如何增加信号2.2.2中的消息大小

我使用signalr 2.2.2将当前html发送到signalr服务器托管进程以转换为pdf,同时在客户端显示一个进度条。问题是信号器的最大消息限制为64kb。我该如何增加?下面是我的websocket传输跟踪日志。目标和汇编。net framework是4.5版本,因此Signar使用WebSocket来实现这一点。

信号机。运输。TransportHeartBeat信息:0:连接2a307c4b-1ef6-4334-a3ef-875e0167ed75是新的。 信号机。运输。WebSocketTransport详细信息:0:正在发送传出消息。连接id:2a307c4b-1ef6-4334-a3ef-875e0167ed75,传输:WebSocketTransport,消息:{“C”:“d-3FF6BE97-B,0 | C,0 | d,1”,“S”:1,“M”:[]} 信号机。运输。TransportHeartBeat信息:0:删除连接2a307c4b-1ef6-4334-a3ef-875e0167ed75 信号机。运输。WebSocketTransport详细:0:DrainWrites(2a307c4b-1ef6-4334-a3ef-875e0167ed75) 信号机。运输。TransportHeartBeat信息:0:连接58e58295-77a1-48d7-bac3-5e7fcbb51073是新的。 信号机。运输。WebSocketTransport详细信息:0:正在发送传出消息。连接id:58e58295-77a1-48d7-bac3-5e7fcbb51073,传输:WebSocketTransport,消息:{“C”:“d-3FF6BE97-B,0 | E,0 | F,1”,“S”:1,“M”:[]} ---来自引发异常的前一个位置的堆栈结束跟踪--- at系统。运行时。编译器服务。任务等待者。ThrowForNonSuccess(任务任务) 信号机。运输。WebSocketTransport信息:0:CloseSocket(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。WebSocketTransport信息:0:结束(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。WebSocketTransport详细:0:取消(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。WebSocketTransport信息:0:CompleteRequest(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073) 信号机。运输。TransportHeartBeat详细:0:KeepAlive(58e58295-77a1-48d7-bac3-5e7fcbb51073)