C#一个画图简单功能问题

Question

我在picturebox1建立坐标轴，并画了一幅4个同心圆图，现在我想用button实现对图形的刷新、平移、变大、变小功能，但是不知道怎么入手，望各位高手给予帮助，在此谢过各位啦！

Answer 1

去看看 WPF 或者GDI+绘图部分的文章吧，给你一个链接http://blog.csdn.net/johnsuna/archive/2008/04/20/2309520.aspx 

Answer 2

public partial class Form1 : Form
    {
        Graphics g;
        public Form1()
        {
            InitializeComponent();
            g = panel1.CreateGraphics();
        }        /// <summary>
        /// 移动
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button2_Click(object sender, EventArgs e)
        {            
            g.TranslateTransform(50, 0);
            panel1.Invalidate();
         }        /// <summary>
        /// 刷新画圆
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void panel1_Paint(object sender, PaintEventArgs e)
        {
            g.DrawEllipse(new Pen(Brushes.Blue), new Rectangle(new Point(10, 10), new Size(40, 40)));            g.DrawEllipse(new Pen(Brushes.Blue), new Rectangle(new Point(10, 110), new Size(40, 40)));            g.DrawEllipse(new Pen(Brushes.Blue), new Rectangle(new Point(160, 10), new Size(40, 40)));            g.DrawEllipse(new Pen(Brushes.Blue), new Rectangle(new Point(160, 110), new Size(40, 40)));       
        }        /// <summary>
        /// 变大
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button3_Click(object sender, EventArgs e)
        {
            g.ScaleTransform(2, 2);
            panel1.Invalidate();
        }        /// <summary>
        /// 变小
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button4_Click(object sender, EventArgs e)
        {
            g.ScaleTransform((float)0.5, (float)0.5);
            panel1.Invalidate();
        }
    }

Answer 3

[code=C#]
public partial class Form1 : Form
    {
        Graphics g;
        public Form1()
        {
            InitializeComponent();
            g = panel1.CreateGraphics();
        }        /// <summary>
        /// 移动
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button2_Click(object sender, EventArgs e)
        {            
            g.TranslateTransform(50, 0);
            panel1.Invalidate();
         }        /// <summary>
        /// 刷新画圆
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void panel1_Paint(object sender, PaintEventArgs e)
        {
            g.DrawEllipse(new Pen(Brushes.Blue), new Rectangle(new Point(10, 10), new Size(40, 40)));            g.DrawEllipse(new Pen(Brushes.Blue), new Rectangle(new Point(10, 110), new Size(40, 40)));            g.DrawEllipse(new Pen(Brushes.Blue), new Rectangle(new Point(160, 10), new Size(40, 40)));            g.DrawEllipse(new Pen(Brushes.Blue), new Rectangle(new Point(160, 110), new Size(40, 40)));       
        }        /// <summary>
        /// 变大
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button3_Click(object sender, EventArgs e)
        {
            g.ScaleTransform(2, 2);
            panel1.Invalidate();
        }        /// <summary>
        /// 变小
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button4_Click(object sender, EventArgs e)
        {
            g.ScaleTransform((float)0.5, (float)0.5);
            panel1.Invalidate();
        }
    }[/code]

Answer 4

Press the button and refresh the picture box. 

Answer 5

Press the button and refresh the picture box. 

Answer 6

http://download.csdn.net/source/961479 给你个例子，看看能不能帮到你！

Answer 7

http://zzk.cnblogs.com/s?w=c%23+%e7%94%bb%e5%9b%be

Answer 8

http://download.csdn.net/source/775720
可以下载这个看看

Answer 9

这个CSDN上有的  自己搜一下.

Answer 10

使用.net的GDI+画图会比较死板，交互性不够强，建议LZ采用winapi接口画图，会得到更好的效果，会更灵活，交互性会更强