How to find size limits for POST on IIS using ASP.NET?

Question

I have a web service where end users will download ZIP archives, which can be very large (one test file over 200 MB). I would like to handle oversized files proactively and size-limited download crashes gracefully.

Since the web application will be deployed on client computers, I cannot easily ensure that the configuration matches any fixed size. I have documented how to use the appcmd command for them to set requestLimits.maxAllowedContentLength to outside of 30 MB by default.

But I would like to process it in a web application; I hope for two things:

• To show the current limit on the page where they initiate the file download, something like lines:

  Each file download is limited to 15 MB. If your archive is larger, (etc. etc. etc.)

• To give a meaningful error when this size is exceeded. Currently, it takes a lot of time to send data, and then I see a misleading 404 page.

Any thoughts?

[change]

http://www.developer.com/db/article.php/10920_3426051_2/Limiting-Upload-Sizes-with-ASPNET.htm

I found this article, but although I can catch the error, I continue to get a reset connection in the browser Request.Redirect () or Context.RewritePath () , so it really is not better than 404. Hmm, actually this is with the server debugging VS2008, not with IIS.

Answer 1

masxAllowed,

protected int GetMaxUploadSize()
{
    System.Web.Configuration.HttpRuntimeSection httpRuntimeSec = (System.Web.Configuration.HttpRuntimeSection)ConfigurationManager.GetSection("system.web/httpRuntime");  
    if (httpRuntimeSec != null)  
    {  
       return httpRuntimeSec.MaxRequestLength;  
    }  
    else
    {
       return 0;
    }
}

web.config:

<system.webServer>
<security>
    <requestFiltering>
        <requestLimits maxAllowedContentLength="1000000" />
    </requestFiltering>
</security>

, , silverlight