c＃如果计时器的当前时间大于

Question

我收到一个gRPC响应流，如果在500ms后没有收到消息，我想调用一个动作。我打算使用秒表类，但它更适合调试，我担心它可能不是最有效的方法。我想在现有方法中做一些事情：

while (await streamingCall.ResponseStream.MoveNext(
                    default(CancellationToken)))
                {

                }

这样：

while (await streamingCall.ResponseStream.MoveNext(
                    default(CancellationToken)))
                {
                    //Message received
                    //Begin some sort of timer
                    //If no other message has been received for 500ms, execute ExampleMethod()
                }

Answer 1

每当收到消息时，您可以将DateTime分配给变量，并在Timer中从中减去旧时间，以查看自上次消息以来经过了多长时间：

DateTime LastMsgTime = DateTime.MinValue;
Timer timer = new Timer { Interval = 50, Enabled = false };
timer.Tick += (s,e) => 
{ 
    if((DateTime.Now- LastMsgTime).TotalMilliSeconds > 500)  
       {ExampleMethod(); timer.Enabled = false; }
};
while (await streamingCall.ResponseStream.MoveNext(
                    default(CancellationToken)))
                {
                     LastMsgTime = DateTime.Now;
                    //Message received
                    timer.Enabled = true;
                }