System.Net.WebClient.DownloadFile doesn't work with http attachments

[A.M-SG]

Hi,

I have an aspx page at the web server that provides PDF documents for smart
client applications.

Here is the code in aspx page that defines content type:

Response.Conten tType = "applicatio n/octet-stream";
Response.Append Header("Content-Disposition", "attachment;fil ename=" +
fileID.ToString () + ".pdf");

I tested the aspx page by using browser and it works just fine.

Now I need to receive that file by using the
System.Net.WebC lient.DownloadF ile. The problem is that DownloadFile method
returns the following exception:

"Unable to read data from the transport connection: The connection was
closed."

I tested the DownloadFile method to open a direct pdf file like the
following statement:

(new
System.Net.WebC lient()).Downlo adFile(http://localhost/test.pdf,"c:\\t est.pdf");

It works just fine.

How can I use System.Net.WebC lient. DownloadFile to download http
attachments?

Any help would be apprecited,
Alan

[Steven Cheng[MSFT]]

RE: System.Net.WebC lient.DownloadF ile doesn't work with http attachments

Hi Alan,

Welcome to MSDN newsgroup.
Regarding on the file downloading through WebClient class problem you
mentioned, seems a bit strange from a general view. It is possible a
machine specific issue. here is a test page's code which could be correctly
used (let client user webbrowser or webclient class to download the file)
on my side:

=============== ===
private void Page_Load(objec t sender, System.EventArg s e)
{
Response.ClearH eaders();
Response.ClearC ontent();
Response.Conten tType = "applicatio n/octet-stream";

Response.Append Header("Content-Disposition","a ttachment;filen ame=test.pdf");

Response.WriteF ile(Server.MapP ath("~/files/test.pdf"));

Response.End();
}
=============== ===

You can try the above code in your page to see whether it works. Also, you
can run the webclient from multiple client to see whether it is client
specific.

Thanks,

Steven Cheng
Microsoft Online Support

Get Secure! www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)




--------------------
| From: "A.M-SG" <alanalan@newsg roup.nospam>
| Subject: System.Net.WebC lient.DownloadF ile doesn't work with http
attachments
| Date: Mon, 31 Oct 2005 18:45:48 -0500
| Lines: 35
| X-Priority: 3
| X-MSMail-Priority: Normal
| X-Newsreader: Microsoft Outlook Express 6.00.2900.2180
| X-RFC2646: Format=Flowed; Original
| X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180
| Message-ID: <#Nwo3Un3FHA.36 00@TK2MSFTNGP12 .phx.gbl>
| Newsgroups: microsoft.publi c.dotnet.langua ges.csharp
| NNTP-Posting-Host: hse-toronto-ppp3484752.symp atico.ca 65.92.97.129
| Path: TK2MSFTNGXA01.p hx.gbl!TK2MSFTN GP08.phx.gbl!TK 2MSFTNGP12.phx. gbl
| Xref: TK2MSFTNGXA01.p hx.gbl
microsoft.publi c.dotnet.langua ges.csharp:1330 60
| X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.csharp
|
| Hi,
|
| I have an aspx page at the web server that provides PDF documents for
smart
| client applications.
|
| Here is the code in aspx page that defines content type:
|
| Response.Conten tType = "applicatio n/octet-stream";
| Response.Append Header("Content-Disposition", "attachment;fil ename=" +
| fileID.ToString () + ".pdf");
|
| I tested the aspx page by using browser and it works just fine.
|
| Now I need to receive that file by using the
| System.Net.WebC lient.DownloadF ile. The problem is that DownloadFile
method
| returns the following exception:
|
| "Unable to read data from the transport connection: The connection was
| closed."
|
| I tested the DownloadFile method to open a direct pdf file like the
| following statement:
|
| (new
|
System.Net.WebC lient()).Downlo adFile(http://localhost/test.pdf,"c:\\t est.pdf
");
|
| It works just fine.
|
| How can I use System.Net.WebC lient. DownloadFile to download http
| attachments?
|
| Any help would be apprecited,
| Alan
|
|
|

[A.M-SG]

Re: System.Net.WebC lient.DownloadF ile doesn't work with http attachments

Hi Steven,

Firstly thank you for your reply.

The code that you provided is not my question.

My question is: "How to receive that pdf file at the client side?"

The server side is done and it is similar to what you mentioned in your
reply.

I tried to receive the pdf file (test.pdf in your sample) by using
System.Net.WebC lient.DownloadF ile, but it throws exception.

