Question

c#如何获取鼠标在picturebox上的点的颜色？

Private Sub Picture7_MouseMove(Button As Integer, Shift As Integer, x As Single, y As Single)
If Picture7.Point(x, y) = ComPara.Command7.BackColor Then
Shape7.Move x - Val(X4.Text) / 500, y + Val(Y4.Text) / 20
Shape7.Visible = True
Shape7.BorderColor = ComPara.Command7.BackColor
Picture7.ToolTipText = "X:" & Format$(x, "0.0") & "," & "Y:" & Format$(y, "0.0")
Exit Sub
Else
Shape7.Visible = False
End If
End Sub
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这个是vb中的代码，当鼠标在picturebox上移动时，如果遇到了某种特定的颜色，就用一个圈圈标出来
这个在c#中如何实现？

Answer 1

使用DrawToBitmap把PictureBox转换为一个Bitmap，然后在通过GetPixel方法得到某一个点的颜色
Bitmap picBackGround = new Bitmap(this.pictureBox.Width, this.pictureBox.Height);
this.pictureBox.DrawToBitmap(picBackGround, new Rectangle(0, 0, this.pictureBox.Width, this.pictureBox.Height));
某一点的坐标x,y的颜色
Color currentColor = picBackGround.GetPixel(x,y);