Download from button click

[John Smith Jr.]

Is there a way to have the server send a file to client (ie download) from a
button click and a filename string?

[Richard K Bethell]

"John Smith Jr." <[e-mail]> wrote in message
news:ON******** ******@TK2MSFTN GP12.phx.gbl...

Is there a way to have the server send a file to client (ie download) from a button click and a filename string?

Yes. And it can even be done with client side code if you want, using an
<input type="button"
onclick="javasc ript:window.loc ation.href='MyD ownload.pdf' /> type of form
element.

if you want to stream it on the server, you can open a FileStream and post
the resulting binary data to the Response.Output Stream

R.

[Ken Cox [Microsoft MVP]]

Hi John,

If you want a server-side method, try this?

Private Sub LinkButton1_Cli ck _
(ByVal sender As System.Object, _
ByVal e As System.EventArg s) _
Handles LinkButton1.Cli ck
Dim FilePath As String = "C:\downloads\s etup.exe"
Dim FileName As String = "setup.exe"
'Set the appropriate ContentType.
Response.Conten tType = "applicatio n/octet-stream"
Response.AddHea der("Content-Disposition", _
"attachment ; filename=" & FileName)
'Write the file directly to the HTTP output stream.
Response.WriteF ile(FilePath)
Response.End()
End Sub
<form id="Form1" method="post" runat="server">
<asp:LinkButt on id="LinkButton1 " runat="server"> Click to
download</asp:LinkButton>
</form>
"John Smith Jr." <[e-mail]> wrote in message
news:ON******** ******@TK2MSFTN GP12.phx.gbl...

Is there a way to have the server send a file to client (ie download) from a button click and a filename string?

[John Smith Jr.]

That worked great!
Thank you much.

Had to convert it to C#, but thats pretty easy.

A few questions though, there is a pause before it starts downloading, which
isn't to long but it is local lan, not a big deal though. But it seems to
use "default" as a file name, is there anyway to set what the destination
file name should be by default?
"Ken Cox [Microsoft MVP]" <BA************ @sympatico.ca> wrote in message
news:eO******** ******@TK2MSFTN GP12.phx.gbl...

Hi John,

If you want a server-side method, try this?

Private Sub LinkButton1_Cli ck _
(ByVal sender As System.Object, _
ByVal e As System.EventArg s) _
Handles LinkButton1.Cli ck
Dim FilePath As String = "C:\downloads\s etup.exe"
Dim FileName As String = "setup.exe"
'Set the appropriate ContentType.
Response.Conten tType = "applicatio n/octet-stream"
Response.AddHea der("Content-Disposition", _
"attachment ; filename=" & FileName)
'Write the file directly to the HTTP output stream.
Response.WriteF ile(FilePath)
Response.End()
End Sub
<form id="Form1" method="post" runat="server">
<asp:LinkButt on id="LinkButton1 " runat="server"> Click to
download</asp:LinkButton>
</form>
"John Smith Jr." <[e-mail]> wrote in message
news:ON******** ******@TK2MSFTN GP12.phx.gbl...

Is there a way to have the server send a file to client (ie download)

from a

button click and a filename string?

[Ken Cox [Microsoft MVP]]

Hi John,

It should be using whatever name you supply the FileName variable, which in
my code is "setup.exe" . Not sure how Default enters it, unless it is picking
that up from the name of your .aspx page.

As for the speed, it should be quite fast unless something is taking time to
compile or check permissions.

Ken

"John Smith Jr." <[e-mail]> wrote in message
news:%2******** ********@tk2msf tngp13.phx.gbl. ..

That worked great!
Thank you much.

Had to convert it to C#, but thats pretty easy.

A few questions though, there is a pause before it starts downloading, which isn't to long but it is local lan, not a big deal though. But it seems to
use "default" as a file name, is there anyway to set what the destination
file name should be by default?
"Ken Cox [Microsoft MVP]" <BA************ @sympatico.ca> wrote in message
news:eO******** ******@TK2MSFTN GP12.phx.gbl...

Hi John,

If you want a server-side method, try this?

Private Sub LinkButton1_Cli ck _
(ByVal sender As System.Object, _
ByVal e As System.EventArg s) _
Handles LinkButton1.Cli ck
Dim FilePath As String = "C:\downloads\s etup.exe"
Dim FileName As String = "setup.exe"
'Set the appropriate ContentType.
Response.Conten tType = "applicatio n/octet-stream"
Response.AddHea der("Content-Disposition", _
"attachment ; filename=" & FileName)
'Write the file directly to the HTTP output stream.
Response.WriteF ile(FilePath)
Response.End()
End Sub
<form id="Form1" method="post" runat="server">
<asp:LinkButt on id="LinkButton1 " runat="server"> Click to
download</asp:LinkButton>
</form>
"John Smith Jr." <[e-mail]> wrote in message
news:ON******** ******@TK2MSFTN GP12.phx.gbl...

