C# SendAysnc 超时

 

业务方法

@@@code

public override async Task<List<(IPEndPoint endPoint, byte[] data)>> SendAsync(IPEndPoint server, byte[] data2, int getResponseCount = 1)

{

//随机使用端口,支持并发

using (UdpClient udpClient = new UdpClient(LocalIPEndPoint)) //广播包在有虚拟机的时候必须指定有效网卡

{ //多网卡容易丢包

udpClient.Client.SendTimeout = SendTimeout;

udpClient.Client.ReceiveTimeout = ReceiveTimeout;

byte[] data = IsEncrypt ? Encrypt(data2) : data2;

try

{

int sendLength = await udpClient.SendAsync(data, data.Length, server);

//int sendLength = 0;

//udpClient.SendAsync(data, data.Length, server).Wait(SendTimeout); //同步方法

Log?.Invoke($"send:{server.ToString()},Len:{sendLength}/{data.Length},Data:{new Q.Mina.IoBuffer(data).getHexDump()}");

 

udpClient.Close();

return result;

}

catch (Exception ex)

{

return null;

}

}

 

}

 

 

@@#

对上述方法调用,可以使用三种方式

异步,业务方法正常执行,超时处理正常,推荐使用此方法

@@@code

var result = await new Q.Sockets.UDPHelper2() { LocalIPEndPoint = localIP, ReceiveTimeout = 1000 }.SendAsync(ip, data, 1000);

@@#

 

同步,超时未生效,一直处于等待状态,除非方法内使用udpClient.SendAsync(data, data.Length, server).Wait(SendTimeout); //同步方法

@@@code

new Q.Sockets.UDPHelper2() { LocalIPEndPoint = localIP, ReceiveTimeout=1000 }.SendAsync(ip, data, 1000).Result

@@#

 

 

等待指定时间,强行在外部指定超时,打断了业务方法的执行时间(如接收大量数据)

@@@code

var x = new Q.Sockets.UDPHelper2() { LocalIPEndPoint = localIP, ReceiveTimeout = 1000 }.SendAsync(ip, data, 1000);

x.Wait(3000);

if (x.IsCompleted)

{

show(x.Result);

}

 

@@#

 

posted @ 2019-10-17 17:35  秦秋随  阅读(1107)  评论(0编辑  收藏  举报