Uploading large files

Uploading large files

In this tutorial we will explain how to upload large files.

How to do it

To upload large files you need to:

1.  Open the Pure ASP.NET Upload dialog

   Select the Pure ASP.NET Upload dialog by opening the Server Behaviors Panel. Select DMXzone - Pure ASP.NET Upload.



2.  Change the timeout

When you need to upload large files, you need to increase the script timeout. You can easily calculate this time:

A 28.8kbps modem can download at a speed of approximately 2,5KB/s. So when you need to upload a file of 1MB (equals to 1.024KB) it will take 1.024 / 2.5 = 410 seconds. Always allow extra time so set the timeout to at least 500 seconds.

Unfortunately, ASP.NET has another mechanism to avoid deadlocks, which should be taken into account. In the machine.config file (usually located in C:\Windows\Microsoft.NET\framework\v1.0xxx.x\config) there is a setting called "responseDeadlockInterval" of the "processModel" node and this must be set to a larger value than the default "00:03:00". It can also be set to = "Infinite".



When the timeout is not sufficient the user will see a timeout error - so always make the timeout larger than you think is necessary.

3.  Save and done

Save your page and upload it to your server, and you are done! Go to your website and test it - you should be able to upload large files now.