VB.NET：清除图片框
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VB.NET: Clearing a picturebox
提问by tmighty
None of the code that I have seen so far to clear a picturebox achieved what I needed. I wanted to clear a picturebox so that I can draw something new over a "blank" background.
到目前为止，我所看到的清除图片框的代码都没有达到我所需要的。我想清除一个图片框，以便我可以在“空白”背景上画一些新的东西。
Here is my code:
这是我的代码：
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
PictureBoxClear(Me.PictureBox1)
m_i = m_i + 1
Dim nPT As New Point(0, 0)
Me.ImageList1.Draw(Me.PictureBox1.CreateGraphics, nPT, m_i)
End Sub
Public Sub PictureBoxClear(ByRef pb As PictureBox)
pb.Image = Nothing
End Sub
Saying
说
.Image = Nothing
seems to completely remove the image so that I can not really draw something over it afterwards. I just wanted to clear my picturebox so that it would then ready be get some drawing again.
似乎完全删除了图像，以便之后我无法真正在其上绘制某些内容。我只是想清除我的图片框，这样它就可以准备好再次画画了。
Thank you!
谢谢！
采纳答案by nneonneo
You can try replacing it with a brand new image:
您可以尝试用全新的图像替换它：
pb.Image = New Bitmap(pb.ClientSize.Width, pb.ClientSize.Height)
