Getting connection message as Disconnected and while trying to send message getting exception.

[DhavalRKansara]

I run your Chat client/server example but at home screen, I am getting the message as disconnected and while I try to send message getting below exceptions.

[VERBOSE-2:ui_dart_state.cc(148)] Unhandled Exception: Cannot start a connection that is not in the 'Disconnected' state.
#0      HubConnection.start (package:signalr_client/hub_connection.dart:103:5)
<asynchronous suspension>
#1      ChatPageViewModel.openChatConnection (package:chatclient/views/pages/chatPageViewModel.dart:63:28)
<asynchronous suspension>
#2      ChatPageViewModel.sendChatMessage (package:chatclient/views/pages/chatPageViewModel.dart:72:11)
<asynchronous suspension>
#3      _MessageComposeViewState.build.<anonymous closure> (package:chatclient/views/pages/chatPage.dart:136:35)
#4      _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:654:14)
#5      _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:729:32)
#6      GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:182:24)
#7      TapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:365:11)
#8      TapGestureRecognizer.handlePrim<…>

My Home screen:

[edihasaj]

The problem is in this part of the code, when the hub connection is starting is not setting _connectionsIsOpen to true, then the state is connected but _connectionIsOpen is not.

if (_hubConnection.state != HubConnectionState.Connected) {
await _hubConnection.start();
_connectionIsOpen = true;
}

I set the _conncetionIsOpen = true above the hub connection start and it works but this is not a good solution, because the connection cannot start for whatever reason, you should validate it first

if (_hubConnection.state != HubConnectionState.Connected) {
_connectionIsOpen = true;
await _hubConnection.start();
}