Download from a webpage

[Nikolay Petrov]

how to initiate a file download from an asp .net page?

thanks

 

[Herfried K. Wagner [MVP]]

how to initiate a file download from an asp .net page?

'WebClient.DownloadFile'.

 

[Nikolay Petrov]

if I use the WebClient, will it use the current configuration from the
browser, like proxy, cookies and other session specific information?

 

[Cor Ligthert]

Nikolay,

You cannot set anything on the users computer using an aspnet page without
his acknowledge (and standard settings), normally it is for the donwload
(here it is an upload)

input type file
http://msdn.microsoft.com/library/default.asp?url=/workshop/author/html/reference/elements.asp

I assume this does not help,

However better than nothing was my thought,

Cor

 

[Nikolay Petrov]

can I use Response.WriteFile

after testing an strange effect occured, instead initiating donwload,
the contents of the file are displayed in the browser window

 

[Cor Ligthert]

Nikolay,

Can you do it with that acknowledge?
That is very normal by the way.

(The redirect what you see is the normal situation)


Cor

 

[Nikolay Petrov]

thanks for efforts, i've managed to find a way:

Dim filename As String = "C:\SomeFile.txt"
Dim FS As FileStream = New FileStream(filename, FileMode.Open)
Dim iFullSize As Integer = FS.Length
Response.Clear()
Response.AddHeader("Content-Type", "binary/octet-stream")
Response.AddHeader("Content-Disposition", _
"attachment; filename=DownloadedImage.txt; size=" _
+ iFullSize.ToString())
Response.AddHeader("Content-Length", iFullSize.ToString())
Response.Flush()
Dim chunkSize As Integer = 1024
Dim i As Integer
For i = 0 To iFullSize Step chunkSize
' Everytime check to see if the browser is still connected
If (Not Response.IsClientConnected) Then
Exit For
End If
Dim size As Integer = chunkSize
If (i + chunkSize >= iFullSize) Then
size = (iFullSize - i)
End If

Dim chunk(size - 1) As Byte
FS.Read(chunk, 0, size)
Response.BinaryWrite(chunk)
Response.Flush()
Next
FS.Close()