我TCPClient
用来连接到设备并以字符串形式获取一些数据,然后我试图将数据保存到数据库并获取
“无法访问已处置的对象”错误。”
也许问题是因为我试图从异步回调函数保存到数据库?请看一下,这里有两个函数:第一个获取网络流,已经连接到设备并开始读取数据,第二个是回调:
private void ReadDataAsync(NetworkStream nwStream)
{
byte[] buffer = new byte[1024];
messageStream mStream = new messageStream(nwStream, buffer);
if (nwStream.CanRead)
{
Console.WriteLine("Starting async");
nwStream.BeginRead(buffer, 0, buffer.Length,
new AsyncCallback(OnReadEndAsync), mStream);
}
else
{
Console.WriteLine("Cannot read stream");
}
}
private void OnReadEndAsync(IAsyncResult result)
{
String message = "";
messageStream mStream = (messageStream)result.AsyncState;
int incDataSize = mStream.nwStream.EndRead(result);
message = Encoding.ASCII.GetString(mStream.buffer, 0, incDataSize);
List<Event> events = new List<Event>();
events = ProcessMessage(message);
if(events.Any())
_repo.saveEventsToDB(events);
if (mStream.nwStream.CanRead)
{
mStream.nwStream.BeginRead(mStream.buffer, 0, mStream.buffer.Length,
new AsyncCallback(OnReadEndAsync), mStream);
}
}