<!--网页允许的最大设置节点--> <system.web> <httpRuntime targetFramework="4.5" maxRequestLength="409600" /> </system.web> <!--IIS允许的最大设置节点--> <system.webServer> <security> <requestFiltering> <requestLimits maxAllowedContentLength="2072576000"/><!--2G--> </requestFiltering> </security> </system.webServer>