直接绘制到PictureBox
本文关键字:PictureBox 绘制 | 更新日期: 2023-09-27 18:10:22
我正在开发一个屏幕共享应用程序,它不断运行循环并从套接字接收小帧。下一步是将它们绘制到PictureBox中。当然,我使用thread是因为我不想冻结ui。
这是我的代码:
Bitmap frame = byteArrayToImage(buff) as Bitmap;//a praticular bitmap im getting from a socket.
Bitmap current = (Bitmap)pictureBox1.Image;
var graphics = Graphics.FromImage(current);
graphics.DrawImage(frame, left, top);//left and top are two int variables of course.
pictureBox1.Image = current;
但是现在我得到一个错误:
对象已经在其他地方被使用。
var graphics = Graphics.FromImage(current);
trying to Clone
it, Create a New Bitmap(current)
。
无效()你的PictureBox,使它重新绘制自己:
Bitmap frame = byteArrayToImage(buff) as Bitmap;
using (var graphics = Graphics.FromImage(pictureBox1.Image))
{
graphics.DrawImage(frame, left, top);
}
pictureBox1.Invalidate();
如果你需要它是线程安全的,那么:
pictureBox1.Invoke((MethodInvoker)delegate {
Bitmap frame = byteArrayToImage(buff) as Bitmap;
using (var graphics = Graphics.FromImage(pictureBox1.Image))
{
graphics.DrawImage(frame, left, top);
}
pictureBox1.Invalidate();
});