Download binary data from WebService

[Nikolay Petrov]

Any general ideas how to get binary data(files) from WebService to an
ASP .NET app and then save it to client's machine?

Thanks

 

[Cor Ligthert]

Nikolay,

You have first to serialize them.

A sample from Tom that I find nice

\\\Tom Shelton
Private Function SerializeFontObject(ByVal fnt As Font) As String
Dim bf As New BinaryFormatter
Dim mem As New MemoryStream
Try
bf.Serialize(mem, fnt)
Return Convert.ToBase64String(mem.ToArray())
Catch
Return String.Empty
Finally
mem.Close()
End Try
End Function
Private Function DeserializeFontObject(ByVal fnt As String) As Font
Dim bf As New BinaryFormatter
Dim mem As New MemoryStream(Convert.FromBase64String(fnt))
Try
Return DirectCast(bf.Deserialize(mem), Font)
Finally
If Not mem Is Nothing Then
mem.Close()
End If
End Try
End Function

I hope this helps a little bit?

Cor

 

[Nikolay Petrov]

I know I can also use DIME attachments, so I don't need to convert the
data to Base64.

my question was not very exact .

I am looking in to way of sending big files (over 10MB). The way of
using DIME attachements is good for this, because i can split the files
to parts, not send them as one piece. I've used the for upload and it
works great.

The problem is that I can't figure out how to ask the web service for
the first part, then second and so on.

when uploading to web service i do a FOR loop and send chunks if data
to service, which concantenates them in file, but how to make the
service reads parts of the file and send them is unclear to me.

the reason i want to split the transfered files to parts is that it
will consume a lot of memory at the server if I read the whole file,
serialize it and then start sending it.

 

[Cor Ligthert]

Nikolay,

I thought I answered this question already like this, however when not.

Why don't you just download them with webclient downloadfile, where you get
the url from the webservice

I hope this helps?

Cor

 

[Nikolay Petrov]

this will also work i guess


tnx.