Member Avatar for love_dude1984

hi..

im using file upload control to upload some files on my server. but the problem with the same is it uploads the files of specific size only. for ex, if i upload a file in KB's, it works perfectly...but when i try to upload files of more than 1 or 2 mb's, it directly goes on a internet page with error, which is because of the size if the file..

is there any way by which i can upload an file with max size?

Hoping for a reply soon..

Thanks..

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  • Latest Post Latest Post by mail2saion

Dani AI

Generated

Common cause: the upload is being blocked by server-side limits rather than the FileUpload control itself. As pointed out, raising ASP.NET's request limit often fixes this; as suggested, post the exact exception if you still see the problem — the error text or HTTP code tells you which limit is firing.

Two places to check and change (don’t forget both):

  • ASP.NET-level: httpRuntime has maxRequestLength (measured in KB; default 4096). See the httpRuntime docs for details: .
  • IIS-level (IIS7+): request filtering uses maxAllowedContentLength (measured in bytes). If IIS blocks the request you may see a 404.13 or a 413. Update the requestLimits entry in system.webServer when needed. Example snippet for web.config (adjust bytes to the size you need):
<system.webServer>
  <security>
    <requestFiltering>
      <requestLimits maxAllowedContentLength="52428800" />
    </requestFiltering>
  </security>
</system.webServer>

Troubleshooting checklist

  • Capture the exact exception or HTTP status code (HTTP 413 / IIS 404.13 or ASP.NET “Maximum request length exceeded”).
  • Restart the app after web.config changes and check IIS logs / Windows Event Viewer.
  • If hosted, verify the host permits changes — some providers enforce limits at the control panel.
  • For very large uploads consider chunked/streamed uploads or uploading directly to object storage (to avoid buffering and heavy server load).
  • Keep security in mind: validate file type/size, use authentication, and don’t set unlimited sizes.

Adjusting both ASP.NET and IIS settings and confirming the exact error message will pinpoint the fix.

Recommended Answers

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Member Avatar for fawadkhalil

Use Try Catch block and post exact exception that is being thrown.

Member Avatar for mail2saion

Make the following change in the node of the system.web section of the web.config file:

<httpRuntime maxRequestLength="11000" executionTimeout="275"/>

If does not resolve then post exact error message.

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