文件上传大小被限制的解决方案。

修改配置文件Web.config

<httpRuntime targetFramework="4.5" maxRequestLength="2147483640" executionTimeout="300" />

<system.webServer>
    <validation validateIntegratedModeConfiguration="false" />
    <modules runAllManagedModulesForAllRequests="true" />
    <security>
      <requestFiltering>
        <requestLimits maxAllowedContentLength="2147483647"></requestLimits>
      </requestFiltering>
    </security>
  </system.webServer>