Hello, 
I have the following section of code in a popup window that is opened from 
other page when clicking a button:
The downloadFile method is called from the Page_Load Event.

private void downloadFile(string filename)
{
               Response.ClearHeaders();
                Response.ClearContent();

                // set the http content type to "APPLICATION/OCTET-STREAM
                Response.ContentType = "APPLICATION/OCTET-STREAM";

                // initialize the http content-disposition header to
                // indicate a file attachment with the default filename
                // "myFile.txt"
                //String disHeader = "Attachment; Filename=\"" + filename + 
"\"";
                string disHeader = "Attachment; Filename=" + filename;
                Response.AppendHeader("Content-Disposition", disHeader);

                // transfer the file byte-by-byte to the response object
                System.IO.FileInfo fileToDownload = new 
System.IO.FileInfo(Server.MapPath("Downloads") + "\\" + filename);            
    
                Response.Flush();
                Response.WriteFile(fileToDownload.FullName);
                Response.End();
}

This code works okay when running locally (http://localhost/site). If I try 
to run it on a server in the internet (http://server/site) it does not show 
the file download dialog. 
The popup window is shown very fast, then it is closed right away.

Any ideas? Is it a security issue?

Thank you,

Carlos

On Jun 18, 10:11 pm, Carlos Lozano
 wrote:

> Hello,
> I have the following section of code in a popup window that is opened from
> other page when clicking a button:
> The downloadFile method is called from the Page_Load Event.
>
> private void downloadFile(string filename)
> {
>                Response.ClearHeaders();
>                 Response.ClearContent();
>
>                 // set the http content type to "APPLICATION/OCTET-STREAM
>                 Response.ContentType = "APPLICATION/OCTET-STREAM";
>
>                 // initialize the http content-disposition header to
>                 // indicate a file attachment with the default filename
>                 // "myFile.txt"
>                 //String disHeader = "Attachment; Filename=\"" + filename +
> "\"";
>                 string disHeader = "Attachment; Filename=" + filename;
>                 Response.AppendHeader("Content-Disposition", disHeader);
>
>                 // transfer the file byte-by-byte to the response object
>                 System.IO.FileInfo fileToDownload = new
> System.IO.FileInfo(Server.MapPath("Downloads") + "\\" + filename);            
>
>                 Response.Flush();
>                 Response.WriteFile(fileToDownload.FullName);
>                 Response.End();
>
> }
>
> This code works okay when running locally (http://localhost/site). If I try
> to run it on a server in the internet (http://server/site) it does not show
> the file download dialog.
> The popup window is shown very fast, then it is closed right away.
>
> Any ideas? Is it a security issue?
>
> Thank you,
>
> Carlos


Try to add a try..catch block to see the error (if any)

try {
....your code
} catch (Exception e)
// file IO errors
{
   Response.Write (e.getMessage());
}

also try to check the path you get in fileToDownload.FullName

That is exactly why I am puzzled. 
The file path is okay and no exception happens. It just does not do what it 
should do when installed on the server. In addition the download page is 
closed automatically, I have not code for closing it. So it is weird.

"Alexey Smirnov" wrote:


> On Jun 18, 10:11 pm, Carlos Lozano
>  wrote:
> > Hello,
> > I have the following section of code in a popup window that is opened from
> > other page when clicking a button:
> > The downloadFile method is called from the Page_Load Event.
> >
> > private void downloadFile(string filename)
> > {
> >                Response.ClearHeaders();
> >                 Response.ClearContent();
> >
> >                 // set the http content type to "APPLICATION/OCTET-STREAM
> >                 Response.ContentType = "APPLICATION/OCTET-STREAM";
> >
> >                 // initialize the http content-disposition header to
> >                 // indicate a file attachment with the default filename
> >                 // "myFile.txt"
> >                 //String disHeader = "Attachment; Filename=\"" + filename +
> > "\"";
> >                 string disHeader = "Attachment; Filename=" + filename;
> >                 Response.AppendHeader("Content-Disposition", disHeader);
> >
> >                 // transfer the file byte-by-byte to the response object
> >                 System.IO.FileInfo fileToDownload = new
> > System.IO.FileInfo(Server.MapPath("Downloads") + "\\" + filename);            
> >
> >                 Response.Flush();
> >                 Response.WriteFile(fileToDownload.FullName);
> >                 Response.End();
> >
> > }
> >
> > This code works okay when running locally (http://localhost/site). If I try
> > to run it on a server in the internet (http://server/site) it does not show
> > the file download dialog.
> > The popup window is shown very fast, then it is closed right away.
> >
> > Any ideas? Is it a security issue?
> >
> > Thank you,
> >
> > Carlos
> 
> Try to add a try..catch block to see the error (if any)
> 
> try {
> ....your code
> } catch (Exception e)
> // file IO errors
> {
>    Response.Write (e.getMessage());
> }
> 
> also try to check the path you get in fileToDownload.FullName
> 
>