Response.

[Jenny]

My application generates images dynamic. These images are
then used for an image button like in the beneath.

Dim ob As Bitmap = New Bitmap(130, 30)
Dim banner As Graphics = Graphics.FromImage(ob)

Dim tempfilepath As String = System.IO.Path.GetTempPath
ob.Save(tempfilepath & "temp.jpg",
Imaging.ImageFormat.Jpeg)

image_button.ImageUrl = tempfilepath & CType(i, String) &
"temp.jpg"

Is it also possible to add this graphic with the help of
Response.BinaryWrite etc.? If yes how must the code luck like?

Thanks for all help

Jenny

[James J. Foster]

I'm thinking that you want to stream the image down as opposed to saving it
to disk. What you can do is create a separate page that just streams down
the bytes for an image. Create a new .aspx page and remove all the HTML
content. Add this code to the page_load event:

Bitmap ob = new Bitmap(130, 30);
Graphics banner = Graphics.FromImage(ob);
ob.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);

Next, in the page with your ImageButton control, set the source of the
ImageButton to the page you created above. For example, if your page was
called webform2.aspx, you'd have:

ImageButton1.ImageUrl = "webform2.aspx";

You can customize with parameters or whatever you need in order to generate
an appropriate image for that particular user.

--
James J. Foster, DotNetCoders
http://www.dotnetcoders.com
"Jenny" <j.********@SPAMx-mail.net> wrote in message
news:0a****************************@phx.gbl...

My application generates images dynamic. These images are
then used for an image button like in the beneath.

Dim ob As Bitmap = New Bitmap(130, 30)
Dim banner As Graphics = Graphics.FromImage(ob)

Dim tempfilepath As String = System.IO.Path.GetTempPath
ob.Save(tempfilepath & "temp.jpg",
Imaging.ImageFormat.Jpeg)

image_button.ImageUrl = tempfilepath & CType(i, String) &
"temp.jpg"

Is it also possible to add this graphic with the help of
Response.BinaryWrite etc.? If yes how must the code luck like?

Thanks for all help

Jenny

[Jenny]

Hi Karl,

thanks for the suggestion. But there is an image before the
sentence 'and place that in your' which I can't see. Can
you send it a second time?

Thanks
Jenny

-----Original Message-----
Haven't dealt with GDI+ in a bit..but instead of saving the file to thefilesystem which you are doing via:
ob.Save(tempfilepath & "temp.jpg", Imaging.ImageFormat.Jpeg)

why not save it to the response's outputstream ala:

ob.save(Response.OutputStream, Imaging.ImageFormat.Jpeg)

if you look at the save method, you'll see that you can save both to a fileand to a stream...which is exactly why there's a a Response.OutputStream :)
However, you'll have to change your logic a bit. If you save the bitmap tothe outputstream, you won't be able to render any text or anything...that'sbecause you can't have a mix of binary and text contenxt outputted to thescreen (just the way HTTP works...not an asp.net limitation). SO what you'dneed to do is something like this:

<img src="mytempimage.aspx" width="130" height="30"> and place that in youraspx page. This'll work because each image is fetched by the browser inits own stream/request. Then in mytmepimage.aspx you can simply save theimage to the response.outputstream...you'll also want to set yourresponse.contenttype accordingly..something like "umage/jpeg"

Karl

"Jenny" <j.********@SPAMx-mail.net> wrote in message
news:0a****************************@phx.gbl...

My application generates images dynamic. These images are
then used for an image button like in the beneath.

Dim ob As Bitmap = New Bitmap(130, 30)
Dim banner As Graphics = Graphics.FromImage(ob)

Dim tempfilepath As String = System.IO.Path.GetTempPath
ob.Save(tempfilepath & "temp.jpg",
Imaging.ImageFormat.Jpeg)

image_button.ImageUrl = tempfilepath & CType(i, String) &
"temp.jpg"

Is it also possible to add this graphic with the help of
Response.BinaryWrite etc.? If yes how must the code luck like?
Thanks for all help

Jenny

.