How to Increase Maximum File Upload Size in ASP.NET Applications?

Boosting ASP.NET File Upload Limits

ASP.NET applications often encounter the default 4MB file upload size restriction. This guide details how to increase this limit using the maxRequestLength attribute in your web.config file.

Modifying the maxRequestLength Attribute

The maxRequestLength attribute controls the maximum HTTP request size (in KB) your application can handle. To adjust the maximum upload size, add or modify the following within your web.config file:

<code class="language-xml"><configuration>
  <system.web>
    <httpRuntime maxRequestLength="xxx" />
  </system.web>
</configuration></code>

Replace "xxx" with your desired maximum request length in kilobytes (KB).

Important Consideration: Application-Wide Scope

Remember, this setting impacts the entire application. Increasing maxRequestLength affects all file uploads globally. For more granular control, consider using alternative methods like the HttpPostedFile class or the HttpMultipartParser helper class to manage upload sizes on a per-page basis.

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