本文是利用C# 實現中國象棋的棋盤繪製，以及初始化佈局，並不實現中國象棋的對弈邏輯。僅供學習參考使用。

思路：

1. 繪製中國象棋棋盤，豎線九條，橫線十條。再中間繪製‘楚河'，‘漢界' 。
2. 繪製棋子，然後將棋子佈局在棋盤上即可。
   

涉及知識點：

1. 使用者控制元件：用於實現棋盤的繪製，重寫 OnPaint(PaintEventArgs e) 方法。
2. Matrix：封裝表示幾何變換的 3x3 仿射矩陣。本例中主要用於旋轉繪製反方的‘漢界'。
3. GraphicsPath：表示一系列相互連線的直線和曲線。本例中主要用於繪製圓形棋子。
   

效果圖如下：

（一）

（二）

核心程式碼

棋盤核心程式碼如下：

protected override void OnPaint(PaintEventArgs e)
  {
   base.OnPaint(e);

   //初始化陣列
   InitArrPieceInfo();

   Graphics g = e.Graphics;
   int width = this.Width;
   int height = this.Height;
   int padding = this.Padding.All * 20;
   int center = height / 2;//垂直中心位置
   int s_width = (width - 2 * padding) / 8;//每一條橫線的間距
   int s_heigth = (height - 2 * padding) / 9;//每一條豎線的間距
   int start_x = padding;//起始位置
   int start_y = padding;//起始位置
   Pen pen = new Pen(Brushes.Black,1.5f);
   Dictionary<string,string[]> dicNums = new Dictionary<string,string[]>();
   dicNums.Add("up",new string[9] { "1","2","3","4","5","6","7","8","9" });
   dicNums.Add("down",new string[9] { "九","八","七","六","五","四","三","二","一" });
   Font font = new Font("宋體",12,FontStyle.Regular);
   for (int i = 0; i < 9; i++)
   {
    //豎線九條
    Point p0 = new Point(start_x + i * s_width,start_y);
    Point p1 = new Point(start_x + i * s_width,start_y + (s_heigth * 4));
    Point p2 = new Point(start_x + i * s_width,start_y + (s_heigth * 5));
    Point p3 = new Point(start_x + i * s_width,start_y + (s_heigth * 9));
    g.DrawLine(pen,p0,p1);
    g.DrawLine(pen,p2,p3);
    //上下的文字
    Point p_up = new Point(start_x + i * s_width - 5,padding / 2);
    Point p_down = new Point(start_x + i * s_width - 5,start_y + (s_heigth * 9) + padding / 3);
    g.DrawString(dicNums["up"][i],font,Brushes.Black,p_up);
    g.DrawString(dicNums["down"][i],p_down);
    //陣列賦值
    for (int j = 0; j < 10; j++)
    {
     Point absLocation = ArrPiece[i,j].AbsoluteLocation;
     absLocation.X = start_x + i * s_width;
     ArrPiece[i,j].AbsoluteLocation = absLocation;
    }
   }
   for (int i = 0; i < 10; i++)
   {
    //橫線十條
    Point p0 = new Point(start_x,start_y + i * s_heigth);
    Point p1 = new Point(start_x + s_width * 8,start_y + i * s_heigth);
    g.DrawLine(pen,p1);
    //陣列賦值
    for (int j = 0; j < 9; j++)
    {
     Point absLocation = ArrPiece[j,i].AbsoluteLocation;
     absLocation.Y = start_y + i * s_heigth;
     ArrPiece[j,i].AbsoluteLocation = absLocation;
    }
   }
   //繪製九宮格
   for (int i = 0; i < 2; i++)
   {
    Point p0 = new Point(start_x + (3 + i * 2) * s_width,start_y);
    Point p1 = new Point(start_x + (5 - i * 2) * s_width,start_y + (s_heigth * 2));
    Point p2 = new Point(start_x + (3 + i * 2) * s_width,start_y + (s_heigth * 7));
    Point p3 = new Point(start_x + (5 - i * 2) * s_width,p3);
   }

   //兵和卒處有拐角，從左往右
   for (int i = 0; i < 5; i++)
   {
    int p_x = start_x + 2 * i * s_width;
    int p_y = start_y + 3 * s_heigth;
    DrawCorner(g,pen,p_x,p_y);//兵
    p_y = start_y + 6 * s_heigth;
    DrawCorner(g,p_y);//卒
   }
   //炮處的拐角，從左往右
   for (int i = 0; i < 2; i++)
   {
    int p_x = start_x + (1 + 6 * i) * s_width;
    int p_y = start_y + 2 * s_heigth;
    DrawCorner(g,p_y);//炮
    p_y = start_y + 7 * s_heigth;
    DrawCorner(g,p_y);//炮
   }
   //繪製楚河漢界
   Point p_0 = new Point(2 * s_width,center - 25);
   Point p_1 = new Point(7 * s_width,center + 20);
   font = new Font("方正隸二繁體",30,FontStyle.Regular);
   g.DrawString("楚河",p_0);
   Matrix mtxSave = g.Transform;
   Matrix mtxRotate = g.Transform;
   mtxRotate.RotateAt(180,p_1);
   g.Transform = mtxRotate;
   g.DrawString("漢界",p_1);
   g.Transform = mtxSave;
   //繪製外邊框
   g.DrawRectangle(pen,3,width - 6,height - 6);
   g.DrawRectangle(pen,5,width - 10,height - 10);
   g.DrawRectangle(pen,7,width - 14,height - 14);
  }

棋子核心程式碼如下：

protected override void OnPaint(PaintEventArgs e)
  {
   base.OnPaint(e);
   Graphics g = e.Graphics;
   GraphicsPath gPath = new GraphicsPath();
   // Set a new rectangle to the same size as the button's ClientRectangle property.
   Rectangle rectangle = this.ClientRectangle;
   g.DrawEllipse(new Pen(this.FlatAppearance.BorderColor),rectangle);
   gPath.AddEllipse(rectangle);

   // Set the button's Region property to the newly created circle region.
   this.Region = new Region(gPath);
   Rectangle inRect = new Rectangle(2,2,this.Width - 4,this.Height - 3);
   g.FillEllipse(new SolidBrush(this.BackColor),rectangle);
   g.DrawEllipse(new Pen(Color.Black,2),inRect);

   Font font = new Font("楷體",25,FontStyle.Regular);
   g.DrawString(this.Text,new SolidBrush(this.ForeColor),5);
  }

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