C#控件picturebox实现画图功能

2020-01-24 00:14:51

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本文实例为大家分享了C# picturebox实现画图功能的具体代码，供大家参考，具体内容如下

在Form上添加一个pictureBox,一个button控件

如图所示：

这样我们的绘画面板就弄好了，把pictureBox的dock属性设置为fill，按键为清屏的作用。

private Point p1, p2;//定义两个点（启点，终点）private static bool drawing=false;//设置一个启动标志private void pictureBox1_MouseDown(object sender, MouseEventArgs e)    {               p1 = new Point(e.X, e.Y);       p2 = new Point(e.X, e.Y);        drawing = true;          } private void pictureBox1_MouseUp(object sender, MouseEventArgs e)    {      drawing = false;    }private void pictureBox1_MouseMove(object sender, MouseEventArgs e)     {           Graphics g = pictureBox1.CreateGraphics();      if(e.Button ==MouseButtons.Left)      {        if (drawing)        {          //drawing = true;          Point currentPoint = new Point(e.X, e.Y);          g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;//消除锯齿          g.DrawLine(new Pen(Color.Blue, 2), p2,currentPoint);                    p2.X = currentPoint.X;          p2.Y = currentPoint.Y;        }       }          }//清屏操作private void button1_Click(object sender, EventArgs e){ Graphics g = pictureBox1.CreateGraphics(); g.Clear(Color.White);}