vb.net 图片框，带有透明背景的 .png 加载在其中？
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vb.net Picture box with a .png with a transparent background loaded in it?
提问by Andy
Ive got a .png file called donkey1.png - it has a transparent background and I have loaded it into a picturebox called pcbDonkey1 - I have changed the properties of the picturebox to have the backcolor transparent - This does not work as it still crosses over another image and has a white background.
我有一个名为 donkey1.png 的 .png 文件 - 它有一个透明的背景，我已经将它加载到一个名为 pcbDonkey1 的图片框 - 我已经更改了图片框的属性以使背景颜色透明 - 这不起作用，因为它仍然交叉另一个图像并具有白色背景。
I've heard about using GDI to draw this image so it will have a transparent image and be able to cross the over image without the white background.
我听说过使用 GDI 来绘制这个图像，所以它会有一个透明的图像，并且能够在没有白色背景的情况下穿过图像。
How would you do this?
你会怎么做？
Thanks
谢谢
回答by user2488689
Just set the background picture to be the parent of the foreground picturebox and the transparancy will work without need for any additional coding
只需将背景图片设置为前景图片框的父级，透明度就可以工作而无需任何额外的编码
With PictureBox1
.Image = My.Resources._00_lichaam
.SizeMode = PictureBoxSizeMode.Zoom
End With
With PictureBox2
.Parent = PictureBox1
.Image = My.Resources._01_Hoofd
.SizeMode = PictureBoxSizeMode.Zoom
.BackColor = Color.Transparent
End With
That should work
那应该工作
回答by user2488689
Unless you need the PixtureBox control for something more than displaying an image, you can draw the image directly to the form in the Paint event:
除非你需要 PixtureBox 控件来显示图像以外的其他东西，否则你可以在 Paint 事件中直接将图像绘制到窗体上：
Example (you will need to calculate aspect ratio etc., but in principle):
示例（您需要计算纵横比等，但原则上）：
Sub Form_Paint(s as Object, e as PaintEventArgs) Handles Me.OnPaint
Dim r As New Rectangle(myX, myY, myWidth, myHeight)
e.graphics.DrawImage(myImage, r)
End Sub
