I perform an event when start the countdown 30 s
1. Complete, seconds finished walk next
2. Not completed, 30 s timeout, return
Whether to use multithreading
How to write bosses, please give a thought or write a simple demo

CodePudding user response:

The master thread a open and timing
After the 30 s, read a thread return value, if not returned, the return to time out

CodePudding user response:

Bool ret=Task. WaitAny (Task, 30000)

CodePudding user response:

"Perform an event"? Events usually don't mean that, or this actually has nothing to do with events,

Give you write a detection timeout demo:

 using System; 
Using System. The Threading; 
Using System. The Threading. The Tasks; 

The namespace ConsoleApp1 
{
Class Program 
{
The static async Task Main (string [] args) 
{
for (var i=0; i <20; I++) 
{
Var r=await test (); 
Console. WriteLine (return to {$" (r==1? "Timeout" : r.T oString ())} "); 
} 
} 

Private static async Task The test () 
{
Var n=new Random (). The Next (500); 
Var t1=Task. Delay (300); 

Var t2=Task. Run (()=& gt; Thread.sleep (n));//the custom task 
//var t2=Task. Run (async ()=& gt; Await Task. Delay (n)); 

Var t=await Task. WhenAny (t1, t2); 
If (t==t1) 
return -1; 
The else 
return n; 
} 
} 
}