最大请求长度超出例外

我正在尝试使用上传控件上传一个20兆文件,它在visual studio的内置webserver中工作正常,但一旦我发布到生产服务器(我无法访问),我会收到以下错误：

Server Error in '/' Application.
--------------------------------------------------------------------------------

Maximum request length exceeded. 
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.Web.HttpException: Maximum request length exceeded.

Source Error: 

An unhandled exception was generated during the execution of the current web request. information regarding the origin and location of the exception can be identified using the exception stack trace below.  

Stack Trace: 


[HttpException (0x80004005): Maximum request length exceeded.]
   System.Web.HttpRequest.GetEntireRawContent() [phone]
   System.Web.HttpRequest.GetMultipartContent() +72
   System.Web.HttpRequest.FillInFormCollection() +245
   System.Web.HttpRequest.get_Form() +119
   System.Web.HttpRequest.get_HasForm() [phone]
   System.Web.UI.Page.GetCollectionBasedOnMethod(Boolean dontReturnNull) +124
   System.Web.UI.Page.DeterminePostBackMode() +83
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint,Boolean includeStagesAfterasyncPoint) +270



--------------------------------------------------------------------------------

我已将以下内容添加到我的system.web节点,所以我不知道真正的问题是什么.

<httpRuntime executionTimeout="800" maxRequestLength="51200" />

这方面的任何方向都是非常有帮助的.

解决方法

你可以看看 here.

它指出相同的解决方案,但描述为什么.

这是微软的方式：here