How to upload multiple files using HttpWebRequest in c#?

[abdunnabisk]

How to upload multiple files at a time using HttpWebRequest in c#?

thanks
Abdun Nabi Sk

[GregoryPankov]

How to upload multiple files at a time using HttpWebRequest in c#?

thanks
Abdun Nabi Sk

You can use WebClient.FileU pload method to send all files one by one to the server. Shortcoming: one file is sent in one request.

You can use third party components (ex:Chilkat.Upl oad)

Use can also write your own class, that based on HttpWebRequest. This class should implement RFC 1867 (www.ietf.org/rfc/rfc1867.txt). In this case you will need to build http request and send it to request stream.

[abdunnabisk]

Thansks for your reply.I want to upload more than one file using httpwebrequest in a single transaction and not one by one.Can you provide me some codes on that.

Thanks
Abdun nabi sk

You can use WebClient.FileU pload method to send all files one by one to the server. Shortcoming: one file is sent in one request.

You can use third party components (ex:Chilkat.Upl oad)

Use can also write your own class, that based on HttpWebRequest. This class should implement RFC 1867 (www.ietf.org/rfc/rfc1867.txt). In this case you will need to build http request and send it to request stream.

[abdunnabisk]

Finally I got this done...here is the code

string boundary = "----------------" +
DateTime.Now.Ti cks.ToString("x ");

string url = ConfigurationMa nager.AppSettin gs["ServerAddr ess"];
HttpWebRequest httpWebRequest = (HttpWebRequest )WebRequest.Cre ate(url);
httpWebRequest. ContentType = fileContentType +";+ boundary=" + boundary;
httpWebRequest. Method = "POST";
httpWebRequest. KeepAlive = true;
httpWebRequest. Timeout = 600000;
httpWebRequest. ReadWriteTimeou t = 600000;
//httpWebRequest. AllowWriteStrea mBuffering = true;
httpWebRequest. Credentials=Sys tem.Net.Credent ialCache.Defaul tCredentials;

Stream memStream = new System.IO.Memor yStream();

byte[] boundarybytes = System.Text.Enc oding.ASCII.Get Bytes("\r\n--" + boundary + "\r\n");
memStream.Write (boundarybytes, 0, boundarybytes.L ength);

string headerTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\ "\r\n Content-Type:" + defaultContentT ype + "\r\n\r\n";

for(int i=0;i<files.Len gth;i++)
{
string header = string.Format(h eaderTemplate," file"+i,new FileInfo(files[i]).Name);
byte[] headerbytes = System.Text.Enc oding.UTF8.GetB ytes(header);
memStream.Write (headerbytes,0, headerbytes.Len gth);
FileStream fileStream = new FileStream(file s[i], FileMode.Open,
FileAccess.Read );
byte[] buffer = new byte[1024];
int bytesRead = 0;

while ( (bytesRead = fileStream.Read (buffer, 0, buffer.Length)) != 0 )
{
memStream.Write (buffer, 0, bytesRead);
}

memStream.Write (boundarybytes, 0,boundarybytes .Length);
fileStream.Clos e();
}

httpWebRequest. ContentLength = memStream.Lengt h;

Stream requestStream = httpWebRequest. GetRequestStrea m();
memStream.Posit ion = 0;
byte[] tempBuffer = new byte[memStream.Lengt h];
memStream.Read( tempBuffer, 0, tempBuffer.Leng th);
memStream.Close ();
requestStream.W rite(tempBuffer , 0, tempBuffer.Leng th);
requestStream.C lose();

try
{
WebResponse webResponse = httpWebRequest. GetResponse();
Stream stream = webResponse.Get ResponseStream( );
StreamReader reader = new StreamReader(st ream);
Console.WriteLi ne(reader.ReadT oEnd());
}
catch (Exception ex)
{
Console.WriteLi ne(ex.ToString( ));
}
finally
{
}
httpWebRequest = null;

Thansks for your reply.I want to upload more than one file using httpwebrequest in a single transaction and not one by one.Can you provide me some codes on that.

Thanks
Abdun nabi sk

[azmanamutalib]

How to receive multiple files?

That's great! But how do we actually receive the multiple files? Do you have any code sample for the receiving URL?

Thanks.

Regards,
Azman