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Problem: No files are uploaded

Suggested actions

  • Make sure that the action parameter is of type IEnumerable or HttpPostedFileBase.

Using HttpPostedFile will not work.

Problem: Cannot upload large files

The default maximum upload size is limited to 4MB by ASP.NET. Additionally, IIS 7+ limits the request size to 30MB.

You can override these settings in the web.config file.

Suggested actions

  1. Increase the allowed request size and execution timeout in the httpRuntime section.

        <!-- The request length is in kilobytes, execution timeout is in seconds  -->
        <httpRuntime maxRequestLength="10240" executionTimeout="120" />
  2. Increase the allowed request size for IIS 7 in the requestFiltering section.

                    <!-- The content length is in bytes  -->
                    <requestLimits maxAllowedContentLength="10485760"/>

Problem: Requests to ASP.NET MVC actions are blocked during upload

Suggested actions

See Also

Upload Troubleshooting (all platforms)

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