userId = App.UserInfromationID };
        await App.MobileService.GetTable<ChatRoomOverview.Subscription>().InsertAsync(Subscription);
    }

private async void bwSubscription\u DoWork（对象发送方，DoWorkEventArgs e）
{
List genericlist=e.参数为List；
var table=wait App.MobileService.GetTable（）；
//列表聊天室=表.Where（chat=>chat.chatroomName==chatroomName.Text）
//表.InsertAsync（聊天室）；
ChatRoomOverview.chatrooms chat=（ChatRoomOverview.chatrooms）常规列表[0]；
//var ChatRoom=table.Where（chatting=>chatting.chatroomName==chat.chatroomName.toListSync（）；
long tempID=chat.Id；
ChatRoomOverview.Subscription订阅=新建ChatRoomOverview.Subscription{ContentID=tempID，userId=App.userinfomation}；
等待App.MobileService.GetTable（）.InsertAsync（订阅）；
}

但是在插入try/catch时，为了处理未发生的异常，该项将不会插入azure表中

工作解决方案

    private async void bwSubscription_DoWork(object sender, DoWorkEventArgs e)
    {
        bool subscriped = false;
        List<object> genericlist = e.Argument as List<object>;

        var table = App.MobileService.GetTable<ChatRoomOverview.chatrooms>();
        //List<ChatRoomOverview.chatrooms> ChatRooms = table.Where(chat => chat.chatroomName == ChatroomName.Text)

        //table.InsertAsync(ChatRoom);
        ChatRoomOverview.chatrooms chat = (ChatRoomOverview.chatrooms)genericlist[0];
        //var ChatRoom = table.Where(chatting => chatting.chatroomName == chat.chatroomName).ToListAsync();

        long tempID = chat.Id;
        while (!subscriped)
        {
            try
            {
                ChatRoomOverview.Subscription Subscription = new ChatRoomOverview.Subscription { ContentID = tempID, userId = App.UserInfromationID , Notifications = 0};
                await App.MobileService.GetTable<ChatRoomOverview.Subscription>().InsertAsync(Subscription);
            }
            catch
            {

            }
            List<ChatRoomOverview.Subscription> subscript = await App.MobileService.GetTable<ChatRoomOverview.Subscription>().Where(subs => subs.ContentID == tempID && subs.userId == App.UserInfromationID && subs.Notifications == 0).ToListAsync();
            if (subscript.Count > 0)
            {
                ChatRoomOverview.userName = "";
                subscriped = true;
            }
            else
            {
                subscriped = false;
            }
        }

    }

private async void bwSubscription\u DoWork（对象发送方，DoWorkEventArgs e）
{
bool subscribed=false；
List genericlist=e.参数为List；
var table=App.MobileService.GetTable（）；
//列表聊天室=表.Where（chat=>chat.chatroomName==chatroomName.Text）
//表.InsertAsync（聊天室）；
ChatRoomOverview.chatrooms chat=（ChatRoomOverview.chatrooms）常规列表[0]；
//var ChatRoom=table.Where（chatting=>chatting.chatroomName==chat.chatroomName.toListSync（）；
long tempID=chat.Id；
而（！订阅）
{
尝试
{
ChatRoomOverview.Subscription订阅=新建ChatRoomOverview.Subscription{ContentID=tempID，userId=App.UserInfoomatiod，Notifications=0}；
等待App.MobileService.GetTable（）.InsertAsync（订阅）；
}
抓住
{
}
List subscript=await App.MobileService.GetTable（）。其中（subs=>subs.ContentID==tempID&&subs.userId==App.userinforomationId&&subs.Notifications==0）。ToListSync（）；
如果（下标计数>0）
{
ChatRoomOverview.userName=“”；
下标=真；
}
其他的
{
下标=假；
}
}
}

我的全部例外情况

• $exception{System.UnauthorizedAccessException:无效的跨线程访问。 在MS.Internal.XcpImports.CheckThread（）处 位于MS.Internal.XcpImports.MessageBox\u ShowCore（字符串MessageBox文本、字符串标题、UInt32类型） 在System.Windows.MessageBox.ShowCore（字符串messageBoxText、字符串标题、MessageBoxButton按钮） 在System.Windows.MessageBox.Show（字符串messageBoxText） 在ChatRoom.App.CurrentChannel_ShellToastNotificationReceived（对象发送方，NotificationEventArgs e） 在Microsoft.Phone.Notification.ShellObjectChannelInternals.OnNotificationReceived（IntPtr blob，UInt32 blobSize）中 位于Microsoft.Phone.Notification.ShellObjectChannelInternals.ChannelHandler（UInt32事件类型、IntPtr blob1、UInt32 blobSize1、IntPtr blob2、UInt32 blobSize2） 位于Microsoft.Phone.Notification.HttpNotificationChannel.Dispatch（对象线程上下文） 位于System.Threading.QueueUserWorkItemCallback.WaitCallback_上下文（对象状态） 位于System.Threading.ExecutionContext.RunInternal（ExecutionContext exe

  private subscripeToNewChatRoom(long tempID)
              {
                  ChatRoomOverview.Subscription Subscription = new ChatRoomOverview.Subscription { ContentID = Convert.ToInt32(tempID), userId = App.UserInfromationID };
           Dispatcher.BeginInvoke(() =>
                          {
          App.MobileService.GetTable<ChatRoomOverview.Subscription>().InsertAsync(Subscription);
                          });
  
                  return null;
              }
  

  private async void bwSubscription_DoWork(object sender, DoWorkEventArgs e)
  {
      bool subscriped = false;
      List<object> genericlist = e.Argument as List<object>;
  
      var table = App.MobileService.GetTable<ChatRoomOverview.chatrooms>();
      //List<ChatRoomOverview.chatrooms> ChatRooms = table.Where(chat => chat.chatroomName == ChatroomName.Text)
  
      //table.InsertAsync(ChatRoom);
      ChatRoomOverview.chatrooms chat = (ChatRoomOverview.chatrooms)genericlist[0];
      //var ChatRoom = table.Where(chatting => chatting.chatroomName == chat.chatroomName).ToListAsync();
  
      long tempID = chat.Id;
      while (!subscriped)
      {
          try
          {
              ChatRoomOverview.Subscription Subscription = new ChatRoomOverview.Subscription { ContentID = tempID, userId = App.UserInfromationID , Notifications = 0};
              await App.MobileService.GetTable<ChatRoomOverview.Subscription>().InsertAsync(Subscription);
          }
          catch
          {
  
          }
          List<ChatRoomOverview.Subscription> subscript = await App.MobileService.GetTable<ChatRoomOverview.Subscription>().Where(subs => subs.ContentID == tempID && subs.userId == App.UserInfromationID && subs.Notifications == 0).ToListAsync();
          if (subscript.Count > 0)
          {
              ChatRoomOverview.userName = "";
              subscriped = true;
          }
          else
          {
              subscriped = false;
          }
      }
  
  }