When I execute the following code, I get the error - An unhandled exception of type 'System.ComponentModel.Win32Exception' occurred in System.Drawing.dll. In this example it occurs because the wmf file is very large and PictureBox1 size mode is Auto.
I know I can prevent this error, but that's not the point. The point is I can't trap it. The error never gets caught.
Can anyone please enlighten me as to why this is possible and what if anything can be done about it I thought exception error handling was supposed to prevent this type of thing from happening
On a separate note, it would be nice to know (or be able to calculate) the size limitation of the PictureBox control. My guess is it's hardware dependent and therefore not documented. Any help is appreciated.
Thank you.
Try
PictureBox1.Image = Image.FromFile("ImageTest.wmf")
Catch ex As SystemException
MsgBox("Trapped Error Win32Exception " + ex.Message)
Catch ex As ApplicationException
MsgBox("Trapped Error ApplicationException " + ex.Message)
Catch ex As Exception
MsgBox("Trapped Error Exception " + ex.Message)
End Try
How do you trap errors from System.Drawing.dll?
IamHuM
Thank you for the responses. Ken, assigning the value to the image first did not appear to help. nobugz, it was a good idea to try the paint event but that didn't work either. McWhirter, thanks for the tip.
I also tried trapping the error with "On Error Goto" but that didn't seem to work either.
I think there two issues here. That the System.Drawing.dll does not always properly throw or raise errors, and when this happens (in this example or others) that there is apparently nothing that can be done about it.
This may be a unique case since it most likely is caused by a memory overrun, but you would hope a MS provided dll would behave better.
Hopefully someone from Microsoft is monitoring this forum and can enlighten us on this.
ccondit
Private Sub PictureBox1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles PictureBox1.Paint
Try
MyBase.OnPaint(e)
Catch ex As Exception
MsgBox(ex.ToString)
PictureBox1.Image = PictureBox1.ErrorImage
End Try
End Sub
stake75
Kapalic
Try
Dim img as image
img=Image.FromFile("ImageText.wmf")
picturebox1.image=img
etc....................