Cor,
Thanks for the reply, I don't think that's quite what I'm after and I
can't see how to adapt it. Here's some example code to try to show what it
is I want to do (I'm using C# but I can understand your VB):
// First get my original image.
System.Drawing.Image.GetThumbnailImageAbort myCallback = new
System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback);
System.Drawing.Image img = System.Drawing.Image.FromFile(@"c:\img.jpg");
// Then make the thumbnail
img = img.GetThumbnailImage(100, 100, myCallback, IntPtr.Zero);
// Then somehow make the FileStream and get a reference to the FileHandle.
FileStream MyFileStream = ... // don't know what to do here?
IntPtr FileHandle = MyFileStream.Handle;
// Finally write this.
Response.WriteFile(FileHandle, 0, MyFileStream.Length);
Does that make sense?
Thanks for your help so far, and apologies if I have missed something in
your reply.
Toby
"Cor" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Hi Toby,
>
> I made a sample that works. In a nice way.
> It is not a thumbnail, but that you can make using the memorystream.
> It is imposible to put an image from a stream direct on a webpage.
> A webpage can only show an IMG.
> If you want to use a thumbnail, you first needs to convert that there is a
> special class for that.
>
> I hope this is something you need.
>
>
> \\\For the database the image database sample from the Resource kit is
used.
> \\\It needs 2 forms with on form1 a listbox, a picturebox and a label and
> on form2 nothing
> Private Sub Page_Load(ByVal sender As System.Object, _
> ByVal e As System.EventArgs) Handles MyBase.Load
> If Not IsPostBack Then
> Dim conn As New SqlClient.SqlConnection _
> ("Server=localhost;" & "DataBase=Northwind;" & _
> "Integrated Security=SSPI")
> Dim cmd As New SqlClient.SqlCommand("SELECT FileName,
PictureID
> FROM Picture", conn)
> Dim da As New SqlClient.SqlDataAdapter(cmd)
> Dim dsPictures As New DataSet
> da.Fill(dsPictures)
> Me.Image1.Visible = False
> ListBox1.AutoPostBack = True
> Try
> ListBox1.DataSource = dsPictures.Tables(0)
> ListBox1.DataTextField = "FileName"
> ListBox1.DataValueField = "PictureID"
> ListBox1.DataBind()
> Catch sqlExc As SqlClient.SqlException
> Me.Label1.Text = "Database Error"
> Catch exc As Exception
> Me.Label1.Text = "Datbase Connection Failed!"
> End Try
> conn.Close()
> End If
> End Sub
> Private Sub ListBox1_SelectedIndexChanged(ByVal sender _
> As System.Object, ByVal e As System.EventArgs) Handles
> ListBox1.SelectedIndexChanged
> Session.Item("img") = ListBox1.SelectedItem.Value
> Image1.Visible = True
> Image1.ImageUrl = "http://localhost/WebApplication1/WebForm2.aspx"
> End Sub
> ///
> \\\
> Private Sub Page_Load(ByVal sender As System.Object, _
> ByVal e As System.EventArgs) Handles MyBase.Load
> Dim conn As New SqlClient.SqlConnection("Server=localhost;" & _
> "DataBase=Northwind;" & "Integrated Security=SSPI")
> Dim sqlstr As String = _
> String.Format("SELECT Picture FROM Picture WHERE (PictureID =
{0})",
> CInt(Session.Item("img")))
> Dim cmd As New SqlClient.SqlCommand(sqlstr, conn)
> conn.Open()
> Dim rdr As SqlClient.SqlDataReader = cmd.ExecuteReader()
> rdr.Read()
> Response.BinaryWrite(CType(rdr.Item("Picture"), Byte()))
> rdr.Close()
> conn.Close()
> End Sub
> ///
> I hope this helps a little bit?
>
> Cor
>
>
>
>
>
>
>
>
> > >
> > > In an ASP.Net application I want to convert open create a FileStream
> > > object from a System.Drawing.Image - is this possible? I create an
> > instance
> > > of an Image object using the FromFile method, then use the
> > GetThumbnailImage
> > > method to create a second Image. This second one is the one I want to
> get
> > a
> > > FileStream from, so that I can then use its Handle to use
> > Response.WriteFile
> > > to output the thumbnail on my ASP.Net page.
> > >
> > > Any help would be much appreciated - I realise I may not even be
going
> > > about this in the most appropriate way! Thanks in advance,
> > >
> > > Toby Mathews
> > >
> > >
> >
> >
>
>
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