展开全部
画点:
在PictureBox的Paint事件里面:
dim myGraphics=e.Graphics
Dim myPointArray As Point() = {New Point(0, 0), New Point(50, 30), New Point(30, 60)}
myGraphics.DrawPolygon(myPen, myPointArray)
画圆:
Dim g As Graphics
g = PictureBox1.CreateGraphics
g.FillEllipse(Brushes.Red, x, y, 10, 10)
在PictureBox的Paint事件里面:
dim myGraphics=e.Graphics
Dim myPointArray As Point() = {New Point(0, 0), New Point(50, 30), New Point(30, 60)}
myGraphics.DrawPolygon(myPen, myPointArray)
画圆:
Dim g As Graphics
g = PictureBox1.CreateGraphics
g.FillEllipse(Brushes.Red, x, y, 10, 10)
追问
DrawPolygon是画多边形的啊,我说的是画点啊
追答
不好意思,看错了,画点可以用bitmap类的SetPixel方法实现:
Private Sub PictureBox1_Click(sender As System.Object, e As System.EventArgs) Handles PictureBox1.Click
Dim bmp As New Bitmap(200, 100, Imaging.PixelFormat.Format32bppArgb)
bmp.SetPixel(10, 10, Color.Red) '在PictureBox1控件的(10,10)坐标,画一个红点
PictureBox1.Image = bmp
End Sub
引用xjnzhidao的回答:
画点:
在PictureBox的Paint事件里面:
dim myGraphics=e.Graphics
Dim myPointArray As Point() = {New Point(0, 0), New Point(50, 30), New Point(30, 60)}
myGraphics.DrawPolygon(myPen, myPointArray)
画圆:
Dim g As Graphics
g = PictureBox1.CreateGraphics
g.FillEllipse(Brushes.Red, x, y, 10, 10)
画点:
在PictureBox的Paint事件里面:
dim myGraphics=e.Graphics
Dim myPointArray As Point() = {New Point(0, 0), New Point(50, 30), New Point(30, 60)}
myGraphics.DrawPolygon(myPen, myPointArray)
画圆:
Dim g As Graphics
g = PictureBox1.CreateGraphics
g.FillEllipse(Brushes.Red, x, y, 10, 10)
展开全部
其实画点就是画矩形啊,只要把边长设为一个像素就行
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