C#知识点-GDI绘图

一、开发环境

二、开发过程

1.画一条直线

private void btnDrawLine_Click(object sender, EventArgs e)
{
//创建一个画图图面
Graphics g = this.CreateGraphics();
//创建一只笔
Pen pen = new Pen(Brushes.Red);
//直线的两个坐标
Point pointStart = new Point(10, 10);
Point pointEnd = new Point(50, 50);
//开始画
g.DrawLine(pen, pointStart, pointEnd);
}

2.画一个矩形

private void btnDrawRectangle_Click(object sender, EventArgs e)
{
//创建一个画图图面
Graphics g = this.CreateGraphics();
//创建一只笔
Pen pen = new Pen(Brushes.DeepSkyBlue);
//确定矩形的起点、长和高
g.DrawRectangle(pen, 50, 50, 60, 30);
}

3.画一个字符串

private void btnDrawString_Click(object sender, EventArgs e)
{
Graphics g = this.CreateGraphics();
Font font = new Font("华为宋体", 12);
//Point一样，只是值是浮点类型
PointF point = new PointF(50, 50);
g.DrawString("我是Kimisme", font, Brushes.Coral, point);
}

4.画一个扇形

private void btnDrawSector_Click(object sender, EventArgs e)
{
Graphics g = this.CreateGraphics();
g.DrawPie(new Pen(Brushes.Green),
new Rectangle(new Point(100, 70),
new Size(50, 50)), 60, 90);
}