I have placed a button on a page to open a pdf stored on another
site.

When the user clicks on the button I do a Redirect to the pdf URL
.... and this seems to work fine.

Question: is this the best way to do that ?

In case the PDF file,   http://My.server.com/MyPdf.pdf  is not on the
server
how can I detect this condition within the program and inform the
user, instead of letting
him to receive an error page ?

-P

You could use System.net.WebClient to send HTTP requests to this third party 
server (possibly using a HEAD request at a lower level if you want just to 
check for the presence of this file wihtout downloading it).

---
Patrice

"pamela fluente"  a crit dans le message de news: 
1187693326.239309.171010@g4g2000hsf.googlegroups.com...

>
> I have placed a button on a page to open a pdf stored on another
> site.
>
> When the user clicks on the button I do a Redirect to the pdf URL
> ... and this seems to work fine.
>
> Question: is this the best way to do that ?
>
> In case the PDF file,   http://My.server.com/MyPdf.pdf  is not on the
> server
> how can I detect this condition within the program and inform the
> user, instead of letting
> him to receive an error page ?
>
> -P
> 

Create an internediate ASPX page that is returned. The intermediate page 
would use an HttpRequest to attempt to download the PDF file. If it gets 
back a 404 status code, it returns a regular HTML response indicating that 
the file is not found, or whatever you wish to say. Otherwise, it sets the 
Response.ContentType to "application/pdf" and uses Response.BinaryWrite to 
write the PDF file back to the client browser.

-- 
HTH,

Kevin Spencer
Microsoft MVP

DSI PrintManager, Miradyne Component Libraries:
http://www.miradyne.net

"pamela fluente"  wrote in message 
news:1187693326.239309.171010@g4g2000hsf.googlegroups.com...

>
> I have placed a button on a page to open a pdf stored on another
> site.
>
> When the user clicks on the button I do a Redirect to the pdf URL
> ... and this seems to work fine.
>
> Question: is this the best way to do that ?
>
> In case the PDF file,   http://My.server.com/MyPdf.pdf  is not on the
> server
> how can I detect this condition within the program and inform the
> user, instead of letting
> him to receive an error page ?
>
> -P
> 

On 21 Ago, 13:16, "Patrice" <http://www.chez.com/scribe/> wrote:

> You could use System.net.WebClient to send HTTP requests to this third party
> server (possibly using a HEAD request at a lower level if you want just to
> check for the presence of this file wihtout downloading it).
>
> ---
> Patrice
>
> "pamela fluente"  a écrit dans le message de news:
> 1187693326.239309.171...@g4g2000hsf.googlegroups.com...
>
>
>
>
>
> > I have placed a button on a page to open a pdf stored on another
> > site.
>
> > When the user clicks on the button I do a Redirect to the pdf URL
> > ... and this seems to work fine.
>
> > Question: is this the best way to do that ?
>
> > In case the PDF file,  http://My.server.com/MyPdf.pdf is not on the
> > server
> > how can I detect this condition within the program and inform the
> > user, instead of letting
> > him to receive an error page ?
>
> > -P- Nascondi testo tra virgolette -
>
> - Mostra testo tra virgolette -


Do you have a simple snippet of this procedure?

Thank you.

-P

Try :

http://msdn2.microsoft.com/en-us/library/ez801hhe.aspx to download the whole 
file (and scroll down to the code samples that shows how to download a gif 
file from a web site). Is it me or is MSDN slow ?

Or :
http://www.eggheadcafe.com/tutorials/aspnet/2c13cafc-be1c-4dd8-9129-f82f59991517/the-lowly-http-head-reque.aspx
if you want just to check that the file is still available

http://en.wikipedia.org/wiki/Http#Request_methods discusses the various HTTP 
method (basically GET gets the whole content, while HEAD will just retrieve 
the header).

---
Patrice


"pamela fluente"  a crit dans le message de news: 
1187712918.166928.169160@k79g2000hse.googlegroups.com...
On 21 Ago, 13:16, "Patrice" <http://www.chez.com/scribe/> wrote:

> You could use System.net.WebClient to send HTTP requests to this third 
> party
> server (possibly using a HEAD request at a lower level if you want just to
> check for the presence of this file wihtout downloading it).
>
> ---
> Patrice
>
> "pamela fluente"  a crit dans le message de 
> news:
> 1187693326.239309.171...@g4g2000hsf.googlegroups.com...
>
>
>
>
>
> > I have placed a button on a page to open a pdf stored on another
> > site.
>
> > When the user clicks on the button I do a Redirect to the pdf URL
> > ... and this seems to work fine.
>
> > Question: is this the best way to do that ?
>
> > In case the PDF file,  http://My.server.com/MyPdf.pdf is not on the
> > server
> > how can I detect this condition within the program and inform the
> > user, instead of letting
> > him to receive an error page ?
>
> > -P- Nascondi testo tra virgolette -
>
> - Mostra testo tra virgolette -


Do you have a simple snippet of this procedure?

Thank you.

-P

On 21 Ago, 18:47, "Patrice" <http://www.chez.com/scribe/> wrote:

> Try :
>
> http://msdn2.microsoft.com/en-us/library/ez801hhe.aspxto download the whole
> file (and scroll down to the code samples that shows how to download a gif
> file from a web site). Is it me or is MSDN slow ?
>
> Or :http://www.eggheadcafe.com/tutorials/aspnet/2c13cafc-be1c-4dd8-9129-f....
> if you want just to check that the file is still available
>
> http://en.wikipedia.org/wiki/Http#Request_methodsdiscusses the various HTTP
> method (basically GET gets the whole content, while HEAD will just retrieve
> the header).
>
> ---
> Patrice
>
> "pamela fluente"  a écrit dans le message de news:
> 1187712918.166928.169...@k79g2000hse.googlegroups.com...
> On 21 Ago, 13:16, "Patrice" <http://www.chez.com/scribe/> wrote:
>
>
>
>
>
> > You could use System.net.WebClient to send HTTP requests to this third
> > party
> > server (possibly using a HEAD request at a lower level if you want just to
> > check for the presence of this file wihtout downloading it).
>
> > ---
> > Patrice
>
> > "pamela fluente"  a écrit dans le message de
> > news:
> > 1187693326.239309.171...@g4g2000hsf.googlegroups.com...
>
> > > I have placed a button on a page to open a pdf stored on another
> > > site.
>
> > > When the user clicks on the button I do a Redirect to the pdf URL
> > > ... and this seems to work fine.
>
> > > Question: is this the best way to do that ?
>
> > > In case the PDF file,  http://My.server.com/MyPdf.pdfis not on the
> > > server
> > > how can I detect this condition within the program and inform the
> > > user, instead of letting
> > > him to receive an error page ?
>
> > > -P- Nascondi testo tra virgolette -
>
> > - Mostra testo tra virgolette -
>
> Do you have a simple snippet of this procedure?
>
> Thank you.
>
> -P- Nascondi testo tra virgolette -
>
> - Mostra testo tra virgolette -


Thanks a lot!

-P