C#控件picturebox实现画图功能

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);
}

来源：https://blog.csdn.net/zjq2010014137/article/details/18270143