Is there anyway to just make it ignore that member and and not serialize it, but serialize everything normally?
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WebService Serialization problem
I have a class for simplicity sake lets say that it has 2 Public properties with corresponding private fields. The first property is ImageUrl as String. The second property is Image as Bitmap. I have make the Image property with the NonSerialized() and Xml.Serialization.SoapIgno
The problem is that I still get the error that a Bitmap cannot be serialized when I try and view the webservice. So how can I serialize this class from the web server to the client (WinForms just so you know).
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Answers
I have the following
' Contains the bitmap image for this drill option.
<Xml.Serialization.SoapIgn
Public Property Image() As System.Drawing.Bitmap
Get
If _Image Is Nothing Then
Dim http As New System.Net.WebClient
Dim information() As Byte
information = http.DownloadData(_ImageUr
Dim stream As New System.IO.MemoryStream(inf
_Image = New System.Drawing.Bitmap(stre
End If
Return _Image
End Get
Set(ByVal Value As System.Drawing.Bitmap)
_Image = Value
End Set
End Property
Public Property ImageUrl() As String
Get
Return _ImageUrl
End Get
Set(ByVal Value As String)
_ImageUrl = Value
End Set
End Property
<NonSerialized(), Xml.Serialization.SoapIgno
Private _ImageUrl As String
OK I can do this and I get by this error.
Now I have another error. I'll increase the points if you can answer this one as well.
Another one of the fields in the class is of System.Type and now I get the following error message
The property 'MemberType' on type 'System.Reflection.MemberI
Any ideas on what I can do with this one. This time I do need the type, so I can't do the ImageUrl as string type of thing.
Never heard of that one, but I found a thread on it (although it doesn't sound like exactly the same problem)
http://www.dotnet247.com/2
Are you using an explicit permission attribute? If so, can you remove it.? If not, is the code in the property body doing something that requires special permissions?
Hmmm... from the Dotnet247 thread it would appear that Reflection is not allowed on items that have declarative security. The XML serializer uses Reflection, so that's probably why you're getting the error.
Grasping at straws: Can you do a .ToString() on the System.Type, expose the property as a string, and then reconstitute it as a type on the other end?
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by: wile_e_coyotePosted on 2004-02-05 at 08:52:12ID: 10281990
A couple of ideas
1. you can do your own serialization by implementing the IXmlSerializable interface. You can serialize the bitmap by converting it to a byte-array and writing it as a Base64 string.
2. you could use WSE (web service enhancements) to transfer the image as a file attachment. This would mean that the image probably could not be a member of your class.