c# 如何实现 类似PS里的画图板背景功能？

Question

就像下图一样：写代码实现，而不是加个背景图片。谢谢？

Answer 1

就用Graphics，一个for循环就搞定.

Answer 2

绘制？
这是一个在PictureBox控件上绘制的代码
            pictureBox1.Image = new Bitmap(400, 400);
            Graphics gr = Graphics.FromImage(pictureBox1.Image);
            bool IsWhite = true;
            for(int h=0;h<400;h+=10)
                for (int w = 0; w < 400; w += 10)
                {
                    if (IsWhite)
                    {
                        gr.FillRectangle(Brushes.White, new Rectangle(new Point(w, h), new Size(10, 10)));
                        IsWhite = false;
                    }
                    else
                    {
                        gr.FillRectangle(Brushes.Gray, new Rectangle(new Point(w, h), new Size(10, 10)));
                        IsWhite = true;
                    }
                }
            gr.Dispose();

Answer 3

 private void Form1_Load(object sender, EventArgs e)
        {
            pictureBox1.Image = new Bitmap(400,400);
            Graphics gr = Graphics.FromImage(pictureBox1.Image);
            bool IsWhite = true;
            for (int h = 0; h < 400; h += 10)
            {
                if ((h / 10) % 2 == 0)
                {
                    IsWhite = false;
                }
                else
                {
                    IsWhite = true;
            }
                for (int w = 0; w < 400; w += 10)
                {
                    if (IsWhite)
                    {
                        gr.FillRectangle(Brushes.White, new Rectangle(new Point(w, h), new Size(10, 10)));
                        IsWhite = false;                    }
                    else
                    {
                        gr.FillRectangle(Brushes.Gray, new Rectangle(new Point(w, h), new Size(10, 10)));
                        IsWhite = true;                    }
            
               
                }
               
            }

Answer 4

就用Graphics，一个for循环就搞定.