File download

  • Thread starter Thread starter Andrew Chalk
  • Start date Start date
A

Andrew Chalk

How do I do file download from an ASP.NET v1.x page?

Specifically if I have a link e.g. "Download" in a datagrid what code will
cause the file download dialog to appear to the user?

Many thanks.
 
...
How do I do file download from an ASP.NET v1.x page?

Specifically if I have a link e.g. "Download" in a datagrid what code will
cause the file download dialog to appear to the user?
Click to expand...

<a href="my_file_to_download.zip" title="Download me!">Download</a>

Rob
 
What are the advantages and disadvantages of that versus the WebClient
class?

Thanks,

Andrew
 
The webclient class allows to do this programmtically from an application.

Unless you do this from a client side application, it would be useless (that
is it would run server side so you would get the file on the server anyway).

--
 
So I can't use WebClient on an ASP.NET page to download a file to a browser
client?

Thanks.
 
Andrew said:
So I can't use WebClient on an ASP.NET page to download a file to a
browser client?
Click to expand...

No, because it's a *client*. On the server-side, you can either provide
"direct" download capability (i.e. a hyperlink to URL that represents a
physical file) or "programmed" downloads (i.e. a hyperlink to a ASP.NET
page or a HttpHandler, which performs the download).

cheers,
 
I need the latter. I.e. an HttpHandler. Can you refer me to an example of
this?

Many thanks.
 
I do have one problem however: If I am downloading a file named
"AJC2.00.040.000001.wav"
the download dialog displays it as:

"AJC2[1].00.040.000001.wav"

AJC2, incidentally, is the server name.

Does anyone have any idea how to stop this?

Many thanks.

Andrew Chalk said:
Thanks, although that is really too general for this problem. A more
general reference is:

http://www.asp101.com/samples/download_sample_aspx.asp

- Andrew
Click to expand...
 
FYI: The code I use is:
Response.Clear();

Response.ContentType = "application/x-download";

Response.AddHeader("Content-Disposition", "attachment; filename=" +
sFileName);



Andrew Chalk said:
I do have one problem however: If I am downloading a file named
"AJC2.00.040.000001.wav"
the download dialog displays it as:

"AJC2[1].00.040.000001.wav"

AJC2, incidentally, is the server name.

Does anyone have any idea how to stop this?

Many thanks.
Click to expand...
 
...
FYI: The code I use is:
Response.Clear();

Response.ContentType = "application/x-download";

Response.AddHeader("Content-Disposition", "attachment; filename=" +
sFileName);
Click to expand...

Did that get rid of the square brackets?

Regards

Rob
 
No, that is the code under which they are produced. This is a very odd
problem.

- A
 
...
No, that is the code under which they are produced. This is a very odd
problem.
Click to expand...

As I suspected :o)

I've encountered this problem myself with a document management application
I wrote, I believe it happens for 2 reasons (1 more than the other I think)
....

1. If the file is already within the clients temporary internet files as a
cached version you'll get a [n] on the end,with the n referring to a numeric
value indicating another duplicate of the same file.

2. When you have more than one . (dot) in the file name it is then unable to
determine the file extension thus it adds some square brackets.

We completely removed this issue in our scenario by removing addition .'s
(dots) from the file names, you could perhaps replace them with underscores
or hyphens if you really need something.

It might not be what you want, but try it - you'll probably find you no
longer get the [ ] once you remove the additions dots..

HTH

Rob
 
Thanks, Rob. That's very helpful.

Regards,

Andrew
Rob Meade said:
...
No, that is the code under which they are produced. This is a very odd
problem.
Click to expand...

As I suspected :o)

I've encountered this problem myself with a document management
application I wrote, I believe it happens for 2 reasons (1 more than the
other I think) ...

1. If the file is already within the clients temporary internet files as a
cached version you'll get a [n] on the end,with the n referring to a
numeric value indicating another duplicate of the same file.

2. When you have more than one . (dot) in the file name it is then unable
to determine the file extension thus it adds some square brackets.

We completely removed this issue in our scenario by removing addition .'s
(dots) from the file names, you could perhaps replace them with
underscores or hyphens if you really need something.

It might not be what you want, but try it - you'll probably find you no
longer get the [ ] once you remove the additions dots..

HTH

Rob
Click to expand...
 
FYI: I can't delete the periods, so I think my users are going to live with
this quirk.

- A
 
...
FYI: I can't delete the periods, so I think my users are going to live
with this quirk.
Click to expand...

Hi Andrew,

Is this because of a technical reason or because of a "policy" within your
organisation (ie,someone saying - no they must have those periods there) ?

Regards

Rob
 
policy-wolicy..
Rob Meade said:
...


Hi Andrew,

Is this because of a technical reason or because of a "policy" within your
organisation (ie,someone saying - no they must have those periods there) ?

Regards

Rob
Click to expand...
 
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