Is there a way to have the server send a file to client (ie download)

from

a

button click and a filename string?

[John Smith Jr.]

I tried changing the name of the form to default2, and the default file name
changed to default2.

Also, when it shows save as dialog, the file type is blank, i assume this is
because it saves it as "default2" without an extension. But if there was a
way to change this default filename, it would be great.
"Ken Cox [Microsoft MVP]" <BA************ @sympatico.ca> wrote in message
news:%2******** ********@tk2msf tngp13.phx.gbl. ..

Hi John,

It should be using whatever name you supply the FileName variable, which in my code is "setup.exe" . Not sure how Default enters it, unless it is picking that up from the name of your .aspx page.

As for the speed, it should be quite fast unless something is taking time to compile or check permissions.

Ken

"John Smith Jr." <[e-mail]> wrote in message
news:%2******** ********@tk2msf tngp13.phx.gbl. ..

That worked great!
Thank you much.

Had to convert it to C#, but thats pretty easy.

A few questions though, there is a pause before it starts downloading,

which

isn't to long but it is local lan, not a big deal though. But it seems to use "default" as a file name, is there anyway to set what the destination file name should be by default?
"Ken Cox [Microsoft MVP]" <BA************ @sympatico.ca> wrote in message
news:eO******** ******@TK2MSFTN GP12.phx.gbl...

Hi John,

If you want a server-side method, try this?

Private Sub LinkButton1_Cli ck _
(ByVal sender As System.Object, _
ByVal e As System.EventArg s) _
Handles LinkButton1.Cli ck
Dim FilePath As String = "C:\downloads\s etup.exe"
Dim FileName As String = "setup.exe"
'Set the appropriate ContentType.
Response.Conten tType = "applicatio n/octet-stream"
Response.AddHea der("Content-Disposition", _
"attachment ; filename=" & FileName)
'Write the file directly to the HTTP output stream.
Response.WriteF ile(FilePath)
Response.End()
End Sub
<form id="Form1" method="post" runat="server">
<asp:LinkButt on id="LinkButton1 " runat="server"> Click to
download</asp:LinkButton>
</form>
"John Smith Jr." <[e-mail]> wrote in message
news:ON******** ******@TK2MSFTN GP12.phx.gbl...
> Is there a way to have the server send a file to client (ie

download) from

a
> button click and a filename string?
>
>

[Ken Cox [Microsoft MVP]]

Perhaps you could show us the code so we can demonstrate how it should work?

"John Smith Jr." <[e-mail]> wrote in message
news:eB******** *****@tk2msftng p13.phx.gbl...

I tried changing the name of the form to default2, and the default file name changed to default2.

Also, when it shows save as dialog, the file type is blank, i assume this is because it saves it as "default2" without an extension. But if there was a way to change this default filename, it would be great.

[John Smith Jr.]

This is the method i am using and it uses the name of the form for the
default filename:
private void downloadFileBut ton_Click (object sender, System.EventArg s e)
{
Button myButton;
myButton = (Button)sender;

// pass through the filename from the table row
// TODO: convert to viewstate for security
string filename = myButton.Attrib utes["file"].ToString();

// set http headers and content type
Response.Conten tType = "applicatio n/octet-stream";
Response.AddHea der("Content-Disposition", "Attachment ; filename=" +
filename);

// send file
Response.WriteF ile(filename);

// disconnect
Response.End();
}
"Ken Cox [Microsoft MVP]" <BA************ @sympatico.ca> wrote in message
news:eM******** ******@TK2MSFTN GP10.phx.gbl...

Perhaps you could show us the code so we can demonstrate how it should work?
"John Smith Jr." <[e-mail]> wrote in message
news:eB******** *****@tk2msftng p13.phx.gbl...

I tried changing the name of the form to default2, and the default file name

changed to default2.

Also, when it shows save as dialog, the file type is blank, i assume

this is

because it saves it as "default2" without an extension. But if there

was a

way to change this default filename, it would be great.

