C#拼图游戏编写代码（2）

 public enum Diff //游戏难度
 {
  simple,//简单
  ordinary,//普通
  difficulty//困难
 } 

 switch(this._gameDif)
  {
  case Diff.simple:　　　　//简单则单元格数组保存为3*3的二维数组
   this.N = 3;
   node=new Node[3,3];
   break;
  case Diff.ordinary:　　 //一般则为5*5
   this.N = 5;
   node = new Node[5, 5];
   break;
  case Diff.difficulty:　　//困难则为9*9
   this.N = 9;
   node = new Node[9, 9];
   break;
  }

 //分割图片形成各单元保存在数组中
  int Count = 0;
  for (int x = 0; x < this.N; x++)
  {
  for (int y = 0; y < this.N; y++)
  {

   node[x, y].Img = CaptureImage(this._img, this.Width / this.N, this.Width / this.N, x * (this.Width / this.N), y * (this.Width / this.N));
   node[x, y].Num = Count;
   Count++;
  }
  }

//创建新图位图 
 Bitmap bitmap = new Bitmap(width, height);
//创建作图区域 
Graphics graphic = Graphics.FromImage(bitmap);
//截取原图相应区域写入作图区 
 graphic.DrawImage(fromImage, 0, 0, new Rectangle(x, y, width, height), GraphicsUnit.Pixel);
//从作图区生成新图 
 Image saveImage = Image.FromHbitmap(bitmap.GetHbitmap());

/// <summary>
 /// 移动坐标（x,y）拼图单元
 /// </summary>
 /// <param name="x">拼图单元x坐标</param>
 /// <param name="y">拼图单元y坐标</param>
 public bool Move(int x,int y)
 {
  //MessageBox.Show(" " + node[2, 2].Num);
  if (x + 1 != N && node[x + 1, y].Num == N * N - 1)
  {
  Swap(new Point(x + 1, y), new Point(x, y));
  return true;
  }
  if (y + 1 != N && node[x, y + 1].Num == N * N - 1)
  {
  Swap(new Point(x, y + 1), new Point(x, y));
  return true;
  }  
  if (x - 1 != -1 && node[x - 1, y].Num == N * N - 1)
  {
  Swap(new Point(x - 1, y), new Point(x, y));
  return true;
  } 
  if (y - 1 != -1 && node[x, y - 1].Num == N * N - 1)
  {
  Swap(new Point(x, y - 1), new Point(x, y));
  return true;
  }
  return false;
  
 }

 //交换两个单元格
 private void Swap(Point a, Point b)
 {
  Node temp = new Node();
  temp = this.node[a.X, a.Y];
  this.node[a.X, a.Y] = this.node[b.X, b.Y];
  this.node[b.X, b.Y] = temp;
 }

/// <summary>
 /// 打乱拼图
 /// </summary>
 public void Upset()
 {
  int sum = 100000;
  if (this._gameDif == Diff.simple) sum = 10000;
  //if (this._gameDif == Diff.ordinary) sum = 100000;
  Random ran = new Random();
  for (int i = 0, x = N - 1, y = N - 1; i < sum; i++)
  {
  long tick = DateTime.Now.Ticks;
  ran = new Random((int)(tick & 0xffffffffL) | (int)(tick >> 32)|ran.Next());
  switch (ran.Next(0, 4))
  {
   case 0:
   if (x + 1 != N)
   {
    Move(x + 1, y);
    x = x + 1;
   }
    
   break;
   case 1:
   if (y + 1 != N)
   {
    Move(x, y + 1);
    y = y + 1;
   } 
   break;
   case 2:
   if (x - 1 != -1)
   {
    Move(x - 1, y);
    x = x - 1;
   } 
   break;
   case 3:
   if (y - 1 != -1)
   {
    Move(x, y - 1);
    y = y - 1;
   }
   break;
  }

  }
 }

 public Image Display()
 {
  Bitmap bitmap = new Bitmap(this.Width, this.Width);
  //创建作图区域 
  Graphics newGra = Graphics.FromImage(bitmap);
  for (int x = 0; x < this.N; x++)
  for (int y = 0; y < this.N; y++)
   newGra.DrawImage(node[x, y].Img, new Point(x * this.Width / this.N, y * this.Width / this.N));
  return bitmap;
 }

 public bool Judge()
 {
  int count=0;
  for (int x = 0; x < this.N; x++)
  {
  for (int y = 0; y < this.N; y++)
  {
   if (this.node[x, y].Num != count)
   return false;
   count++;
  }
  }
  return true;
 }


 

 private void pictureBox1_MouseClick(object sender, MouseEventArgs e)
 {
  if (puzzle.Move(e.X / (puzzle.Width / puzzle.N), e.Y / (puzzle.Width / puzzle.N)))
  {
  Num++;
  pictureBox1.Image = puzzle.Display();
  if (puzzle.Judge())
  { 
   if (MessageBox.Show("恭喜过关", "是否重新玩一把", MessageBoxButtons.OKCancel) == DialogResult.OK)
   {
   Num = 0;
   puzzle.Upset();
   pictureBox1.Image = puzzle.Display();
   
   }
   else
   {
   Num = 0;
   closefather();
   this.Close();
   }

  }

  }
  NumLabel.Text = Num.ToString();
 }