CODEWITHSUNDEEP
vb.net
Mickey
Mickey

Reputation: 1

Populate picture box from eID vb.net

Hi i got form that reads eID card, smart cards text data reads correctly picturebox name is picLK but last statement is a picture

in VB6 and VBA I used

me.pctLK.Picture = ReaderEngine.portrait

ReaderEngine is procedure that reads data from card

when I use command in vb.net I get an error

me.pctLK = ReaderEngine.portrait

reader is reading card, but I got this message

An unhandled exception of type 'System.InvalidCastException' occurred in Project1.exe

Additional information: Unable to cast COM object of type 'stdole.StdPictureClass' to class type 'System.Windows.Forms.PictureBox'. Instances of types that represent COM components cannot be cast to types that do not represent COM components; however they can be cast to interfaces as long as the underlying COM component supports QueryInterface calls for the IID of the interface.

I am new to VB .net

Is there any suggestions?

Upvotes: 0

Views: 165

Answers (1)

Dai
Dai

Reputation: 155726

VB.NET has a helper function in the Microsoft.VisualBasic.Compatibility.VB6.Support module, named IPictureDispToImage, which accepts an StdPictureClass object (which implements IPictureDisp) and returns a .NET System.Drawing.Image object which you can assign to the PictureBox.Image property. Be sure you appropriately dispose of the Image when you're finished with it:

Dim comImage As StdOle.StdPictureClass = ReaderEngine.portrait
If Me.picLK.Image Is Not Nothing Then
    Me.picLK.Image.Dispose()
    Me.picLK.Image = Nothing
End If

Dim newImage As System.Drawing.Image = Support.IPictureDispToImage( comImage )
Me.picLK.Image = newImage

Upvotes: 0

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