[Ken Cox [Microsoft MVP]]

Hi John,

Your problem was here near the end:

Response.WriteF ile(filepath);

That's where you supply the physical file that you are sending. Filename is
just the friendly/default name to show in the browser.

private void downloadFileBut ton_Click (object sender, System.EventArg s e)
{
Button myButton;
myButton = (Button)sender;

// pass through the filename from the table row
// TODO: convert to viewstate for security
//string filename = myButton.Attrib utes["file"].ToString();
string filename = myButton.Comman dArgument;
string filepath = "c:\\temp\\setu p.exe";
// set http headers and content type
Response.ClearC ontent();
Response.ClearH eaders();
Response.Conten tType = "applicatio n/octet-stream";
Response.AddHea der("Content-Disposition", "attachment;fil ename=" +
filename.ToStri ng());
// TODO: John: Remember that the filepath and filename are two
// different issues. One is for your program to find the file
// the other is to give to give a friendly default name for the download
// send file
// Change this to the physical file name you want to send
Response.WriteF ile(filepath);

// disconnect
Response.End();
}
"John Smith Jr." <[e-mail]> wrote in message
news:ON******** ******@TK2MSFTN GP12.phx.gbl...

This is the method i am using and it uses the name of the form for the
default filename:
private void downloadFileBut ton_Click (object sender, System.EventArg s e) {
Button myButton;
myButton = (Button)sender;

// pass through the filename from the table row
// TODO: convert to viewstate for security
string filename = myButton.Attrib utes["file"].ToString();

// set http headers and content type
Response.Conten tType = "applicatio n/octet-stream";
Response.AddHea der("Content-Disposition", "Attachment ; filename=" +
filename);

// send file
Response.WriteF ile(filename);

// disconnect
Response.End();
}
"Ken Cox [Microsoft MVP]" <BA************ @sympatico.ca> wrote in message
news:eM******** ******@TK2MSFTN GP10.phx.gbl...

Perhaps you could show us the code so we can demonstrate how it should

work?

"John Smith Jr." <[e-mail]> wrote in message
news:eB******** *****@tk2msftng p13.phx.gbl...

I tried changing the name of the form to default2, and the default

file name

changed to default2.

Also, when it shows save as dialog, the file type is blank, i assume

this

is

because it saves it as "default2" without an extension. But if there

was

a

way to change this default filename, it would be great.

[John Smith Jr.]

That worked great, thank you much Ken.

Great help.
"Ken Cox [Microsoft MVP]" <BA************ @sympatico.ca> wrote in message
news:ej******** ******@TK2MSFTN GP12.phx.gbl...

Hi John,

Your problem was here near the end:

Response.WriteF ile(filepath);

That's where you supply the physical file that you are sending. Filename is just the friendly/default name to show in the browser.

private void downloadFileBut ton_Click (object sender, System.EventArg s e) {
Button myButton;
myButton = (Button)sender;

// pass through the filename from the table row
// TODO: convert to viewstate for security
//string filename = myButton.Attrib utes["file"].ToString();
string filename = myButton.Comman dArgument;
string filepath = "c:\\temp\\setu p.exe";
// set http headers and content type
Response.ClearC ontent();
Response.ClearH eaders();
Response.Conten tType = "applicatio n/octet-stream";
Response.AddHea der("Content-Disposition", "attachment;fil ename=" +
filename.ToStri ng());
// TODO: John: Remember that the filepath and filename are two
// different issues. One is for your program to find the file
// the other is to give to give a friendly default name for the download // send file
// Change this to the physical file name you want to send
Response.WriteF ile(filepath);

// disconnect
Response.End();
}
"John Smith Jr." <[e-mail]> wrote in message
news:ON******** ******@TK2MSFTN GP12.phx.gbl...

This is the method i am using and it uses the name of the form for the
default filename:
private void downloadFileBut ton_Click (object sender, System.EventArg s

e)

{
Button myButton;
myButton = (Button)sender;

// pass through the filename from the table row
// TODO: convert to viewstate for security
string filename = myButton.Attrib utes["file"].ToString();

// set http headers and content type
Response.Conten tType = "applicatio n/octet-stream";
Response.AddHea der("Content-Disposition", "Attachment ; filename=" +
filename);

// send file
Response.WriteF ile(filename);

// disconnect
Response.End();
}
"Ken Cox [Microsoft MVP]" <BA************ @sympatico.ca> wrote in message
news:eM******** ******@TK2MSFTN GP10.phx.gbl...

Perhaps you could show us the code so we can demonstrate how it should

work?

"John Smith Jr." <[e-mail]> wrote in message
news:eB******** *****@tk2msftng p13.phx.gbl...
> I tried changing the name of the form to default2, and the default file name
> changed to default2.
>
> Also, when it shows save as dialog, the file type is blank, i assume

this

is
> because it saves it as "default2" without an extension. But if

there was

a
> way to change this default filename, it would be great.
>