I'm using VB.net (.Net 2.0). How to draw a png image file on the form by clicking a button? I would like to set the cordinates (x, y) but the image size should be the original of the file. I would like to view the png files as transparent (as they originally are).

When clicking the button set a global boolean to true (i.e LoadImage), then call Me.Refresh().
On your form event called Paint do the following

Private Sub frmMaint_Paint(ByVal sender As System.Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
if (LoadImage = True) then
e.Graphics.DrawImage("C:\myimage.png", New Point(100, 200))
end if
End Sub


Untested, should work.

Regards,

Luc Pettett

I didn't really optimise that code.. you probably should load the image into memory prior to the refresh event.

Luc Pettett

Thanks! I have loaded the images as resources. How to make reference to them? I think it's not very handy to refer every time to particular path on hard disk.

Hello,

If you have added the file as an embedded resource project can do the following:

Dim myImage as new Bitmap(Assembly.GetExecutingAssembly().
GetManifestResourceStream("PictureBoxControl.myimage.png"))

and keep this 'myImage' vairable as public so you don't need to reload it.

To make it simple I would just add a picture box to your form and when you want to see the png image just set the picture box Visible to True.

Enjoy,

Luc Pettett