Regards,
Alan



"Steven Cheng[MSFT]" <stcheng@online .microsoft.com> wrote in message
news:CXg1MTu3FH A.3220@TK2MSFTN GXA01.phx.gbl.. .[color=blue]
> Hi Alan,
>
> Welcome to MSDN newsgroup.
> Regarding on the file downloading through WebClient class problem you
> mentioned, seems a bit strange from a general view. It is possible a
> machine specific issue. here is a test page's code which could be
> correctly
> used (let client user webbrowser or webclient class to download the file)
> on my side:
>
> =============== ===
> private void Page_Load(objec t sender, System.EventArg s e)
> {
> Response.ClearH eaders();
> Response.ClearC ontent();
> Response.Conten tType = "applicatio n/octet-stream";
>
> Response.Append Header("Content-Disposition","a ttachment;filen ame=test.pdf");
>
> Response.WriteF ile(Server.MapP ath("~/files/test.pdf"));
>
> Response.End();
> }
> =============== ===
>
> You can try the above code in your page to see whether it works. Also, you
> can run the webclient from multiple client to see whether it is client
> specific.
>
> Thanks,
>
> Steven Cheng
> Microsoft Online Support
>
> Get Secure! www.microsoft.com/security
> (This posting is provided "AS IS", with no warranties, and confers no
> rights.)
>
>
>
>
> --------------------
> | From: "A.M-SG" <alanalan@newsg roup.nospam>
> | Subject: System.Net.WebC lient.DownloadF ile doesn't work with http
> attachments
> | Date: Mon, 31 Oct 2005 18:45:48 -0500
> | Lines: 35
> | X-Priority: 3
> | X-MSMail-Priority: Normal
> | X-Newsreader: Microsoft Outlook Express 6.00.2900.2180
> | X-RFC2646: Format=Flowed; Original
> | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180
> | Message-ID: <#Nwo3Un3FHA.36 00@TK2MSFTNGP12 .phx.gbl>
> | Newsgroups: microsoft.publi c.dotnet.langua ges.csharp
> | NNTP-Posting-Host: hse-toronto-ppp3484752.symp atico.ca 65.92.97.129
> | Path: TK2MSFTNGXA01.p hx.gbl!TK2MSFTN GP08.phx.gbl!TK 2MSFTNGP12.phx. gbl
> | Xref: TK2MSFTNGXA01.p hx.gbl
> microsoft.publi c.dotnet.langua ges.csharp:1330 60
> | X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.csharp
> |
> | Hi,
> |
> | I have an aspx page at the web server that provides PDF documents for
> smart
> | client applications.
> |
> | Here is the code in aspx page that defines content type:
> |
> | Response.Conten tType = "applicatio n/octet-stream";
> | Response.Append Header("Content-Disposition", "attachment;fil ename=" +
> | fileID.ToString () + ".pdf");
> |
> | I tested the aspx page by using browser and it works just fine.
> |
> | Now I need to receive that file by using the
> | System.Net.WebC lient.DownloadF ile. The problem is that DownloadFile
> method
> | returns the following exception:
> |
> | "Unable to read data from the transport connection: The connection was
> | closed."
> |
> | I tested the DownloadFile method to open a direct pdf file like the
> | following statement:
> |
> | (new
> |
> System.Net.WebC lient()).Downlo adFile(http://localhost/test.pdf,"c:\\t est.pdf
> ");
> |
> | It works just fine.
> |
> | How can I use System.Net.WebC lient. DownloadFile to download http
> | attachments?
> |
> | Any help would be apprecited,
> | Alan
> |
> |
> |
>[/color]

[Steven Cheng[MSFT]]

Re: System.Net.WebC lient.DownloadF ile doesn't work with http attachments

Hi Alan,

Yes, I know the serverside code won't have big difference , nor does the
client code. That's why I think this should be a environment specific
issue. Here is the client code I've used to test , (both use WebClient and
HttpWebRequest ....) , the code work correctly on my test environment.

=============== ==========
static void Main(string[] args)
{


DownloadByWebCl ient();


DownloadByHttpW ebRequest();
}

static void DownloadByWebCl ient()
{
string url =
"http://localhost/StevenRoot/ControlWebApp/filedownload.as px";
string clientfile = @"d:\temp\test_ webclient.pdf";

WebClient wc = new WebClient();

wc.DownloadFile (url,clientfile );

}

static void DownloadByHttpW ebRequest()
{
string url =
"http://localhost/StevenRoot/ControlWebApp/filedownload.as px";
string clientfile = @"d:\temp\test_ webrequest.pdf" ;

HttpWebRequest req = WebRequest.Crea te(url) as HttpWebRequest;

req.Method = "GET";
req.KeepAlive = true;

HttpWebResponse rep = req.GetResponse () as HttpWebResponse ;

Stream stream = rep.GetResponse Stream();

FileStream fs = new FileStream(clie ntfile, FileMode.Create ,
FileAccess.Writ e);

byte[] buf = new byte[1024];

int i = 0;

while( (i=stream.Read( buf,0,buf.Lengt h))> 0)
{
fs.Write(buf,0, i);
}

fs.Close();

stream.Close();

rep.Close();

}
=============== =============

In addition, you can also try comment the below line in your serverside
code to see whether it helps:

Response.Append Header("Content-Disposition", "attachment;fil ename=" +
fileID.ToString () + ".pdf");

Thanks,

Steven Cheng
Microsoft Online Support

Get Secure! www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)

