Pure ASP.NET Upload - Restricting file size

Restricting file size

In this tutorial we will explain how to restrict the maximum size of the uploaded files.

There are two types of file size checking:

• check on the client browser, before file is uploaded - this is done when the files are images
• on the server, after file is uploaded - for the other file types.

How to do it

To make the file upload with restricted file size, you need to:

1. Start with basic upload page

   Start with an upload page where you have Pure ASP.NET Upload on it. If you
   haven't done it yet, go through the Simple file upload tutorial.

2. 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.



3. Select the Allowed Extensions

When you need to restrict the uploaded files to a specific size, you need to select the Limit Upload Size To field and enter the maximum size in KBytes.

Please note that 1024 Kbytes = 1MB
(KBytes = Kilo Bytes, MB = Mega Bytes)



In this example, we've chosen to limit the file upload size to 150 KBytes.

4. Save and done

Save your page and upload it to your server, and you are done! You shouldn't be able to upload images that are larger than 150 KBytes.