Specified method is not supported. NotSupportedException crossed a native/managed boundary by JRisPicman

I get this, too. Here's how to reproduce: Take any System.Drawing.Image byte stream, and try to serve it up as an ContentType="image/jpeg" via an .aspx page.

e.g.
ShowImage.aspx has the following minimal markup:
****************************
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="ShowImage.aspx.vb" Inherits="ShowImage" ContentType="image/jpeg" %>

And here's the class for the code-behind:
*****************************
Partial Class ShowImage
    Inherits System.Web.UI.Page
    Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
        Dim img As System.Drawing.Bitmap = Nothing

        Using img
            img = CType(Session("IMG"), System.Drawing.Bitmap)

            Response.Clear()
            Response.ContentType = "image/jpeg"
            img.Save(Response.OutputStream, Drawing.Imaging.ImageFormat.Jpeg) 'throws the error here
        End Using
    End Sub
End Class

I'm getting this exact message too, in code that's virtually identical to AndreZero's. The only difference is that I'm using a different overload of System.Drawing.Image.Save...

Public Sub Save(ByVal stream As System.IO.Stream, ByVal encoder As System.Drawing.Imaging.ImageCodecInfo, ByVal encoderParams As System.Drawing.Imaging.EncoderParameters).

This is in an ASP.NET application, and I'm using VS2010 on Win7 x86. It happens with both FF4 and IE8 as browser, and doesn't occur running outside Visual Studio. I have not yet applied SP1 to VS2010.

Hi
I Have the same error. occurs in the save moment;

            System.Drawing.Bitmap img = new C2of5i(code, 1, 50, code.Length).ToBitmap();
            img.Save(context.Response.OutputStream, ImageFormat.Jpeg);
                                                                                                            

System.NotSupportedException crossed a native/managed boundary
Message=Specified method is not supported.
Source=System.Web
StackTrace:
     at System.Web.HttpResponseStream.get_Position()
     at System.Drawing.UnsafeNativeMethods.ComStreamFromDataStream.Seek(Int64 offset, Int32 origin)

Thanks in advance

Hi

I have uploaded the VB 2010 SP1 beta project and it is giveing the error, don't hesitate to as for something else.

Joop

Thanks for reporting this issue. In order to fix the issue, we must first reproduce the issue in our labs. We are unable to reproduce the issue with the steps you provided.

Please give us a demo project to demonstrate this issue so that we can conduct further research.

It would be greatly appreciated if you could provide us with that information as quickly as possible. If we do not hear back from you within 5 days, we will close this issue.

Thanks again for your efforts and we look forward to hearing from you.

Microsoft Visual Studio Connect Support Team

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