Upload Large files(1GB)-ASP.net

Question

I need to upload large files of atleast 1GB file size. I am using ASP.Net, C# and IIS 5.1 as my development platform.

I am using HIF.PostedFile.InputStream.Read(fileBytes,0,HIF.PostedFile.ContentLength) before using File.WriteAllBytes(filePath, fileByteArray)(doesnt go here but gives System.OutOfMemoryException' exception)

Currently i have set the httpRuntime to executionTimeout="999999" maxRequestLength="2097151"(thats 2GB!) useFullyQualifiedRedirectUrl="true" minFreeThreads="8" minLocalRequestFreeThreads="4" appRequestQueueLimit="5000" enableVersionHeader="true" requestLengthDiskThreshold="8192" Also i have set maxAllowedContentLength="2097151" (guess its only for IIS7)

I have changed IIS connection timeout to 999,999 secs too.

I am unable to upload files of even 4578KB(Ajaz-Uploader.zip)

Answer 1

Try copying without loading every thing in the memory :

public void CopyFile()
{
    Stream source = HIF.PostedFile.InputStream; //your source file
    Stream destination = File.OpenWrite(filePath); //your destination
    Copy(source, destination);
}

public static long Copy(Stream from, Stream to)
{
    long copiedByteCount = 0;

    byte[] buffer = new byte[2 << 16];
    for (int len; (len = from.Read(buffer, 0, buffer.Length)) > 0; )
    {
        to.Write(buffer, 0, len);
        copiedByteCount += len;
    }
    to.Flush();

    return copiedByteCount;
}

Hope this help.

Answer 2

Check this blog entry about large file uploads. It also has a few links to some discussion forums that can shed some light on this as well. The suggestion is to use custom HttpHandler for that or custom Flash/Silverlight control.

Good luck.

Answer 3

I googled and found - NeatUpload

---

Another solution would be to read the bytes on the client and send it to the server, the server saves the file. Example

Server: in Namespace - Uploader, class - Upload

[WebMethod]
public bool Write(String fileName, Byte[] data)
{
    FileStream  fs = File.Open(fileName, FileMode.Open);
    BinaryWriter bw = new BinaryWriter(fs); 
    bw.Write(data);
    bw.Close();

    return true;
}

Client:

string filename = "C:\..\file.abc";
Uploader.Upload up = new Uploader.Upload();
FileStream  fs = File.Create(fileName); 
BinaryReader br = new BinaryReader(fs);

// Read all the bytes
Byte[] data = br.ReadBytes();
up.Write(filename,data);

Answer 4

For IIS 6.0 you can change AspMaxEntityAllowed in Metabase.xml, but I don't think it's as straight forward in IIS 5.1.

This link may help, hope it does:

http://itonlinesolutions.com/phpbb3/viewtopic.php?f=3&t=63

Answer 5

Hello,

I think you should use Response.TransmitFile, this method does not load in web server memory the file, it streams the file without using web server resources.

if (Controller.ValidateFileExist())
        {
            ClearFields();
            Response.Clear();
            Response.ContentType = "text/plain";
            Response.AddHeader("content-disposition", String.Format("attachment; filename={0}", "FileNAme.Ext"));
            Response.TransmitFile(FileNAme.Ext);
            Response.End();
            Controller.DeleteFile();
        }

Hope it helps

Regards,