--------------------
| From: "A.M-SG" <alanalan@newsg roup.nospam>
| References: <#Nwo3Un3FHA.36 00@TK2MSFTNGP12 .phx.gbl>
<CXg1MTu3FHA.32 20@TK2MSFTNGXA0 1.phx.gbl>
| Subject: Re: System.Net.WebC lient.DownloadF ile doesn't work with http
attachments
| Date: Tue, 1 Nov 2005 08:15:42 -0500
| Lines: 124
| X-Priority: 3
| X-MSMail-Priority: Normal
| X-Newsreader: Microsoft Outlook Express 6.00.3790.1830
| X-RFC2646: Format=Flowed; Original
| X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.1830
| Message-ID: <#Hcn3Yu3FHA.28 16@tk2msftngp13 .phx.gbl>
| Newsgroups: microsoft.publi c.dotnet.langua ges.csharp
| NNTP-Posting-Host: toronto-hse-ppp4253404.symp atico.ca 70.52.252.114
| Path: TK2MSFTNGXA01.p hx.gbl!TK2MSFTN GP08.phx.gbl!tk 2msftngp13.phx. gbl
| Xref: TK2MSFTNGXA01.p hx.gbl
microsoft.publi c.dotnet.langua ges.csharp:1331 23
| X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.csharp
|
| Hi Steven,
|
| Firstly thank you for your reply.
|
| The code that you provided is not my question.
|
| My question is: "How to receive that pdf file at the client side?"
|
| The server side is done and it is similar to what you mentioned in your
| reply.
|
| I tried to receive the pdf file (test.pdf in your sample) by using
| System.Net.WebC lient.DownloadF ile, but it throws exception.
|
| Regards,
| Alan
|
|
|
| "Steven Cheng[MSFT]" <stcheng@online .microsoft.com> wrote in message
| news:CXg1MTu3FH A.3220@TK2MSFTN GXA01.phx.gbl.. .
| > Hi Alan,
| >
| > Welcome to MSDN newsgroup.
| > Regarding on the file downloading through WebClient class problem you
| > mentioned, seems a bit strange from a general view. It is possible a
| > machine specific issue. here is a test page's code which could be
| > correctly
| > used (let client user webbrowser or webclient class to download the
file)
| > on my side:
| >
| > =============== ===
| > private void Page_Load(objec t sender, System.EventArg s e)
| > {
| > Response.ClearH eaders();
| > Response.ClearC ontent();
| > Response.Conten tType = "applicatio n/octet-stream";
| >
| >
Response.Append Header("Content-Disposition","a ttachment;filen ame=test.pdf");
| >
| > Response.WriteF ile(Server.MapP ath("~/files/test.pdf"));
| >
| > Response.End();
| > }
| > =============== ===
| >
| > You can try the above code in your page to see whether it works. Also,
you
| > can run the webclient from multiple client to see whether it is client
| > specific.
| >
| > Thanks,
| >
| > Steven Cheng
| > Microsoft Online Support
| >
| > Get Secure! www.microsoft.com/security
| > (This posting is provided "AS IS", with no warranties, and confers no
| > rights.)
| >
| >
| >
| >
| > --------------------
| > | From: "A.M-SG" <alanalan@newsg roup.nospam>
| > | Subject: System.Net.WebC lient.DownloadF ile doesn't work with http
| > attachments
| > | Date: Mon, 31 Oct 2005 18:45:48 -0500
| > | Lines: 35
| > | X-Priority: 3
| > | X-MSMail-Priority: Normal
| > | X-Newsreader: Microsoft Outlook Express 6.00.2900.2180
| > | X-RFC2646: Format=Flowed; Original
| > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180
| > | Message-ID: <#Nwo3Un3FHA.36 00@TK2MSFTNGP12 .phx.gbl>
| > | Newsgroups: microsoft.publi c.dotnet.langua ges.csharp
| > | NNTP-Posting-Host: hse-toronto-ppp3484752.symp atico.ca 65.92.97.129
| > | Path: TK2MSFTNGXA01.p hx.gbl!TK2MSFTN GP08.phx.gbl!TK 2MSFTNGP12.phx. gbl
| > | Xref: TK2MSFTNGXA01.p hx.gbl
| > microsoft.publi c.dotnet.langua ges.csharp:1330 60
| > | X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.csharp
| > |
| > | Hi,
| > |
| > | I have an aspx page at the web server that provides PDF documents for
| > smart
| > | client applications.
| > |
| > | Here is the code in aspx page that defines content type:
| > |
| > | Response.Conten tType = "applicatio n/octet-stream";
| > | Response.Append Header("Content-Disposition", "attachment;fil ename=" +
| > | fileID.ToString () + ".pdf");
| > |
| > | I tested the aspx page by using browser and it works just fine.
| > |
| > | Now I need to receive that file by using the
| > | System.Net.WebC lient.DownloadF ile. The problem is that DownloadFile
| > method
| > | returns the following exception:
| > |
| > | "Unable to read data from the transport connection: The connection was
| > | closed."
| > |
| > | I tested the DownloadFile method to open a direct pdf file like the
| > | following statement:
| > |
| > | (new
| > |
| >
System.Net.WebC lient()).Downlo adFile(http://localhost/test.pdf,"c:\\t est.pdf
| > ");
| > |
| > | It works just fine.
| > |
| > | How can I use System.Net.WebC lient. DownloadFile to download http
| > | attachments?
| > |
| > | Any help would be apprecited,
| > | Alan
| > |
| > |
| > |
| >
|
|
|

[Steven Cheng[MSFT]]

Re: System.Net.WebC lient.DownloadF ile doesn't work with http attachments

Hi Alan,

How are you doing on this issue, have you got any further progress? If
there're anything else we can help, please feel free to post here. Thanks,

