The '' tag in the web.config file is where we need to change the file size limit. To allow large files to be uploaded in our website, we need to make a few configuration changes. The reason is, the upload file size limit is set to 4MB by default in ASP.NET. In a scenario where user has to have the ability to upload large files, just putting a file upload control in our website isn’t sufficient. This tip shows how one can facilitate the upload of large files in ASP.NET. But in some cases, while developing websites or web applications, we might come across requirements that specify: Allow users to upload large files (file size typically greater than 10MB). Even in the websites that we create using ASP.NET, we might have to put the asp:fileupload control to facilitate file upload feature. If we can assist as always please don't hesitate to open a support request or contact us.We all must have obviously uploaded files somewhere or the other. If you still experience problems uploading large files please also modify the connection timeout property within IIS as shown below… With both InstantForum and InstantKB you'll need to modify the existing element within the web.config as shown below… You may wish to adjust this based on your requirements. The example above 1536000 kilobytes or 1500 mb. The maxRequestLength attribute within the httpRuntime element is measured in kilobytes. You can see below we've updated the maxRequestLength attribute to 307200 kilobytes or 300mb.

In addition you will also need to modify the maxRequestLength within the httpRuntime element to allow larger uploads.

The default value is 30000000.The value above 524288000 is equal to 500mb. The maxAllowedContentLength attribute specifies the maximum length of content in a request, in bytes. IIS 7 / 8+ (Integrated Application Pools)įor IIS 7 or above you'll need to add the entire element below to your element… These defaults can be adjusted via the InstantForum & InstantKB web.config files. If you're attempting to upload files within either InstantForum or InstantKB and the upload times out or you receive a 404 page half way through the upload you may need to adjust some of the default thresholds provided within both InstantForum and InstantKB.

Uploading Large Files To IIS