C#. Simple Parallel Example

Source

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


using System.IO;
using System.Threading;
using System.Drawing;

namespace Parallel2
{
    class Program
    {
        public static void Main()
        {
            // A simple source for demonstration purposes. Modify this path as necessary.
            String[] files = System.IO.Directory.GetFiles(@"C:\Users\YellowFriend\Desktop\Pics\Digital-Flame\01", "*.jpg");
            String newDir = @"C:\Users\YellowFriend\Desktop\Pics\Digital-Flame\01\Modified";
            System.IO.Directory.CreateDirectory(newDir);

            // Method signature: Parallel.ForEach(IEnumerable<TSource> source, Action<TSource> body)
            // Be sure to add a reference to System.Drawing.dll.
            Parallel.ForEach(files, (currentFile) =>
            {
                // The more computational work you do here, the greater 
                // the speedup compared to a sequential foreach loop.
                String filename = System.IO.Path.GetFileName(currentFile);
                var bitmap = new Bitmap(currentFile);

                bitmap.RotateFlip(RotateFlipType.Rotate180FlipNone);
                bitmap.Save(Path.Combine(newDir, filename));

                // Peek behind the scenes to see how work is parallelized.
                // But be aware: Thread contention for the Console slows down parallel loops!!!

                Console.WriteLine("Processing {0} on thread {1}", filename, Thread.CurrentThread.ManagedThreadId);
                //close lambda expression and method invocation
            });


            // Keep the console window open in debug mode.
            Console.WriteLine("Processing complete. Press any key to exit.");
            Console.ReadKey();
        }
    }
}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.IO;

using System.Threading;

using System.Drawing;

namespace Parallel2

{

class Program

{

public static void Main()

{

// A simple source for demonstration purposes. Modify this path as necessary.

String[] files = System.IO.Directory.GetFiles(@"C:\Users\YellowFriend\Desktop\Pics\Digital-Flame\01", "*.jpg");

String newDir = @"C:\Users\YellowFriend\Desktop\Pics\Digital-Flame\01\Modified";

System.IO.Directory.CreateDirectory(newDir);

// Method signature: Parallel.ForEach(IEnumerable<TSource> source, Action<TSource> body)

// Be sure to add a reference to System.Drawing.dll.

Parallel.ForEach(files, (currentFile) =>

{

// The more computational work you do here, the greater

// the speedup compared to a sequential foreach loop.

String filename = System.IO.Path.GetFileName(currentFile);

var bitmap = new Bitmap(currentFile);

bitmap.RotateFlip(RotateFlipType.Rotate180FlipNone);

bitmap.Save(Path.Combine(newDir, filename));

// Peek behind the scenes to see how work is parallelized.

// But be aware: Thread contention for the Console slows down parallel loops!!!

Console.WriteLine("Processing {0} on thread {1}", filename, Thread.CurrentThread.ManagedThreadId);

//close lambda expression and method invocation

});

// Keep the console window open in debug mode.

Console.WriteLine("Processing complete. Press any key to exit.");

Console.ReadKey();

}

C#. Simple Parallel Example

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