Steven Cheng
Microsoft Online Support

Get Secure! www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)
--------------------
| X-Tomcat-ID: 66213528
| References: <#Nwo3Un3FHA.36 00@TK2MSFTNGP12 .phx.gbl>
<CXg1MTu3FHA.32 20@TK2MSFTNGXA0 1.phx.gbl>
<#Hcn3Yu3FHA.28 16@tk2msftngp13 .phx.gbl>
| MIME-Version: 1.0
| Content-Type: text/plain
| Content-Transfer-Encoding: 7bit
| From: stcheng@online. microsoft.com (Steven Cheng[MSFT])
| Organization: Microsoft
| Date: Wed, 02 Nov 2005 03:37:50 GMT
| Subject: Re: System.Net.WebC lient.DownloadF ile doesn't work with http
attachments
| X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.csharp
| Message-ID: <8hGwY713FHA.11 44@TK2MSFTNGXA0 1.phx.gbl>
| Newsgroups: microsoft.publi c.dotnet.langua ges.csharp
| Lines: 167
| Path: TK2MSFTNGXA01.p hx.gbl
| Xref: TK2MSFTNGXA01.p hx.gbl
microsoft.publi c.dotnet.langua ges.csharp:1333 08
| NNTP-Posting-Host: TOMCATIMPORT1 10.201.218.122
|
| Hi Alan,
|
| Yes, I know the serverside code won't have big difference , nor does the
| client code. That's why I think this should be a environment specific
| issue. Here is the client code I've used to test , (both use WebClient
and
| HttpWebRequest ....) , the code work correctly on my test environment.
|
| =============== ==========
| static void Main(string[] args)
| {
|
|
| DownloadByWebCl ient();
|
|
| DownloadByHttpW ebRequest();
| }
|
| static void DownloadByWebCl ient()
| {
| string url =
| "http://localhost/StevenRoot/ControlWebApp/filedownload.as px";
| string clientfile = @"d:\temp\test_ webclient.pdf";
|
| WebClient wc = new WebClient();
|
| wc.DownloadFile (url,clientfile );
|
| }
|
| static void DownloadByHttpW ebRequest()
| {
| string url =
| "http://localhost/StevenRoot/ControlWebApp/filedownload.as px";
| string clientfile = @"d:\temp\test_ webrequest.pdf" ;
|
| HttpWebRequest req = WebRequest.Crea te(url) as HttpWebRequest;
|
| req.Method = "GET";
| req.KeepAlive = true;
|
| HttpWebResponse rep = req.GetResponse () as HttpWebResponse ;
|
| Stream stream = rep.GetResponse Stream();
|
| FileStream fs = new FileStream(clie ntfile, FileMode.Create ,
| FileAccess.Writ e);
|
| byte[] buf = new byte[1024];
|
| int i = 0;
|
| while( (i=stream.Read( buf,0,buf.Lengt h))> 0)
| {
| fs.Write(buf,0, i);
| }
|
| fs.Close();
|
| stream.Close();
|
| rep.Close();
|
| }
| =============== =============
|
| In addition, you can also try comment the below line in your serverside
| code to see whether it helps:
|
| Response.Append Header("Content-Disposition", "attachment;fil ename=" +
| fileID.ToString () + ".pdf");
|
| Thanks,
|
| Steven Cheng
| Microsoft Online Support
|
| Get Secure! www.microsoft.com/security
| (This posting is provided "AS IS", with no warranties, and confers no
| rights.)
|
| --------------------
| | From: "A.M-SG" <alanalan@newsg roup.nospam>
| | References: <#Nwo3Un3FHA.36 00@TK2MSFTNGP12 .phx.gbl>
| <CXg1MTu3FHA.32 20@TK2MSFTNGXA0 1.phx.gbl>
| | Subject: Re: System.Net.WebC lient.DownloadF ile doesn't work with http
| attachments
| | Date: Tue, 1 Nov 2005 08:15:42 -0500
| | Lines: 124
| | X-Priority: 3
| | X-MSMail-Priority: Normal
| | X-Newsreader: Microsoft Outlook Express 6.00.3790.1830
| | X-RFC2646: Format=Flowed; Original
| | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.1830
| | Message-ID: <#Hcn3Yu3FHA.28 16@tk2msftngp13 .phx.gbl>
| | Newsgroups: microsoft.publi c.dotnet.langua ges.csharp
| | NNTP-Posting-Host: toronto-hse-ppp4253404.symp atico.ca 70.52.252.114
| | Path: TK2MSFTNGXA01.p hx.gbl!TK2MSFTN GP08.phx.gbl!tk 2msftngp13.phx. gbl
| | Xref: TK2MSFTNGXA01.p hx.gbl
| microsoft.publi c.dotnet.langua ges.csharp:1331 23
| | X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.csharp
| |
| | Hi Steven,
| |
| | Firstly thank you for your reply.
| |
| | The code that you provided is not my question.
| |
| | My question is: "How to receive that pdf file at the client side?"
| |
| | The server side is done and it is similar to what you mentioned in your
| | reply.
| |
| | I tried to receive the pdf file (test.pdf in your sample) by using
| | System.Net.WebC lient.DownloadF ile, but it throws exception.
| |
| | Regards,
| | Alan
| |
| |
| |
| | "Steven Cheng[MSFT]" <stcheng@online .microsoft.com> wrote in message
| | news:CXg1MTu3FH A.3220@TK2MSFTN GXA01.phx.gbl.. .
| | > Hi Alan,
| | >
| | > Welcome to MSDN newsgroup.
| | > Regarding on the file downloading through WebClient class problem you
| | > mentioned, seems a bit strange from a general view. It is possible a
| | > machine specific issue. here is a test page's code which could be
| | > correctly
| | > used (let client user webbrowser or webclient class to download the
| file)
| | > on my side:
| | >
| | > =============== ===
| | > private void Page_Load(objec t sender, System.EventArg s e)
| | > {
| | > Response.ClearH eaders();
| | > Response.ClearC ontent();
| | > Response.Conten tType = "applicatio n/octet-stream";
| | >
| | >
|
Response.Append Header("Content-Disposition","a ttachment;filen ame=test.pdf");
| | >
| | > Response.WriteF ile(Server.MapP ath("~/files/test.pdf"));
| | >
| | > Response.End();
| | > }
| | > =============== ===
| | >
| | > You can try the above code in your page to see whether it works.
Also,
| you
| | > can run the webclient from multiple client to see whether it is client
| | > specific.
| | >
| | > Thanks,
| | >
| | > Steven Cheng
| | > Microsoft Online Support
| | >
| | > Get Secure! www.microsoft.com/security
| | > (This posting is provided "AS IS", with no warranties, and confers no
| | > rights.)
| | >
| | >
| | >
| | >
| | > --------------------
| | > | From: "A.M-SG" <alanalan@newsg roup.nospam>
| | > | Subject: System.Net.WebC lient.DownloadF ile doesn't work with http
| | > attachments
| | > | Date: Mon, 31 Oct 2005 18:45:48 -0500
| | > | Lines: 35
| | > | X-Priority: 3
| | > | X-MSMail-Priority: Normal
| | > | X-Newsreader: Microsoft Outlook Express 6.00.2900.2180
| | > | X-RFC2646: Format=Flowed; Original
| | > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180
| | > | Message-ID: <#Nwo3Un3FHA.36 00@TK2MSFTNGP12 .phx.gbl>
| | > | Newsgroups: microsoft.publi c.dotnet.langua ges.csharp
| | > | NNTP-Posting-Host: hse-toronto-ppp3484752.symp atico.ca 65.92.97.129
| | > | Path:
TK2MSFTNGXA01.p hx.gbl!TK2MSFTN GP08.phx.gbl!TK 2MSFTNGP12.phx. gbl
| | > | Xref: TK2MSFTNGXA01.p hx.gbl
| | > microsoft.publi c.dotnet.langua ges.csharp:1330 60
| | > | X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.csharp
| | > |
| | > | Hi,
| | > |
| | > | I have an aspx page at the web server that provides PDF documents
for
| | > smart
| | > | client applications.
| | > |
| | > | Here is the code in aspx page that defines content type:
| | > |
| | > | Response.Conten tType = "applicatio n/octet-stream";
| | > | Response.Append Header("Content-Disposition", "attachment;fil ename="
+
| | > | fileID.ToString () + ".pdf");
| | > |
| | > | I tested the aspx page by using browser and it works just fine.
| | > |
| | > | Now I need to receive that file by using the
| | > | System.Net.WebC lient.DownloadF ile. The problem is that DownloadFile
| | > method
| | > | returns the following exception:
| | > |
| | > | "Unable to read data from the transport connection: The connection
was
| | > | closed."
| | > |
| | > | I tested the DownloadFile method to open a direct pdf file like the
| | > | following statement:
| | > |
| | > | (new
| | > |
| | >
|
System.Net.WebC lient()).Downlo adFile(http://localhost/test.pdf,"c:\\t est.pdf
| | > ");
| | > |
| | > | It works just fine.
| | > |
| | > | How can I use System.Net.WebC lient. DownloadFile to download http
| | > | attachments?
| | > |
| | > | Any help would be apprecited,
| | > | Alan
| | > |
| | > |
| | > |
| | >
| |
| |
| |
|
|

[A.M-SG]

Re: System.Net.WebC lient.DownloadF ile doesn't work with http attachments

Hi Steven.

