We use cookies to give you the best experience on our website. If you continue to browse, then you agree to our privacy policy and cookie policy. Image for the cookie policy date
Unfortunately, activation email could not send to your email. Please try again.
Syncfusion Feedback

How to set upload file size limit for an UploadBox?

Platform: ASP.NET Web Forms |
Control: Uploadbox |
Product Version:
Tags: uploadbox


When you upload a file using an UploadBox, you can limit the upload file size, since uploading large files can be restricted by setting the file size limit.


Uploading a file can be restricted based on its size, by setting the maximum file size limit in the webconfig file. Create a website with UploadBox control and set the maxRequestLength key value for httpRuntime tag under system.web as follows.


The value of maxRequestLength has to be given in Kilo Bytes (KB).

When the application is run directly from the developer environment, it is enough to have the maxRequestLength added in httpRuntime section of system.web. But while deploying it to the server, you must set the maxAllowedContentLength value under system.webserver tag in webconfig, so that file limit is applied on hosting the website in server.


The value of maxAllowedContentLength should be given in Bytes.

2X faster development

The ultimate ASP.NET Web Forms UI toolkit to boost your development speed.
You must log in to leave a comment

Please sign in to access our KB

This page will automatically be redirected to the sign-in page in 10 seconds.

Up arrow icon

Warning Icon You are using an outdated version of Internet Explorer that may not display all features of this and other websites. Upgrade to Internet Explorer 8 or newer for a better experience.Close Icon

Live Chat Icon For mobile