ASP.NET Error - Maximum request length exceeded - Solved

Solution for ASP.NET (.NET Framework)

In your web.config, increase the maxRequestLength value under <httpRuntime>. Open web.config file in your project and find maxRequestLength or httpRuntime tag.

<configuration>
  <system.web>
    <httpRuntime maxRequestLength="10240" executionTimeout="3600" />
  </system.web>
</configuration>

• maxRequestLength is in KB.
• For Example:
• 10240 = 10 MB
• 51200 = 50 MB
• 102400 = 100 MB

If you're using IIS 7+, then you also need to increase the IIS request limit.

XML:

<configuration>
  <system.webServer>
    <security>
      <requestFiltering>
        <requestLimits maxAllowedContentLength="104857600" />
      </requestFiltering>
    </security>
  </system.webServer>
</configuration>

• maxAllowedContentLength is in bytes.
• 104857600 = 100 MB

Solution for ASP.NET Core

In ASP.NET Code, the configuration is different. For example, in Program.cs,

builder.Services.Configure<IISServerOptions>(options =>
{
    options.MaxRequestBodySize = 104857600; // 100 MB
});

If you are still getting the error, then check...

• if the upload file size is not larger than the configured limits.
• IIS requestFiltering settings are updated.
• Restart the application or IIS after changing web.config if the changes are not picked up automatically.

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