Yes, I got it working. Thank you for your help.

Ali



"Steven Cheng[MSFT]" <stcheng@online .microsoft.com> wrote in message
news:cZPb$xh4FH A.2904@TK2MSFTN GXA01.phx.gbl.. .[color=blue]
> Hi Alan,
>
> How are you doing on this issue, have you got any further progress? If
> there're anything else we can help, please feel free to post here. Thanks,
>
> Steven Cheng
> Microsoft Online Support
>
> Get Secure! www.microsoft.com/security
> (This posting is provided "AS IS", with no warranties, and confers no
> rights.)
> --------------------
> | X-Tomcat-ID: 66213528
> | References: <#Nwo3Un3FHA.36 00@TK2MSFTNGP12 .phx.gbl>
> <CXg1MTu3FHA.32 20@TK2MSFTNGXA0 1.phx.gbl>
> <#Hcn3Yu3FHA.28 16@tk2msftngp13 .phx.gbl>
> | MIME-Version: 1.0
> | Content-Type: text/plain
> | Content-Transfer-Encoding: 7bit
> | From: stcheng@online. microsoft.com (Steven Cheng[MSFT])
> | Organization: Microsoft
> | Date: Wed, 02 Nov 2005 03:37:50 GMT
> | Subject: Re: System.Net.WebC lient.DownloadF ile doesn't work with http
> attachments
> | X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.csharp
> | Message-ID: <8hGwY713FHA.11 44@TK2MSFTNGXA0 1.phx.gbl>
> | Newsgroups: microsoft.publi c.dotnet.langua ges.csharp
> | Lines: 167
> | Path: TK2MSFTNGXA01.p hx.gbl
> | Xref: TK2MSFTNGXA01.p hx.gbl
> microsoft.publi c.dotnet.langua ges.csharp:1333 08
> | NNTP-Posting-Host: TOMCATIMPORT1 10.201.218.122
> |
> | Hi Alan,
> |
> | Yes, I know the serverside code won't have big difference , nor does the
> | client code. That's why I think this should be a environment specific
> | issue. Here is the client code I've used to test , (both use WebClient
> and
> | HttpWebRequest ....) , the code work correctly on my test environment.
> |
> | =============== ==========
> | static void Main(string[] args)
> | {
> |
> |
> | DownloadByWebCl ient();
> |
> |
> | DownloadByHttpW ebRequest();
> | }
> |
> | static void DownloadByWebCl ient()
> | {
> | string url =
> | "http://localhost/StevenRoot/ControlWebApp/filedownload.as px";
> | string clientfile = @"d:\temp\test_ webclient.pdf";
> |
> | WebClient wc = new WebClient();
> |
> | wc.DownloadFile (url,clientfile );
> |
> | }
> |
> | static void DownloadByHttpW ebRequest()
> | {
> | string url =
> | "http://localhost/StevenRoot/ControlWebApp/filedownload.as px";
> | string clientfile = @"d:\temp\test_ webrequest.pdf" ;
> |
> | HttpWebRequest req = WebRequest.Crea te(url) as HttpWebRequest;
> |
> | req.Method = "GET";
> | req.KeepAlive = true;
> |
> | HttpWebResponse rep = req.GetResponse () as HttpWebResponse ;
> |
> | Stream stream = rep.GetResponse Stream();
> |
> | FileStream fs = new FileStream(clie ntfile, FileMode.Create ,
> | FileAccess.Writ e);
> |
> | byte[] buf = new byte[1024];
> |
> | int i = 0;
> |
> | while( (i=stream.Read( buf,0,buf.Lengt h))> 0)
> | {
> | fs.Write(buf,0, i);
> | }
> |
> | fs.Close();
> |
> | stream.Close();
> |
> | rep.Close();
> |
> | }
> | =============== =============
> |
> | In addition, you can also try comment the below line in your serverside
> | code to see whether it helps:
> |
> | Response.Append Header("Content-Disposition", "attachment;fil ename=" +
> | fileID.ToString () + ".pdf");
> |
> | Thanks,
> |
> | Steven Cheng
> | Microsoft Online Support
> |
> | Get Secure! www.microsoft.com/security
> | (This posting is provided "AS IS", with no warranties, and confers no
> | rights.)
> |
> | --------------------
> | | From: "A.M-SG" <alanalan@newsg roup.nospam>
> | | References: <#Nwo3Un3FHA.36 00@TK2MSFTNGP12 .phx.gbl>
> | <CXg1MTu3FHA.32 20@TK2MSFTNGXA0 1.phx.gbl>
> | | Subject: Re: System.Net.WebC lient.DownloadF ile doesn't work with http
> | attachments
> | | Date: Tue, 1 Nov 2005 08:15:42 -0500
> | | Lines: 124
> | | X-Priority: 3
> | | X-MSMail-Priority: Normal
> | | X-Newsreader: Microsoft Outlook Express 6.00.3790.1830
> | | X-RFC2646: Format=Flowed; Original
> | | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.1830
> | | Message-ID: <#Hcn3Yu3FHA.28 16@tk2msftngp13 .phx.gbl>
> | | Newsgroups: microsoft.publi c.dotnet.langua ges.csharp
> | | NNTP-Posting-Host: toronto-hse-ppp4253404.symp atico.ca 70.52.252.114
> | | Path: TK2MSFTNGXA01.p hx.gbl!TK2MSFTN GP08.phx.gbl!tk 2msftngp13.phx. gbl
> | | Xref: TK2MSFTNGXA01.p hx.gbl
> | microsoft.publi c.dotnet.langua ges.csharp:1331 23
> | | X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.csharp
