我正在 Windows Mobile 智能设备应用程序的图片框上绘制图表。该图运行良好,但之后立即消失。
我用了这条线:
this.Invoke(new EventHandler(picture2_show));
和我的绘画方法:
private void picture2_show(object sender, EventArgs e)
{
using (Graphics objGraphics = this.pictureBox2.CreateGraphics())
{
Pen redpen = new Pen(Color.Red, 1);
int picBoxWidth = pictureBox2.Size.Width;
int picBoxHeight = pictureBox2.Size.Height;
int halfWidth = pictureBox2.Size.Width / 2;
int halfHeight = pictureBox2.Size.Height / 2;
Graphics objGraphic = this.pictureBox2.CreateGraphics();
objGraphic.DrawLine(redpen, 0, 0, 0, picBoxHeight);
objGraphic.DrawLine(redpen, 0, picBoxHeight - 1, picBoxWidth, picBoxHeight - 1);
//Rectangle first = new Rectangle(0, halfHeight, picBoxWidth, halfHeight);
Pen bpen = new Pen(Color.LawnGreen, 3);
for (int i = 0; i < array.Length - 1; i++)
{
objGraphic.DrawLine(
bpen,
pictureBox2.Size.Width * i / array.Length,
pictureBox2.Size.Height - array[i],
pictureBox2.Size.Width * (i + 1) / array.Length,
pictureBox2.Size.Height - array[i + 1]);
}
}
}
图片框仍然存在,但是如何使图形不消失?
非常感谢您的帮助!