Our ASP.NET C# web application is used in the following environment - .NET Framework 4 - IIS 7 - Windows 2008 - Visual Studio 2010 .NET IDE - C# - HTTPS ( SSL ) Our ASP.NET C# web application uploads various files like jpgs, mp4, mp3, pngs, docx, txt, etc to a folder called ClientBin. However, if we deploy the application to an IIS7 server, we have to give the web user of our application permission to upload file. We give the \IIS_IUSRS group permission to execute, read, write and execute on our ClientBin upload folder.
A web user can upload files that have size less than approximately 12MB.
However, when a web user uploads any more than approximately 12MB, the file that gets uploaded will be 0 bytes on the server's ClientBin upload folder.
In our Web.config, we have the following configurations for httpRuntime tag:
<system.web> ... ..... ........ .............. <httpRuntime maxRequestLength="1048576" executionTimeout="50000" useFullyQualifiedRedirectUrl="false" requestLengthDiskThreshold="15360" minFreeThreads="8" minLocalRequestFreeThreads="4" appRequestQueueLimit="100" /></system.web> In our Web.config, we have the following configurations for requestLimits tag: <system.webServer> ............. ......................... <security> <requestFiltering> <requestLimits maxAllowedContentLength="2000000000" /> <fileExtensions> <add fileExtension=".aspx" allowed="true" /> </fileExtensions> </requestFiltering> </security> </system.webServer>I also took the undesired approach of modifying the machine.config file by creating the following settings:
<system.web>
<processModel responseDeadlockInterval="0:09:00" responseRestartDeadlockInterval="0:09:00"/>
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</system.web>
In IIS 7, I clicked on the website and expanded it then clicked the ASP icon.
Expand the Limits Properties icon, and change the value in the “Maximum Requesting Entity Body Limit” to a value larger than 200000 (which is about 200kb). 4194304 would be about 4 Mb, 41943040 would be 40 Mb.
Why are uploaded files to ASP.NET web Application greater than 12MB being shown as 0MB ?