> | |
> | | Hi Steven,
> | |
> | | Firstly thank you for your reply.
> | |
> | | The code that you provided is not my question.
> | |
> | | My question is: "How to receive that pdf file at the client side?"
> | |
> | | The server side is done and it is similar to what you mentioned in
> your
> | | reply.
> | |
> | | I tried to receive the pdf file (test.pdf in your sample) by using
> | | System.Net.WebC lient.DownloadF ile, but it throws exception.
> | |
> | | Regards,
> | | Alan
> | |
> | |
> | |
> | | "Steven Cheng[MSFT]" <stcheng@online .microsoft.com> wrote in message
> | | news:CXg1MTu3FH A.3220@TK2MSFTN GXA01.phx.gbl.. .
> | | > Hi Alan,
> | | >
> | | > Welcome to MSDN newsgroup.
> | | > Regarding on the file downloading through WebClient class problem
> you
> | | > mentioned, seems a bit strange from a general view. It is possible a
> | | > machine specific issue. here is a test page's code which could be
> | | > correctly
> | | > used (let client user webbrowser or webclient class to download the
> | file)
> | | > on my side:
> | | >
> | | > =============== ===
> | | > private void Page_Load(objec t sender, System.EventArg s e)
> | | > {
> | | > Response.ClearH eaders();
> | | > Response.ClearC ontent();
> | | > Response.Conten tType = "applicatio n/octet-stream";
> | | >
> | | >
> |
> Response.Append Header("Content-Disposition","a ttachment;filen ame=test.pdf");
> | | >
> | | > Response.WriteF ile(Server.MapP ath("~/files/test.pdf"));
> | | >
> | | > Response.End();
> | | > }
> | | > =============== ===
> | | >
> | | > You can try the above code in your page to see whether it works.
> Also,
> | you
> | | > can run the webclient from multiple client to see whether it is
> client
> | | > specific.
> | | >
> | | > Thanks,
> | | >
> | | > Steven Cheng
> | | > Microsoft Online Support
> | | >
> | | > Get Secure! www.microsoft.com/security
> | | > (This posting is provided "AS IS", with no warranties, and confers
> no
> | | > rights.)
> | | >
> | | >
> | | >
> | | >
> | | > --------------------
> | | > | From: "A.M-SG" <alanalan@newsg roup.nospam>
> | | > | Subject: System.Net.WebC lient.DownloadF ile doesn't work with http
> | | > attachments
> | | > | Date: Mon, 31 Oct 2005 18:45:48 -0500
> | | > | Lines: 35
> | | > | X-Priority: 3
> | | > | X-MSMail-Priority: Normal
> | | > | X-Newsreader: Microsoft Outlook Express 6.00.2900.2180
> | | > | X-RFC2646: Format=Flowed; Original
> | | > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180
> | | > | Message-ID: <#Nwo3Un3FHA.36 00@TK2MSFTNGP12 .phx.gbl>
> | | > | Newsgroups: microsoft.publi c.dotnet.langua ges.csharp
> | | > | NNTP-Posting-Host: hse-toronto-ppp3484752.symp atico.ca
> 65.92.97.129
> | | > | Path:
> TK2MSFTNGXA01.p hx.gbl!TK2MSFTN GP08.phx.gbl!TK 2MSFTNGP12.phx. gbl
> | | > | Xref: TK2MSFTNGXA01.p hx.gbl
> | | > microsoft.publi c.dotnet.langua ges.csharp:1330 60
> | | > | X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.csharp
> | | > |
> | | > | Hi,
> | | > |
> | | > | I have an aspx page at the web server that provides PDF documents
> for
> | | > smart
> | | > | client applications.
> | | > |
> | | > | Here is the code in aspx page that defines content type:
> | | > |
> | | > | Response.Conten tType = "applicatio n/octet-stream";
> | | > | Response.Append Header("Content-Disposition",
> "attachment;fil ename="
> +
> | | > | fileID.ToString () + ".pdf");
> | | > |
> | | > | I tested the aspx page by using browser and it works just fine.
> | | > |
> | | > | Now I need to receive that file by using the
> | | > | System.Net.WebC lient.DownloadF ile. The problem is that
> DownloadFile
> | | > method
> | | > | returns the following exception:
> | | > |
> | | > | "Unable to read data from the transport connection: The connection
> was
> | | > | closed."
> | | > |
> | | > | I tested the DownloadFile method to open a direct pdf file like
> the
> | | > | following statement:
> | | > |
> | | > | (new
> | | > |
> | | >
> |
> System.Net.WebC lient()).Downlo adFile(http://localhost/test.pdf,"c:\\t est.pdf
> | | > ");
> | | > |
> | | > | It works just fine.
> | | > |
> | | > | How can I use System.Net.WebC lient. DownloadFile to download http
> | | > | attachments?
> | | > |
> | | > | Any help would be apprecited,
> | | > | Alan
> | | > |
> | | > |
> | | > |
> | | >
> | |
> | |
> | |
> |
> |
>[/color]

