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);
}
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