Upload Large files(1GB)-ASP.net

Question

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

Answer 1

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 2

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();
        }

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

I know it is an old question, but still unanswered.

So this is what you have to do:

In you web.config file, add this in :

    <!-- 3GB Files / in kilobyte (3072*1024) -->
    <httpRuntime targetFramework="4.5" maxRequestLength="3145728"/>

and this under

<security>
    <requestFiltering>

      <!-- 3GB Files / in byte (3072*1024*1024) -->
      <requestLimits maxAllowedContentLength="3221225472" />

    </requestFiltering>
</security>

You see in the comment how this works. In one you need to have the sie in bytes and in the other one in kilobytes. Hope that helps.

Answer 5

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.

Answer 6

We have an app that occasionally needs to upload 1 and 2 GB files, so has been running into this as well. After much research, my conclusion is that we need to implement the previously mentioned NeatUpload, or something like it.

Also, be aware that

<requestLimits maxAllowedContentLength=.../>

is measured in bytes, while

<httpRuntime maxRequestLength=.../>

is measured in kilobytes. So your values should look more like this:

<httpRuntime maxRequestLength="2097151"/>
...
<requestLimits maxAllowedContentLength="2097151000"/>