[Steven Cheng[MSFT]]

Re: System.Net.WebC lient.DownloadF ile doesn't work with http attachments

Thanks for your followup.

Glad that you've got it working.
Have a good day!

Steven Cheng
Microsoft Online Support

Get Secure! www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)
--------------------
| From: "A.M-SG" <alanalan@newsg roup.nospam>
| References: <#Nwo3Un3FHA.36 00@TK2MSFTNGP12 .phx.gbl>
<CXg1MTu3FHA.32 20@TK2MSFTNGXA0 1.phx.gbl>
<#Hcn3Yu3FHA.28 16@tk2msftngp13 .phx.gbl>
<8hGwY713FHA.11 44@TK2MSFTNGXA0 1.phx.gbl>
<cZPb$xh4FHA.29 04@TK2MSFTNGXA0 1.phx.gbl>
| Subject: Re: System.Net.WebC lient.DownloadF ile doesn't work with http
attachments
| Date: Mon, 7 Nov 2005 09:54:24 -0500
| Lines: 295
| X-Priority: 3
| X-MSMail-Priority: Normal
| X-Newsreader: Microsoft Outlook Express 6.00.2900.2180
| X-RFC2646: Format=Flowed; Original
| X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180
| Message-ID: <#WZ1ks64FHA.31 92@TK2MSFTNGP12 .phx.gbl>
| Newsgroups: microsoft.publi c.dotnet.langua ges.csharp
| NNTP-Posting-Host: Toronto-HSE-ppp3736481.symp atico.ca 67.68.49.178
| Path: TK2MSFTNGXA01.p hx.gbl!TK2MSFTN GP08.phx.gbl!TK 2MSFTNGP12.phx. gbl
| Xref: TK2MSFTNGXA01.p hx.gbl
microsoft.publi c.dotnet.langua ges.csharp:1344 83
| X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.csharp
|
| Hi Steven.
|
| Yes, I got it working. Thank you for your help.
|
| Ali
|
|
|
| "Steven Cheng[MSFT]" <stcheng@online .microsoft.com> wrote in message
| news:cZPb$xh4FH A.2904@TK2MSFTN GXA01.phx.gbl.. .
| > Hi Alan,
| >
| > How are you doing on this issue, have you got any further progress? If
| > there're anything else we can help, please feel free to post here.
Thanks,
| >
| > Steven Cheng
| > Microsoft Online Support
| >
| > Get Secure! www.microsoft.com/security
| > (This posting is provided "AS IS", with no warranties, and confers no
| > rights.)
| > --------------------
| > | X-Tomcat-ID: 66213528
| > | References: <#Nwo3Un3FHA.36 00@TK2MSFTNGP12 .phx.gbl>
| > <CXg1MTu3FHA.32 20@TK2MSFTNGXA0 1.phx.gbl>
| > <#Hcn3Yu3FHA.28 16@tk2msftngp13 .phx.gbl>
| > | MIME-Version: 1.0
| > | Content-Type: text/plain
| > | Content-Transfer-Encoding: 7bit
| > | From: stcheng@online. microsoft.com (Steven Cheng[MSFT])
| > | Organization: Microsoft
| > | Date: Wed, 02 Nov 2005 03:37:50 GMT
| > | Subject: Re: System.Net.WebC lient.DownloadF ile doesn't work with http
| > attachments
| > | X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.csharp
| > | Message-ID: <8hGwY713FHA.11 44@TK2MSFTNGXA0 1.phx.gbl>
| > | Newsgroups: microsoft.publi c.dotnet.langua ges.csharp
| > | Lines: 167
| > | Path: TK2MSFTNGXA01.p hx.gbl
| > | Xref: TK2MSFTNGXA01.p hx.gbl
| > microsoft.publi c.dotnet.langua ges.csharp:1333 08
| > | NNTP-Posting-Host: TOMCATIMPORT1 10.201.218.122
| > |
| > | Hi Alan,
| > |
| > | Yes, I know the serverside code won't have big difference , nor does
the
| > | client code. That's why I think this should be a environment specific
| > | issue. Here is the client code I've used to test , (both use WebClient
| > and
| > | HttpWebRequest ....) , the code work correctly on my test environment.
| > |
| > | =============== ==========
| > | static void Main(string[] args)
| > | {
| > |
| > |
| > | DownloadByWebCl ient();
| > |
| > |
| > | DownloadByHttpW ebRequest();
| > | }
| > |
| > | static void DownloadByWebCl ient()
| > | {
| > | string url =
| > | "http://localhost/StevenRoot/ControlWebApp/filedownload.as px";
| > | string clientfile = @"d:\temp\test_ webclient.pdf";
| > |
| > | WebClient wc = new WebClient();
| > |
| > | wc.DownloadFile (url,clientfile );
| > |
| > | }
| > |
| > | static void DownloadByHttpW ebRequest()
| > | {
| > | string url =
| > | "http://localhost/StevenRoot/ControlWebApp/filedownload.as px";
| > | string clientfile = @"d:\temp\test_ webrequest.pdf" ;
| > |
| > | HttpWebRequest req = WebRequest.Crea te(url) as HttpWebRequest;
| > |
| > | req.Method = "GET";
| > | req.KeepAlive = true;
| > |
| > | HttpWebResponse rep = req.GetResponse () as HttpWebResponse ;
| > |
| > | Stream stream = rep.GetResponse Stream();
| > |
| > | FileStream fs = new FileStream(clie ntfile, FileMode.Create ,
| > | FileAccess.Writ e);
| > |
| > | byte[] buf = new byte[1024];
| > |
| > | int i = 0;
| > |
| > | while( (i=stream.Read( buf,0,buf.Lengt h))> 0)
| > | {
| > | fs.Write(buf,0, i);
| > | }
| > |
| > | fs.Close();
| > |
| > | stream.Close();
| > |
| > | rep.Close();
| > |
| > | }
| > | =============== =============
| > |
| > | In addition, you can also try comment the below line in your
serverside
| > | code to see whether it helps:
| > |
| > | Response.Append Header("Content-Disposition", "attachment;fil ename=" +
| > | fileID.ToString () + ".pdf");
| > |
| > | Thanks,
| > |
| > | Steven Cheng
| > | Microsoft Online Support
| > |
| > | Get Secure! www.microsoft.com/security
| > | (This posting is provided "AS IS", with no warranties, and confers no
| > | rights.)
| > |
| > | --------------------
| > | | From: "A.M-SG" <alanalan@newsg roup.nospam>
| > | | References: <#Nwo3Un3FHA.36 00@TK2MSFTNGP12 .phx.gbl>
| > | <CXg1MTu3FHA.32 20@TK2MSFTNGXA0 1.phx.gbl>
| > | | Subject: Re: System.Net.WebC lient.DownloadF ile doesn't work with
http
| > | attachments
| > | | Date: Tue, 1 Nov 2005 08:15:42 -0500
| > | | Lines: 124
| > | | X-Priority: 3
