GDI+是一种绘图装置接口,
当拖动窗体是,窗体发生移动,window默认为从窗体移动到另一个地方,先发生擦除后再重新画一个窗体;
而我们自己动手画的图(如下面的线),不会重新画;在属性中,Paint,中,将画图的程序重新写一遍就可实现重画。
画一条线
private void button1_Click(object sender, EventArgs e)
{
// 创建GDI
Graphics g = this.CreateGraphics();
//创建两个点
Point n1=new Point (20,20);
Point n2=new Point (100,100);
//创建画笔
Pen p = new Pen(Brushes .Black );
g.DrawLine(p,n1,n2);
}
画矩形
private void button2_Click(object sender, EventArgs e)
{
Graphics gg = this.CreateGraphics();
// Rectangle r=new Rectangle ();
Pen p = new Pen(Brushes .Black );
gg.DrawRectangle(p,50,50,60,60);
}
画扇形
Graphics gpie = this.CreateGraphics ();
Pen pp = new Pen(Brushes .Bisque );
Rectangle re=new Rectangle (50,50,60,60);
gpie.DrawPie(pp,re,0,60);
画文本:
g.DrawString()
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作者:哈嘿哈嘿搬砖喽
来源:CSDN
原文:https://blog.csdn.net/yanhuatangtang/article/details/72807108