Re: Stream pdf to browser

That's what I did the page comes up with no problem the call to the
webservice works, but the file does not show in the browser, if I put a
button on the page that does the same exact call to the web service it works
fine.

Page 1 calls page dedicated to call to web service:
Button2.Attributes.Add("onclick", "window.open('webform2.aspx?f=" &
txtFile.Text & "','mywindow')")

Page2 calls web service and flush to browser:
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
getfile()

End If

End Sub

Private Sub getfile()

Dim ffile As FileInfo

Dim ws As webservice

Dim sFile As String = Request.QueryString("f")

Try

ws = New webservice

ws.Credentials = getcredentials

Dim Buffer() As Byte = ws.GetFileBuffer(sFile)

Response.BufferOutput = True

Response.ClearContent()

Response.ClearHeaders()

Response.AddHeader("Content-Length", Buffer.Length.ToString)

Response.AddHeader("content-disposition", "inline;filename=YourReport.pdf")

Response.ContentType = "application/pdf"

Response.BinaryWrite(Buffer)

Response.Flush()

Response.Clear()

Catch ex As Exception

Finally

ffile = Nothing

nref = Nothing

End Try

End Sub

"Steven Cheng[MSFT]" <stcheng@xxxxxxxxxxxxxxxxxxxx> wrote in message
news:y1M4Q$ekHHA.1144@xxxxxxxxxxxxxxxxxxxxxxxxx
Hi Rick,

From your description, you're using webservice to expose some PDF stream
from backend file or database and stream them to web application(let web
application flush the pdf content to client). currently you're wondering
how to make the web application display the pdf stream download in a
separate browser window from the main window(which trigger the postback)
,correct?

Based on my experience, a typical approach to do this is a below:

1. You should create a separate page which dedicate to retrieving binary
content from the webservice(that return pdf buffer) and stream it out to
web page response). This page will use some url querystring as parameter
to
identify which pdf file to retrieve from webservice.

2. In your main web page, when you click a button and postback to retrieve
pdf stream, you just simply register some client-side script that will
open
a new browser window, the url is just the dedicated page created in #1 and
append some url querystring (indicate which pdf file to open).

How do you think?

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead



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