download File From a WEB Service in Windows Form

[Tom]

I'm wiritng a dot.net windows forms appliction that needs to connect to a
webservice to download some files.
I need to show a progress bar during the download, bacause some file can be
very big.
How Can i Mkae this?
Can i use a stream?
There are some samples?

I'm thinking to use a byte array to get, for each call, a chunck of bytes,
but I think also that in this way i'll made a lot of HTTP calls...

Thank you

[Pierre]

Hi Tom,

I use a service like that:

<%@ WebService Language="C#" Class="Manage_D ocument" %>
using System.Configur ation;
using System;
using System.Xml;
using System.Web;
using System.Web.Serv ices;
using System.Web.Serv ices.Protocols;
using System.IO;
using Hss.Com.WebServ ices.Exceptions Handler;

[WebService(Name space = "http://here.is.your.na mespeace")]
[WebServiceBindi ng(ConformsTo = WsiProfiles.Bas icProfile1_1)]
public class Manage_Document : System.Web.Serv ices.WebService {
protected string _file_path =
"C:\\Inetpub\\w wwroot\\Hss.Com .WebServices\\P ictures\\";
[WebMethod]
public bool SaveDocument(By te[] docbinaryarray, string docname) {
try {
string strdocPath;
strdocPath = _file_path + docname;
FileStream objfilestream = new FileStream(strd ocPath,
FileMode.Create , FileAccess.Read Write);
objfilestream.W rite(docbinarya rray, 0,
docbinaryarray. Length);
objfilestream.C lose();
} catch(Exception e) {
SoapExceptionMa nager mger = new
SoapExceptionMa nager(Namespace s.WebService);
mger.SetExcepti on(e);
SoapException se = new SoapException(" Fault occured",
SoapException.C lientFaultCode, Context.Request .Url.AbsoluteUr i,
mger.GetExcepti onNode());
throw se;
}
return true;
}

[WebMethod]
public int GetDocumentLen( string DocumentName) {
string strdocPath;
strdocPath = _file_path + DocumentName;
int len;
try {
FileStream objfilestream = new FileStream(strd ocPath,
FileMode.Open, FileAccess.Read );
len = (int)objfilestr eam.Length;
objfilestream.C lose();
} catch(Exception e) {
SoapExceptionMa nager mger = new
SoapExceptionMa nager(Namespace s.WebService);
mger.SetExcepti on(e);
SoapException se = new SoapException(" Fault occured",
SoapException.C lientFaultCode, Context.Request .Url.AbsoluteUr i,
mger.GetExcepti onNode());
throw se;
}
return len;
}

[WebMethod]
public Byte[] GetDocument(str ing DocumentName) {
string strdocPath;
strdocPath = _file_path + DocumentName;
Byte[] documentcontent s;
try {
FileStream objfilestream = new FileStream(strd ocPath,
FileMode.Open, FileAccess.Read );
int len = (int)objfilestr eam.Length;
documentcontent s = new Byte[len];
objfilestream.R ead(documentcon tents, 0, len);
objfilestream.C lose();
} catch(Exception e) {
SoapExceptionMa nager mger = new
SoapExceptionMa nager(Namespace s.WebService);
mger.SetExcepti on(e);
SoapException se = new SoapException(" Fault occured",
SoapException.C lientFaultCode, Context.Request .Url.AbsoluteUr i,
mger.GetExcepti onNode());
throw se;
}
return documentcontent s;
}
}

I found the base of this code somewhere online but there was no licence
on it, feel free to use and modify it at your will. The Soap Exceptions
Handler is home made, but I can give that as well if anybody needs it
;)

I hope this help.

Best regards,
Pierre

[Tom]

Using this code i am unable to show a progress bar because with the
getdocument method i get all the byte array..

If a file is large (es 20 MB) the time needed is too high!

[Pierre]

I also had a problem with my code. Here is exactly what you want:

http://www.codeproject.com/soap/MTOMWebServices.asp

I hope it helps.