UC知道请高手解答：如何在vb.net中的webbrowser控件中绘图
来源：百度知道 编辑：UC知道 时间：2024/06/22 15:10:59
比如在webbrowser中绘制一个点或一条线之类的
Private Sub DrawMap(ByVal CurrentPos As Integer)
Dim penBrush As Brush = New SolidBrush(Color.Black)
Dim blackThinPen As New Pen(Color.Red)
Dim curPoint As Point
curPoint = GetMapCoordinate(CurrentPos)
blackThinPen.Width = 6
Dim graphic As Graphics = WebBrowser1.CreateGraphics()
graphic.DrawLine(blackThinPen, curPoint.X, curPoint.Y, LastPoint.X, LastPoint.Y)
graphic.DrawEllipse(blackThinPen, curPoint.X, curPoint.Y, 6, 6)
graphic.DrawEllipse(blackThinPen, 50, 100, 9, 9)
End Sub
3条语句都没有效果，望热心人指点，不胜感激
Private Sub DrawMap(ByVal CurrentPos As Integer)
Dim penBrush As Brush = New SolidBrush(Color.Black)
Dim blackThinPen As New Pen(Color.Red)
Dim curPoint As Point
curPoint = GetMapCoordinate(CurrentPos)
blackThinPen.Width = 6
Dim graphic As Graphics = WebBrowser1.CreateGraphics()
graphic.DrawLine(blackThinPen, curPoint.X, curPoint.Y, LastPoint.X, LastPoint.Y)
graphic.DrawEllipse(blackThinPen, curPoint.X, curPoint.Y, 6, 6)
graphic.DrawEllipse(blackThinPen, 50, 100, 9, 9)
End Sub
3条语句都没有效果，望热心人指点，不胜感激
webbrowser是不断刷新的。就算你绘了图，那个位置马上又被刷新为原来的样子，所以此路不通。
可不可以这样变通：
把你的图片制作好，然后在htm文件中引用它，最后通过webbrowser显示。