Divide the image in to multiple 8*8 blocks in C#

The below answers would help you.

1. Cut an Image into 9 pieces C#[^]
2. code to split an image into tiles of equal dimensions[^]

Hello Kasthuri,
I have developed simple 3 x 3 slider puzzle game and here is the method that should give You an idea how to divide image into 3 x 3 tiles. If You analize it, there should not be a problem to change program code to divide image to 8 x 8 tiles.

Original free open source program code is at this Url adress :
Game Puzzle - Perić Željko Smederevo[^]

void Initialize_Tiles()
      {
          //
          // Cut original image to nine rectangular peaces
          // that have identical dimensions and set them to
          // the elements of table 'Puzzle_Tiles'.
          //
          // Placed by it's indexes on fixed positions
          // inside Puzzle_Table, in the below shown order,
          // they constitute original image.
          //
          //       1 2 3
          //       4 5 6
          //       7 8 9
          //

          // Original image
          Bitmap Original_Image;

          // Original image pixel format
          PixelFormat Pixel_Format;

          // Tile rectangle
          RectangleF Tile;

          int Tile_Height;// Tile height
          int Tile_Width; // Tile width

          // Set new original image and it's pixel format
          Original_Image = new Bitmap(BackgroundImage);
          Pixel_Format = Original_Image.PixelFormat;

          // Set new Tile
          Tile_Height = Original_Image.Height/3;
          Tile_Width = Original_Image.Width/3;

          Tile = new RectangleF();

          Tile.Width  = Tile_Width;
          Tile.Height = Tile_Height;

          //
          // Set values to elements of table Puzzle_Tiles
          //

          // 0. Tile, empty tile
          Puzzle_Tiles[0].Image = null;

          // 1. Tile
          Tile.X = 0;
          Tile.Y = 0;
          Puzzle_Tiles[1].Image = Original_Image.Clone(Tile,Pixel_Format);

          // 2. Tile
          Tile.X = Tile_Width;
          Tile.Y = 0;
          Puzzle_Tiles[2].Image = Original_Image.Clone(Tile,Pixel_Format);

          // 3. Tile
          Tile.X = 2*Tile_Width;
          Tile.Y = 0;
          Puzzle_Tiles[3].Image = Original_Image.Clone(Tile,Pixel_Format);

          // 4. Tile
          Tile.X = 0;
          Tile.Y = Tile_Height;
          Puzzle_Tiles[4].Image = Original_Image.Clone(Tile,Pixel_Format);

          // 5. Tile
          Tile.X = Tile_Width;
          Tile.Y = Tile_Height;
          Puzzle_Tiles[5].Image = Original_Image.Clone(Tile,Pixel_Format);

          // 6. Tile
          Tile.X = 2*Tile_Width;
          Tile.Y = Tile_Height;
          Puzzle_Tiles[6].Image = Original_Image.Clone(Tile,Pixel_Format);

          // 7. Tile
          Tile.X = 0;
          Tile.Y = 2*Tile_Height;
          Puzzle_Tiles[7].Image = Original_Image.Clone(Tile,Pixel_Format);

          // 8. Tile
          Tile.X = Tile_Width;
          Tile.Y = 2*Tile_Height;
          Puzzle_Tiles[8].Image = Original_Image.Clone(Tile,Pixel_Format);

          // 9. Tile
          Tile.X = 2*Tile_Width;
          Tile.Y = 2*Tile_Height;
          Puzzle_Tiles[9].Image = Original_Image.Clone(Tile,Pixel_Format);
      }

As You can notice there is a Table Puzzle_Tiles, one dimenzional Array, type of PictureBox with its instance Image, that is used for memorizing smaler peaces of original image. Its declaration is at the begining of main class and it is a global variable :

// Table 'Puzzle_Tiles'  contains nine
// pictures cropped from original image.
PictureBox [] Puzzle_Tiles;

And initialization at Initialize_Tables method see original program code at Game Puzzle - Perić Željko Smederevo[^] :

int position;

// Table 'Puzzle_Tiles'  contains nine
// pictures cropped from original image.
Puzzle_Tiles = new PictureBox[10];
Puzzle_Tiles.Initialize();

// Set initial values for table elements
position = 0;
for(position=0;position<10;position++)
{
    Puzzle_Tiles[position] = new PictureBox();
    Puzzle_Tiles[position].Image = null;
}

I think that this is enough for You to solve the problem.
All the best,
Željko Perić