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.FileUpload 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.Upload)

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.FileUpload 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.Upload)

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.Ticks.ToString("x");

string url = ConfigurationManager.AppSettings["ServerAddress"];
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
httpWebRequest.ContentType = fileContentType+";+ boundary=" + boundary;
httpWebRequest.Method = "POST";
httpWebRequest.KeepAlive = true;
httpWebRequest.Timeout = 600000;
httpWebRequest.ReadWriteTimeout = 600000;
//httpWebRequest.AllowWriteStreamBuffering = true;
httpWebRequest.Credentials=System.Net.CredentialCa che.DefaultCredentials;

Stream memStream = new System.IO.MemoryStream();

byte[] boundarybytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
memStream.Write(boundarybytes, 0, boundarybytes.Length);

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

for(int i=0;i<files.Length;i++)
{
string header = string.Format(headerTemplate,"file"+i,new FileInfo(files[i]).Name);
byte[] headerbytes = System.Text.Encoding.UTF8.GetBytes(header);
memStream.Write(headerbytes,0,headerbytes.Length);
FileStream fileStream = new FileStream(files[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.Leng th);
fileStream.Close();
}

httpWebRequest.ContentLength = memStream.Length;

Stream requestStream = httpWebRequest.GetRequestStream();
memStream.Position = 0;
byte[] tempBuffer = new byte[memStream.Length];
memStream.Read(tempBuffer, 0, tempBuffer.Length);
memStream.Close();
requestStream.Write(tempBuffer, 0, tempBuffer.Length);
requestStream.Close();

try
{
WebResponse webResponse = httpWebRequest.GetResponse();
Stream stream = webResponse.GetResponseStream();
StreamReader reader = new StreamReader(stream);
Console.WriteLine(reader.ReadToEnd());
}
catch (Exception ex)
{
Console.WriteLine(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]

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