C# 实现中国象棋【棋盘，棋子】

本文是利用C# 实现中国象棋的棋盘绘制，以及初始化布局，并不实现中国象棋的对弈逻辑。仅供学习参考使用。

思路：

1. 绘制中国象棋棋盘，竖线九条，横线十条。再中间绘制‘楚河’，‘汉界’ 。
2. 绘制棋子，然后将棋子布局在棋盘上即可。

涉及知识点：

1. 用户控件：用于实现棋盘的绘制，重写 OnPaint(PaintEventArgs e) 方法。
2. Matrix：封装表示几何变换的 3x3 仿射矩阵。本例中主要用于旋转绘制反方的‘汉界’。
3. GraphicsPath：表示一系列相互连接的直线和曲线。本例中主要用于绘制圆形棋子。

效果图如下：

（一）

（二）

核心代码

棋盘核心代码如下：

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

             //初始化数组
             InitArrPieceInfo();

             Graphics g = e.Graphics;
             int width = this.Width;
             int height = this.Height;
             int padding = this.Padding.All * ;
             int center = height / ;//垂直中心位置
             int s_width = (width -  * padding) / ;//每一条横线的间距
             int s_heigth = (height -  * padding) / ;//每一条竖线的间距
             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[] { "", "", "", "", "", "", "", "", "" });
             dicNums.Add("down", new string[] { "九", "八", "七", "六", "五", "四", "三", "二", "一" });
             Font font = new Font("宋体", , FontStyle.Regular);
             for (int i = ; i < ; i++)
             {
                 //竖线九条
                 Point p0 = new Point(start_x + i * s_width, start_y);
                 Point p1 = new Point(start_x + i * s_width, start_y + (s_heigth * ));
                 Point p2 = new Point(start_x + i * s_width, start_y + (s_heigth * ));
                 Point p3 = new Point(start_x + i * s_width, start_y + (s_heigth * ));
                 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 - , padding / );
                 Point p_down = new Point(start_x + i * s_width - , start_y + (s_heigth * ) + padding / );
                 g.DrawString(dicNums["up"][i], font, Brushes.Black, p_up);
                 g.DrawString(dicNums["down"][i], font, Brushes.Black, p_down);
                 //数组赋值
                 for (int j = ; j < ; j++)
                 {
                     Point absLocation = ArrPiece[i, j].AbsoluteLocation;
                     absLocation.X = start_x + i * s_width;
                     ArrPiece[i, j].AbsoluteLocation = absLocation;
                 }
             }
             for (int i = ; i < ; i++)
             {
                 //横线十条
                 Point p0 = new Point(start_x, start_y + i * s_heigth);
                 Point p1 = new Point(start_x + s_width * , start_y + i * s_heigth);
                 g.DrawLine(pen, p0, p1);
                 //数组赋值
                 for (int j = ; j < ; j++)
                 {
                     Point absLocation = ArrPiece[j, i].AbsoluteLocation;
                     absLocation.Y = start_y + i * s_heigth;
                     ArrPiece[j, i].AbsoluteLocation = absLocation;
                 }
             }
             //绘制九宫格
             for (int i = ; i < ; i++)
             {
                 Point p0 = new Point(start_x + ( + i * ) * s_width, start_y);
                 Point p1 = new Point(start_x + ( - i * ) * s_width, start_y + (s_heigth * ));
                 Point p2 = new Point(start_x + ( + i * ) * s_width, start_y + (s_heigth * ));
                 Point p3 = new Point(start_x + ( - i * ) * s_width, start_y + (s_heigth * ));
                 g.DrawLine(pen, p0, p1);
                 g.DrawLine(pen, p2, p3);
             }

             //兵和卒处有拐角，从左往右
             for (int i = ; i < ; i++)
             {
                 int p_x = start_x +  * i * s_width;
                 int p_y = start_y +  * s_heigth;
                 DrawCorner(g, pen, p_x, p_y);//兵
                 p_y = start_y +  * s_heigth;
                 DrawCorner(g, pen, p_x, p_y);//卒
             }
             //炮处的拐角，从左往右
             for (int i = ; i < ; i++)
             {
                 int p_x = start_x + ( +  * i) * s_width;
                 int p_y = start_y +  * s_heigth;
                 DrawCorner(g, pen, p_x, p_y);//炮
                 p_y = start_y +  * s_heigth;
                 DrawCorner(g, pen, p_x, p_y);//炮
             }
             //绘制楚河汉界
             Point p_0 = new Point( * s_width, center - );
             Point p_1 = new Point( * s_width, center + );
             font = new Font("方正隶二繁体", , FontStyle.Regular);
             g.DrawString("楚河", font, Brushes.Black, p_0);
             Matrix mtxSave = g.Transform;
             Matrix mtxRotate = g.Transform;
             mtxRotate.RotateAt(, p_1);
             g.Transform = mtxRotate;
             g.DrawString("汉界", font, Brushes.Black, p_1);
             g.Transform = mtxSave;
             //绘制外边框
             g.DrawRectangle(pen, , , width - , height - );
             g.DrawRectangle(pen, , , width - , height - );
             g.DrawRectangle(pen, , , width - , height - );
         }

棋子核心代码如下：

         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(, , this.Width - , this.Height - );
             g.FillEllipse(new SolidBrush(this.BackColor), rectangle);
             g.DrawEllipse(new Pen(Color.Black,), inRect);

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

源码下载链接