| > | | X-MSMail-Priority: Normal
| > | | X-Newsreader: Microsoft Outlook Express 6.00.3790.1830
| > | | X-RFC2646: Format=Flowed; Original
| > | | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.1830
| > | | Message-ID: <#Hcn3Yu3FHA.28 16@tk2msftngp13 .phx.gbl>
| > | | Newsgroups: microsoft.publi c.dotnet.langua ges.csharp
| > | | NNTP-Posting-Host: toronto-hse-ppp4253404.symp atico.ca 70.52.252.114
| > | | Path:
TK2MSFTNGXA01.p hx.gbl!TK2MSFTN GP08.phx.gbl!tk 2msftngp13.phx. gbl
| > | | Xref: TK2MSFTNGXA01.p hx.gbl
| > | microsoft.publi c.dotnet.langua ges.csharp:1331 23
| > | | X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.csharp
| > | |
| > | | Hi Steven,
| > | |
| > | | Firstly thank you for your reply.
| > | |
| > | | The code that you provided is not my question.
| > | |
| > | | My question is: "How to receive that pdf file at the client side?"
| > | |
| > | | The server side is done and it is similar to what you mentioned in
| > your
| > | | reply.
| > | |
| > | | I tried to receive the pdf file (test.pdf in your sample) by using
| > | | System.Net.WebC lient.DownloadF ile, but it throws exception.
| > | |
| > | | Regards,
| > | | Alan
| > | |
| > | |
| > | |
| > | | "Steven Cheng[MSFT]" <stcheng@online .microsoft.com> wrote in message
| > | | news:CXg1MTu3FH A.3220@TK2MSFTN GXA01.phx.gbl.. .
| > | | > Hi Alan,
| > | | >
| > | | > Welcome to MSDN newsgroup.
| > | | > Regarding on the file downloading through WebClient class problem
| > you
| > | | > mentioned, seems a bit strange from a general view. It is
possible a
| > | | > machine specific issue. here is a test page's code which could be
| > | | > correctly
| > | | > used (let client user webbrowser or webclient class to download
the
| > | file)
| > | | > on my side:
| > | | >
| > | | > =============== ===
| > | | > private void Page_Load(objec t sender, System.EventArg s e)
| > | | > {
| > | | > Response.ClearH eaders();
| > | | > Response.ClearC ontent();
| > | | > Response.Conten tType = "applicatio n/octet-stream";
| > | | >
| > | | >
| > |
| >
Response.Append Header("Content-Disposition","a ttachment;filen ame=test.pdf");
| > | | >
| > | | > Response.WriteF ile(Server.MapP ath("~/files/test.pdf"));
| > | | >
| > | | > Response.End();
| > | | > }
| > | | > =============== ===
| > | | >
| > | | > You can try the above code in your page to see whether it works.
| > Also,
| > | you
| > | | > can run the webclient from multiple client to see whether it is
| > client
| > | | > specific.
| > | | >
| > | | > Thanks,
| > | | >
| > | | > Steven Cheng
| > | | > Microsoft Online Support
| > | | >
| > | | > Get Secure! www.microsoft.com/security
| > | | > (This posting is provided "AS IS", with no warranties, and
confers
| > no
| > | | > rights.)
| > | | >
| > | | >
| > | | >
| > | | >
| > | | > --------------------
| > | | > | From: "A.M-SG" <alanalan@newsg roup.nospam>
| > | | > | Subject: System.Net.WebC lient.DownloadF ile doesn't work with
http
| > | | > attachments
| > | | > | Date: Mon, 31 Oct 2005 18:45:48 -0500
| > | | > | Lines: 35
| > | | > | X-Priority: 3
| > | | > | X-MSMail-Priority: Normal
| > | | > | X-Newsreader: Microsoft Outlook Express 6.00.2900.2180
| > | | > | X-RFC2646: Format=Flowed; Original
| > | | > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180
| > | | > | Message-ID: <#Nwo3Un3FHA.36 00@TK2MSFTNGP12 .phx.gbl>
| > | | > | Newsgroups: microsoft.publi c.dotnet.langua ges.csharp
| > | | > | NNTP-Posting-Host: hse-toronto-ppp3484752.symp atico.ca
| > 65.92.97.129
| > | | > | Path:
| > TK2MSFTNGXA01.p hx.gbl!TK2MSFTN GP08.phx.gbl!TK 2MSFTNGP12.phx. gbl
| > | | > | Xref: TK2MSFTNGXA01.p hx.gbl
| > | | > microsoft.publi c.dotnet.langua ges.csharp:1330 60
| > | | > | X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.csharp
| > | | > |
| > | | > | Hi,
| > | | > |
| > | | > | I have an aspx page at the web server that provides PDF
documents
| > for
| > | | > smart
| > | | > | client applications.
| > | | > |
| > | | > | Here is the code in aspx page that defines content type:
| > | | > |
| > | | > | Response.Conten tType = "applicatio n/octet-stream";
| > | | > | Response.Append Header("Content-Disposition",
| > "attachment;fil ename="
| > +
| > | | > | fileID.ToString () + ".pdf");
| > | | > |
| > | | > | I tested the aspx page by using browser and it works just fine.
| > | | > |
| > | | > | Now I need to receive that file by using the
| > | | > | System.Net.WebC lient.DownloadF ile. The problem is that
| > DownloadFile
| > | | > method
| > | | > | returns the following exception:
| > | | > |
| > | | > | "Unable to read data from the transport connection: The
connection
| > was
| > | | > | closed."
| > | | > |
| > | | > | I tested the DownloadFile method to open a direct pdf file like
| > the
| > | | > | following statement:
| > | | > |
| > | | > | (new
| > | | > |
| > | | >
| > |
| >
System.Net.WebC lient()).Downlo adFile(http://localhost/test.pdf,"c:\\t est.pdf
| > | | > ");
| > | | > |
| > | | > | It works just fine.
| > | | > |
| > | | > | How can I use System.Net.WebC lient. DownloadFile to download
http
| > | | > | attachments?
| > | | > |
| > | | > | Any help would be apprecited,
| > | | > | Alan
| > | | > |
| > | | > |
| > | | > |
| > | | >
| > | |
| > | |
| > | |
| > |
| > |
| >
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