我有一个程序,它拍摄所选区域的屏幕截图(我用鼠标选择)并将其保存到剪贴板。问题是它只有在我从上到下进行选择时才有效。如果我尝试在任何其他方向(从下到上,从右到左,从左到右)进行选择,程序将崩溃。这是MouseMove的代码:
public void Window_MouseMove(object sender, System.Windows.Input.MouseEventArgs e)
{
if (this.isMouseDown)
{
double curx = e.GetPosition(null).X;
double cury = e.GetPosition(null).Y;
System.Windows.Shapes.Rectangle r = new System.Windows.Shapes.Rectangle();
SolidColorBrush brush = new SolidColorBrush(Colors.White);
r.Stroke = brush;
r.Fill = brush;
r.StrokeThickness = 1;
r.Width = Math.Abs(curx - x);
r.Height = Math.Abs(cury - y);
selekt.Children.Clear();
selekt.Children.Add(r);
Canvas.SetLeft(r, x);
Canvas.SetTop(r, y);
if (e.LeftButton == MouseButtonState.Released)
{
selekt.Children.Clear();
width = e.GetPosition(null).X - x;
height = e.GetPosition(null).Y - y;
this.CaptureScreen(x, y, width, height);
this.x = this.y = 0;
this.isMouseDown = false;
this.Close();
}
}
}
这适用于CaptureScreen:
public void CaptureScreen(double x, double y, double width, double height)
{
int ix, iy, iw, ih;
ix = Convert.ToInt32(x);
iy = Convert.ToInt32(y);
iw = Convert.ToInt32(width);
ih = Convert.ToInt32(height);
Bitmap slika = new Bitmap(iw, ih, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
Graphics g = Graphics.FromImage(slika);
g.CopyFromScreen(ix, iy, 0, 0,new System.Drawing.Size(iw, ih),CopyPixelOperation.SourceCopy);
System.Windows.Forms.Clipboard.SetImage(slika);
答案 0 :(得分:0)
你得到的错误是下面提到的代码吗?这似乎是你得到一个的地方。
Canvas.SetLeft(r, x);
Canvas.SetTop(r, y);
如果是,那就是因为SetLeft采用UIElement和双值
public static void SetLeft(
UIElement element,
double length)
而且,我猜测x和y是双重的并且被宣布为公开。