Question

c#截取panel显示的整个图片

C#将正在显示的整个panel图片截取下来。

Answer 1

之前遇到过一个人提过类似的问题，下面是当时做的例子：
（一个窗体，上面有一个按钮，点击按钮触发事件）
private void button1_Click(object sender, EventArgs e)
{
//this.Hide();
timer.Tick += new EventHandler(timer_Tick);
timer.Start();
}

void timer_Tick(object sender, EventArgs e)
{
//停止定时器；
timer.Stop();
//Bitmap bit = new Bitmap(System.Windows.Forms.Screen.PrimaryScreen.Bounds.Width, System.Windows.Forms.Screen.PrimaryScreen.Bounds.Height);
Bitmap bit = new Bitmap(this.Width, this.Height);
Graphics g = Graphics.FromImage(bit);

//g.CopyFromScreen(new Point(0, 0), new Point(0, 0), bit.Size);
g.CopyFromScreen(new Point(this.Location.X,this.Location.Y), new Point(0, 0), bit.Size);

SaveFileDialog saveFileDialog = new SaveFileDialog();
saveFileDialog.Filter = "bmp|*.bmp|jpg|*.jpg|gif|*.gif";
if (saveFileDialog.ShowDialog() != DialogResult.Cancel)
{
bit.Save(saveFileDialog.FileName);
}
g.Dispose();
this.Visible = true;
}

Answer 2

Bitmap bm = new Bitmap(panel.Width,panel.Height);
Rectangle r = new Rectangle(0,0,panel.Width,panel.Height);
panel.DrawToBitmap(bm,r);