What would be best approach to execute a method multiple times parallel in C#

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Hi,

I would like to get some advice from the experts here on one of my requirements.
I need to run some tests on the devices which are connected to my system. My application should run the test method parallel for all the connected devices at a time and get result from each device. I have written a method for the test in to which I can pass the device id and need to get the test result after completion of each device's test.

Please let me know which would be the better way to implement this. The process is synchronous in my case and I am using C#/WPF.

What I have tried:

public data[] SomeMethod()
{
  return Enumerable.Range(0, 10)
      .AsParallel().AsOrdered()
      .Select(DeviceTestMethod).ToArray();
}

Posted 10-Jan-18 22:44pm

Sumith Peringathara

Updated 11-Jan-18 11:09am

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George Swan · Accepted Answer · 2018-01-11T11:09:00

I would use the async await framework to run the tests asynchronously.
Code a Device class that is able to run the TestDevice method asynchronously. Something like.

C#

public class Device
   {
       public async Task<Data[]> TestDeviceAsync()
       {
           //run the TestDevice method asynchronously
           return await Task.Run(() => TestDevice());
       }

       private Data[] TestDevice()
       {
           //test device and return results
           return new Data[6];
       }

   }

Then instantiate a TestManager class to run the required tests.

C#

public class TestManager
   {
       public async Task TestDevicesAsync()
       {
           var tasks = new List<Task<Data[]>>();
           for (int i = 0; i < 6; i++)
           {
               var device = new Device();
               //start each task off but don't await it
               //tasks are started by simply invoking the async method
               Task<Data[]> task = device.TestDeviceAsync();
               tasks.Add(task);
           }
           //await  for all theTasks to finish
           Data[][] testResults = await Task.WhenAll(tasks);
           foreach (var dataArry in testResults)
           {
               //do something with the results


           }
       }

   }