Page 123 - CSharp/C#

}

// execution of our time intensive Method
private void BwDoWork(object sender, DoWorkEventArgs e)
{
e.Result = TimeintensiveMethod(e.Argument);
}

private int TimeintensiveMethod(object file)
{
Console.WriteLine("Start TimeintensiveMethod.");

// Do some time intensive calculations...
using (StreamReader reader = new StreamReader(file.ToString()))
{
string s = reader.ReadToEnd();

for (int i = 0; i < 10000; i++)
s.GetHashCode();
}
Console.WriteLine("End TimeintensiveMethod.");

// return something as a "result"
return new Random().Next(100);
}

Task

See below for a simple example of how to use a Task to do some time intensive stuff in a
background process.

All you need to do is wrap your time intensive method in a Task.Run() call.

public void ProcessDataAsync()
{
// Start the time intensive method
Task<int> t = Task.Run(() => TimeintensiveMethod(@"PATH_TO_SOME_FILE"));

// Control returns here before TimeintensiveMethod returns
Console.WriteLine("You can read this while TimeintensiveMethod is still running.");

Console.WriteLine("Count: " + t.Result);
}

private int TimeintensiveMethod(object file)
{
Console.WriteLine("Start TimeintensiveMethod.");

// Do some time intensive calculations...
using (StreamReader reader = new StreamReader(file.ToString()))
{
string s = reader.ReadToEnd();

for (int i = 0; i < 10000; i++)
s.GetHashCode();
}
Console.WriteLine("End TimeintensiveMethod.");

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